#linuxcnc | Logs for 2015-12-31

[00:01:23] <Jymmm> These are kinda cool, can use the RGB LED as status indicator at a glance https://www.adafruit.com/product/398
[00:03:22] <XXCoder> that is cool
[00:04:25] <Jymmm> All kinds of options these days.... https://www.adafruit.com/category/63
[00:05:32] <Jymmm> The OLED's are kinda neat too.
[00:05:54] <Jymmm> can do graphics with them, not just text/ascii
[00:06:13] <ReadError> on MESA devices, can most pins (step/dir/encoders) be used as generic I/O (step/dir=output, encoder=input) ?
[00:06:39] <XXCoder> Jymmm: how do you control what it displaus anyway?
[00:06:45] <XXCoder> can raspiberry control it?
[00:06:52] <XXCoder> I do have CHiP now
[00:06:54] <Jymmm> XXCoder: on which? the LCD or OLED?
[00:06:54] <ReadError> XXCoder i2c or spi typically
[00:07:12] <ReadError> on those type of LCD/OLED with controllers
[00:07:15] <XXCoder> oled
[00:08:06] <Jymmm> XXCoder: https://www.youtube.com/watch?v=_t_lfcGV_YM
[00:08:23] <XXCoder> just $4
[00:08:31] <Jymmm> XXCoder: this is shorter (10m) https://www.youtube.com/watch?v=VEZGn0zYHiE
[00:09:27] <Jymmm> XXCoder: https://learn.adafruit.com/monochrome-oled-breakouts
[00:10:22] <Jymmm> XXCoder: sold off ebay too =)
[00:10:34] <XXCoder> nice :)
[00:20:04] <Jymmm> There are $3 arduino nanos too off ebay
[00:20:21] <XXCoder> currently reading up on how to use my chip
[00:20:28] <Jymmm> chip?
[00:20:33] <XXCoder> yeah
[00:20:38] <Jymmm> what chip?
[00:20:39] <XXCoder> such a stupid name
[00:20:45] <XXCoder> chip by next thing
[00:20:51] <Jymmm> link?
[00:20:55] <XXCoder> stupid company name too, fails google test
[00:21:02] <XXCoder> http://bbs.nextthing.co
[00:21:31] <Jymmm> wtf is it?
[00:21:58] <XXCoder> https://www.kickstarter.com/projects/1598272670/chip-the-worlds-first-9-computer
[00:22:01] <XXCoder> better details
[00:24:02] <Jymmm> XXCoder: Eh, $3 ebay or less in qty... Can use as arduino sketches https://www.sparkfun.com/products/13678
[00:24:28] <Jymmm> XXCoder: http://makezine.com/2015/04/01/esp8266-5-microcontroller-wi-fi-now-arduino-compatible/
[00:24:57] <XXCoder> nice
[00:25:40] <Jymmm> other models have more I/O
[00:26:17] <Jymmm> But to have a completely self contianed wifi ap/client both and an I/O is pretty amazing
[00:26:57] <Jymmm> sometimes you'll find 3 for $5
[00:29:06] <XXCoder> its booted up lol
[00:29:19] <XXCoder> using my eyeclops projector
[00:29:35] <Jymmm> OS ?
[00:29:40] <XXCoder> linux
[00:29:50] <Jymmm> distro?
[00:29:58] <XXCoder> debian based
[00:31:40] <XXCoder> lol my projector resolution sucks
[00:32:33] <Jymmm> http://www.ebay.com/itm/Rotary-Encoder-Illuminated-RGB-/221588158665
[00:35:11] <XXCoder> might be useful for cnc
[00:35:19] <XXCoder> status/knob combine
[00:36:18] <XXCoder> it seems to be decent linux
[00:36:22] <XXCoder> just really tiny!
[00:41:59] <Jymmm> so is my 6.1" phablet =)
[00:42:08] <Jymmm> battery included =)
[00:42:37] <XXCoder> lol yea
[00:42:42] <XXCoder> it does have pinouts though
[00:42:49] <XXCoder> so I plan ti play arund with that
[01:29:37] <pink_vampire> morning!
[01:30:00] <XXCoder> hey
[01:34:44] <anomynous> learning guitar is like finger juggling. :D
[01:34:47] <anomynous> morning
[01:35:12] <Jymmm> um, no comment.
[01:36:33] <Jymmm> Wood boiler prices http://advancedcomfortsystems.com/econoburn.html
[01:41:50] <anomynous> Jymmm, totally off-topic? =)
[01:42:27] <anomynous> you could use router the cut the guitar profile or the hole in the middle or cut electric guitar frame :)
[01:43:40] <XXCoder> make wood boiler with cnc router
[01:44:15] * Jymmm tosses tree on cnc router and begins to carve boiler!
[01:46:42] <anomynous> arent those burners?
[01:47:03] <XXCoder> it makes burnable gas from wood
[01:47:54] <XXCoder> part of it does anyway, to recover as much energy from wood as possible
[01:48:04] <XXCoder> not too sure exactly
[01:48:43] <anomynous> isnt that kind of same as if it had secondary and tertiary air intake? :D
[01:55:13] <Jymmm> XXCoder: The 'wood gas' is produced when wood is burned at hot temperatures. it accoutns for 60% of the energy in wood.
[01:55:29] <XXCoder> pretty major
[01:56:02] <Jymmm> XXCoder: The air is super heated which allows the the secondary burners to (in essense) ignite or burn the wood gas.
[01:56:30] <anomynous> http://hotstovedeals.blogspot.fi/2009/07/primary-air-secondary-airairwash.html :D such comlicated thing to burn wood
[01:56:54] <Jymmm> XXCoder: When wood gas is not combused properly, it leaves creosite and over nasties
[01:57:01] <Jymmm> other*
[01:57:11] <XXCoder> fun. so whats your plan
[01:57:23] <XXCoder> by one of those so you dont have creosie problem?
[01:57:26] <XXCoder> *buy
[01:58:06] <Jymmm> XXCoder: No/maybe, not creosite, but radiant floor heating, but use wood boiler as primary, and propane as backup
[01:58:33] <Jymmm> XXCoder: No more burning wood or open flame indoors.
[01:58:47] <XXCoder> you dont need to ding me each time :P
[01:59:08] <Jymmm> XXCoder: No more watching the heat pump just suck the electricity inefeeciantly.
[01:59:47] <Jymmm> XXCoder: But it's all going to come down to the wood boiler itself
[01:59:48] <anomynous> Jymmm, do you have your own logs?
[01:59:57] <anomynous> or do you buy them
[01:59:58] <Jymmm> anomynous: As in wood? yes.
[01:59:59] <XXCoder> yeah it would take over for certain temp range below heat pump
[02:00:18] <Jymmm> anomynous: Buy wood, but it's far cheaper than propane
[02:00:33] <anomynous> ah... i thought you might make your own logs
[02:01:16] <XXCoder> can burn wood chips from your machine too
[02:01:18] <Jymmm> anomynous: Almond wood has 32.9M BTUs and goes for about $240 cord/delivered
[02:01:26] <XXCoder> theres special equipment to turn chips to "logs"
[02:01:33] <XXCoder> lemme find it
[02:01:41] <anomynous> whats btu and whats cord?
[02:01:42] <anomynous> :D
[02:01:57] <Jymmm> cord = 128 cubic feet
[02:02:06] <archivist> british thermal units
[02:02:09] <Jymmm> 8ft x 4ft x 4ft
[02:02:34] <anomynous> XXCoder, chipper?
