#linuxcnc Logs

Feb 16 2020

#linuxcnc Calendar

12:15 AM veegee: I don't have a surface grinder, but I need to flatten my oilstones. Thoughts on this diamond lapping plate? https://www.amazon.ca/DMT-Diamond-Machining-Technology-DIAFLAT/dp/B005FUHTDG
12:20 AM veegee: They claim flatness to < 12┬Ám
12:20 AM XXCoder: you could do 3 stome method
12:20 AM veegee: Never heard of it
12:20 AM roycroft: i think i told you a week or so ago that i have that lapping plate, veegee
12:20 AM roycroft: and i also told you to use the three stone method if you want to save money
12:20 AM veegee: Hmm, must have missed those messages, sorry : (
12:20 AM veegee: I'll check my logs
12:20 AM roycroft: it's a great lapping plate
12:20 AM veegee: I don't mind spending the money on a quality tool
12:20 AM roycroft: but you said you were getting a norton oilstone
12:20 AM roycroft: and those are about $30
12:20 AM veegee: Yeah I ordered the norton oilstone and those aren't flat
12:20 AM roycroft: so buy three of them
12:20 AM roycroft: label them a, b, and c
12:20 AM roycroft: lap a against b
12:20 AM roycroft: lap b against c
12:20 AM roycroft: then lap c against a
12:20 AM roycroft: repeat the cycle
12:20 AM roycroft: and all three will be perfectly flat
12:20 AM veegee: I could also just lap one against this diamond plate right?
12:20 AM roycroft: yes
12:20 AM veegee: Yeah I don't mind getting the diamond plate
12:20 AM roycroft: it will last for a very long time
12:20 AM roycroft: i don't use my water stones any more - they work great but they are way too messy
12:20 AM roycroft: i used that lapping plate to flatten the water stones
12:22 AM roycroft: for my water stones i just used plain water for lapping (i have very soft water - if yours is hard use bottled distilled water)
12:22 AM veegee: I have a distiller
12:22 AM roycroft: for oil stones, simple green is great for lapping
12:24 AM XXCoder: that guy have amazing 3 stone video
12:24 AM XXCoder: lemme see if can find...
12:25 AM XXCoder: hmm https://www.youtube.com/watch?v=vN8zMz8nYmM not the video i was thinking about but...
12:25 AM veegee: Will check it out, thanks
12:25 AM roycroft: you can use it to flatten surface plates
12:25 AM roycroft: it will get them flat and it will buff out your arms
12:26 AM XXCoder: veegee: essentally if you do 2 stones, both will go to curved average
12:26 AM XXCoder: third stone kills those
12:26 AM XXCoder: end result you have 3 very flat stones
12:27 AM veegee: I'll try that on my cheap waterstones to practice
12:27 AM roycroft: the three stone method requires no practice
12:27 AM roycroft: a monkey can do it
12:35 AM veegee: In other news, Vactra #2 is crap
12:35 AM XXCoder: whats i
12:36 AM veegee: I bought PC Waylube 68 as well as Accuflo TK 68
12:37 AM veegee: The Accuflo TK 68 has insane tackiness, exactly what I wanted. The PC Waylube 68 has a bit more tackiness than the Vactra #2. But both have much better stick slip properties
12:43 AM XXCoder: cool you know more about lubes than I do :D
12:44 AM veegee: It's more the irritation that everyone recommends Vactra #2 for some reason. Apparently the formula is very different from what it was decades ago
12:45 AM XXCoder: theres like 5 gallon one and onbe gallon
12:45 AM XXCoder: one gallon would last me long time
12:46 AM veegee: Apparently Vacuoline 1409 is what Vactra #2 used to be, but I don't want to waste money on Mobil anymore
12:46 AM XXCoder: found it
12:46 AM XXCoder: https://www.youtube.com/watch?v=DVLXsq7pi9Y
12:46 AM veegee: I bought 20L of the Accuflo TK 68 and PC Waylube 68. I oil my machine quite a bit
12:46 AM XXCoder: behold the precision god
12:46 AM XXCoder: fine hes not literally god, but he IS precision guy. i guess he gets paid $100 a hour easily
12:46 AM veegee: Oil is cheap. Replacement parts are expensive
12:47 AM veegee: Nice, I'll check it out
12:47 AM XXCoder: many videos. careful on addiction
12:47 AM XXCoder: contact me before building temple to him
12:53 AM veegee: Is there a way to check for surface flatness without a reference straight edge?
