#linuxcnc Logs

Oct 04 2019

#linuxcnc Calendar

01:08 AM t4nk-freenode: ah btw, Loetmichel, I used some tight-fitting plastic as a 'nut' on the threaded rod
01:12 AM t4nk-freenode: to keep the wear down
01:33 AM drdoc: t4nk-freenode: huh?? whut'd I do?
01:34 AM t4nk-freenode: hehe.. don't sweat it ;)
01:36 AM t4nk-freenode: gonna sleep on it, I got some nifty ideas, see if they work tomorrow
01:36 AM drdoc: man, it looks like I have the jitter under control.
01:37 AM t4nk-freenode: ? u had vibrations orsth?
01:37 AM drdoc: 3 hours in, max on the base the was under 6usec
01:37 AM drdoc: base thread
01:38 AM Wolf__: nice, where can I send one of these dell optiplex 745 so you can set me up with a low jitter setup :P
01:39 AM drdoc: you know, that was high on the list of possible systems for this
01:40 AM drdoc: if this Gigabyte board hadn't dropped in my lap.
01:40 AM Wolf__: I have 6 of them I picked up a couple weeks ago that were being tossed out
01:40 AM drdoc: oooh
01:41 AM drdoc: I'm just running the Stretch uspace install
01:42 AM Wolf__: core 2, 2gb ram, 256mb ATI x1300 and 5 of them have 150gb hd, one has 250, so not terrible
01:42 AM drdoc: I turned off all the power management in XCFE4 - I think those strings override the bios
01:44 AM Wolf__: hmm, so far I only tossed a old lcnc live cd in one of them and was getting ~35000 on the jitter
01:44 AM drdoc: 4GB RAM helped a lot. I was originally running a 128MB ATI X300, and when I replaced that with a 256mb card that helped
01:45 AM drdoc: yeah, I think optical-drive access Jack's the jitter waaay up on these old boards
01:45 AM Wolf__: these all have 256mb cards, so I should be good there
01:45 AM drdoc: cannibalize one for its memory
01:45 AM Wolf__: thats worth a shot
01:46 AM Wolf__: hmm DDR2, wonder if I have any leftovers from my older gaming rigs lol
01:46 AM drdoc: I also dropped a PCIe Intel NIC in and turned the onboard realtek off
01:47 AM Wolf__: this one is broadcom onboard nic
01:47 AM drdoc: this board came with 8GB of GSKill memory
01:47 AM Wolf__: https://www.dell.com/downloads/global/products/optix/en/opti_745techspecs.pdf small form factor
01:47 AM drdoc: yeah, the Broadcom is probably ok
01:48 AM drdoc: dude, I've read that PDF 8 times the last couple of weeks. ;-)
01:48 AM Wolf__: haha
01:48 AM drdoc: I was serious about that being a top choice
01:49 AM Wolf__: only pain in the ass is I only have one of the OEM DMS-59 cables
01:49 AM drdoc: anyway, I had to ditch the GSkill sticks. random lockups and, oddly, couldn't get through an install at all without corrupt data
01:50 AM Wolf__: so now I need to order a few adapters and hope they work
01:50 AM drdoc: what's A DMS-59?
01:51 AM Wolf__: some oddball dual video out connector that has the same shell as a DVI
01:51 AM Loetmichel: gnhihi... coworker doesent learn... third 1/8" twoflute that breakes off today... Al99,9 NEEDs some sort of cooling/lubricant to mill
01:51 AM drdoc: except it's 3-row 50-something?
01:51 AM Wolf__: yup
01:52 AM Loetmichel: he is so used to to AlMg3 (which can be milled dry) :-)
01:52 AM drdoc: yeah. I have those things
01:52 AM drdoc: Loetmichel: my last boss believed in cutting 316 dry
01:53 AM Wolf__: I dont lol
01:53 AM drdoc: I watched a 3-inch fly cutter turn orange
01:53 AM drdoc: and no, I wasn't running the mill
01:54 AM drdoc: anyhow, Wolf__
01:55 AM drdoc: on my rig, the preempt install gets much better rest results than the rtai
01:55 AM drdoc: like, 30% better
01:56 AM drdoc: I just hope all this translates into a working router...
01:57 AM Wolf__: nice, I’ll have to give that a go, I tried a mint preempt-rt on my mini itx system, but the hardware didn’t agree with that what so ever
01:58 AM drdoc: heh, yeah, I have a Supermicro D510 board that used to be my firewall. I tried the preempt livecd on it and the max jitter hot 150000 within a minute
01:59 AM Wolf__: jitters wasn’t the issue I had, nothing on the board wanted to work lol
01:59 AM drdoc: hah!