[02:02:46] <XXCoder> https://woodgears.ca/reader/alois/press.html
[02:03:10] <Jymmm> XXCoder: If I want ecobricks, they're $2.99 for 6 (20.4 lbs)
[02:03:26] <XXCoder> they designed it to use up chips they make making stuff with manual tools, but cnc chips will work for it too
[02:03:49] <Jymmm> XXCoder: http://www.tractorsupply.com/tsc/product/redstone-wood-fuel-pack-of-6
[02:04:31] <XXCoder> I know that exists, but what I linked is great way to use up chips you make with wood projects
[02:04:37] <anomynous> wouldnt it be fun to use this? https://www.youtube.com/watch?v=bKyBEAtYfIs
[02:04:45] <anomynous> ;D
[02:04:57] <Jymmm> XXCoder: I'm in the forest, no need =)
[02:04:59] <XXCoder> so basically this machine shits wood
[02:05:12] <XXCoder> and its free once machine is made
[02:05:21] <Jymmm> XXCoder: My outdoor xmas trees are 100ft tall =)
[02:05:27] <XXCoder> nice
[02:06:03] <XXCoder> city I live in is one of earliest west settlement so it used to have tons of big trees
[02:06:11] <XXCoder> still some left but largely cut down
[02:06:25] <XXCoder> Fort Tacoma
[02:06:38] <Jymmm> those are pellets, they have pellet making machine on ebay
[02:07:12] <XXCoder> funny because I moved from vancouver which IS oldest west settlement, and school I graduated from is built right in second Fort Vancouver site.
[02:07:25] <XXCoder> first one was burned down by native americans
[02:07:39] <Jymmm> rightly so!
[02:07:41] <Jymmm> lol
[02:07:47] <XXCoder> heh
[02:08:13] <XXCoder> anyway its because of that fact that each time school builds or demos building they have t o check over site for artifacts
[02:08:14] <Jymmm> XXCoder: Now, find my a DIY wood boiler running 5+ years and 99% effeciant =)
[02:08:29] <XXCoder> 5+ years a log? sure heh
[02:08:53] <Jymmm> No, just the design running for 5+ years
[02:09:06] <Jymmm> not like a v1.2, 1.3, 1.4 etc
[02:11:24] <XXCoder> https://woodgears.ca/reader/alois/26-b.jpg wood poop
[02:15:42] <anomynous> how about burning turf
[02:15:54] <anomynous> its being sold as pellets also
[02:15:58] <anomynous> ?
[02:16:47] <XXCoder> I know some areas use peat
[02:16:56] <XXCoder> which isnt quite same, but turf directly? dunno
[02:18:30] <anomynous> they harvest turf here and burn it. In big heat burners that heat towns, but that turf can be unpelleted or big blocks :D Unpelleted needs a special burner that i think cannot be done at home. Pelleted turf could be burned at home
[02:19:26] <XXCoder> I wonder if they could evenually run out of turf
[02:19:29] <anomynous> https://fi.wikipedia.org/wiki/Turve#/media/File:Toppila_power_plant.JPG this thing runs on turf
[02:20:27] <XXCoder> ok
[02:21:21] <Contract_Pilot> Afternoon
[02:21:31] <XXCoder> night
[02:21:50] <Contract_Pilot> Well almost morning 12am
[02:22:05] <XXCoder> heh lost in time eh ;)
[02:22:17] <Contract_Pilot> Yea, Back has been killing me
[02:22:37] <Contract_Pilot> Upper back.
[02:24:02] <Contract_Pilot> Need to trade this harley off
[02:30:46] <pink_vampire> http://9gag.com/gag/aBYQ58D
[02:31:21] <pink_vampire> here is just 3AM.
[02:32:25] <XXCoder> soft surface is quite effective trap
[02:32:30] <XXCoder> cant jump high enough
[02:35:35] <pink_vampire> I need to extend my brade board
[02:37:44] <Contract_Pilot> your bat?
[02:38:11] <pink_vampire> no,,
[02:38:32] <pink_vampire> I have other stuff here..
[02:39:15] <pink_vampire> working on interface for 15 temp sensors
[02:41:00] <Deejay> moin
[02:43:28] <pink_vampire> morning :)
[02:57:45] <pink_vampire> there is a limit to the amount of sensors that I can connect in series? DS18B20??
[03:03:17] * archivist points at the data sheet
[03:12:25] <pink_vampire> archivist: theoretically you can connect a-lot of them.. but practically it's not working
[03:15:04] <archivist> phantom power or proper 5v
[03:19:20] <renesis> as if phantom power is this proper thing
[03:22:15] <archivist> would be better if the phantom power option allows for an external capacitor
[03:24:19] <renesis> coupling cap?
[03:24:36] <renesis> but then its not really phantom power so much as just a power supply
[03:25:59] <archivist> it takes its power from the serial line, it needs a larger cap so it can drive the pull up properly
[03:26:15] <archivist> in phantom/parasitic mode
[03:27:21] <enleth> or just use a 4-20 sensor
[03:27:47] <archivist> she wants to use many sensors
[03:28:31] <archivist> anyway with many they are in parallel not series
[03:28:47] <enleth> oh, by the way, are there 4-20 interfaces on any mesa board?
[03:30:36] <archivist> 4-20 is such an old standard, really stood the test of time
[07:25:15] <Contract_Pilot> A night with out backpain
[07:26:55] <XXCoder> a night without back pain or a night with out back pain? ;)
[07:27:06] <XXCoder> funny how space changes things.
[07:29:55] <enleth> it can be worse
[07:30:17] <enleth> Bob helped uncle Jack off the horse
[07:30:24] <enleth> bob helped uncle jack off the horse
[07:36:51] <ReadError> sigh
[07:37:05] <ReadError> got everything installed on jessie
[07:37:10] <ReadError> then realized it was sim only
[07:37:37] <XXCoder> well there is actual job of jacking horse off
[07:41:44] <_methods> wander off to get some coffee and this turns into the animal husbandry channel
[07:42:26] <SpeedEvil> yeah - it's off topic unless you use CNC for that.
[07:42:32] <XXCoder> funny how topic turns in channel eh
[07:42:33] <_methods> lol
[07:42:55] <XXCoder> cnc horse mastubator lol
[07:56:50] <MrSunshine> oh thats not a bad idea actualy!
[07:58:08] <MrSunshine> but not horse ... :P
[08:22:29] <Contract_Pilot> hahaha
[08:31:12] <SpeedEvil> If you can increase output a small percentage, by an objectively verifiable amount, then you could probably sell it to racing people.
[09:13:01] <malcom2073> SpeedEvil: Object, Verifiable, increase, and output are all optional terms when it comes to selling to racing people :P
[09:13:18] <malcom2073> Oh I scrolled up, horse racing
[09:13:19] <malcom2073> meh
[09:13:22] <malcom2073> Also: Ew.
[10:56:33] <ReadError> servo tuning wasnt as bad as I thought
[10:56:58] <ReadError> least on the bench, seems to hold position and correct
[11:01:44] <enleth> ReadError: did you strap it to the bench?
[11:02:41] <enleth> it seems to be a recurring motif here - someone goes off to tune their servo outside of the machine and quickly returns to warn others to restrain the servo
[11:02:53] <ReadError> lol
[11:03:02] <ReadError> leave it running and it jumps off?
[11:03:29] <enleth> ReadError: more like you accidentaly start it at full speed and it literally jumps up at you
[11:03:57] <enleth> even a small servo could very well injure someone that way
[11:06:42] <ReadError> ahh i could see that happening
[11:07:59] <archivist> even a plain induction motor direct on mains can move violently
[11:11:17] <pink_vampire> https://i.chzbgr.com/full/7482018048/h7350C090/
[11:11:19] <malcom2073> Plumbing strap ftw
[11:11:47] <malcom2073> Jymmm: My UPS is only a 2000W one, and from reading online, it doesn't seem like you can really use it as an inverter, they have pretty picky firmware
[11:27:36] <Tom_itx> malcom2073, My UPS delivers ontime.
[11:28:43] <malcom2073> har har
[11:29:23] <Tom_itx> ^^ more or less my scrollback bookmark :)
[11:49:08] <Jymmm> malcom2073: hack it!!!