12:53 AM veegee: Some kind of optical mechanism perhaps? Something to do with wave interference patterns?
12:54 AM XXCoder: yeah he has video on that
12:54 AM veegee: perfect
12:54 AM XXCoder: in the very video I linked to, he talks about it a bit
12:55 AM XXCoder: but he does get mnore in-depth in other video
01:00 AM XXCoder: 12:30 he uses new stone and boom mirror finish is gone
01:00 AM XXCoder: thats why he talks about how to prep new stones. though he uses expensive equipment so you would need 3 stone method to do same but "free"
01:02 AM XXCoder: vee do watch entire video you will learn a *lot* about using stones
01:08 AM XXCoder: 19:50 something he stones end of caliper. extreme skill because easy to screw that up lol
01:16 AM XXCoder: veegee: watching? at 26:28 something he shows brand new stones thats curved heh
01:17 AM XXCoder: though he uses a grinder which most people dont have
01:22 AM XXCoder: 34:00 hinge check. forgot about that
01:24 AM XXCoder: veegee: another GREAT stoning video https://www.youtube.com/watch?v=rHmsQEAx16o
01:25 AM XXCoder: 3 stones, he makes lapping stones
01:31 AM XXCoder: https://youtu.be/-w4R2eAHHiI?t=605 he starts to talk about and doing 3 stone method here.
02:18 AM XXCoder: hey
02:19 AM Deejay: moin
02:41 AM veegee: XXCoder thanks a lot, I'm adding all of these to my machining playlist. Will definitely watch this weekend. Let me know if you can find a good old muslim stoning video
02:41 AM veegee: The traditional ways never go out of style
02:41 AM XXCoder: part 3 (not linked) is very good also
02:41 AM XXCoder: he also uses light thingy there also lol
02:45 AM XXCoder: veegee: hope you enjoy those!
02:46 AM veegee: The muslim joke went over your head didn't it haha
02:46 AM XXCoder: i guessed it might be religion thing
02:46 AM XXCoder: so i just 9gnored it heh
02:48 AM veegee: "stoning" to them means killing someone by immobilizing them and throwing stones at their head, usually for some ridiculous reason in the name of allah
02:48 AM XXCoder: dont forget that christian people did it also
02:49 AM veegee: ah yes, equally disgusting religion
02:49 AM XXCoder: worst sect is gospel of posperity
03:01 AM selroc: hi guys
03:03 AM XXCoder: hey
03:04 AM selroc: sunny day
03:06 AM selroc: the log is not working: connection timed out
03:07 AM selroc: probably this firewall does not allow ports other than 80
05:18 AM jthornton: morning
05:18 AM XXCoder: hey jt
07:16 AM fogl81: hello
07:17 AM fogl81: is there a way to transfer an array of data from one hal module to the other?
07:22 AM fogl81: my idea now is to use additional faster thread period, which would transfer data on single input
07:23 AM fogl81: is there a better way to achieve that
07:25 AM jthornton: what are you trying to accomplish?
07:48 AM R2E4: JT, you around?
08:03 AM JT-Shop: yea, just getting some fires going
08:16 AM JT-Shop: wow one tiny ember left in the coals... got that puppy back to blazing
08:27 AM _unreal_: morning
08:28 AM Elmo40: moo
08:28 AM Elmo40: _unreal_, you get that machine rolling yet?
08:28 AM _unreal_: Y moves
08:28 AM Elmo40: nice
08:29 AM Elmo40: did you get a smaller belt? or added a tensioner?
08:29 AM _unreal_: no logic yet. but I can put power to it
08:29 AM _unreal_: smaller
08:29 AM _unreal_: I need a larger but I just relocated two idlers to give the tiny bit of slack I needed
08:29 AM Elmo40: are they 10mm wide?
08:29 AM _unreal_: yes
08:30 AM Elmo40: cool
08:30 AM Elmo40: should last a long time
08:30 AM Elmo40: so. one motor for Y?
08:30 AM _unreal_: the only thing stopping me from setting up the motor controllers is having no fucking way to program the damn DSPICS
08:30 AM Elmo40: and belted on the one end?
08:31 AM _unreal_: I have 10 different programers and nothing works.
08:31 AM Elmo40: https://www.microchip.com/design-centers/motor-control-and-drive/control-products/dspic-dsc-pic24
08:31 AM Elmo40: this thing?
