#linuxcnc Logs

Mar 18 2019

#linuxcnc Calendar

03:58 AM Deejay: moin
04:02 AM pink_vampire: hi
04:02 AM XXCoder: yo
04:02 AM pink_vampire: my gcode talk to the pyvcp!
05:08 AM jthornton: morning
05:11 AM XXCoder: yo
05:30 AM Tom_L: morning
05:31 AM jthornton: morning
05:31 AM Tom_L: https://www.falstad.com/circuit/circuitjs.html?cct=$+1+0.000005+5.023272298708815+64+7+50%0Aw+112+192+112+224+0%0Ac+112+224+112+288+0+3e-7+5.91544193065722%0Ag+112+288+112+304+0%0AR+240+64+208+64+0+0+40+12+0+0+0.5%0A165+176+96+192+96+2+0.0005914850445612658%0Aw+240+64+304+64+0%0Aw+304+64+304+128+0%0Aw+352+160+304+160+0%0Aw+352+160+352+32+0%0Ar+112+192+112+32+0+10000%0Aw+160+192+176+192+0%0Aa+400+256+464+256+8+12+0+1000000+5.91544193065722+6.78374999
05:31 AM Tom_L: woah
05:31 AM Tom_L: never seen that before
05:32 AM jthornton: wtf was that?
05:32 AM Tom_L: http://tinyurl.com/y35wsrd5
05:32 AM Tom_L: was supposed to be that
05:33 AM Tom_L: thought it was kina cool
05:33 AM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/thread_mills/Mill_holder6.jpg
05:33 AM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/thread_mills/Mill_holder7.jpg
05:33 AM Tom_L: finished those up last night
05:34 AM Tom_L: one program
05:34 AM jthornton: damn inkscape sure messes up your monitor
05:35 AM Tom_L: i seldom use it
05:35 AM Tom_L: never took the time to figure it out
05:48 AM jthornton: Mediterranean herbs thrive in nutrient poor soils, so how do you make nutrient poor soil lol
05:48 AM * Loetmichel is sitting at his desk sorting screws. knocked a box of 2000 M3*4 stainless over... on THAT desk... -> http://www.cyrom.org/palbum/main.php?g2_itemId=17304&g2_imageViewsIndex=1 :-)
05:51 AM jthornton: clean up on aisle 6!
06:27 AM Loetmichel: nearly done sorting already... :-) -> http://www.cyrom.org/palbum/main.php?g2_itemId=17331&g2_imageViewsIndex=1
06:28 AM XXCoder: wow i can see color of table top!
06:28 AM XXCoder: its... greenish?
06:44 AM Elmo40: Loetmichel, was that a 'make work' project? ;-)
06:44 AM XXCoder: lol
06:44 AM XXCoder: doubt he needs more work!
06:45 AM Elmo40: everyone needs more work!
06:45 AM XXCoder: nicely lined up lol
06:45 AM Elmo40: get married. it piles up real quick
06:45 AM Elmo40: honey-do lists... weekends are not for resting. that is a myth.
06:46 AM Loetmichel: Elmo40: yes
06:46 AM Loetmichel: XXCoder: its an ESD mat
06:46 AM Loetmichel: grounded
06:46 AM XXCoder: yeah i wont be married. no thanks
06:46 AM XXCoder: interesting
06:57 AM Loetmichel: soo, finished sorting... that was a nice game of "2000-pick up" :-)
06:57 AM Loetmichel: now to something a bit more productive ;)
06:57 AM XXCoder: lol https://www.youtube.com/watch?time_continue=1&v=x5X6Gp-XMEs
07:14 AM * Loetmichel is just eating a pack of "BW-Panzerplatten" (german army bisquits)... forgot to order lunch AGAIN.
07:21 AM Elmo40: XXCoder, well, what more do you need?
07:22 AM Elmo40: 3D printing is the most overkill game I know of. People using 4080 aluminum extrusion... for nothing!
07:22 AM Elmo40: their prints are any better or made any faster than a $150 plastic i3 clone.