[11:49:24] <malcom2073> Jymmm: It looks brand stinkin new inside, but it doesn't turn on. Manual indicates it may not without batteries
[11:49:44] <Jymmm> malcom2073: You already knew that =)
[11:50:37] <malcom2073> Looks like the batteries are tied directly into the output of the rectifier
[11:50:44] <malcom2073> Which is also how it charges them
[11:50:50] <malcom2073> So, it really has zero charging logic
[11:50:52] <malcom2073> could be hackable
[11:51:19] <Jymmm> Fine, if you're not gonna hack it, then LICK IT!!!
[11:51:26] <malcom2073> Mmmm spicy rectifiers
[12:35:48] <malcom2073> I wonder if I could use a DCDC to fool the UPS into thinking the batteries were always half full
[12:38:26] <SpeedEvil> malcom2073: it typically may have a relay to disconnect the input
[12:38:49] <SpeedEvil> malcom2073: It will in many cases on boot turn off the input relay, and turn on the inverter, as a test to see if everything works
[12:39:06] <SpeedEvil> If there are no batteries - well - ...
[12:39:44] <Jymmm> malcom2073: How many batteries does it take? 8 ?
[12:41:02] <SpeedEvil> Also.
[12:41:12] <SpeedEvil> You can get batteries for testing from a car salvage yard
[12:41:41] <SpeedEvil> Ask what they pay for car batteries (they buy for the lead) then offer a modest premium
[12:45:24] <Jymmm> malcom2073: If it's anything like the 2KVA APC UPSes I had, You'll find there are two harnesses, each one goes to four batteries. Each harness is wired in a series/parallel for 24V ((2x12V) + (2x 12V)), then internally those two harnesses are wired for 48V.
[12:46:26] <malcom2073> Jymmm: Looks like four, two of the twofers that my 1500 takes
[12:46:35] <malcom2073> Wired for 12v each, 24v series internally
[12:46:38] <malcom2073> Which is odd
[12:46:50] <malcom2073> because the extra battery input says 48v, so you may be right, this one is supposed to take quad battery packs
[12:47:16] <Jymmm> and you need two "quad packs" ?
[12:47:21] <malcom2073> SpeedEvil: This all came about, because I may be picking up a pallet of coule year old unused gel cell batteries
[12:48:40] <SpeedEvil> malcom2073: it's not completely unlikely they are junk if they've not been charged
[12:49:00] <SpeedEvil> If they are under 11V or so terminal, they are almostr certainly junk
[12:49:08] <ReadError> can a MESA wizard sanity check my setup
[12:49:13] <ReadError> 7I76E + 7I76
[12:50:19] <malcom2073> SpeedEvil: Entirely possible
[12:50:24] <malcom2073> even likely
[12:56:19] <SpeedEvil> they are at the least recyclable for not-quite-zero money
[13:01:54] <neverbuya_subaru> anyone here use a lot of torque wrenches?
[13:02:14] <Tom_itx> nope, just one at a time
[13:02:17] <neverbuya_subaru> :P
[13:02:29] <neverbuya_subaru> im hoping someone here owns a snapon tech angle
[13:02:36] <neverbuya_subaru> and also the older style w/ a dial indicator
[13:02:40] <Tom_itx> snapon but not a fancy one
[13:02:40] <neverbuya_subaru> just want opinions :p
[13:02:49] <neverbuya_subaru> http://i.ebayimg.com/00/s/NTMzWDgwMA==/z/m1gAAOSwp5JWZGxt/$_27.JPG
[13:02:51] <neverbuya_subaru> i came across this
[13:03:00] <neverbuya_subaru> it looks pretty accurate?
[13:03:34] <Tom_itx> should be unless somebody dropped it
[13:04:09] <neverbuya_subaru> wheres the ratcheting head?
[13:04:29] <Tom_itx> if it's ratchet it's on the bottom
[13:04:37] <Tom_itx> probably 1/2"
[13:04:49] <neverbuya_subaru> bottom where?
[13:04:56] <neverbuya_subaru> on the very left side?
[13:04:59] <Tom_itx> the side not shown
[13:05:01] <Tom_itx> yes
[13:05:04] <neverbuya_subaru> hm
[13:05:05] <malcom2073> Jymmm: Yep, 48v
[13:05:08] <neverbuya_subaru> that must be awkward
[13:05:09] <neverbuya_subaru> to use..
[13:05:33] <neverbuya_subaru> http://www.ebay.ca/itm/CDI-TORQUE-WRENCH-1002CF3-3-8-DRIVE-5-100-LBS-/130311688772
[13:05:37] <neverbuya_subaru> im looking at this one
[13:05:41] <neverbuya_subaru> all my torquew rencvhes are click type
[13:05:43] <neverbuya_subaru> and i dont trust em at all
[13:05:55] <neverbuya_subaru> i was thinking of making a testing jig for it
[13:06:03] <neverbuya_subaru> a known beam with a known twist
[13:06:16] <neverbuya_subaru> and using mechanics of materials equations to calibrate
[13:06:21] <Tom_itx> mine is a click snapon
[13:06:34] <neverbuya_subaru> those rely on a spring mechanism
[13:06:37] <neverbuya_subaru> i dont trust =/
[13:06:39] <neverbuya_subaru> cause springs relax
[13:06:47] <malcom2073> neverbuya_subaru: Are you zeeshan?
[13:06:51] <neverbuya_subaru> malcom2073: yes
[13:06:53] <malcom2073> K figured :)
[13:06:57] <neverbuya_subaru> this is my new perm name :)
[13:07:01] <Tom_itx> i always set it to a very low setting during storage
[13:07:34] <neverbuya_subaru> yes same here
[13:07:40] <malcom2073> neverbuya_subaru: calibrate it once a year
[13:07:51] <neverbuya_subaru> i guess i'd trust it more if i could get consistent results from 2 diff wrenches
[13:07:53] <Tom_itx> you should go back to zeeshan by year end
[13:09:20] <malcom2073> I saw a good video on the consistancy of torqing bolts, basically: There's no consistancy. YOu amke
[13:09:24] <malcom2073> You make sure your tool is accurate, and trust
[13:10:26] <Tom_itx> http://www.wikihow.com/Calibrate-a-Torque-Wrench
[13:10:36] <Tom_itx> in case you needed help :)
[13:11:11] <ReadError> zeeshan help me fellow efneter ;(
[13:11:47] <neverbuya_subaru> ReadError: whats wrong
[13:11:57] <ReadError> 7I76E + 7I76
[13:12:07] <ReadError> I dont understand all this MESA stuff yet
[13:12:21] <neverbuya_subaru> you have 2 7i76s?
[13:12:35] <ReadError> nah i ordered the 7i76e and 7i76
[13:12:48] <ReadError> I need 4 stepgen and 2 servos+encoders
[13:13:03] <neverbuya_subaru> o
[13:13:08] <ReadError> and about 6 generic gpio output
[13:14:34] <Tom_itx> huge skyscraper in Dubai is on fire atm
[13:14:46] <neverbuya_subaru> doh
[13:14:51] <neverbuya_subaru> ReadError: so whats the problem :P
[13:15:02] <ReadError> neverbuya_subaru, i just dont know of that combo is workable
[13:15:14] <neverbuya_subaru> ReadError: i was under the impression the the 7i76
[13:15:17] <neverbuya_subaru> had 5 encoder inputs
[13:15:19] <ReadError> i got the 26pin -> db25 cable
[13:15:22] <Tom_itx> you may have to make a bitfile for it
[13:15:41] <neverbuya_subaru> do your servos need step dir input
[13:15:44] <neverbuya_subaru> or analog
[13:15:54] <ReadError> neverbuya_subaru, they are digital, i think
[13:15:58] <ReadError> i know they take step/dir
[13:16:03] <neverbuya_subaru> can't think
[13:16:04] <ReadError> but theres a bunch of other pins
[13:16:05] <neverbuya_subaru> you should know that
[13:16:08] <neverbuya_subaru> its important
[13:16:24] <neverbuya_subaru> bust out the wiring diagram page of your motor driver
[13:16:30] <neverbuya_subaru> can you post that here?