08:31 AM _unreal_: dspic30f4012
08:32 AM _unreal_: my dspic is a clone come to find out
08:33 AM _unreal_: microchip has dumped support for the pickit3, pickit4s are not available
08:33 AM _unreal_: sold everywhere ON BACKORDER
08:33 AM _unreal_: its mind numbing my minipro does not support dspic programming
08:34 AM Elmo40: so... get a supported chip?
08:35 AM _unreal_: ? I dont know what you mean?
08:35 AM _unreal_: I'm working on building this I just ordered the parts http://usbpicprog.org/
08:35 AM _unreal_: suposidly http://enomem12.blogspot.com/2016/06/arduino-dspic30f-programmer.html this will work but I cant get the software to compile its too old
08:36 AM _unreal_: I'm not spending all day to setup a computer with old software just to do one thing
08:36 AM Elmo40: you said microchip dumped support
08:36 AM Elmo40: so, buy a chip that is supported
08:36 AM _unreal_: they dumped support fro the programmer
08:37 AM _unreal_: and I got spoofed on a clone pickit
08:37 AM Elmo40: 16-bit chip?
08:38 AM _unreal_: dspic30f4012
08:38 AM _unreal_: no idea
08:38 AM _unreal_: http://ve7it.cowlug.org/dspic-servo.html
08:38 AM Elmo40: it is 16-bit
08:40 AM * jthornton thinks Bob left the building
08:40 AM Elmo40: _unreal_, did you look at this?
08:40 AM Elmo40: https://www.microchip.com/DevelopmentTools/ProductDetails/PartNO/PG164140
08:42 AM Elmo40: and the programmer for it
08:42 AM Elmo40: https://www.microchipdirect.com/product/PG164140
08:42 AM Elmo40: $50
08:42 AM Elmo40: but... arrives in MAY?!?!
08:42 AM Elmo40: must be a LONG boat ride...
08:49 AM _unreal_: Elmo40, I just SAID pickit4s are not avaialbe
08:50 AM _unreal_: no microchip dumped support for the pickit3 produced a new programmer and didnt produce enough stock for the big swap over as everyone rushes to update
08:51 AM _unreal_: I dont want to wait 2 months JUST to get a programmer when all I need is the damn code put on the chips now and I'm up and running
08:51 AM _unreal_: Then again I have not gotten anywhere with the PSU because I'm still waiting on my jumbo caps to arrive
08:55 AM Elmo40: https://pic-microcontroller.com/
08:55 AM Elmo40: been here?
08:58 AM Elmo40: well... ebay to the rescue
08:58 AM Elmo40: https://www.ebay.com/itm/MPLAB-PICkit4-In-Circuit-Debugger-Programmer-for-PIC-dsPIC-MCUs-Fast-Programming-/192515242852
08:59 AM Elmo40: and they have 10 available
08:59 AM Elmo40: estimated ETA, March.
08:59 AM Elmo40: ;-)
08:59 AM Elmo40: faster than May!
09:00 AM Elmo40: hey, if you can find the full article...
09:00 AM Elmo40: http://archive.siliconchip.com.au/cms/A_110501/article.html
09:00 AM Elmo40: you can make your own!
09:05 AM t4nk_freenode: he could be done in 2 minutes if he downloaded the source of wxwidgets, adapted the abi version and installed that. Use it with the older compiled version of the software
09:05 AM t4nk_freenode: but oh well
09:17 AM _unreal_: as I said I dont know how to do that stuff I'm not much of a software engineer
09:17 AM t4nk_freenode: then hire an expert and be done? or read up and learn how to on your own
09:18 AM t4nk_freenode: or buy a commercial servo I'd say
09:19 AM t4nk_freenode: I'm gonna brave the weather and get to the hardware store myself
09:20 AM t4nk_freenode: treat me to a sack of concrete too :)
09:42 AM jymmmm: good morning folks
09:44 AM Javabean: good?? there is something good for your morning?
09:47 AM jymmmm: Yep, coffee =)
09:55 AM Javabean: meh i suppose it depends on how you view things... personally i drink coffee to keep sleep away
10:02 AM jymmmm: whatever works for you =)
10:12 AM * _unreal_ takes a deep ass hall off his coffee
10:13 AM _unreal_: french pressed :)
10:14 AM jymmmm: lol
10:16 AM fogl81: @jthornton: i would like to send generate an ethernet udp data frame from two hal components. I was thinking to have one udp transmitter hal component and two components each with their own part of data in the frame.
