#linuxcnc Logs

May 21 2020

#linuxcnc Calendar

12:16 AM miss0r: goodmorning
03:00 AM Deejay: moin
04:55 AM JT-Cave: morning
04:56 AM XXCoder: hey jt
04:56 AM XXCoder: man blast from past this weelk
04:56 AM XXCoder: lathe guy that left 3 years ago have returned
04:57 AM XXCoder: AND we are running HUGE sheet part we havent ran for 5 years
04:57 AM XXCoder: its so big half of it is outside machine lol
04:57 AM XXCoder: we have special "doors" for those, havent seen those for 5 years too lol
05:14 AM JT-Cave: is business picking up?
05:15 AM XXCoder: boeing is reopened so a little
05:15 AM XXCoder: but still pretty slow
05:15 AM XXCoder: i dont think we will keep 40 hours once that goverment support runs out
06:54 AM miss0r: I just stuck a workpiece in the cnc mill, that I spend 4 hours turning on the manual lathe. Fingers crossed...
07:08 AM Tom_L: morning
07:08 AM miss0r: morning
07:09 AM miss0r: Tom_L: I just put the resevoir into the mill to cut the thread...
07:09 AM miss0r: Running it SLOW! :D
07:32 AM SpeedEvil: :)
08:18 AM likevinyl is now known as Guest674
08:47 AM Centurion-Dan2 is now known as Centurion_Dan
09:01 AM skunkworks: jymmmm: I get https://pastebin.com/Uan1gJKk
09:01 AM skunkworks: seems like one or more of the drives are failing in an odd way
10:24 AM dirty_d: I just had an idea
10:25 AM dirty_d: a custom gcode that specifies the jerk/accel/coast etc points on the following movement
10:26 AM dirty_d: that way a program could preprocess a gcode file and insert those to have jerk or higher order limited motion
10:26 AM dirty_d: and the control doesn't have to do much extra work
12:03 PM veegee: Man I am having way too much fun with this forklift
12:03 PM veegee: like a little kid in a gokart but so much better
12:04 PM veegee: Just driving around the parking lot like an idiot picking up and setting down random crates of lumber that isn't even mine
12:04 PM veegee: only a matter of time until the guy beside me gets annoying that I'm using his material for practice
12:06 PM veegee: Time to modify it to make it remote control and auto throttle up when actuating the hydraulics like the newer models do. Servos in ALL THE THINGS
12:48 PM FinboySlick: skunkworks: Still having a tough time with that mdadm array?
12:55 PM skunkworks: No I think I figured it out. Sound like bbl is enabled by default. I disabled it. empireoffsite@empireoffsite-HP-Compaq-8200-Elite-SFF-PC:~/mdadm$ sudo mdadm --assemble --force --update=force-no-bbl /dev/md0
12:55 PM skunkworks: mdadm: /dev/md0 has been started with 8 drives.
12:56 PM skunkworks: and so far so good.
12:56 PM skunkworks: sound like it was poorly inplimented.
12:59 PM veegee: What steel are forklift forks made of? Standard A36/C1018 structural steel? Or is it something like tempered 4130 chromoly?
01:00 PM dirty_d: definitely not mild steel
01:01 PM dirty_d: probably something like hardened and tempered 4130 or 4140
01:11 PM miss0r: i second that opinion dirty_d
01:55 PM Tom_L: miss0r, never saw the finished product!
01:56 PM miss0r: well.. Give me a sec :)
01:57 PM FinboySlick: veegee: AvE has a video on that where he mentions it (after drilling a hole in one) but I can't remember what he said it was.
01:58 PM FinboySlick: Apparently it's something pretty specific for safety reasons.
02:00 PM miss0r: Tom_L: https://imgur.com/a/LNng7qI
02:01 PM miss0r: I'm boring out the second resevoir as we speak.. Yeah its massive stock, I didn't have any prebored stock that fit the requirements :-/
02:02 PM miss0r: Tomorrow morning I will go vapour blast it with glass, that should clean up nice ;)
02:47 PM skunkworks: The mdadm array is looking good. Nothing in dmesg and using
02:47 PM skunkworks: *using it
02:47 PM skunkworks: it would have swithed to RO by now
02:53 PM dirty_d: Budget AvE fixes miter saw https://youtu.be/IT2RSiT4OqQ?t=550
02:53 PM dirty_d: JB weld would've been stronger than that garbage
02:58 PM FinboySlick: dirty_d: I was going to say AvE is the budget AvE, but thinking on it, I'd say his budget did greatly increase in recent years.
03:40 PM Centurion-Dan2 is now known as Centurion_Dan
04:13 PM Deejay: gn8
04:32 PM Centurion-Dan2 is now known as Centurion_Dan
04:49 PM CaptHindsight: anyone have a source for 2mm pole pitch magnetic tape for encoders?