[13:16:40] <ReadError> sec
[13:17:13] <MikkoP> Hey!
[13:17:19] <MikkoP> Happy new year :D
[13:18:33] <ReadError> · Two single-ended analog inputs, +/-10 volt logic: Analog IN1 and Analog IN2.
[13:18:34] <ReadError> Support 0-10, +/-5, or 0-5 volt logic as well. Can be wired together to create one differential ana-
[13:18:34] <ReadError> log input. Analog velocity or position command signal. Note: the analog inputs are currently not
[13:18:34] <ReadError> supported by the Si ProgrammerTM software.
[13:18:45] <ReadError> http://www.applied-motion.com/sites/default/files/hardware-manuals/SV7_HardwareManual_920-0012.pdf
[13:18:53] <ReadError> seems it supports both, but ive never used servos before
[13:19:37] <neverbuya_subaru> i don't know the reason for this
[13:19:46] <neverbuya_subaru> but ive been told running analog is better
[13:19:51] <neverbuya_subaru> vs step dir
[13:19:54] <ReadError> nothing has shipped yet so I want to get the mesa stuff figured out ;)
[13:20:02] <neverbuya_subaru> but i wish sojmeone can give a concrete answer about that.
[13:20:07] <ReadError> well nothing from MESA has shipped*
[13:20:11] <ReadError> i have the servos+drives
[13:20:13] <neverbuya_subaru> if youre running servos
[13:20:22] <neverbuya_subaru> you should get the 7i77 + 5i25 or 6i25
[13:20:30] <neverbuya_subaru> because it comes with 6 channels of encoder inputs
[13:20:35] <neverbuya_subaru> and 6 analog outs
[13:20:36] <ReadError> i would like to stay ethernet though
[13:20:52] <ReadError> I have a crappy EEEpc that runs with great latency
[13:21:08] <ReadError> and dont want to stand up another box just for a pci card
[13:22:01] <neverbuya_subaru> i really dont know by step/dir is not as good
[13:22:07] <neverbuya_subaru> to make it is a digital signal
[13:22:10] <neverbuya_subaru> so it should be better.
[13:22:18] <neverbuya_subaru> less suspectible to noise unlike the analog signal
[13:22:27] <neverbuya_subaru> but at the same time, the analog signal is differential so its pretty immune to noise
[13:22:54] <neverbuya_subaru> your drives take step/dir
[13:23:02] <neverbuya_subaru> so i can see the 7i76e working.
[13:23:05] <ReadError> i cant think of any reason analog would be better
[13:23:23] <ReadError> step/dir are differential inputs also
[13:23:33] <neverbuya_subaru> lemme see if the 7i76e
[13:23:37] <neverbuya_subaru> is differential step/dir
[13:24:02] <neverbuya_subaru> All step and direction outputs are buffered 5V signals that can drive 24 mA. All outputs support differential mode to reduce susceptibility to noise.
[13:24:03] <neverbuya_subaru> awesome
[13:24:12] <neverbuya_subaru> so basically in your pdf
[13:24:20] <neverbuya_subaru> if you go to page 28
[13:24:37] <neverbuya_subaru> Connecting to Indexer with Differential Outputs (Many High Speed Indexers have Differential Outputs)
[13:24:49] <neverbuya_subaru> that's how you'd wire your 7i76e card to your db25 conenctor
[13:24:54] <ReadError> yea thats what i was planning on doing
[13:25:02] <neverbuya_subaru> so what is the problem!
[13:25:02] <ReadError> i was just unsure about daughter card choice
[13:25:14] <ReadError> i know im going with 1x 7i76e
[13:25:15] <neverbuya_subaru> you want the 7i76e
[13:25:21] <neverbuya_subaru> 7i76 does not have encoder input
[13:25:25] <ReadError> yea but I need a daughter card
[13:25:28] <ReadError> for the other steppers
[13:25:37] <neverbuya_subaru> oh its a servo + stepper system
[13:25:38] <neverbuya_subaru> :P
[13:25:42] <ReadError> ya
[13:25:47] <neverbuya_subaru> why do you need a daughter card though
[13:25:49] <ReadError> important bits are servo
[13:25:54] <neverbuya_subaru> you have 6 step/dir
[13:25:56] <neverbuya_subaru> on the 7i76e
[13:25:58] <ReadError> because im 1 stepper over my limit
[13:26:02] <ReadError> it says 5 ?
[13:26:05] <neverbuya_subaru> is it?
[13:26:07] <neverbuya_subaru> lemme check :P
[13:26:07] <ReadError> or thought it did anyways
[13:26:16] <ReadError> tellin you, this mesa stuff is super confusing
[13:26:20] <neverbuya_subaru> damn it its 5 :P
[13:26:47] <neverbuya_subaru> its confusing inthe beginning
[13:26:49] <neverbuya_subaru> but when you figure it out
[13:26:53] <neverbuya_subaru> you slap yourself cause its easy :P
[13:28:14] <ReadError> cool thanks for the help, hopefully those 2 will get me going nicely
[13:28:15] <neverbuya_subaru> so basically youre talking about expansion card
[13:28:18] <neverbuya_subaru> for 7i76e.
[13:28:21] <ReadError> yea
[13:28:23] <neverbuya_subaru> im sure there is a cheaper alternative
[13:28:25] <neverbuya_subaru> than the 7i76
[13:28:28] <ReadError> i thas the 2x 26 pin
[13:28:29] <neverbuya_subaru> cause you only need 1 more
[13:28:42] <ReadError> http://store.mesanet.com/index.php?route=product/product&path=83_87&product_id=121
[13:28:44] <neverbuya_subaru> and like tom was saying
[13:28:50] <neverbuya_subaru> youre going to need a custom config file
[13:28:50] <ReadError> theres that
[13:28:56] <neverbuya_subaru> to let it know that you got an expansion card
[13:29:03] <ReadError> but i plan on needing more generic GPIO later
[13:29:09] <ReadError> so I kinda wanted to over allocate
[13:29:10] <neverbuya_subaru> they dont make something thqat uses smart serial?
[13:29:30] <neverbuya_subaru> One RS-422 interface is provided for I/O expansion via a serial I/O daughtercard.
[13:29:32] <neverbuya_subaru> nm
[13:30:07] <ReadError> i may put a servo on my Z axis too
[13:30:15] <ReadError> so figured i should keep some stuff open for that
[13:30:24] <neverbuya_subaru> what are you using for the "parent" card
[13:30:42] <ReadError> 7i76e
[13:30:46] <neverbuya_subaru> no
[13:30:50] <neverbuya_subaru> i mean like 5i25 or 6i25
[13:31:05] <ReadError> hmm i was under the impression the 'e' one was standalone
[13:31:17] <ReadError> and the 7i76 needed a parent
[13:31:47] <neverbuya_subaru> i dont know =/
[13:31:54] <neverbuya_subaru> usually with 7i77
[13:31:57] <neverbuya_subaru> you use a 5i25 or 6i25
[13:32:11] <neverbuya_subaru> but it has no ethernet interfgace
[13:32:53] <ReadError> The 7I76E ia a remote FPGA card with Ethernet interface designed for interfacing up to 5 Axis of step &dir step motor or servo motor drives and also provides a spindle encoder interface, isolated analog spindle speed control and 48 isolated I/O points for general purpose field I/O use.
[13:33:01] <ReadError> it sounds like its standalone anyways
[13:33:15] <ReadError> or has its own FPGA
[13:33:24] <neverbuya_subaru> ya
[13:33:32] <neverbuya_subaru> how do you communicate with it from the comp?
[13:33:35] <neverbuya_subaru> using your ethernet card?