01:59 AM Deejay: moin
02:00 AM Wolf__: IIRC it was giving me video issues along with nic and some other things
02:00 AM drdoc: yeah, I've popped a few capacitors checking out all my old junk for this
02:00 AM drdoc: literally
02:00 AM Wolf__: this was a new board >.<
02:00 AM drdoc: oh man
02:00 AM Wolf__: too new I think lol
02:01 AM drdoc: so I built this router with an Arduino GRBL shield controller
02:02 AM drdoc: at 600in/minute, the motors run for an inch, then stop dead and whine for 2 seconds before finishing the run
02:03 AM Wolf__: too much speed or harmonics
02:03 AM drdoc: sorry, mm not inches
02:03 AM drdoc: the Arduino just isn't fast enough
02:03 AM drdoc: 30Hz is the recommended limit
02:04 AM drdoc: ..
02:04 AM Wolf__: ASRock Q1900-ITX Intel Celeron J1900 Motherboard / CPU / VGA Combo is what I did that last build on
02:04 AM drdoc: which I didn't find it tool I started having trouble
02:04 AM drdoc: I've read good things about the J1900 in general
02:05 AM drdoc: what interested are you running/going to run?
02:06 AM drdoc: by the way
02:06 AM Wolf__: IDK, only arduino based machine I have is a raps printer, which I have been thinking about redoing with a smoothie setup.
02:06 AM Wolf__: 2 mills, plasma table and maybe a router w/ LCNC
02:07 AM drdoc: I was looking earlier - 256mb Radeon HD5450 cards are going for $7 shipped on ebay
02:08 AM drdoc: I'm running a RADDS board on my printer. I like it a lot
02:08 AM Wolf__: one mill is done and runs, but its laughably small/over steppered, seig X1, mill 2 is a work in progress, seig x2 (sorta) built from all new parts, ball screws and a sewing machine servo motor for the spindle drive
02:09 AM Loetmichel: drdoc: problem is that pure alu is way to ductile and melts around the mill bit if you try to mill it dry.
02:09 AM drdoc: it uses socketed drivers, which I like
02:10 AM drdoc: Loetmichel: cutting any metal dry makes my skin crawl
02:10 AM Loetmichel: same with those "knetlegierungen" which are used for al extrusions
02:10 AM Loetmichel: nah, for all "cast" alu its ok, also for AlMg3 or similar "brittle" stuff
02:10 AM drdoc: and yeah, I've seen what happens to drills run dry in aluminum
02:10 AM Loetmichel: just the doughy stuff isnt so great
02:11 AM drdoc: they end up... fuzzy
02:11 AM Wolf__: oh forgot, I have a diode laser running on a Azteeg X5 GT running smoothie as well
02:12 AM Loetmichel: he is now standing at the router with a spray can of wd40...
02:12 AM drdoc: how do you like the Azteeg?
02:12 AM Loetmichel: its not a great oil, but for cooling alu its great (while expensive)
02:12 AM drdoc: Loetmichel: you just made me giggle
02:12 AM Wolf__: not bad, but has some shortcomings like lack of schematics
02:12 AM drdoc: oh, that's a problem
02:12 AM Wolf__: and some pinouts that dont work as expected
02:13 AM drdoc: I just like knowing that blowing a driver doesn't kill my board
02:13 AM Wolf__: like the pwm out for spindle control IIRC
02:13 AM drdoc: oh, hey, there's a new Asian controller that ribs smoothie
02:14 AM drdoc: Lurdge or something?
02:14 AM drdoc: they're interesting because they seem to have a coherent product line
02:16 AM Wolf__: *shrugs* I liked it for ease of setup vs ramps/arduino stuff, text file vs reuploading scrips and digging for commented out things, but feeding it on the other hand is just as much of a pain
02:17 AM Wolf__: part of the reason I haven’t messed with my 3d printer, right now it just works
02:19 AM drdoc: that's always a good reason to leave it alone
02:19 AM drdoc: I've been learning to print polycarbonate
02:20 AM Wolf__: I’ve had a re-arm board laying on my desk for over a year now lol
02:21 AM drdoc: pure PC is rock hard
02:21 AM drdoc: heh. I hadn't seen them
02:21 AM drdoc: there re-arm
02:21 AM Wolf__: http://www.panucatt.com/Re_ARM_for_RAMPS_p/ra1768.htm
02:21 AM drdoc: there's yeah, I just googled that
02:21 AM * Loetmichel has to remedie THAt: http://www.cyrom.org/palbum/main.php?g2_itemId=17511 then his two Ender3 are perfect
02:22 AM Loetmichel: and wont be fiddled with any more
02:22 AM drdoc: there's also a 32-but drop-in for the Arduino Uno
02:22 AM Loetmichel: i THINK i'll try some hardened steel nozzles, i have the vague feeling that the cheap chinese brass nozzles arent made well