07:23 AM * Loetmichel is just reading the nutrition label on those biscuits... ouch, that will go driectly to my hips: http://www.cyrom.org/palbum/main.php?g2_itemId=10097
07:24 AM Elmo40: LoL
07:28 AM Elmo40: XXCoder, or were you laughing at the non-genuine windows pop-up? :-P
07:36 AM rmaw: I just bought a $200 ender 3 and its fine, when your squidging liquid plastic together the tolerance on your can be pretty loose
07:37 AM rmaw: that wood one would prob be pretty solid its so small
08:12 AM Elmo40: true. it would be fairly rigid. the pen sliders, though... they wont be.
08:13 AM Elmo40: but it doesnt move much.
08:13 AM Elmo40: and plastic is NOT accurate.
08:16 AM gregcnc: who works in one of these? https://bn.craigslist.org/bfs/d/ogden-office-free-standing-air/6843888603.html
08:19 AM miss0r2: etf lol
08:19 AM miss0r2: wtf*
08:20 AM Loetmichel: Elmo40:the pen sliders are just superficial
08:20 AM Loetmichel: at least in the y axis
08:20 AM Loetmichel: the two spindles with brass nuts are way more rigid than the sliders
08:21 AM Elmo40: true
08:22 AM Elmo40: i like the dvd laser drive
08:22 AM Elmo40: that is functional
08:26 AM * Loetmichel used steppers from 5.25" floppy drives back in his first CNC
08:27 AM Loetmichel: -> http://www.cyrom.org/palbum/main.php?g2_itemId=2859&g2_imageViewsIndex=1
08:27 AM Loetmichel: acrylics for chassis wasnt my brightest moment though ;)
08:29 AM miss0r2: I think its cute :) Still a few factors better than the generic chinesium :)
08:29 AM Loetmichel: back then there WAS no chinesium
08:29 AM Loetmichel: that was in 1995 IIRC
08:29 AM miss0r2: sure there was.. but it was all bamboo, and they didn't export it yet :)
08:30 AM Loetmichel: here in europe i meant
08:30 AM miss0r2: Indeed
08:39 AM Elmo40: '[;
08:49 AM Loetmichel: got better over time though: http://www.cyrom.org/palbum/main.php?g2_itemId=4935&g2_imageViewsIndex=1
08:49 AM Loetmichel: thats 1500mm by 1020mm by 160mm travel... ;)
08:50 AM Loetmichel: and surprisingly rigid for "Wood":-)
09:25 AM SpeedEvil: Make those sidepieces a box beam and the back of the motor support one too, even out of 1/2" ply, and make it a lot more rigid in two axes and rotation
09:25 AM SpeedEvil: But it may be fine for its intended app.
09:45 AM fdarling: has anyone used at_pid (auto-tuning PID)? I have some questions about P/I/D vs P/I/FF1 and the scaling of output to user units per second
09:49 AM pcw_home: For velocity mode servos FF1 is easy to calculate so no need to guess
09:50 AM fdarling: pcw_home: what about for current mode servos?
09:50 AM pcw_home: 0 FF1 for torque mode
09:51 AM pcw_home: FF2 dependent on inertial load
09:51 AM pcw_home: velocity mode typically needs no D, torque mode does
09:52 AM pcw_home: torque mode also typically needs higher servo thread rates (since you need to close the velocity loop in LinuxCNC)
09:54 AM fdarling: pcw_home: I have several machines, most of them have brushed DC servos that operate in torque mode I believe (the amplifiers definitely don't handle any feedback...) but one of my machines has Yaskawa servos/drives and I think it takes an analog *velocity* signal not torque signal
09:54 AM fdarling: pcw_home: the Yaskawa one is what I'm currently worried about tuning
09:55 AM fdarling: pcw_home: there are several pages online about tuning PID for servos in LinuxCNC, which one do you recommend?
09:55 AM Loetmichel: SpeedEvil: you mean like this? -> http://www.cyrom.org/palbum/main.php?g2_itemId=11205&g2_imageViewsIndex=1
09:55 AM pcw_home: It would be odd to have a machine of the vintage that used brushed motors without tachometer feedback
09:56 AM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=11172&g2_imageViewsIndex=1
09:56 AM Loetmichel: :-)
09:56 AM fdarling: pcw_home: well... call my stuff odd then ;-)
09:56 AM pcw_home: what are the drives?