[13:33:35] <neverbuya_subaru> :p
[13:33:46] <neverbuya_subaru> thats cool
[13:33:50] <ReadError> yea
[13:33:55] <neverbuya_subaru> cause that means
[13:34:00] <neverbuya_subaru> you could technically use a rasp pi 2
[13:34:05] <neverbuya_subaru> and use the 7i76e with it
[13:34:11] <neverbuya_subaru> i always thought 7i76e was 7i76 w/ encoder
[13:34:13] <ReadError> i was thinking about using a BBB and going full MAKER
[13:34:14] <neverbuya_subaru> but i am wrong
[13:34:14] <ReadError> ;p
[13:34:21] <neverbuya_subaru> thats a cool project :)
[13:34:22] <ReadError> but i have this atom eeepc laying around
[13:34:48] <ReadError> runs a 6000 servo thread
[13:35:14] <neverbuya_subaru> i keep reading this thing
[13:35:22] <neverbuya_subaru> about "analog is better when closing the loop in the control"
[13:35:32] <neverbuya_subaru> "and step/dir if loop is closed in the drive"
[13:35:37] <neverbuya_subaru> they don't mention what loop it is
[13:35:40] <neverbuya_subaru> and why.
[13:35:41] <neverbuya_subaru> :p
[13:35:49] <ReadError> hmm so analog AND step/dir?
[13:36:08] <ReadError> I cant think of any reason why analog would be better offhand....
[13:38:23] <neverbuya_subaru> me either
[13:39:00] <neverbuya_subaru> cost ?
[13:39:00] <neverbuya_subaru> :p
[13:40:50] <ReadError> seems more complicated http://www.theamphour.com/wp-content/uploads/2011/03/bob_widlar_digital1.jpg
[13:41:00] <neverbuya_subaru> rofl
[13:41:19] <neverbuya_subaru> to me digital seems better
[13:41:27] <neverbuya_subaru> cause you could configure them to run independentaly
[13:41:33] <neverbuya_subaru> and use some sort of fieldbus wiring
[13:41:40] <neverbuya_subaru> the wiring would be possibly shorter
[13:41:46] <ReadError> i was pretty impressed spinning these things around on the bench
[13:41:47] <neverbuya_subaru> and easier to route
[13:41:48] <ReadError> so smooth
[13:42:03] <ReadError> not coggy and vibby like steppers
[14:30:21] <JT-Shop> limit/home switches have twisted pair shielded cable now... down to one sserial error
[14:32:58] <pink_vampire> Awwwww http://1.bp.blogspot.com/-QqOEE3iBUAU/UPSDAgVFVQI/AAAAAAAAAEE/X4RTLsTgKkA/s1600/baby-kangaroo.jpg
[15:55:55] <JT-Shop> hmm, I just got the last limit/home switch shield grounded and homed the BP with NO errors
[15:57:39] <pink_vampire> what do you mean..
[15:58:13] <neverbuya_subaru> jt nice
[15:59:01] <JT-Shop> yea!
[16:00:53] <JT-Shop> I think I'll load 2.7 back in
[16:08:11] <JT-Shop> the BP RUNS in 2.7.3! Yippee
[16:10:30] <JT-Shop> still need to move some relays around to clean up the cabinet but other than that I'm done rewiring the BP
[16:15:14] <Tom_itx> at least you'll know what to expect now
[16:15:40] <Tom_itx> so shielding the limits fixed it?
[16:16:04] <JT-Shop> I never know what to expect lol
[16:16:06] <JT-Shop> at least I can move on with the probe
[16:16:06] <JT-Shop> seems that way
[16:16:31] <JT-Shop> the XY limits wiring ran very close to the drives and they are open card type
[16:17:05] <Tom_itx> i had similar issues on the sherline as small as it is...
[16:17:14] <Tom_itx> shielded everything
[16:17:34] <JT-Shop> you running servos on the sherline?
[16:17:40] <Tom_itx> no
[16:17:42] <Tom_itx> steppers
[16:18:04] <Tom_itx> but it runs 2.7 ok
[16:18:13] <JT-Shop> so does my plasma table
[16:18:54] * JT-Shop heads out to meet the biker gang for some early dinner
[16:21:33] <jdh> road bike?
[16:27:17] <JT-Shop> big bikes
[16:27:48] <neverbuya_subaru> man this movie
[16:27:52] <neverbuya_subaru> "play the big short"
[16:27:55] <neverbuya_subaru> really scary.
[16:28:03] <neverbuya_subaru> financial system is really that screwed
[16:28:12] <Tom_itx> worse
[16:28:49] <neverbuya_subaru> the movie does a good job of explaining the crash of 2008
[16:28:58] <neverbuya_subaru> and the people that knew it was coming 2 years before it happened
[16:28:59] <neverbuya_subaru> and how they knew
[16:29:37] <neverbuya_subaru> and how CDOs have been replaced by "bespoke tranche opportunity" (reason for collapse)
[16:30:24] <jdh> it obviously works fine. they are still rich.
[16:30:28] <neverbuya_subaru> yep
[16:30:32] <neverbuya_subaru> only one guy got arrested
[16:30:33] <neverbuya_subaru> apparently
[16:30:37] <neverbuya_subaru> so many commited fraud
[16:30:40] <neverbuya_subaru> the gov is involved in it too
[16:30:52] <neverbuya_subaru> in the end 5 trillion dollars were lost from pension 401k savings etc
[16:31:00] <neverbuya_subaru> 5 trillion!
[16:31:08] <Tom_itx> as long as there is one fall guy everyone else is ok
[16:31:37] <neverbuya_subaru> i find this interesting
[16:31:46] <neverbuya_subaru> the guy know analyzed the data and caught the bubble 2 years before it happened
[16:31:55] <neverbuya_subaru> is now investing in only one thing. water
[16:32:03] <neverbuya_subaru> :p
[16:32:21] <neverbuya_subaru> he btw made 289 billion dollars from the collapse :p
[16:33:45] <neverbuya_subaru> i think its 2.89
[16:33:47] <neverbuya_subaru> whoops :)
[16:33:57] <neverbuya_subaru> Though he suffered an investor revolt before his predictions came true, Burry earned a personal profit of $100 million and a profit for his remaining investors of more than $700 million.[3] Scion Capital ultimately recorded returns of 489.34 percent (net of fees and expenses) between its November 1, 2000 inception and June 2008. The S&P 500 returned just over two percent over the same period.[3]
[16:34:17] <neverbuya_subaru> jesus
[16:34:17] <neverbuya_subaru> :p
[16:34:34] <malcom2073> Yep. Well for every winner, there are losers, and for every loser, there are winners
[16:34:42] <JT-Shop> http://gnipsel.com/images/GL1800/GL1800%2001.jpg
[16:34:58] <neverbuya_subaru> is that you jt
[16:35:00] <jdh> some people need engines I guess
[16:35:04] <JT-Shop> aye
[16:35:04] <neverbuya_subaru> youre living the life
[16:35:05] <neverbuya_subaru> :D
[16:35:14] <JT-Shop> me and the missus
[16:35:20] <jdh> I got 6359 miles this year
[16:35:32] <neverbuya_subaru> jdh is your lathe done?1
[16:35:45] <jdh> haven't even seen it in months
[16:35:47] <JT-Shop> got my bike computer on finally
[16:36:00] <JT-Shop> still trying to find good roads to ride on
[16:36:09] <JT-Shop> http://gnipsel.com/images/GL1800/2009%20GL1800.jpg
[16:36:24] <jdh> nice harley
[16:36:30] <JT-Shop> lol
[16:36:32] <jdh> :)
[16:36:41] <JT-Shop> the harley's ride in the back
[16:36:51] <jdh> keeps them from flinging oil?
[16:37:02] <JT-Shop> yep and they are too loud
[16:37:27] <malcom2073> heh
[16:40:50] <JT-Shop> jdh: didn't like the giant comfort seat so got a Serfas seat similar to my mountain bike
[16:41:31] <jdh> comfort seat is generally uncomfortable for more than a few miles
[16:44:51] <JT-Shop> you wear padded pants?
[16:45:32] <JT-Shop> the probe causes a linuxcnc shutdown... guess I need to ground the shield
[16:46:39] <JT-Shop> yep the shield is not grounded to the probe body
[16:51:44] <Tom_itx> should it be?