02:23 AM Wolf__: I’ve been flirting with the idea of making my own nozzle/hotend
02:24 AM drdoc: Loetmichel: I had that problem, turned out to be heat creep in the heartbreak tube
02:24 AM drdoc: lol
02:24 AM drdoc: it WAS a heartbreak tube for a while
02:24 AM drdoc: but I meant heatbreak
02:24 AM Loetmichel: drdoc: in an Ender3? doubt it that it is heatcreep
02:25 AM drdoc: mine was an E3D v6 clone
02:25 AM Wolf__: I have a meter long rod of O1 tool steel, wonder how good of a nozzle I could make out of that
02:26 AM drdoc: O1 has terrible thermal transfer, if I remember correctly
02:26 AM Wolf__: that would only be for the tip
02:26 AM drdoc: yes
02:26 AM Loetmichel: hmm, i think stainless is better for that
02:27 AM Loetmichel: worse heat transfer IIRC
02:27 AM Loetmichel: the nozzle has to be conducting well
02:27 AM drdoc: take a look at Dyze's design
02:28 AM drdoc: I've pretty much decided that a lot of cheap brass nozzles is the answer, unless I'm doing something extremely precise
02:28 AM Wolf__: lol
02:29 AM Wolf__: I’ve never changed mine in 4? years now…
02:29 AM drdoc: that Dyze is half the size of an E3D, and it moves some freaking plastic
02:29 AM Loetmichel: drdoc: i think the problem with cheap brass nozzles is that the built quality is bad
02:30 AM drdoc: I have a set of cleaning needles for gauging the orifice
02:30 AM Wolf__: hmm shit, this printer is 5yrs old lol
02:30 AM Loetmichel: i had some with not concentric 0,4mm holes to the flat on the tip, i had some with crooked drills, i even had one that didnt seal against the heater block at all because the m6 thread was visibly crooked on the back end
02:30 AM drdoc: heh
02:30 AM Wolf__: guess I should order some nozzles
02:31 AM drdoc: yeah, I've seen some of all that
02:31 AM Wolf__: or order some brass rod stock and turn some
02:31 AM drdoc: I cull then pretty carefully
02:31 AM Loetmichel: Wolf__: i thought about that
02:32 AM Loetmichel: but my lathe is so cheap it has about 1mm misalignment between spindle and tailstock
02:32 AM Loetmichel: NOT good if you want to drill 0,4mm holes with tungsten carbide bits ;)
02:32 AM Wolf__: drill chuck on tool post
02:32 AM drdoc: does the ender use E3D style nozzles?
02:33 AM Loetmichel: i use the same nozzles in my Anet A8 and ender3, no idea what an E3D nozzle looks like
02:33 AM drdoc: what I really want to do is adapt a waterjet orifice to my Dyze
02:33 AM drdoc: my first printer was an A8
02:34 AM Loetmichel: https://www.ebay.de/i/283562499302
02:34 AM Loetmichel: those
02:34 AM drdoc: yes, I'm familiar
02:35 AM Loetmichel: funny thing is that the a8 prints better than the two enders at the moment ;)
02:35 AM drdoc: https://e3d-online.com/3mm-v6-nozzles
02:37 AM drdoc: I designed a v-slot x carriage for the A8, stiffened it up a lot
02:37 AM drdoc: then I sold the frame and built a new one
02:38 AM drdoc: crap
02:38 AM drdoc: it's 0230 here
02:38 AM drdoc: later, gentlemen
02:42 AM Wolf__: blah its only 0330 here lol
02:43 AM Loetmichel: 09:37 here... sitting at work ;)
03:03 AM drdoc: aw yeah
03:04 AM drdoc: 5 hours in, still under 6000ns
03:04 AM drdoc: that's with USB keyboard & mouse, ethernet on, 6 glxgears and a big dd job on loop
03:05 AM drdoc: Wolf__: I haven't really tuned it at all, just uninstalled pulseaudio and set isolcpus=1,2,3
03:05 AM drdoc: qand lapic
03:06 AM drdoc: if it keeps this up overnight I will be pleased
03:06 AM Wolf__: nice
03:07 AM drdoc: have to admit I'm a little skeptical of software stepping
03:07 AM drdoc: I'm just kind of taking y'all's word for it
03:07 AM Wolf__: works pretty ok on my first mill
03:07 AM drdoc: :-)
03:08 AM Wolf__: semi x1 with a pencil https://i.imgur.com/B5uhafo.jpg
03:08 AM Wolf__: s/semi/Seig
03:08 AM drdoc: nice
03:09 AM Wolf__: part made for the x2 https://i.imgur.com/fD7Z76M.jpg
03:10 AM drdoc: I had a chance to pick up a trashed Taig for not much money last year
03:10 AM drdoc: all the electronics were toasted
03:11 AM drdoc: I just couldn't cut loose the cash
03:11 AM Wolf__: using a horribly undersized machine that has crap rigidity https://i.imgur.com/kYDtEtW.jpg
03:12 AM drdoc: that's a lotta part for a little machine, man
03:13 AM drdoc: ok
03:13 AM drdoc: my head's gonna hit the keyboard soon.