10:29 AM R2E4: sorry JT, missed you. Did you see my order go through? I didnt receive an email
10:29 AM R2E4: jthornton:
10:34 AM jthornton: R2E4, check your spam folder
10:34 AM jthornton: fogl81, sounds complicated
10:37 AM R2E4: yeah, its not there
10:37 AM fogl81: @jthornton: You mean complicated to achive this, or a complicated design?
10:37 AM jthornton: yes
10:40 AM jymmmm: Can HAL even access the UDP layer?
10:41 AM jymmmm: fogl81: Wy are you wanting to playing with the UDP layer?
10:43 AM jthornton: hmm R2E4 did you get the reply to your email asking about it?
10:43 AM t4nk_freenode: p0g0__, nooooo it aint Mozes! it's mEEE!!! *pant* there was a hole in the bag of concrete and I was too lazy to get another from the back of the store... boy is this stuff mean and dusty ;)
10:44 AM jthornton: r2 i see two different email addresses you used
10:45 AM jthornton: R2E4,
10:45 AM fogl81: @jyimm: What do you mean by udp layer? I yould like to set the udp data part of the frame (not header etc).
10:46 AM jthornton: R2E4, sent you an email...
10:47 AM R2E4: jthornton: lol, yeah sorry....
10:47 AM jthornton: no problem
10:47 AM jthornton: I must have a half a dozen email addresses\
10:51 AM R2E4: jthornton: I missed a 7i77. Can I order a 7i77 and you shiop it with this last order?
10:51 AM jthornton: that order shipped out Saturday
10:52 AM jthornton: it's already at the distribution center
10:53 AM R2E4: ok thats ok
10:53 AM R2E4: thanks
10:54 AM jthornton: I'm faster than a speeding bullet, able to trip over the smallest things I'm Super Shipper
10:54 AM R2E4: yeah well I am super order. Fast enough to miss at least one item on every order.
10:54 AM jthornton: lol
11:01 AM _unreal_: jthornton, I'm looking at the 7i92
11:01 AM jthornton: I have some 7i92H's in stock
11:01 AM _unreal_: $?
11:02 AM jthornton: https://mesaus.com/product/7i92h-2/
11:03 AM _unreal_: jthornton, My main thing is Ineed quadrature drive
11:04 AM jthornton: quadrature stepper drive?
11:04 AM _unreal_: http://ve7it.cowlug.org/dspic-servo.html
11:04 AM _unreal_: is input for motion is quadrature
11:04 AM _unreal_: not step/dir
11:06 AM _unreal_: I plan to TAP the "encoder" quadrature send that to the 7i92 as feedback and the output step/dir has to be in quadrature format
11:06 AM jthornton: yea that's above my pay grade
11:06 AM _unreal_: sounds like someone needs a promotion
11:06 AM _unreal_: lol
11:09 AM jthornton: I know the stepgen can drive 2, 3, 4, and 5 phase stepper drivers so I ASSUME you can do that with a Mesa card
11:10 AM jthornton: http://linuxcnc.org/docs/2.7/html/hal/rtcomps.html#_stepgen
11:10 AM jthornton: http://linuxcnc.org/docs/2.7/html/man/man9/hostmot2.9.html#stepgen
11:11 AM jthornton: yep it has a quadrature mode step type 2
11:13 AM _unreal_: heh ya you can get higher freq out of a par port using that drive method
11:14 AM jthornton: if you say so...
11:15 AM _unreal_: the difference is that step/dir one pin has to do all the pulsing, in quadrature, its giving the same signal as a servo encoder. so 10 11 01 00,
11:16 AM * jthornton will be back after the commercial break or nap which ever comes first
11:16 AM * _unreal_ hates commercials
01:01 PM gregcnc: anyone have experience with free machining steels? I scrounged a shaft from a printer and have made a few parts from it. It cuts like brass. any ideas?
01:09 PM Tom_L: shouldn't grab like brass though
01:11 PM unterhaus_: is there an issue with it?
01:11 PM gregcnc: i want to find a suitable alloy
01:11 PM gregcnc: no idea what it is
01:12 PM unterhaus_: wikipedia says there are three types
01:12 PM gregcnc: yeah I can read wiki
01:12 PM unterhaus_: are you just going to bolt it to something?
01:13 PM gregcnc: ?
01:13 PM gregcnc: I'm turning parts in a lathe
01:14 PM gregcnc: small parts and want short chipping and good surface finish, rather not use 12L14
01:14 PM Tom_L: 12L14
01:14 PM Tom_L: 1018
01:15 PM Tom_L: i grab whatever's on the pile that will suit
01:16 PM gregcnc: and drill 0.5mm holes in it?