[16:53:11] <JT-Shop> no, only on the other end
[18:27:43] <Deejay> gn8
[18:28:14] <Deejay> bye
[18:39:27] <Duc> https://www.youtube.com/watch?v=ZhTSiGZkWO4&feature=youtu.be Enjoy guys
[19:37:40] <andypugh> These things are useful for far more than is obvious: http://www.ebay.co.uk/itm/C10-ER11M-100L-Collet-Chuck-Holder-Straight-Shank-for-CNC-Milling-Lathe-10mm-Dia-/231538795265?hash=item35e8c9a301:g:uM0AAOSwqu9VNhr6
[19:39:44] <t12> ?
[19:40:02] <DaViruz> don't keep us hanging, do tell!
[19:40:12] <andypugh> Making drill longer, for example:
[19:40:13] <andypugh> https://picasaweb.google.com/108164504656404380542/Holbrook#6234621339387054306
[19:40:39] <t12> cool
[19:40:40] <t12> cheap too
[19:41:36] <andypugh> Yeah, worth having around at that prive for holdiogn taps and drill when access is awkward. Of course you need the collets too.
[19:42:13] <andypugh> This one is even cheaper http://www.ebay.co.uk/itm/New-C10-ER11A-100L-Collet-Chuck-Holder-CNC-Milling-Extension-Rod-Straight-Shank/291628111498?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20140122125356%26meid%3Dd9fffb9b67d640b19a63a27ddb43253d%26pid%3D100005%26rk%3D5%26rkt%3D6%26sd%3D231538795265
[19:43:53] <andypugh> Got the servo motor mounted: https://picasaweb.google.com/108164504656404380542/Holbrook#6234621374669881410
[19:44:09] <andypugh> See anything unusual?
[19:45:05] <DaViruz> chain drive?
[19:45:09] <andypugh> Yes
[19:45:18] <andypugh> May be a mistake, but I wanted to try it
[19:45:43] <andypugh> It’s a camchain
[19:45:48] <DaViruz> how will you tension it?
[19:45:59] <andypugh> The motor slides up and down.
[19:46:06] <DaViruz> oh.
[19:46:51] <andypugh> Though I might use a camchain tensioner guide, like it came with. (it’s a camchain)
[19:47:17] <DaViruz> i'm guessing that's what the plate on the er11 collet holder picture is about?
[19:47:26] <andypugh> Yes.
[19:47:55] <andypugh> It’s not a small motor, is it?
[19:48:01] <DaViruz> one problem might be that cam tensioner guides are usually supposed to be used for a single direction of rotation
[19:48:37] <DaViruz> camchain*
[19:48:39] <andypugh> Yes, but the force reverses every lobe. Very much so on a single-cylinder.
[19:48:40] <CaptHindsight> http://hackaday.com/2015/12/30/sourcing-your-cnc-tools-in-2016-buy-them/ LOL
[19:48:51] <DaViruz> that's true
[19:49:13] <DaViruz> will the chain compartment be oil filled?
[19:50:23] <DaViruz> and no, the motor looks quite hefty. i'm guessing 2kW-ish?
[19:51:22] <andypugh> It’s only 1kW.
[19:51:45] <andypugh> But I think it has a fair amount of headroom at that
[19:53:07] <andypugh> Yes, part of the reason I am using a chain is that the headstock needs an oil sump at that point, so I am keeping the oil in the casting, and feeding the return oil to the Z-azis thrust bearings and drive chain. It feels “right” for a 1960s machine.
[19:53:15] <DaViruz> i'm quite impresse with that casting of yours. i don't think i'd dare try it
[19:53:15] <Erant> Ugh. I need a new Z lead screw. Current one wasn't meant to be any kind of accurate, and it shows.
[19:53:29] <Erant> CaptHindsight: I saw that. Wanted to comment that they're not showing mills, but routers...
[19:53:43] <andypugh> Erant: If you can measure the error, you can make a compensation file.
[19:54:24] <CaptHindsight> Erant: it's ok, the author doesn't know the difference
[19:54:54] <andypugh> CaptHindsight: I am unclear whether they are saying that LinuxCNC is the past, and best ignored, or not.
[19:55:17] <t12> why would chain be a mistake
[19:56:16] <andypugh> t12: Well, I think it’s a good idea, which is why I chose to use it. But nobody else ever has. Perhaps I will find out what they know that I don’t.
[19:56:16] <t12> i believe i have won vs the fpga
[19:56:19] <t12> https://www.dropbox.com/s/lqqd32u9eacaq5h/2016-01-01%2001.28.31.mp4?dl=0
[19:57:16] <andypugh> One concern is that I have no idea if I can shorten the chain.
[19:57:39] <DaViruz> on an opposite note, a recently saw a bicycle with a toothed belt instead of a chain
[19:57:44] <malcom2073> andypugh: linuxcnc is not for the everyday user
[19:57:47] <malcom2073> it's for techies
[19:57:48] <t12> i've seen a bunch of those around here
[19:57:49] <DaViruz> i was a bit fascinated with it
[19:57:50] <t12> yes
[19:57:54] <t12> people who cant get their pantleg oily
[19:58:25] <Erant> andypugh: Meh, there's more than just the error. It doesn't have enough room for two thrust bearings + axial bearing + collet + pulley. Instead, it only has one thrust bearing. I was hoping the weight of the head would be enough for drilling and plunging operations, but it's not.
[19:58:52] <t12> no idea if you can shorten it due to lack of chain tools?
[19:58:53] <Erant> So I sort of need to fix that anyway, and while I'm at it I might as well replace it with a leadscrew. It has a standard thread screw right now.
[19:59:00] <t12> or lack of master link or something
[19:59:25] <DaViruz> i don't think i ever looked closely at those small engine cam chains
[19:59:27] <andypugh> t12: I don’t even know what the chain pins are in a Hi-Vo chain
[19:59:52] <Tom_itx> andypugh, looks like you're making good progress
[20:00:01] <Tom_itx> those collet extensions are quite handy
[20:00:05] <andypugh> But I have lots of spare chain to take pins out of.
[20:01:55] <PetefromTn_> Happy New Years everyone
[20:02:02] <t12> happy nye!
[20:02:13] <PetefromTn_> :D
[20:04:16] <andypugh> I rather overlooked the new year. Though it was a good day to work late and be noisy, as most folk are not trying to sleep.
[20:05:24] <Tom_itx> do they bead blast those castings to remove any sand trapped inside?
[20:05:46] <Tom_itx> or do they come out pretty clean as is
[20:05:52] <CaptHindsight> t12: nice old scope, I have a 620 sitting next to me
[20:06:16] <os1r1s> CaptHindsight What size vise do you use on your g0704?
[20:07:00] <andypugh> Tom_itx: It had no sand at all on it, but it had some iron flash where there had been cracks in the cores.
[20:07:13] <andypugh> I don’t know what he actually does to clean them.
[20:07:21] <CaptHindsight> os1r1s: I don't have a G0704 http://www.grizzly.com/products/Drill-Mill-with-Stand/G0704
[20:07:25] <t12> this scope has been pretty good to me
[20:07:32] <Tom_itx> they're clean by the time you get them then
[20:07:32] <t12> i wish it didnt take like 90secs to boot
[20:08:00] <CaptHindsight> t12: well you want the oscillators to warm up
[20:08:21] <andypugh> I recently found out how they make sure there is no sand in the oil cooling channels in pistons after casting. They don’t use sand, they use salt cores and wash them out. Cunning!
[20:08:30] <t12> usually i'm doing ezmode stuff on it
[20:08:38] <t12> i have used the gpib control nicely before
[20:09:06] <CaptHindsight> water soluble casting materials for the win
[20:09:38] <t12> i have won vs the fpga, now lets see if i win vs the mosfets
[20:15:45] <CaptHindsight> os1r1s: I use Kurt and Shars viceses'ss http://imagebin.ca/v/2RuHAsYVLA7N
[20:17:26] <andypugh> Tim eto wish you all a happy new year, and log off.