09:56 AM SpeedEvil: Loetmichel: yes.
09:57 AM Loetmichel: SpeedEvil: already corrected in the "new" construction... the first pic was my fist BIG machine
09:57 AM SpeedEvil: Loetmichel: if the above is the same item, :)
09:57 AM fdarling: pcw_home: guess what, I bought cncwiki.org :-) https://www.cncwiki.org/index.php?title=Elmo_SSA_Series_Brushed_DC_Servo_Amplifiers
09:57 AM SpeedEvil: ah
09:57 AM SpeedEvil: fair enough
09:57 AM Loetmichel: no, its a second machine
09:58 AM fdarling: pcw_home: one of my machines has custom potted locked antiphase drivers on the back of the brushed DC motors, so it's taking a 20kHz PWM signal that must have a duty cycle that isn't 0% or 100% and directly driving the H-bridge off that
09:58 AM Loetmichel: i did a lot of "testing" on the first one... including using bicycle chains for the stepper-> ballscrew coupling
09:58 AM Loetmichel: worked "so lala"
09:58 AM pcw_home: so the elmo drives are either torque or velocity mode
09:59 AM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=4582&g2_imageViewsIndex=1
09:59 AM fdarling: pcw_home: yes, but in my case the Baldor servos they are attached to do not have tachometers, only encoders. The Elmo drive doesn't deal with encoders and the drives are configured for current mode
09:59 AM Loetmichel: was loud and not really precise
09:59 AM Loetmichel: in the end i got back to using timing belts
10:00 AM pcw_home: a PWM drive (voltage mode) is tuned somewhere between torque and velocity mode
10:00 AM Loetmichel: and also timingbelts for the sync in the back of Y
10:00 AM fdarling: pcw_home: I am working on populating that wiki with information about servos, servo drives, servo power supplies, and of course Mesa cards and LinuxCNC itself
10:00 AM Loetmichel: it was a "königswelle" beforehand: http://www.cyrom.org/palbum/main.php?g2_itemId=4594&g2_imageViewsIndex=1
10:01 AM pcw_home: for torque mode the more D you can get the tighter the tuning (and you can get higher D at higher loop rates)
10:02 AM Loetmichel: now its two timing belts (couldnt get a long enough one) and a central tensioner: http://www.cyrom.org/palbum/main.php?g2_itemId=7080&g2_imageViewsIndex=1
10:02 AM pcw_home: so for torque mode I set a small stable P value than run D up as high as possible (until it get too crunchy/buzzy)
10:02 AM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=7086&g2_imageViewsIndex=1
10:02 AM Loetmichel: worked WAY better
10:03 AM fdarling: pcw_home: what servo thread rate would you recommend? I am using an Ethernet based card by the way
10:03 AM pcw_home: that makes it a bit harder, as you probably want at least 2 KHz for torque mode drives
10:04 AM pcw_home: some hosts are ok at 4 KHz with Ethernet but typical low power hosts are not
10:04 AM fdarling: pcw_home: the 7i77 isn't isolated from the FPGA card right? only the field I/O?
10:05 AM pcw_home: no the encoder/analog is not isolated (If I did it again I would isolate the analog section)
10:05 AM pcw_home: we do have a isolator for the 7I77
10:06 AM fdarling: pcw_home: I saw that, there was something about having to compensate for skew or something
10:06 AM pcw_home: if the PC is in the control cabinet its usually not an issue with the PCI/PCIE cards
10:07 AM fdarling: pcw_home: the PC is currently a Dell Optiplex 755 sitting on a desk near it, I'm worried about having a machine with 208VAC 3-phase that uses ground as a neutral being hooked to it :-S
10:07 AM pcw_home: but occasionally if the PC in remote you get ground loops (especially with drives that dont have differential inputs)
10:07 AM pcw_home: PC is remote
10:07 AM fdarling: pcw_home: although that machine is the velocity one, it's the others that use torque mode
10:08 AM pcw_home: yeah torque mode tuning is very different, like I said its all in how much D term you can use
10:08 AM fdarling: pcw_home: how does one calculate FF1 for velocity mode?