04:49 PM CaptHindsight: I found a couple with limited stock
04:50 PM CaptHindsight: seems they try to obfuscate what their encoder strips are so that you end up buying them with the read heads and at 500% markup
04:51 PM Tom_L: http://www.electronicaems.com/Magnetic-Tape.php
04:54 PM Tom_L: https://sra-measurement.com/high-accuracy-magnetic-linear-tape
04:55 PM Tom_L: http://www.newall.com/products/?name=MAG%2DTS+Magnetic+Tape+Scale&catid=20&prid=207
04:55 PM Tom_L: one of those might do
05:12 PM CaptHindsight: Tom_L: yes, found those, ordered a sample from SRA but they didn't spec the pole pitch, will find out tomorrow
05:13 PM CaptHindsight: oh sorry it is there "Pole pitch for this tape is 2mm"
05:14 PM CaptHindsight: Mouser and Digikey stock the heads but no mag tape
05:14 PM Tom_L: odd
05:24 PM miss0r: Tom_L: did you see the pictures?
05:26 PM Tom_L: yup
05:26 PM miss0r: I've completed the other resevoir now
05:26 PM miss0r: its quarter past midnight now.. I¨ll call it a night
05:33 PM CaptHindsight: searching on alibaba you get most results as CC strips and readers
05:36 PM acer_ is now known as _unreal_
05:36 PM _unreal_: I forget who was I tlaking to about my brushless spindle motor?
05:37 PM CaptHindsight: I might actually end up using a rotary encoder instead
05:40 PM CaptHindsight: anyone know the format used for the encoder in these? https://www.amazon.com/Digital-Aluminum-Equipped-Industry-Machines/dp/B07S3GKT8T
05:42 PM CaptHindsight: https://www.amazon.com/Remote-Digital-Readout-Bridgeport-Magnetic/dp/B07VD5ZWL6/ref=sr_1_11
05:42 PM CaptHindsight: never looked at it with a scope
05:54 PM andypugh: I suspect that rene_dev_ might have looked at the output.
05:58 PM _unreal_: CaptHindsight, I'm likely wrong but I bet its the same function as your standard harbor freight calipers
05:58 PM _unreal_: as far as the encoder goes
05:58 PM _unreal_: dont know how they function though
05:58 PM Tom_L: CaptHindsight, if you go rotary: http://tom-itx.no-ip.biz:81/~webpage/cnc/new_pulleys/Nemicon%20OME%20Encoder.pdf
05:58 PM Tom_L: i got one on my spindle
05:59 PM Tom_L: open collector output
06:00 PM CaptHindsight: i have about 50 sets of glass scales
06:00 PM CaptHindsight: mostly HEIDENHAIN
06:01 PM CaptHindsight: andypugh: yes, i think pcw mentioned it before as well
06:01 PM CaptHindsight: don't think it's quadrature
06:04 PM CaptHindsight: https://www.caliper2pc.de/produkte/zubehoer/accessories.html
06:07 PM CaptHindsight: BIN6 protocol
06:09 PM CaptHindsight: I wonder how many tested dice is the minimum order
06:10 PM acer_: wow my network is just not doing well
06:10 PM acer_: internet that is
06:10 PM CaptHindsight: they tab bond the read head IC to keep it really low cost
06:10 PM acer_ is now known as _unreal_
06:10 PM pcw_mesa: those have a quite slow update rate (maybe 30 Hz)
06:12 PM pcw_mesa: (not surprising for the application and battery power)
06:13 PM _unreal_: so I'm trying to figure something out
06:13 PM _unreal_: hy01d511b
06:13 PM _unreal_: I have that VFD for my spindle.
06:13 PM _unreal_: I got it from amazon. it said its a 110V version. the book seems to say its a 220?
06:13 PM _unreal_: can it switch or is it a hardware difference?
06:13 PM _unreal_: or auto switching?
06:14 PM _unreal_: oh.... ok found my answer
06:14 PM CaptHindsight: pcw_mesa: yeah the data rate is low but the actual read IC can go faster
06:16 PM CaptHindsight: I'm only measuring over a few mm and will likely end up only needing +-10um res
06:57 PM rene_dev_: CaptHindsight andypugh I have not, but other people have.
07:10 PM Choscura: Oh my god you guys seriously
07:10 PM Choscura: this 1/4" router bit, tungten carbide, I've never been so happy to spend 20 on a bit
07:11 PM Choscura: have it in a freehand die grinder now that will eventually be cnc'd up, wish I could advise on feed rates but it fuckin CHEWS
07:12 PM andypugh: So, reading between the lines, you are quite happy with yout cutter?
07:18 PM Tom_L: makes me wonder what he'd been cutting with
07:21 PM Tom_L: andypugh, did you finish your tap?
07:21 PM andypugh: Not yet. I have been making special tools to hold it for final sharpening.
07:22 PM Tom_L: gonna grind the flutes in it?