[20:35:16] <malcom2073> neverbuya_subaru ping
[20:35:38] <malcom2073> zeeshan
[20:37:30] <malcom2073> When I'm designing a frame, and I do a FEA, assuming I don't botch up the configuration, and it says that the maximum deflection of the spindle would be 0.03mm, would that be equivalant to saying that under the cutting force I specified (50lbs), the machine would be within 0.03mm tolerance, ignoring things like chatter, and physics?
[20:37:54] <malcom2073> Lotta assumptions, but I'm trying to figure out what I should be aiming for in terms of deflection when it comes to choosing frame tubing sizes and reinforcement locations
[20:42:56] <Contract_Pilot> Hey all happy new years eve
[20:43:33] <malcom2073> Happy new years Contract_Pilot!
[20:44:06] <JT-Mobile> Happy New Year
[20:45:07] <Contract_Pilot> I need to get my 12X36 lathe up ASAP...
[20:45:27] <Contract_Pilot> My Brain is Fried...
[20:51:14] <neverbuya_subaru> hi
[20:51:45] <neverbuya_subaru> malcom2073: be careful with fea
[20:51:58] <malcom2073> Oh I'm being very careful
[20:51:59] <malcom2073> hah
[20:52:08] <neverbuya_subaru> you'll get numbers and they might not be even 500% of the actual answer
[20:52:30] <neverbuya_subaru> could you show me the problem?
[20:52:32] <malcom2073> I've simplified this pretty far, intentionally
[20:52:41] <neverbuya_subaru> i want to see how its supported
[20:52:44] <malcom2073> Sure.
[20:52:58] <malcom2073> It's running again, I'll pastebin some pics once it finishes
[20:53:00] <malcom2073> or imgur
[20:53:10] <neverbuya_subaru> you gotta check for convergence
[20:53:17] <neverbuya_subaru> use the h-refincement in solidworks
[20:53:19] <neverbuya_subaru> if youre using solidworks
[20:53:27] <neverbuya_subaru> refinement
[20:54:09] <malcom2073> It's not using any adaptive, let me rerun it with that set
[20:54:36] <neverbuya_subaru> are you using solidworks?
[20:54:38] <malcom2073> yes
[20:54:47] <neverbuya_subaru> http://www.hawkridgesys.com/blog/wp-content/uploads/2012/05/trackers.png
[20:54:51] <neverbuya_subaru> itll look like that
[20:54:56] <neverbuya_subaru> if you dont see it plateau like that
[20:54:58] <neverbuya_subaru> the results can be out agaiun
[20:55:10] <neverbuya_subaru> its such a pain in the ass sometimes
[20:55:48] <malcom2073> hmm, mesh adaptation failed heh.
[20:55:57] <neverbuya_subaru> thats another pain in the ass!!
[20:56:05] <neverbuya_subaru> post a ss!
[20:56:07] <malcom2073> do I need to recreate the mesh after setting it to use h-refinement?
[20:56:33] <neverbuya_subaru> not usually
[20:56:43] <neverbuya_subaru> itll remesh automatically
[20:56:49] <neverbuya_subaru> in areas where there is convergence issues
[20:56:53] <neverbuya_subaru> at each iteration
[20:57:23] <malcom2073> I had to use a curvature based mesh fwiw
[20:57:30] <neverbuya_subaru> thats okay
[20:57:31] <malcom2073> http://i.imgur.com/PjfNh3J.png
[20:57:34] <neverbuya_subaru> i think both soolidworks and inventor
[20:57:36] <neverbuya_subaru> use triangular
[20:57:37] <neverbuya_subaru> which is ok
[20:57:51] <neverbuya_subaru> are you applying the 50lb
[20:57:56] <neverbuya_subaru> at the rectnagle frame thingy
[20:58:00] <malcom2073> Yes
[20:58:00] <neverbuya_subaru> where your tourch/router would go
[20:58:05] <malcom2073> Yes
[20:58:06] <neverbuya_subaru> on all 4 faces?
[20:58:12] <malcom2073> No, just two
[20:58:19] <malcom2073> Intentionally
[20:58:43] <neverbuya_subaru> lets go throug hthis step by step so i dont miss anything
[20:58:47] <malcom2073> k
[20:58:51] <neverbuya_subaru> when you apply 50lb to those faces
[20:58:53] <malcom2073> skype/google hangout be easier?
[20:59:04] <neverbuya_subaru> itll divide the force over that area
[20:59:13] <neverbuya_subaru> so its not really simulating a tool
[20:59:23] <malcom2073> Right, a tool would be levered off that
[20:59:29] <neverbuya_subaru> yes
[20:59:31] <malcom2073> possibly even pulling on the top one, and pushing on the bottom
[20:59:39] <neverbuya_subaru> its best to use remote force
[20:59:47] <neverbuya_subaru> so its a "point" force
[20:59:53] <neverbuya_subaru> cause itll be the worse case scenario
[20:59:56] <neverbuya_subaru> anyway thats not your q
[20:59:59] <malcom2073> I couldn't get my spindle model to mesh, I need to make a simpler one heh
[21:00:07] <neverbuya_subaru> i dont have skype or hangouts :{
[21:00:10] <malcom2073> k
[21:00:51] <neverbuya_subaru> your statement is right
[21:01:03] <malcom2073> My concern: Can I reduce the size of the tube, and if so, what reinforcement do I need to make to ensure deflection is within limits? Thus the question: what is my limit?
[21:01:54] <malcom2073> fwiw, my dad is a retired mechie, who used to do FEA's in his sleep... by hand, so I've been getting tidbits from him on how to figure these, and lots of "be careful with your results, they are not what you think they are" heh
[21:01:56] <neverbuya_subaru> start with your frame
[21:02:01] <neverbuya_subaru> that holds the Z axis and Y axis
[21:02:04] <neverbuya_subaru> completely isolate it
[21:02:13] <neverbuya_subaru> supress the base frame
[21:02:32] <neverbuya_subaru> assume the attachment points of your Y gantry thing is fixed
[21:02:34] <malcom2073> If I do that, what do I consider fixed, the upright legs since the base frame is attached to them?
[21:02:38] <malcom2073> Ah
[21:02:39] <malcom2073> ok
[21:02:43] <malcom2073> One piece at a time
[21:02:46] <neverbuya_subaru> that will simulate worse case scenario
[21:02:52] <neverbuya_subaru> for the gantry
[21:02:56] <neverbuya_subaru> but use remote force
[21:03:24] <neverbuya_subaru> then once your get a good solid result
[21:03:28] <neverbuya_subaru> (convergence etc)
[21:03:30] <neverbuya_subaru> then youre ready to do that
[21:03:44] <malcom2073> ok lemme set that up
[21:03:48] <neverbuya_subaru> in solidworks you can make the tube thickness a parameter
[21:03:53] <neverbuya_subaru> and make the simulation completely automatic
[21:04:04] <neverbuya_subaru> you could specify a desired deflection
[21:04:12] <neverbuya_subaru> and itll keep iterating till it meets it
[21:04:20] <neverbuya_subaru> or you can do it manually
[21:04:55] <neverbuya_subaru> solidworks also sets any places those 2 components meet
[21:05:00] <neverbuya_subaru> as a bonded contact
[21:05:10] <neverbuya_subaru> i think in your case that is fine
[21:08:32] <malcom2073> remeshing the smaller model
[21:08:47] <malcom2073> And solving now
[21:08:57] <neverbuya_subaru> how many steps did you chose for hrefinrcement
[21:10:12] <malcom2073> 3 loops
[21:10:41] <malcom2073> Indeed remote force does make a difference
[21:12:16] <neverbuya_subaru> i love that option
[21:12:28] <neverbuya_subaru> cause it calculates all the force-moment equilibrium for you
[21:13:48] <malcom2073> http://i.imgur.com/SkBX659.png
[21:13:56] <neverbuya_subaru> much better!