10:09 AM pcw_home: (or how much P term you can use in a velocity loop if you use nested PID loops in LinuxCNC)
10:09 AM pcw_home: I think the easiest way is to measure or calculate the machine velocity at 10V
10:10 AM fdarling: pcw_home: in my case the notes for the original controller do tell me what speed the 10V signal results in, it was calibrated by the machine tool builder
10:10 AM pcw_home: use that number as the output scale (so the PID output is scaled in machine units per second)
10:10 AM pcw_home: then FF1==1.0
10:10 AM fdarling: *notes do, missed a word there
10:11 AM fdarling: pcw_home: I was really confused by the PID output limit and scale vs the 7i77's output scale and min/max
10:13 AM pcw_home: if you get say 5 IPS as the velocity at 10V the min_limit = -5 max_limit = 5 maxscale = 5
10:14 AM fdarling: pcw_home: the terminology confuses me, what does it mean by "limit" in this context? At first I thought it meant the voltage output bounds, like -5 to +5V in that case
10:15 AM pcw_home: they are bounds of the input range (but they are affected by scale)
10:16 AM pcw_home: they are not output bounds (which would be in volts)
10:16 AM fdarling: pcw_home: so the larger the number, the smaller the output voltage for the same input?
10:16 AM pcw_home: Yes
10:17 AM pcw_home: same as most of LinuxCNCs scaling (scale everything to machine units)
10:17 AM fdarling: pcw_home: this has probably been an issue for my setup, it sounds like I need to first correctly set the 7i77's analog scaling values...
10:18 AM fdarling: pcw_home: this machine goes 400 IPM so 6.66 IPS by the way, it was the max the original controller supported. I'm not sure what the actual limits of the mechanical components are...
10:20 AM pcw_home: The actual velocity at 10V will be higher (since you need headroom for the control loop to run at 400 IPM)
10:21 AM fdarling: pcw_home: I'll have to consult the notes from the machine tool builders, they say what the 10V speed is. I could measure it, but I think it might be dangerous... this machine is scary at full speed :-S
10:21 AM fdarling: pcw_home: I could probably measure it by disconnecting the timing belt from the servo to the ballscrew and going off how far it "thinks" it's traveling, right?
10:27 AM pcw_home: You can also measure it by setting FF1=1 and tuning the output scaling...
10:28 AM pcw_home: and yes its safer for initial tuning to disconnect the linear motion components...
10:33 AM fdarling: pcw_home: so to begin tuning velocity mode, you said I should have FF1=1 after getting the scaling correct. What about P/I/D? Should P have some initial value?
10:38 AM pcw_home: p can be small initially so you can see the effects of FF1 more clearly
10:39 AM Rab: https://www.cncwiki.org/index.php?title=File:Elmo_SSA_6_100_eBay_next_day_automation_312081768147_Photo_2.jpg
10:39 AM Rab: wow @ parts placement
10:40 AM Rab: Reminds me of very old, very expensive HDD controllers I've seen, back from when you could presumably get away with that kind of thing.
10:43 AM Rab: I had some IBM data processing electronics with all the parts laid out on a grid, on a 4-layer board: #1 all the X routes, #2 diagonal routes one way, #3 diagonal routes the other way, #4 all the Y routes.
11:00 AM sync: could be worse, but yeah it looks like some 80s autorouted board
12:55 PM fdarling: pcw_home: how would you suggest testing a servo motor open loop with an 8i20?
01:08 PM pcw_home: you can just set the current to run open loop (but you do need feedback for commutation)
01:38 PM Jymmm: For those of you in EU, when you buy a "bucket (not can) of paint", how much are you getting in a bucket?
01:40 PM fdarling: pcw_home: do I really need feedback for commutation though? If I run slowly enough, the motor should just follow along like a compass right? (in the case of a permanent magnet motor obviously)
01:40 PM fdarling: pcw_home: for an inductive motor, the higher the frequency the more torque and speed minus slippage, right? Basically I am saying to run it like a VFD, but I am not sure how I would do that with LinuxCNC or HAL...