07:22 PM andypugh: Flutes were machined before hardening, and then I ground them.
07:23 PM Tom_L: did heat treat change it much?
07:23 PM andypugh: I haven’t tested it.
08:18 PM perry_j1987: hows it going guys
08:58 PM veegee: almost done designing my R/C control system for my forklift. Using a Taranis X9 24 channel transmitter I had lying around
08:59 PM veegee: As a bonus, you get auto throttle up when actuating the hydraulics with a bit of simple microcontroller logic
09:00 PM veegee: And now a very smooth fully electronic throttle
09:06 PM veegee: I should probably make a custom transmitter. Overriding the trim switches for the hydraulics is awkward
09:09 PM CaptHindsight: RC controlled forklift?
09:09 PM CaptHindsight: aka killing machine
09:19 PM veegee: CaptHindsight indeed.
09:19 PM veegee: It's less dangerous than my RC helicopters. Those will kill anyone they crash into
09:24 PM SpeedEvil: That's not quite true.
09:24 PM SpeedEvil: Loss of a leg or an arm may not be fatal.
09:29 PM veegee: This thing isn't exactly a one point twenty one jigawatts RC car if you know what I mean
09:30 PM veegee: it moves like 5 km/h and designed to be moved when I'm high up on the forks, so I have even better visibility
09:57 PM _unreal_: trying to figure out what kind of a resistor could be used and or if its even needed ? hy01d511b
09:58 PM _unreal_: a breaking resistor
09:59 PM Tom_L: stove element
10:00 PM Tom_L: https://www.practicalmachinist.com/vb/transformers-phase-converters-and-vfd/vfd-brake-resistor-stove-heating-elements-ohms-280865/
10:01 PM Tom_L: or water heater element
10:41 PM Thorhian: Well, I have to go to bed soon, but I got my linear rails today :) Seem to be decent HGH20CA/HGR20 clones, decent packaging.
10:42 PM Thorhian: I got more cheap bt30 er32 tool holders as well :D
10:59 PM skunkworks: https://www.youtube.com/watch?v=7o_V_1AIaXE
10:59 PM skunkworks: comments are entertaining..
11:06 PM Choscura: Tom_L, had recently found that sidecutting router bit, thought that was the shit
11:06 PM Choscura: have a pocket I'm machining out, had been using a fucking dremel
11:13 PM SpeedEvil: Do be careful that aggressive cutting also means cutting with lots of grip and force if it gets away from you and heads for your eye
11:13 PM SpeedEvil: https://www.youtube.com/watch?v=IIQu1e8DGUw
11:16 PM jymmmm: CaptHindsight: Rc controlled forklift with drone remote sensing and navigation!!!
11:20 PM CaptHindsight: jymmmm: how has power been so far this spring? Did it get better during the lockdown?
11:24 PM jymmmm: CaptHindsight: It's JUST the beginning of fire season, so no (intentional) blackouts yet. there was like one 8+ hours outage a few months ago, but I believe it was due to a car hitting a pole. Just fired up the generator for that. Now, just trying to work on a battery/inverter setup for when the generator is off at night that weights less than 15 lbs.
11:24 PM jymmmm: ...and lasts about 8 hours
11:24 PM CaptHindsight: yes, saw the LiPo battery link
11:25 PM CaptHindsight: 60gigawatt hours for 37 cents, nice find! ^5
11:26 PM CaptHindsight: i made two new goinout virusin masks
11:26 PM jymmmm: Yeah, that battery, selected a BMS to use already. Still working out the mains charging, Vehicle charging, and maybe making it solar capable in the future
11:26 PM CaptHindsight: one is a santa beard glued to a dust mask
11:26 PM jymmmm: lol
11:27 PM jymmmm: CaptHindsight: oh you gotta show us you wearing it =)
11:27 PM CaptHindsight: the other is a white pillowcase with holes cut out to see through
11:27 PM CaptHindsight: low budget and fun
11:28 PM jymmmm: CaptHindsight: That's already been done, and was NOT accepted too kindly
11:28 PM CaptHindsight: it's not pointy
11:28 PM jymmmm: CaptHindsight: This one is... https://www.cnn.com/2020/05/05/us/man-wore-kkk-hood-grocery-trnd/index.html
11:29 PM CaptHindsight: yeah too racist
11:32 PM CaptHindsight: I'd wear the fresh air mask with the flap taped shut but people find that to be too scary
11:32 PM CaptHindsight: did you see the fish bowl helmet>
11:32 PM CaptHindsight: ?
11:32 PM jymmmm: nuh uh
11:33 PM CaptHindsight: it looked like a 1950's space movie helmet
11:34 PM CaptHindsight: https://www.dezeen.com/2020/05/06/plastique-fantastique-isphere-face-shield-design-coronavirus/
11:58 PM jymmmm: CaptHindsight: need the snorkel version =)