03:13 AM drdoc: see y'all mañana
03:14 AM Wolf__: same here, sleep needed lol
04:22 AM Loetmichel: *gnhihi* i just decided to clean up my desk at work (because i didnt find a tool)... coworker comes by: "Ohhh! Michel! Do you feel well?" :-)
04:51 AM Loetmichel: *led test* OUCH!... yes, still working blue hig eficiency narrow angle led... shouldnt have set the PSU to 50mA though... *blink* nice yellow dot on my retina now :-)
05:05 AM Tom_L: morning
05:23 AM XXCoder: jthornton: https://images-ext-2.discordapp.net/external/ldenMp5ZXHVx7Kt9oa7OTfv53UV7k8aIK2yOkYKzgSY/https/i.imgur.com/36KfPYH.mp4 lol
05:23 AM XXCoder: short video
05:23 AM XXCoder: 14 seconds
05:47 AM jthornton: morning
05:52 AM XXCoder: yo
05:56 AM jthornton: chicken thinks it's a duck
05:56 AM XXCoder: yeah
05:56 AM XXCoder: looks like grew up with em
05:56 AM XXCoder: or secret agent
06:02 AM jthornton: yea I'd bet they grew up together
06:02 AM jthornton: about to move my main website over to dreamhost
09:24 AM jym: morning folks
09:27 AM Vq: Good evening jym
09:27 AM jym: hi
11:12 AM T_F_Skywalker: Anyone bother with DC Reactor/Chokes on their VFDs? For small 2.2Kw 220v spindles that is.
12:53 PM t4nk-freenode: so, suppose I would like to 'make a design' for my intermediary cnc.... what would be the simplest program to learn in order to be able to draw my machine? I have no experience with this at all, and the software should run on linux.. got any hints?
12:55 PM T_F_Skywalker: Well FreeCAD isnt super hard and it would translate well to other parametric design programs
12:56 PM T_F_Skywalker: lots of tutorials and its used by most of the big open source design firms like, adafruit, luzbot, prusa, etc...
12:56 PM t4nk-freenode: I think I got a version of FreeCAD installed even..
12:57 PM t4nk-freenode: I'll have a look at it, thnx ;)
12:58 PM T_F_Skywalker: np, I hope you find it useful.
01:03 PM * t4nk-freenode is watching an introduction vid right now ;)
02:00 PM FinboySlick: t4nk-freenode: Parametric CAD is quite fun once you get into it.
04:20 PM Deejay: gn8
04:25 PM t4nk-freenode: hehe... so .. watched a couple of tutorials..
04:25 PM t4nk-freenode: finally feel up to firing up freecad..
04:26 PM t4nk-freenode: and, like álways... I can't even draw a friggin Line! ;)
04:30 PM t4nk-freenode: ah ok, I seem to need to hold ctrl ;)
04:30 PM * t4nk-freenode is off then; designing magnificent ehhh.. well anyhow ;)
04:40 PM * jthornton made it to Murry Ky but almost ran out of gas on the Spyder
04:48 PM Tom_L: you and that Spyder have quite a history
04:52 PM jthornton: yea the scary moment was the I310 bridge over the Mississippi river and the engine tearing itself apart
04:53 PM XXCoder: lol
05:12 PM drdoc: jthornton: is there any material benefit to LCNC 2.8 over 2.7?
05:13 PM drdoc: I hate to discuss linuxcnc here, but you know...
05:13 PM jthornton: some Mesa cards are not supported in 2.7 and dual motor gantries are not supported in 2.7 but other than that not much
05:14 PM jthornton: yea sometimes we must talk about LinuxCNC!
05:14 PM * jthornton goes down to debug the Spyder and put the cover on
05:15 PM XXCoder: but whats linuxcnc? ;)
05:15 PM drdoc: "dual motor gantry" - so with 2 Y steppers I'd need v2.8?
05:16 PM drdoc: XXCoder: as far as I can determine, it's GRBL for masochists
05:16 PM drdoc: :-p
05:16 PM XXCoder: lol
05:21 PM drdoc: is 2.8 stable? The wiki docs on 2.8 are all about 2.7...
05:22 PM sync: stable enough
05:23 PM drdoc: ok
05:25 PM jym: 2.8 + prozac stable
05:25 PM jym: kidding (use thorozine instead =)
05:26 PM _unreal_: t4nk-freenode, I'd suggest designspark over freecad
05:27 PM _unreal_: designspark is free and very easy to use
05:27 PM _unreal_: few learning curves
05:29 PM jym: freecad is free
05:30 PM _unreal_: and a MOTHER of a learning curve
05:33 PM jym: Is designspark for linux?
05:35 PM t4nk-freenode: I'm not planning on using windows at all
05:35 PM jthornton: drdoc, yes dual motor gantries you want to use >= 2.8 as it handles homing properly
05:35 PM jthornton: drdoc, don't go to the wiki for docs
05:35 PM jthornton: read the real docs
05:36 PM jthornton: the wiki is user maintained and mostly out of date
05:38 PM _unreal_: jym, I wish they would make a linux vesrion
05:38 PM _unreal_: I have a DESKTOP "gaming" pc setup as my cad system
05:39 PM _unreal_: drdoc, do you have any other phtoos you could post of that extrusion cnc?
05:39 PM _unreal_: I'm trying to see if I have enough crap extrusion to maybe build a nice small rig out of it.