01:16 PM gregcnc: for the length of a bar without problems?
01:17 PM Tom_L: how long is the bar?
01:17 PM gregcnc: i mean parts totallingthe length of thebar not a 0.5mm hle 12 feet deep
01:18 PM unterhaus_: .5mm hole is above my pay grade
01:18 PM Tom_L: doesn't 12L18 have more lead in it?
01:18 PM Tom_L: that's probably a good thing for that small a drill
01:18 PM gregcnc: no lead
01:19 PM unterhaus_: none of the free machining steels look like something you would want to make a cooking implement with
01:20 PM gregcnc: well I do my reasearch
01:20 PM gregcnc: I will
01:21 PM Tom_L: is this something you'll have to buy a bar for or are you just asking about the printer rod?
01:24 PM gregcnc: i want to source material
01:25 PM unterhaus_: not considering stainless?
01:26 PM gregcnc: I would, if it machines well, which is short chipping?
01:34 PM _unreal_: t4nk_freenode, so I'm still trying to figure out how to get the thing compiled but I seem to be missing a "hexfile.o"
01:35 PM _unreal_: t4nk_freenode, compiling from source http://enomem12.blogspot.com/2016/06/arduino-dspic30f-programmer.html
01:35 PM unterhaus_: 303 is supposed to be, but I'm hardly an expert
01:36 PM unterhaus_: I scrounged a piece of stainless that was probably 303, big pain to work with on the lathe because all the chips went down my shirt
01:37 PM unterhaus_: I have a piece of acrylic sitting there for that reason, but nothing to mount iton
01:37 PM Tom_L: stainless work hardens pretty easy
01:37 PM _unreal_: unterhaus_, wtf are you complaining about. could have been worse and down the pants
01:41 PM unterhaus_: I think stainless fits with my brute-force machining style
01:41 PM unterhaus_: although I burned some drill bits recently trying to make a stainless shaft coupler
01:41 PM unterhaus_: I'm definitely on the wrong side of the learning curve
01:57 PM _unreal_: stainless is SLOW and wants cooling
01:57 PM _unreal_: I work in the marine industry
01:58 PM _unreal_: are you running on lathe? or milling?
02:40 PM _unreal_: I am so glad I just did that, ok so I just swapped the servo motors I have on the Y. the other motor that I had not tested is WAY more powerful/fast per volt
02:41 PM _unreal_: so Y axis is now no longer going to be a SLUG
02:41 PM _unreal_: which means I'm likely going to drop the pully size a bit for the X axis
02:42 PM _unreal_: using the other motor. sure I'll loose a little torque/resolution but at least it wont be a SLUG, then again Y axis is twin lead screws
02:42 PM _unreal_: so wholes live?
02:43 PM _unreal_: who is
02:43 PM _unreal_: ahh ya bunch O dead beats
02:44 PM gregcnc: ay?
02:44 PM gregcnc: didn't you do the math while choosing components for the machine?
02:44 PM _unreal_: both motors have the same " specs "
02:45 PM _unreal_: but they are slightly differnt models
02:45 PM _unreal_: both rated at 240z/in and 24v
02:45 PM _unreal_: 24 oz/in
02:45 PM gregcnc: spec sheets?
02:46 PM _unreal_: I wish
02:46 PM _unreal_: they are far to old
02:46 PM _unreal_: going off the specs on the motor its self
02:46 PM gregcnc: that's a crapshoot for a real design
02:47 PM unterhaus_: it's possible that the one motor got demagnitized
02:48 PM gregcnc: that wouldn't help
02:48 PM unterhaus_: I got a motor for almost nothing once, it had a mechanism to lock the rotor
02:48 PM _unreal_: Hitachi 37807 24VDC 1.5 Amp 33W Permanent Magnet Motor, 1150 RPM
02:48 PM _unreal_: unterhaus_, not likely
02:49 PM unterhaus_: only so much you can do to make one motor weaker than the other
02:49 PM _unreal_: unterhaus_, different model/year built
02:49 PM _unreal_: the chances that the magnet is messed up are slight
02:49 PM _unreal_: and the more powerful motor is from the 80's
02:50 PM _unreal_: the less powerful one is from the 90's MFD
02:50 PM _unreal_: both have the same specs but the bodies are different slightly
02:51 PM _unreal_: the both came from dot matrix printers
02:51 PM gregcnc: without spec sheet it's tough to say what's going on
02:51 PM _unreal_: so the chances that one got messed up is slight
02:51 PM _unreal_: no water damage ether
02:54 PM unterhaus_: damage seems unlikely in a printer
02:55 PM gloops: 240oz chinese steppers arent so expensive for a pair
02:56 PM _unreal_: I'm going dc motors
02:57 PM gloops: https://www.ebay.co.uk/itm/1PC-Nema23-stepper-motor-270oz-in-4-2A-8mm-shaft-diameter-Jade-carving-machine/163961491614?