01:41 PM fdarling: pcw_home: accidental torque reversal is fine for my testing purposes at this point
01:48 PM pcw_mesa: you can run it like a step motor but is tends to be unstable (some of the commutation alignment schemes run the motor in this mode before commutation is established)
01:48 PM fdarling: pcw_mesa: what do you mean by unstable?
01:50 PM fdarling: pcw_mesa: at any given instant under steady state it would be okay, right? it's just under motion it might be rough?
01:50 PM pcw_mesa: it suffers from the same resonance issues a step drive does
01:51 PM fdarling: pcw_mesa: yes I agree with you there, obviously under load to regulate speed you need feedback with an inductive motor, and with a permanent magnet motor you absolutely need feedback if you're trying to prevent torque reversal from lagging too far behind, and there is the issue of resonance like you're saying where you can actually end up too far ahead (and then behind)
01:51 PM pcw_mesa: so for example as a spindle with an interrupted load it might
01:51 PM pcw_mesa: lose sync
01:52 PM fdarling: pcw_mesa: again I would be doing this just for testing if a motor is dead or not, not for anything long term
01:52 PM pcw_mesa: yeah OK for that
01:52 PM fdarling: pcw_mesa: how do I set it up in LinuxCNC though?
01:53 PM pcw_mesa: set a fixed 8I20 current, and use a incrementing count for the 8i20 angle
01:53 PM pink_vampire: hi
01:54 PM rmu: Jymmm: i bought paint in buckets of sizes of 2,5kg, 5kg, 10kg, 15kg, 20kg and even 50kg.
01:55 PM pink_vampire: 50kg of paint O_o
01:56 PM -!- #linuxcnc mode set to +v by ChanServ
01:59 PM Jymmm: rmu: With 20kg being the most common for a professional painter?
02:00 PM rmu: Jymmm: jeah i suppose about 20kg or 25kg
02:00 PM Jymmm: pink_vampire: pink bricks
02:00 PM pink_vampire: even better
02:00 PM Jymmm: pink_vampire: pink and black?
02:01 PM pink_vampire: sounds good
02:01 PM Jymmm: rmu: Ok, in the US 5 gallons is the most common bucket, even empty
02:01 PM Jymmm: pink_vampire: So now you know what you need to paint your nails next =)
02:02 PM pink_vampire: they very short right now
02:02 PM Jymmm: pink_vampire: WHAAAAAAAT?!?!?!?!?! After all the shit you gave me to teasing to cut them?!!?!?!?!?!
02:03 PM pink_vampire: yeah to the bare skin
02:04 PM Jymmm: pink_vampire: but but but WHY?
02:04 PM ve7it: Jymmm, 20L pails here in Canuckastan (same 5Gal pails, different lable)
02:05 PM pink_vampire: LOL!! I'm joking, they 3/16" - 1/4"
02:07 PM rmu: "imperial" nails
02:08 PM pink_vampire: Jymmm: at least you make me start the day wit a big smile and laughing
02:11 PM pink_vampire: rmu: LOL!!!!
02:41 PM pink_vampire: any advantage to the "Haimer" over probing???
02:48 PM Jymmm: ve7it: Ah, thank you, that's what I was looking for =)
02:48 PM ve7it: good afternoon sir
02:49 PM Jymmm: ve7it: How are you doing?
02:49 PM Jymmm: pink_vampire: I'n glad I was able to do that =)
02:49 PM ve7it: great... finally getting some warmer wx here... now i need to cut the grass!
02:49 PM Jymmm: ve7it: Do you have any HF gear setup?
02:50 PM ve7it: several rigs, but my hf antenna died... I have 6m, 2m, 440 alive
02:51 PM alex_joni: evening
02:51 PM Jymmm: ve7it: oh noes... I have to see if I even have 6m available, sad but true
02:51 PM Jymmm: hey alex_joni
02:52 PM ve7it: hi alex_joni, pink_vampire busy place in here today!