05:39 PM _unreal_: crap=scrap
05:40 PM jym: scrap = crap
05:40 PM jthornton: one mans crap is another mans scrap
05:40 PM _unreal_: and yes I DID get them out of the dumpster
05:41 PM jthornton: it's even better if you saved it from the trash pile
05:41 PM _unreal_: jthornton, oh the stuff I get from work. working on the luxury yachts
05:42 PM _unreal_: Oh I screwed up rather good
05:43 PM _unreal_: I got a 1" starboard scrap that I'm supposed to use as the main/connecting body on this machine I'm building for my daughter. and I just discovered I designed it for 3/4" material but I cut 1" scrap material...
05:43 PM _unreal_: I was wondering why it was not fitting right.
05:43 PM XXCoder: doh!
05:43 PM _unreal_: speaking of give me a few and I'll upload a photo of how it looks
05:44 PM _unreal_: uploading now will be available in like 2min
05:45 PM _unreal_: WOW that was fast
05:45 PM _unreal_: https://drive.google.com/open?id=1Q_RDyG_dA6hSk077hA2W__IGiSLXXiVy
05:45 PM _unreal_: https://drive.google.com/open?id=1QZydBdrzgvEeSeUNslRsTQ7cvXA6og3l
05:45 PM _unreal_: what cha think?
05:46 PM XXCoder: is it bedflinger?
05:46 PM jthornton: looks pretty sturdy for sure
05:46 PM XXCoder: yeah
05:46 PM _unreal_: STURY FOR SURE
05:46 PM _unreal_: the base is not screwed together yet
05:46 PM XXCoder: ahh ok
05:46 PM _unreal_: I'm trying to figure out what I want to do.
05:46 PM jthornton: not sure where the Y axis is from that photo
05:47 PM _unreal_: I'm thinking I may just setup a mill job and FACE the top removing 1/4" :(
05:47 PM _unreal_: the Y axis is the Vertical arms
05:47 PM _unreal_: that sweep back
05:48 PM _unreal_: and go to the X axis which the Z rides on
05:48 PM XXCoder: second picture is clearer jt
05:48 PM XXCoder: interesting pictures :)
05:48 PM jthornton: ah missed that ink
05:48 PM jthornton: link
05:49 PM _unreal_: ya I started to fit it together and I'm like WTF there should be a 1/8th gap between the bed and the top of the Y axis liner retainers
05:50 PM jthornton: what material is it made of?
05:50 PM _unreal_: then I said wait a tick. ran to my cad. did a quick mesure and sure enough 19.05 not 25.4
05:50 PM _unreal_: Starboard
05:50 PM _unreal_: HPDE
05:50 PM _unreal_: VERY VERY strong
05:50 PM jthornton: cool
05:51 PM _unreal_: will bow if given the chance but in general VERY strong
05:51 PM XXCoder: i do want to try make something with that material evenually
05:51 PM _unreal_: its used a lot on boats
05:51 PM _unreal_: XXCoder, go to home depot or lows
05:51 PM _unreal_: you cna get some there OR just order some a small sample
05:52 PM XXCoder: yeah though not able to mill anythinf for a while
05:52 PM _unreal_: XXCoder, https://drive.google.com/open?id=1L10ftDeqfCJ5hSjrIwimFQASXfZDaQEj
05:52 PM _unreal_: https://drive.google.com/open?id=1LFl4v5AcZk8ed-yGZLsisnEbMLLkKv7Q
05:53 PM XXCoder: cool :)
05:53 PM _unreal_: XXCoder, I need to set it up quick and I can snape a photo of the vac plate working
05:53 PM _unreal_: maybe even a 5second video
05:54 PM XXCoder: heh I may run big machines but I always enjoy small cnc builds
05:58 PM _unreal_: uploading video
05:58 PM _unreal_: You will love this
06:01 PM _unreal_: here is my mini vacuum pump https://drive.google.com/open?id=1QlahYDQvvrCNHXYuz4LhCcG2CIWl1_2A
06:02 PM _unreal_: XXCoder, you there?
06:02 PM XXCoder: that toys enough to hold part for milling eh
06:02 PM _unreal_: https://drive.google.com/open?id=1QbNDFX0OICUy7FteExP7jd0FW6Z8xEst
06:02 PM _unreal_: Thats NO toy
06:03 PM _unreal_: originally it was a $375 medical pump
06:03 PM _unreal_: its got a brushless motor
06:03 PM XXCoder: ah plenty of power
06:03 PM _unreal_: can pull 25Hu
06:03 PM _unreal_: hg
06:03 PM _unreal_: they are dirt cheap and run at different DC voltages
06:04 PM _unreal_: mine is a 12v
06:04 PM XXCoder: cool :)
06:04 PM _unreal_: I did a RIG a few weeks ago with tacky tape and plastic etc.... and it CRUSHED it down easy
06:04 PM _unreal_: took a while to draw out the air
06:04 PM _unreal_: but had plenty PLENTY of vacuum power
06:05 PM _unreal_: as long as there are no leaks
06:05 PM _unreal_: XXCoder, they sell for $5 on average
06:05 PM XXCoder: cool though I'll be using clamps not vacuum hold
06:05 PM _unreal_: I made some vac plates for work. much bigger one's
06:06 PM _unreal_: they are the freaking BOMB, suck it down to the table then put the part on top sick it down
06:06 PM _unreal_: no clamps no nothing
06:06 PM _unreal_: and crazy holding power
06:06 PM XXCoder: how fast does it create vacuum?