02:57 PM _unreal_: with out encoders steppers are not good in a high rpm setup
02:57 PM _unreal_: and my setup requires high RPM
02:58 PM gloops: are these drive motors..or for the cutting spindle?
02:58 PM _unreal_: drive motors
02:58 PM _unreal_: 2k RPM gets me 50/ipm
02:58 PM gregcnc: if steppers aren't working at speed, they are too small
02:58 PM gloops: how fast you thinking of going?
02:58 PM _unreal_: its geared down
02:59 PM _unreal_: ! one sec I'll post a new photo
02:59 PM gloops: lol, well we knew this would be an unconventional design
02:59 PM _unreal_: I HAD to gear it down to use one motor to drive twin lead screws
03:00 PM _unreal_: https://drive.google.com/open?id=1kViyHDq6daYxik7cf587PP_aZ50MCRVm
03:01 PM _unreal_: starting to setup X lead screw https://drive.google.com/open?id=1kE3GIjlR14hFWEo2wDmuucLOS3Y_125T
03:02 PM _unreal_: so quiet
03:02 PM gloops: 1 x240oz motor is going to run that gantry?
03:02 PM _unreal_: I dont have a 240oz motor
03:02 PM _unreal_: where are you getting 240
03:02 PM gregcnc: the typo earlier
03:03 PM gregcnc: was any math done at all to size this motor?
03:03 PM * _unreal_ rolls eye's I fixed it with in seconds
03:03 PM _unreal_: yes
03:03 PM gregcnc: how did you arrive at 24oz-in?
03:03 PM _unreal_: its written on the @$#$%@#$ motor
03:03 PM _unreal_: god does no one pay attention
03:04 PM gregcnc: )(#%*&^()*#%&^ nobody comprehends. how did you decide 24oz would be enough for this axis?
03:04 PM selroc: hi guys
03:05 PM _unreal_: 24 oz/in const. and can go be driven mlti times OVER its rated power for short times
03:05 PM gregcnc: continue
03:06 PM _unreal_: my torque at the axis is 400.. crap I got to do the numbers again 400 something oz/in
03:06 PM _unreal_: not sure where the paper I wrote everthing down on is
03:06 PM _unreal_: 10teeth on the motor pully
03:06 PM _unreal_: 48 on the lead screw
03:06 PM _unreal_: and 1/2"-13 lead screw
03:06 PM gregcnc: so where does the speed comes from?
03:07 PM _unreal_: thats based on the RPM of the motor
03:07 PM _unreal_: if the motor can spin at X speed, then doing the reduction of the pullies and the lead screw
03:07 PM gloops: all these belts and pulleys are losing power and adding backlash you know
03:07 PM gregcnc: thenk you i understand gears, but if you trade speed for torque there is no speed
03:07 PM _unreal_: backlash LOL
03:07 PM _unreal_: there is no backlash
03:07 PM gregcnc: yes there is
03:08 PM _unreal_: there is only one pully
03:08 PM _unreal_: pulley
03:08 PM gregcnc: let's agree that it's trivial in this case
03:08 PM _unreal_: there is no slack in the pulley
03:08 PM gregcnc: let's agree that it's trivial in this case
03:09 PM _unreal_: gloops, if you had said pulleys idlers I'd have agreed with you
03:09 PM gregcnc: new motor is that reliance?
03:09 PM _unreal_: brand?
03:10 PM _unreal_: they are HITACHI digital
03:10 PM gregcnc: specs of those?
03:10 PM _unreal_: the black one in the photo I dont know off hand I'd have to go look it up. but that one has a 10:1 gear reducer so thats going to go on Z direct drive
03:10 PM _unreal_: I posted them already
03:11 PM gregcnc: the 24oz? motors?
03:11 PM _unreal_: yes
03:11 PM _unreal_: they are both the "same" motor just different versions but same specs
03:11 PM _unreal_: 2.2A 24v 24 oz/in
03:11 PM gregcnc: so how much current will you drive these with
03:12 PM _unreal_: 7A max
03:12 PM gregcnc: for how long?