02:52 PM Jymmm: ve7it: I bought a used hf rig long again, and it's never been on the air yet
02:54 PM alex_joni: busy and as off-topic as always :))
02:55 PM ve7it: Jymmm, yea... its hard to keep 275'(80m) of wire in the air... especially when the trees die holding it up
03:17 PM pink_vampire: Hi everyone
03:21 PM Rab: How come the paint is sold in kg instead of liters?
03:22 PM pink_vampire: smaller volume, and you think you are getting more
03:23 PM Rab: It seems like the weight would vary depending on composition, though.
03:24 PM pink_vampire: correct
03:25 PM ve7it: could be easier to meter the fill process by weight... no flow meter to clean
03:25 PM pink_vampire: but very easy to measure in large quantity
03:25 PM pink_vampire: i have load cell here..
03:26 PM pink_vampire: it was damaged and i was able to fixed it
03:31 PM pcw_mesa: fdarling: any RS-422 interface will work with Fanuc serial encoders (7I44,7I74,7i85 etc)
03:37 PM asdfasd1: anyone experienced in electroplating?
03:38 PM pink_vampire: yes
03:38 PM pink_vampire: i did anodizing
03:38 PM pink_vampire: asdfasd1: ^
03:39 PM asdfasd1: anodising is not plating :)
03:39 PM asdfasd1: the problem I have seems to be only on plating
03:40 PM pink_vampire: but it is similar in some way
03:40 PM pink_vampire: what is the problem?
03:40 PM asdfasd1: the problem is when plating on sharp object, the sharp tip burn very easy
03:41 PM asdfasd1: I did try reducing the current but still need improvements
03:41 PM pink_vampire: maybe you need to lower the current?
03:42 PM asdfasd1: I did lower it to the level where just begin the process very slowly
03:42 PM pink_vampire: if you are using acid maybe it is very strong
03:42 PM asdfasd1: but still the tip is more fragile
03:42 PM asdfasd1: it is alkaline
03:43 PM asdfasd1: nearly neutral
03:43 PM pink_vampire: same idea
03:43 PM rmu: asdfasd1: shield the tip
03:43 PM asdfasd1: PH 8
03:44 PM asdfasd1: you mean with isolator?
03:44 PM rmu: no with some other metal
03:44 PM pink_vampire: https://asterionstc.com/2016/04/burning-plating-bath/
03:45 PM rmu: not completely, just enough to slow process down around the tip
03:45 PM rmu: shield at same potential as the thing you are plating
03:46 PM asdfasd1: I did try temoving some of the anode near the tip
03:46 PM asdfasd1: is it the same?
03:46 PM asdfasd1: removing*
03:46 PM pink_vampire: Better solution agitation, especially near the plated work. Higher temperature. Higher nickel ion concentration.
03:46 PM pink_vampire: try to add air stone
03:47 PM asdfasd1: agitation seems to drive other problems, with high temperature couldnt notice any difference
03:47 PM asdfasd1: air is not recommended for iron plating, it introduce oxigen in the bath
03:47 PM asdfasd1: only mechanical agitation
03:48 PM pink_vampire: or a power head that will move the solution
03:48 PM pink_vampire: something that will make it move
03:49 PM asdfasd1: it is done in small beaker, with magnetic stirr bar
03:49 PM asdfasd1: but somehow when the solution is moving it disturb the plating process
03:49 PM asdfasd1: iron plating seems to be very difficult process
03:50 PM pink_vampire: in a beaker?
03:50 PM asdfasd1: https://5.imimg.com/data5/XN/AD/MY-27173992/500ml-glass-beakers-500x500.jpg
03:50 PM asdfasd1: small scale
03:50 PM asdfasd1: on hot plate with magnetic stirring
03:51 PM pink_vampire: i know what is a beaker, but to plate like that...
03:51 PM asdfasd1: it is small workpiece anyway
03:51 PM asdfasd1: 7mm diameter 45mm long
03:51 PM pink_vampire: stir can suck air
03:52 PM asdfasd1: slow stirr no problem, but somehow it disturb the plating
03:52 PM asdfasd1: rmu: have you done such shielding?