06:06 PM XXCoder: you could make vacuum former if its fast enough
06:06 PM _unreal_: depends on the volume
06:06 PM _unreal_: oh god no
06:06 PM _unreal_: vacuum former needs a vacuum cleaner freaking shop fac
06:07 PM XXCoder: lol ya
06:07 PM _unreal_: or a vacuum tank
06:07 PM XXCoder: vac former is something I wanna try someday
06:08 PM _unreal_: but these little pumps I have are sweet. I use a small 2amp 12v wall wart and they run all day
06:08 PM _unreal_: no heat
06:09 PM XXCoder: that is quite effective then as it means no wasted power.
06:09 PM XXCoder: not surpising as its orginially really expensiove and medical which may mean hours of runtime
06:10 PM _unreal_: its rated for 10k MTF
06:10 PM _unreal_: they are "used" hence $5
06:11 PM _unreal_: but then again for all I know they are brand new and were NEVER used
06:11 PM _unreal_: could lots of med hardware that was recalled and scrapped
06:11 PM _unreal_: the latter is my bet
06:12 PM XXCoder: probably
06:12 PM XXCoder: probably from big box that goes beep
06:12 PM _unreal_: even if that was the case I'm sure they do not run that kind of hardware all the way till its MFT
06:12 PM _unreal_: MTF
06:13 PM XXCoder: mtf?
06:14 PM _unreal_: mean time till-falure
06:14 PM XXCoder: ahh
06:14 PM _unreal_: meaning if something has a 100,000 hours of operation time, mtf. it should last for 100,000 hours before failing
06:15 PM _unreal_: if used with in manufactures specs
06:15 PM _unreal_: so there are 8,760hr in a year.
06:16 PM _unreal_: I'm sure most of those devices are used for at least 50% of there MTF
06:16 PM _unreal_: do to the 10k hours mtf
06:17 PM XXCoder: im pretty sure in some cases its hard to loog hours so they just change part in probility rather than actual hours
06:17 PM XXCoder: so it could be still unused but change anyway
06:17 PM _unreal_: nonsense
06:18 PM _unreal_: most if not all medial equip that would use a device like that will have a clock
06:18 PM _unreal_: I use to be a nurse and a medtech
06:18 PM XXCoder: oh interesting
06:18 PM _unreal_: I also use to work for the jackson labratory www.jax.org
06:18 PM _unreal_: for many years
06:19 PM XXCoder: so did you make any boxes that do nothing but beep? ;)
06:19 PM _unreal_: so ya that kind of a pump has speed control and a tech signal in it
06:20 PM _unreal_: no I delt with a lot of sick ill and old people, wiped a lot of asses changed bandages and passed meds day in day out. and said FUCK THIS
06:20 PM _unreal_: and the postmortem was not my fav
06:21 PM _unreal_: So you like that vac plate?
06:21 PM XXCoder: btw this is where im joking about beeping box from https://www.youtube.com/watch?v=arCITMfxvEc
06:21 PM XXCoder: yeah pretty cool
06:21 PM _unreal_: its made with starboard
06:21 PM XXCoder: whats you using for covering unused areas when vac hold a part
06:22 PM _unreal_: ?
06:22 PM _unreal_: that vac plate is only 2x2"
06:22 PM _unreal_: the rubber gasket
06:22 PM _unreal_: so nothing
06:22 PM XXCoder: ah so not likely to have anything smaller than that
06:22 PM _unreal_: right
06:22 PM _unreal_: its so I can do edge profiling
06:23 PM _unreal_: or drilling on something
06:23 PM _unreal_: or just general simple milling on small stuff
06:23 PM _unreal_: slap it down. edge probe it so I can align
06:23 PM _unreal_: and stat milling
06:23 PM _unreal_: works great. I can give you the Gcode if your interested
06:24 PM XXCoder: nah while its cool i dont use vacuum hold
06:25 PM _unreal_: ;) not yet
06:26 PM _unreal_: I find it good for small stuff
06:26 PM _unreal_: and REALLY good for work parts that I wont want to damage the backside but can use the bakcside for suction
06:28 PM _unreal_: so I dont have to find a planket and clamp it etc...
06:28 PM _unreal_: also saves me from having to move clamps constantly
06:29 PM _unreal_: when grinding
06:29 PM XXCoder: lol true
06:30 PM _unreal_: the plate I made for work at is 7"x10" is great
06:30 PM _unreal_: simple valve setup. one for the bottom half one for the top half
06:30 PM _unreal_: so I can suck it down to the work table.
06:30 PM _unreal_: then put the part on it.