03:12 PM _unreal_: they draw about 1amp unloaded on the machine right now
03:13 PM _unreal_: direct DC no motor controllers yet :(
03:14 PM _unreal_: I dont have spec sheets on them. but they are the same motos as ve7it's website. http://ve7it.cowlug.org/dspic-servo.html
03:14 PM _unreal_: so I dont even have to change the resistor values
03:14 PM _unreal_: or settings
03:14 PM _unreal_: I'll only need to adjust the PID's when I get the damn pic programmed
03:14 PM gregcnc: What voltage are you driving with?
03:15 PM _unreal_: 24v but I believe the psu I'm going to use is going to output about 26.9v DC after rectification
03:16 PM _unreal_: https://www.ebay.com/itm/500VA-20V-12-5A-20V-12-5A-40V-CT-Power-Transformer-Antek-AN-5220/371662652156?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
03:16 PM _unreal_: That is my PSU
03:16 PM _unreal_: I'm still waiting on the @#$@#$ jumbo caps I ordered
03:16 PM * _unreal_ is so tired of waiting on ordered parts
03:18 PM _unreal_: though with load I'm sure the voltage will drop down to about 24vdc
03:19 PM _unreal_: sigh... need to leave in a few min to get the kid
03:19 PM _unreal_: 3 hour tour
03:20 PM _unreal_: any more questions?
03:25 PM _unreal_: later off to get the kid
04:25 PM skunkworks: https://www.youtube.com/watch?v=LKjNOVHhHio
04:26 PM Tom_L: you're just not happy unless you got a bundle of wires hangin out of that thing!
04:29 PM skunkworks: Tom_L: :)
04:29 PM skunkworks: it will be buttoned up in a year or two...
04:29 PM Tom_L: meh, any bets on that?
04:33 PM skunkworks: :)
04:33 PM skunkworks: it is mostly wired up...
04:34 PM Tom_L: maybe some day i'll find a tiny bit bigger control box and make mine look all pretty too
04:34 PM Tom_L: i'm not holding my breath though
04:39 PM Deejay: gn8
04:45 PM unterhaus_: skunkworks, what is the pi hooked to?
04:47 PM unterhaus_: I heard "lee chaing"
05:01 PM skunkworks: lee chaing?
05:02 PM skunkworks: leadshine.
05:02 PM skunkworks: mx3660
05:02 PM skunkworks: unterhaus_: ^
05:03 PM skunkworks: it is funny - one of the stepper drives in the leadshine shorted out. On that circuit board it says leashine.
05:22 PM pink_vampire: skunkworks: this is very good news!!
05:23 PM pink_vampire: skunkworks: do you know if grbl is real time?
05:29 PM skunkworks: the grbl part that runs in the arduino is pretty realtime...
05:30 PM Tom_L: it's not running multiple threads either is it?
05:32 PM skunkworks: I really don't know the implementation....
05:32 PM Tom_L: i suppose it could be but you'd have to set up some sort of time slice code
05:48 PM Jymmm: Does the default (software) estop chain come predefined with a "heartbeat" on the paraport?
05:52 PM pink_vampire: I don't know how the 3d printer hardware can run HUGE gcode files, and do it with much faster feedrate then linux cnc
05:53 PM XXCoder: its because its all g1s
05:53 PM XXCoder: 3d printers dont do g2 g3
05:53 PM pink_vampire: are you sure??
05:53 PM XXCoder: yeah
05:53 PM pink_vampire: there is no arcs?
05:53 PM XXCoder: nope
05:54 PM XXCoder: hell, most shitty firmware turn g2 g3 they get into segemented g1s
05:54 PM XXCoder: nothing is like linuxcnc and actual pro cam software
05:54 PM XXCoder: (and pro level cnc machine software)
05:55 PM pink_vampire: but the arcs on the prints looks very nice and smooth
05:55 PM XXCoder: yeah. go to reprap and say polyholes?
05:55 PM skunkworks: pink_vampire: also - very high accelleration..
05:55 PM XXCoder: you'll learn a lot about polyholes and issues
05:55 PM skunkworks: When you are only moving a small mass.
05:56 PM XXCoder: skunk yeah no sideload helps a hell of a lot.
05:56 PM XXCoder: diggy is very different than layering
05:56 PM pink_vampire: so, for laser cutter do you think grbl will be better?