04:04 PM rmu: asdfasd1: not really
04:05 PM rmu: but electric field near the tip will be very large, ergo there will be higher current, more action
04:05 PM asdfasd1: I just realised what you actually told me
04:06 PM asdfasd1: sound promising
04:06 PM asdfasd1: do you think it is better than removing anode around the tip?
04:06 PM asdfasd1: or shielding with non conductive piece?
04:07 PM rmu: can't say. my experience with actual electroplating is limited. the shield should be conductive and have same potential as the piece you are plating IMO
04:08 PM asdfasd1: so Im plating the shield too? isnt it?
04:08 PM rmu: yes
04:08 PM asdfasd1: thanks, Im going to try it
04:49 PM cradek: yay Paul Lawrence is volunteering to help with everything from now on and also be perfect!
04:53 PM gloops: can you elaborate cradek?
04:53 PM cradek: sorry I'm just responding to something on the developers list
04:54 PM cradek: just someone being that way some people sometimes are
04:55 PM gloops: ahh ok
05:00 PM Deejay: gn8
05:03 PM pcw_mesa: Yeah lets insult the people that work without pay on LinuxCNC, seems like a winning strategy...
05:05 PM cradek: heh he's posted exactly 3 times to the list and each time was just bitching
05:05 PM cradek: whatever dude
05:07 PM cradek: (hi pcw)
05:07 PM pcw_mesa: Actually I use gedit all the time, its a bit buggy but not horrible
05:07 PM cradek: friday is my last day at the company I've been at since 1995
05:07 PM pcw_mesa: wow that's a long time
05:08 PM cradek: I'm finally quitting to be a full time micromachinist (aka watchmaker)
05:09 PM mozmck: That sounds neat!
05:09 PM cradek: yeah I'm super duper excited
05:09 PM pcw_mesa: Great! so retiring or running your own business? (or both like me)
05:10 PM cradek: I hope it will feel like some combination of both
05:10 PM cradek: I've been doing both for the past 1.5 years and the watch work looks like it will support me now
05:11 PM cradek: ... and I'm exhausted from doing both
05:11 PM pcw_mesa: Thats neat
05:19 PM jthornton: cradek: congratulations on breaking free
05:20 PM cradek: :-)
06:12 PM Jymmm: cradek: CONGRADULATIONS!!!
06:36 PM skunkworks: cradek: Congradulations~!
06:42 PM jdh: cradek: what have you been doing there since 1995?
06:57 PM _unreal_: ya contrats.... what did I mis?
06:59 PM Jymmm: _unreal_: cradek is pregnant and skunkworks is the mother
07:23 PM andypugh: Same question?
07:23 PM andypugh: My entertainment for this evening: https://a360.co/2TK5Fip
07:46 PM Tom_L: andypugh, cast it in bronze
07:48 PM andypugh: The original is aluminium
07:49 PM andypugh: But:
07:49 PM st is now known as Guest66526
07:50 PM andypugh: The conttol panel with the knobs and switches was originally bronze (or brass) https://photos.app.goo.gl/qPmz9RGZ3iVRCDgj9
07:51 PM sync: get the best of both worlds with al bronze
07:51 PM Tom_L: what's the dial by the spindle?
07:52 PM andypugh: Where?
07:53 PM Tom_L: in the lathe pic top left
07:53 PM andypugh: Far left of the panel is the feed motor speed control.
08:10 PM jdh: that e-stop doesn't look period correct
08:17 PM * norias sighs.
08:17 PM norias: I miss the old school G&L boring mills.
08:18 PM norias: https://www.ebay.com/i/321992384161?chn=ps
08:18 PM norias: like that
08:18 PM pink_vampire: huge
08:19 PM norias: yeah
08:19 PM norias: machines you ride on
08:20 PM norias: all sorts of fun mechanical knobs and switches
08:25 PM norias: oh man
08:25 PM norias: so many shops are fucked in the next two decades
08:26 PM norias: i predict
08:33 PM andypugh: Talking of huge machine tools: http://www.lathes.co.uk/waldrich-planers/index.html
08:34 PM andypugh: They seem to have “photoshopped” in lots of people to illustrate the size of the machines. (it gets sillier stil on the second page)
08:36 PM norias: hahaha
08:36 PM norias: some of those are genius
08:36 PM andypugh: Anyway, time for zzzzzz
09:08 PM R2E4: evening all
09:24 PM Tom_L: hi
09:53 PM roycroft: that looks like terry gilliam photoshopping
11:09 PM Elmo40: I went and bought the rubber motor couplers. I must say, they are WAY more accurate than the coiled springy style I had before!