06:30 PM _unreal_: no clamping needed
06:31 PM _unreal_: takes the setup I did with one of those little vac pumps 5 seconds to get a good draw down on the top or bottom
06:31 PM _unreal_: as long as I get a good seal
06:31 PM _unreal_: then its rock solid
06:31 PM _unreal_: I'm thinking of making a version for holding a drill
06:32 PM _unreal_: like a RING or something
06:32 PM _unreal_: making one that would work like the magnet drill press
06:33 PM _unreal_: put it in place flip the switch and like the magnetic version zing........ drill press on and in place
06:57 PM _unreal_: its so quiet in here
06:57 PM XXCoder: yeah often is
06:58 PM XXCoder: and thats great idea, ring fior drilling without killing vacuum
06:59 PM _unreal_: ya I'm thinking about making some kind of a vacuum plate setup so I could attach it to a mini drill pres
06:59 PM _unreal_: HELL
06:59 PM _unreal_: I could build something like that and put an IRON plate in it for a magnetic one...
07:01 PM _unreal_: well I was thinking about taking my daughter to the movies but there is nothing for kids at the theaters right now
07:01 PM _unreal_: litteraly
07:01 PM _unreal_: heh
07:02 PM XXCoder: drat
07:42 PM drdoc: _unreal_: I can take pics this evening, but essentially it's 750mm of V-slot C-beam, 1 500mm and one 225mm piece,
07:43 PM drdoc: 6 575mm sticks of v-slot 2020 that I substituted for the original design's 2 C-beam pieces, and 3 500mm 2020 base braces
07:44 PM drdoc: did I post the original design's build sheet?
07:45 PM drdoc: http://www.docsbox.net/Build_Manual.pdf
07:46 PM Wolf__: just dont supersize that design, 1.5m acme leads dont work well
07:47 PM drdoc: heh
07:48 PM drdoc: if I had the money it'd be 650mm Y beams instead of 575mm
07:49 PM drdoc: I had all that extrusion lying around, which defined the size
07:49 PM drdoc: https://openbuilds.com/builds/c-beam-sphinx.3605/
07:50 PM drdoc: that's the guy who came up with the version in that build manual
07:50 PM drdoc: I just took a lot of liberties with it
07:50 PM Wolf__: I’m probably going to pull the sphinx parts off my build and re-build the plasma with rack drive or belts, leaning towards rack tho
07:51 PM drdoc: Hmmm
07:51 PM drdoc: that's an idea I hadn't looked at
07:51 PM drdoc: rack drive I mean
07:51 PM Wolf__: common on the larger machines
07:52 PM drdoc: the thing is, I can *print* those parts
07:53 PM Wolf__: hmm, guess you could, not sure how well they would wear or how accurate the travel would be
07:54 PM Wolf__: my problem is 1.5m long Y axis, too much to print
07:56 PM XXCoder: theres also double belt system
07:56 PM Wolf__: and if I go all gear rack drive, I can swap my X axis out to 1.5m as well
07:58 PM XXCoder: like this https://i.pinimg.com/originals/35/cf/ea/35cfeaddf2602599e6c4ddafb946809f.jpg
07:58 PM XXCoder: though that belt is too thin! and wheels too wide
07:58 PM XXCoder: you want belt to take more than 50% of gear surface
08:01 PM Wolf__: yeah, looked at that setup, thought about it, but that big of a gantry I worry that the belt may stretch with high acceleration
08:01 PM XXCoder: that belt sucks, its supposed to be used for timing only
08:02 PM XXCoder: theres thicker and better ones that resist streaching
08:02 PM XXCoder: thicker, wider, and uncut
08:03 PM Wolf__: width would be a problem on that 2020 makerbeam
08:05 PM XXCoder: maybe? dunno. im not sure what belts is avilible
08:06 PM XXCoder: maybe theres similiar width to that timing belt but made from more streach resistant stuff
08:12 PM XXCoder: https://www.cnczone.com/forums/linear-and-rotary-motion/368128-cnc.html maybe more info
08:13 PM XXCoder: better ones https://www.cnczone.com/forums/mechanical-calculations-engineering-design/99096-cnc.html
08:13 PM Wolf__: one other thing thats pulling me to gear rack is I can then break the machine down somewhat easy if I need to move it
08:14 PM XXCoder: they said one of belts have steel it'd be very strong
08:15 PM XXCoder: old but polytech site still exists
08:17 PM XXCoder: https://shop.polybelt.com/Truly-Endless-Belts-Polyurathane_c27.htm this section is interesting
08:17 PM XXCoder: and not very expensive
08:21 PM Wolf__: not seeing much that would work for me
08:25 PM XXCoder: theres belts thats as narrow as those timing belts
08:25 PM XXCoder: but far stronger
08:27 PM XXCoder: ah but there is not just lengths but a loop hmm
08:27 PM Wolf__: they have open end rolls
08:27 PM XXCoder: oh missed em I guess :)
08:28 PM Wolf__: but then need to figure out what tooth profile will mesh with itself, then source the drive pulleys
08:28 PM XXCoder: yeah
08:28 PM XXCoder: https://shop.polybelt.com/130XL025-Poly-Steel-Belt-65-Tooth-B130XL025FPS.htm
08:28 PM XXCoder: dunno if thats self meshing
08:29 PM XXCoder: https://shop.polybelt.com/images/1210975297686-1590108820.GIF more direct picture link heh
08:29 PM Wolf__: helical pitch rack is moar simple
08:30 PM XXCoder: does it have more backlash or less?