[21:14:08] <malcom2073> Def need an angle bracket at the top there
[21:14:20] <neverbuya_subaru> 0.015 mm
[21:14:25] <malcom2073> Granted, that's only 0.009mm heh
[21:14:28] <malcom2073> at the top
[21:14:33] <neverbuya_subaru> did you check your convergence plot
[21:14:38] <neverbuya_subaru> to see if it plateaued
[21:14:38] <malcom2073> No, looking for that now
[21:17:43] <malcom2073> huh, it only did one loop
[21:18:59] <neverbuya_subaru> if youre only analyzing displacement
[21:19:08] <neverbuya_subaru> itll converge
[21:19:09] <malcom2073> I'm looking at stress for that
[21:19:12] <neverbuya_subaru> stress on the otherhand wont
[21:21:58] <neverbuya_subaru> http://i.imgur.com/UUwZuG2.png
[21:22:07] <neverbuya_subaru> malcom2073: it should looke like this
[21:22:18] <neverbuya_subaru> notice how significantly the values change!
[21:22:32] <neverbuya_subaru> i dont really see a lot of crazy singularities in your model
[21:22:34] <neverbuya_subaru> except the sharp corners
[21:22:42] <neverbuya_subaru> but they're not that big of a deal cause solidworks will handle them fine
[21:22:54] <neverbuya_subaru> i dont think you need to worry about h-refinement right now
[21:23:01] <neverbuya_subaru> if you had holes and other stress concentrations
[21:23:02] <neverbuya_subaru> yes
[21:23:06] <neverbuya_subaru> actually itake that back
[21:23:08] <malcom2073> I *will* have holes
[21:23:09] <neverbuya_subaru> you have radiues
[21:23:12] <neverbuya_subaru> radiuses
[21:23:15] <malcom2073> I removed them for simplicities sake
[21:23:33] <malcom2073> They were predominantly on the ends, for bolting them together
[21:23:49] <neverbuya_subaru> i doubt they will be your failure poijnt
[21:23:54] <neverbuya_subaru> unless youre planning to use m3 screws :)
[21:23:57] <malcom2073> Hehe
[21:23:58] <malcom2073> No
[21:24:16] <neverbuya_subaru> in my experience, for what youre doing
[21:24:27] <neverbuya_subaru> youre not limited by the material failing
[21:24:36] <neverbuya_subaru> youll be limited by the deflection
[21:24:38] <malcom2073> No, I'm not concerned about failure as much as flex
[21:24:39] <malcom2073> yeah
[21:25:19] <neverbuya_subaru> is this a router?
[21:25:22] <malcom2073> Yeah
[21:25:25] <neverbuya_subaru> cutting aluminum?
[21:25:28] <malcom2073> I'd like it to
[21:25:42] <malcom2073> My rails are more than capable, so the frame might as well be
[21:25:59] <neverbuya_subaru> if you design for 400lb
[21:26:04] <neverbuya_subaru> you should have a stout machine
[21:26:09] <malcom2073> Yowch
[21:26:13] <neverbuya_subaru> in reality i think 200lb should be ok
[21:26:13] <malcom2073> that's a lot though
[21:26:17] <malcom2073> For aluminum?
[21:26:19] <neverbuya_subaru> yea
[21:26:26] <neverbuya_subaru> see my number is out of my ass
[21:26:31] <neverbuya_subaru> cause i dont know what size cutter your using
[21:26:35] <malcom2073> Neither do I!
[21:26:36] <neverbuya_subaru> im assuming maximum 1" cutter
[21:26:38] <neverbuya_subaru> lol
[21:27:21] <malcom2073> Probably 1/2 or 3/4" cutter at most for the aluminum, depending on how fast I want to go
[21:27:35] <malcom2073> And how much force I want to design for
[21:27:39] <neverbuya_subaru> how much depth of cut
[21:27:50] <malcom2073> Unsure, what would 50lbs buy me? :P
[21:27:54] <neverbuya_subaru> haha
[21:28:11] <malcom2073> Lots of variables I can shuffle around to get something that works
[21:29:37] <malcom2073> So 0.025mm is probably a good flex target at the tool for whatever max load I want to push on it yeah? The question is now, what load
[21:29:55] <malcom2073> Right now, the machine is going to weigh 2500lbs, and cost me about $1500 in steel
[21:30:12] <neverbuya_subaru> okay assuming 3/4" cutter
[21:30:26] <malcom2073> I'd like to get that lighter, just because it'd be cheaper (and easier to haul the parts around)
[21:30:32] <neverbuya_subaru> 3 flute cutter
[21:30:43] <neverbuya_subaru> at a decent feed (0.005"/tooth)
[21:30:55] <malcom2073> hmm, 1500lbs maybe, I forget
[21:31:04] <neverbuya_subaru> im getting .125" doc
[21:31:08] <neverbuya_subaru> if youre doing slotting
[21:31:11] <neverbuya_subaru> you should be around 50lb
[21:31:17] <malcom2073> slotting is worst case probably
[21:31:41] <neverbuya_subaru> see since youre using fea
[21:31:46] <neverbuya_subaru> you could really optimize it well.
[21:32:04] <neverbuya_subaru> i think you should be easily able to handle 500lb cutting force
[21:32:10] <neverbuya_subaru> with a 2500lb machine!
[21:32:13] <malcom2073> lets see, calculator says at 18krpm, that's 270IPM
[21:32:14] <malcom2073> heh
[21:32:17] <neverbuya_subaru> think about it
[21:32:20] <neverbuya_subaru> its like a milling machine
[21:32:21] <malcom2073> I think it's a 1500lb machine
[21:32:23] <neverbuya_subaru> but bigger
[21:33:11] <malcom2073> yes, much bigger, much sparser in terms of metal
[21:33:21] <neverbuya_subaru> maybe you can fill the tubes with concrete
[21:33:23] <neverbuya_subaru> or something like that?
[21:33:24] <malcom2073> Yeah 1500lbs
[21:33:33] <malcom2073> I thought about epoxy granite
[21:33:41] <malcom2073> At least in the base frame for vibration dampening
[21:34:41] <malcom2073> 0.125" doc is 50lbs, would double that be double the force?
[21:35:28] <malcom2073> Actually, 0.125 is probably ok, the thing will be able to move fast enough at that depth that it wouldn't take terribly long to cut through stuff
[21:35:54] <neverbuya_subaru> yes approx double
[21:36:51] <neverbuya_subaru> design the machine tomo :p
[21:36:54] <neverbuya_subaru> its new years
[21:36:57] <neverbuya_subaru> fire works time!!!!!!
[21:36:57] <neverbuya_subaru> :D
[21:37:28] <malcom2073> Happy new years!
[21:37:40] <neverbuya_subaru> happy new year!
[21:37:42] <malcom2073> Thanks for the help and advice, I'm gonna do some fiddling with this design see what I can do
[21:37:47] <neverbuya_subaru> np
[21:37:51] <neverbuya_subaru> glad to see someone designing
[21:37:56] <neverbuya_subaru> not just putting it together :)
[21:38:05] <malcom2073> I have zero business actually designing fwiw, but damn it it's gonna be fun to build regardless :-D
[21:46:40] <jesseg> So what's the name of that little plate that goes up under the way on a wood lathe that acts like a large washer for the bolt that clamps the tailstock or toolrest?
[22:54:54] <Contract_Pilot> Thinking on this G0704 do it in servos 80SY-M04025 should be large enough for all azis
[23:19:40] <Contract_Pilot> Odd Drive Wireing to a Mesa 7I76 http://www.microkinetics.com/images/dm8010ad.jpg
[23:20:01] <Contract_Pilot> Only use Step Dir on PMDX
[23:25:31] <Contract_Pilot> +5v also
[23:43:19] <Contract_Pilot> I am Assuming i will use DIR+ STEP+ +5VP and GRND on the mesa