05:57 PM XXCoder: if youre buying one, make sure it have pwm output! (3 pin jst port)
05:57 PM XXCoder: if it doesnt then you cant update grbl on it
05:57 PM XXCoder: because it uses 2 wire jst, and they hacked grbl to work using that
05:58 PM pink_vampire: I was thinking about something like belt drive cnc router with laser option
05:58 PM XXCoder: ehh laser and cnc router have opposite needs
05:59 PM XXCoder: laser need to be very fast, very lwo sideload
05:59 PM XXCoder: cnc router needs strength
05:59 PM XXCoder: 3d printer and laser is similiar enough you can do it there, if you design it so hotend, coldend assembly can be removed and changed to laser module
06:00 PM XXCoder: franjly i suggest seperate machines anyway
06:00 PM pink_vampire: think about something like the MPCNC but with better rails
06:11 PM XXCoder: maybe, mgn is cheap compared to before
06:11 PM XXCoder: can always buy sbrs
06:15 PM CaptHindsight: TIPS ON PRECISION SPINDLE REBUILD https://www.youtube.com/watch?v=grUdsTTRGl4
06:15 PM XXCoder: yep watched that video
06:15 PM XXCoder: hes insane
06:15 PM XXCoder: the process is insane'
06:49 PM unterhaus: I read pretty far into the mendel code and it seems like it's pretty much one big loop
06:49 PM unterhaus: amazing how well it works
06:50 PM unterhaus: I'm thinking about adapting the grbl code for a project
06:52 PM unterhaus: most of the axes will be fine with g-code
09:00 PM SpeedEvil is now known as Guest45505
10:15 PM fjungclaus1 is now known as fjungclaus
11:03 PM _unreal_: yawn
11:14 PM Elmo40: moo?
11:15 PM Javabean: meh, i guess that means there are more cows in the irc rooms i am in than cats or dogs
11:19 PM _unreal_: steer thank you
11:23 PM ve7it: _unreal_, how goes the pic wars?
11:26 PM _unreal_: dead
11:26 PM _unreal_: till I get a working programmer
11:26 PM _unreal_: I gave up on this crap http://enomem12.blogspot.com/2016/06/arduino-dspic30f-programmer.html
11:26 PM _unreal_: too old, cant get it to compile
11:29 PM _unreal_: pickit4 is out of stock and backordered world wide
11:30 PM _unreal_: I ordered parts for this http://usbpicprog.org/
11:33 PM ve7it: interesting
11:34 PM _unreal_: its mind numbing that my minipro programmer does not support dspic
11:34 PM _unreal_: I have a number of programers but nothing supports it :(
11:34 PM _unreal_: wish my FTDI could be used
11:35 PM ve7it: I ahve been trying to remember how I compiled the pic stuff. I found copies of the old mplac and c30 releases for windows, but I cannot for the life of me remember if I had a temp windows box set up or if I had stuff working under wine on linux
11:35 PM _unreal_: or usbasp
11:35 PM _unreal_: in the photo I see the TEMP WIRE is connected
11:36 PM _unreal_: http://ve7it.cowlug.org/servo001.jpg
11:39 PM ve7it: http://ve7it.cowlug.org/dspic-programmer.html I did use this for a while but the pikit2 was easier... trying to remember what I drove it with... something standalone or from inside mplab
11:39 PM unterhaus: dspic was someone else's product until pic bought them out
11:40 PM Javabean: unreal, is that project abandoned?
11:41 PM _unreal_: what project abandoned?
11:42 PM Javabean: that usbpicprog org place
11:42 PM _unreal_: dont know seems rather active to me
11:43 PM Javabean: site "news" hasn't been updated since 2014 and no one said anything on the linked forums since 2018
11:43 PM _unreal_: who knows
11:44 PM ve7it: _unreal_, are you talking about the blue wires?
11:46 PM ve7it: I need to dig that board out.... I dont remeber much
11:47 PM _unreal_: blue wires?
11:47 PM _unreal_: oh ahh
11:47 PM _unreal_: white wire
11:47 PM _unreal_: white with red stripe
11:48 PM _unreal_: testpoint 14
11:53 PM ve7it: white with red strip is +25 to tp12 i think
11:55 PM ve7it: tp14 is the overtemp input to the pic pin 16
11:56 PM ve7it: solid red jumper
11:57 PM ve7it: I just was on the microchip site and tried to see if their cloud compiler would work.... doesnt seem to support the 30f series
11:59 PM ve7it: mplabX is so bloated... I dont really want to install it... might fire up one of my old boxes and see if I can load the old mplab and c30 compiler