08:30 PM XXCoder: and yeah looks simple
08:30 PM Wolf__: I would think less backlash
08:31 PM Wolf__: application matters as well, its a plasma cutter so things are going to be weld up fitment, not bearing fits
08:31 PM XXCoder: isnt belts faster?
08:33 PM Wolf__: how do you think 5 foot of belt is going to react
08:36 PM XXCoder: hmm
08:36 PM XXCoder: even if it was very stong theres probably some movement with rapids
08:39 PM _unreal_: looking
08:44 PM _unreal_: going by those plans I have NO wears near enough extrusion on hand
08:44 PM _unreal_: sigh
08:52 PM XXCoder: oh well heh
08:55 PM _unreal_: its also a different type then what I have on hand
08:55 PM _unreal_: extrusion wise
09:17 PM roycroft: if the belt indexes to the sheaves it should perform fairly well
09:18 PM roycroft: as in a typical serpentine belt that one finds in a vehicle to drive the alternator, water pump, etc.
09:18 PM roycroft: those tend to be pretty long
09:18 PM roycroft: a vee belt would not index very well
09:30 PM drdoc: Wolf__: a printed rack & gear system would have less lash than the cheap lead nuts I'm running, accuracy is a matter of setting the printer correctly, and wear is just design and material
09:31 PM drdoc: not optimal, for sure, nor even close to the quality of a good rack system
09:31 PM drdoc: but essentially free.
09:32 PM Wolf__: vs the $100 per axis rack I’m looking at
09:32 PM drdoc: you can do 1.5m for $100¿
09:33 PM Wolf__: https://www.rovercnc.com/collections/rack-and-pinion/products/precision-helical-rack-and-pinion-kit-modula-1-0-17x17x1500mm
09:34 PM drdoc: that's not awful at all
09:34 PM drdoc: still about $98 more than I can afford right now.
09:39 PM t4nk-freenode: and $85 more than we could afford together :|
09:42 PM Wolf__: responsible me, cant afford it, the meh screw it side… np lol
09:46 PM Wolf__: I also need my plasma machine running
09:47 PM drdoc: Wolf__: one of the best things about having a 3d printer is prototyping stuff like that to see if it's worth saving nickels
09:48 PM Wolf__: yup, I use mine for rapid test parts and some stuff we use on customer trucks
09:48 PM drdoc: a printed rack & pinion wouldn't be a permanent solution, but would make it cheap to try and to refine the design
09:49 PM Wolf__: I do that in cad usually
09:50 PM Wolf__: $100K+ garbage truck with 3d printed parts holding the switches in the dash https://i.imgur.com/IcDmddt.jpg
09:51 PM drdoc: heh, yeah
09:51 PM drdoc: I've printed lock linkages for a friend's '80s Corolla
09:52 PM Wolf__: https://i.imgur.com/jqcxUnf.jpg
09:53 PM Wolf__: first truck I hacked a alum plate in to the dash to hold the switches in, looked like crap to me https://i.imgur.com/aCKjTpC.jpg
10:06 PM Wolf__: drdoc: heres one you might like, 3d printed PETG change gears for my lathe https://i.imgur.com/pGygdsb.jpg
10:29 PM drdoc: nice!
10:30 PM drdoc: PETG is perfect for gears.
11:26 PM Wolf__: dammit drdoc now ya got me wondering how hard it would be to cad up some gear racks and how long it would take to print 4.5m of it
11:40 PM drdoc: 1) not long at all, it's probably already up on grabcad
11:40 PM drdoc: 2) a loooong time
11:41 PM drdoc: dayum
11:42 PM drdoc: that box is 6.5 hours into latency-test, with 12 glxgears and 2 memory-to-disk dd's running
11:43 PM drdoc: max jitter on the base thread is 3390ns
11:43 PM * drdoc can live with this
11:44 PM Wolf__: should be pretty good
11:45 PM drdoc: should be cabable of a lot faster than the machine
11:45 PM drdoc: capable
11:47 PM Wolf__: this is my one stepgen box https://i.imgur.com/VdPduXL.jpg
11:53 PM drdoc: what's the PC?
11:53 PM Wolf__: some home built thing I did like 12yrs ago or something
11:54 PM drdoc: :)
11:55 PM drdoc: I'd really like to find a hi-res photo of a parallel-port breakout board
11:55 PM * Wolf__ looks around his desk
11:56 PM drdoc: the chinese "5-axis Mach3 Breakout Board" looks fishy somehow
11:58 PM Wolf__: https://i.imgur.com/qVo3XbT.jpg