11:09 PM Elmo40: Now all my Z steps are itentical.
11:10 PM Elmo40: and tool kick-back is not nearly as noticable. I do believe I need larger steppers, but that is a whole other storey ;-)
11:12 PM Elmo40: I did notice that going ~5% deeper on a cut was possible with these couplers over the previous ones. The gantry didn't lose any steps. When I went ~10% deeper, it was all wonky from left to right.
11:19 PM Wolf__: oldham couplers are even better imo
11:34 PM Elmo40: are they available in 5/16" / 8mm shaft size?
11:36 PM Elmo40: https://qurl.org/WnV
11:36 PM Elmo40: like this?
11:36 PM Elmo40: the 3pc couplers?
11:40 PM pink_vampire: Elmo40: this is a spider couplers
11:40 PM Elmo40: no. that is oldham. it is only 2-slot
11:41 PM Elmo40: spider is a 3-slot
11:41 PM pink_vampire: i saw that now
11:41 PM pink_vampire: yeah, my bad
11:42 PM pink_vampire: i have spider on my machine
11:42 PM Wolf__: yeah, but I like the acetal disk zero backlash ones
11:43 PM Wolf__: made by RULAND
11:44 PM Wolf__: https://i.imgur.com/JAQu2yN.png?1
11:44 PM pink_vampire: RULAND is the one i have also
11:45 PM Elmo40: damn they are pricey couplers!!
11:45 PM Wolf__: got mine from mcmaster
11:45 PM Elmo40: i'm on their site
11:45 PM pink_vampire: but you want to drive a very large machine
11:46 PM Elmo40: this is for a different project. smaller. only 8mm shaft
11:46 PM Elmo40: the bridgeport will need something larger ;-)
11:46 PM pink_vampire: you can make oldham very easy
11:46 PM Elmo40: https://www.ruland.com/MOCT19-8-A-OD12-19-AT-MOCT19-5-A.html
11:46 PM Elmo40: $50/coupler???
11:47 PM pink_vampire: that sounds correct
11:47 PM Wolf__: cheaper via mcmaster
11:47 PM Wolf__: I think
11:48 PM Elmo40: my mistake... even MORE expensive!
11:48 PM Elmo40: https://qurl.org/XnV
11:48 PM Wolf__: under Clamping High-Parallel-Misalignment Flexible Shaft Couplings
11:48 PM Elmo40: i'll check mcmaster carr
11:48 PM Wolf__: or setscrew
11:50 PM Elmo40: https://www.mcmaster.com/oldham-couplings
11:50 PM Wolf__: setscrew are $13.08 for up to 4-8mm 3/16”-3/8”
11:50 PM Wolf__: yup
11:51 PM Wolf__: not as terrible as the msrp
11:51 PM Wolf__: and they are Ruland brand
11:51 PM Elmo40: ok, acetal or nylon?
11:52 PM pink_vampire: i have some red spider
11:52 PM Wolf__: depends on torque needed
11:53 PM Wolf__: I’m using 3/4” OD type w/ acetal disk on a 420oz-in machine
11:54 PM Wolf__: and have drove the vice right though a 3/8” end mill breaking in clean off with out missing a beat lol
11:55 PM pink_vampire: https://www.ruland.com/JD21-33-98R.html i think those are the ones i have on my g0704
11:55 PM Elmo40: Wolf__, what did you do that for?
11:55 PM Elmo40: forgot to clear the Z before a rapid?
11:56 PM Wolf__: typo in mdi lol
11:57 PM pink_vampire: https://i.imgur.com/Z0a5grd.png 3/4" 4f