#linuxcnc Logs

Nov 25 2020

#linuxcnc Calendar

01:07 AM -!- #linuxcnc mode set to +v by ChanServ
01:13 AM -!- #linuxcnc mode set to +v by ChanServ
02:36 AM Deejay: moin
05:03 AM JT-Cave: morning
05:54 AM Tom_L: morning
06:11 AM JT-Cave: spent all day yesterday at the plastic injection plant working on the tank exploder and writing some cludgy code to smooth out the pressure change only to have an epiphany when I got home for a much better algorithm to use the ms timer which has a maximum preset of 9999
06:11 AM XXCoder: tank exploder
06:12 AM XXCoder: yeah sometimes ideas come after finished lol
06:12 AM JT-Cave: and we blew up one tank by accident...
06:14 AM JT-Cave: I used the ms timer with a preset of 1000 and the done bit connected to a counter then used the counter value in a math function as a whole pound adder so the fraction from the ms timer and the whole pound from the counter
07:19 AM JT-Cave: well crap I have to be glued to my phone today
07:20 AM Tom_L: fun
07:21 AM JT-Cave: it will be fun when the truck gets here
07:26 AM JT-Cave: https://www.youtube.com/watch?v=1rSJwMQ5O0U
07:27 AM JT-Cave: this one is using the pigpio library and a low frequency
07:28 AM JT-Cave: the flicker must be the camera
09:38 AM gregcnc: saw a mitutoyo height gauge on ebay that happened to be a semi local liquidation place, looked new in pics
09:40 AM gregcnc: the rack that the handle runs against was damaged. They had the original box, but obvious shipping damage
09:40 AM gregcnc: then he brought another, obviously dropped on the top end
09:42 AM gregcnc: people don't get what precision measuring instruments are, and asking 20% off retail
09:42 AM gregcnc: but also confirmed my suspicions that many of these die in shipping, and these were only 12"
10:50 AM JT-Cave: pretty expensive paper weight
01:01 PM unterhaus_: I would get a height gauge that had been damaged for 10 percent of new
01:02 PM unterhaus_: dropped on the top probably means someone barely picked it up by the base or something, not necessarily shipping
01:02 PM unterhaus_: I have a gauge that goes on a height gauge, so the measuring capability really isn't needed
01:03 PM unterhaus_: compares the heights of things
01:07 PM satiowadahc: I always forget to sign in before sending messages...
01:08 PM satiowadahc: Completed a ridiculous mission of Integrating CI testing on a live mill, for our custom UI :]
02:49 PM roycroft: hello, folks
02:50 PM roycroft: the power supply that will drive my stepper motors is external to my controller case, but will be in the same rack
02:51 PM roycroft: would you recommend my running a ground wire from the power supply to the controller case, and tying the grounds together there, or just use the rack itself as the common ground
02:51 PM roycroft: and would there be any reason to shield the dc power cable to the controller?
02:53 PM * roycroft is thinking that no ground is necessary, and no shielding
02:54 PM roycroft: this is the power INLET to the gecko drives
02:54 PM roycroft: the cables from the geckos to the motors will be shielded
05:00 PM roycroft: anyway, i don't need the waterproof feature of that connector
05:00 PM roycroft: but it looks like a good connector
05:00 PM roycroft: and not a bad price
05:01 PM roycroft: and i just finished work until monday
05:01 PM Eric__: try it out and tell us
05:01 PM Eric__: did you ever get any speakons?
05:02 PM roycroft: no, but i'm planning on getting those for the cables going to the stepper motors
05:04 PM Eric__: is there tech data for the cnlinko ones?
05:05 PM Eric__: they don't say if the current is dc or ac, which means it's ac
05:07 PM Eric__: how much current do you need?
05:07 PM roycroft: the website description says ac/dc
05:08 PM roycroft: 40vdc@10a
05:08 PM roycroft: er
05:08 PM roycroft: 48vdc@10a
05:08 PM roycroft: and the power supply really puts out about 53 volts
05:09 PM roycroft: i did some research on ac vs. dc ratings, and the main issue is arcing while being connected/disconnected hot
05:09 PM roycroft: and that is the primary reason most connectors are derated for dc, or not at all suitable for dc
05:10 PM roycroft: i shall never connect/disconnect while hot, so that should not ever be an issue
05:10 PM roycroft: that said, i prefer to get connectors that are rated for my usage
05:12 PM Eric__: I'm sure it will be fine
05:14 PM roycroft: paypal are insane
05:15 PM roycroft: they are simultaneously urging me to enable two-factor authentication to access my account and have enabled automatic login from my desktop machine without asking me, to make it "easier" to access my account
05:15 PM gregcnc: how do you enable auto login?
05:15 PM roycroft: can two actions be more opposite?
05:15 PM roycroft: *i* don't
05:15 PM roycroft: paypal did
05:15 PM roycroft: i assume they set a cookie to do it
05:15 PM roycroft: i had no choice
05:15 PM roycroft: they just did it
05:16 PM gregcnc: maybe my setting are too tight
05:16 PM roycroft: the sent me an email saying the did it
05:16 PM gregcnc: I wish it would
05:16 PM roycroft: i don't want it
05:16 PM roycroft: i'm the only one who has access to my desktop machine, but i also have multiple paypal accounts
05:16 PM gregcnc: convenient if you print shipping labels
05:16 PM roycroft: and i do not want to be automatically logged into this one when i intend to use a different one
05:17 PM roycroft: i don't mind that they have an auto-login feature
05:17 PM roycroft: some, perhaps most, of their users might like it and appreciate it
05:17 PM roycroft: but they should *never* enable the feature automatically
05:17 PM roycroft: they should offer
05:17 PM roycroft: and default to no if the offer is declined or ignored
05:18 PM Eric__: paypal keeps asking me to auto login and I say no
05:19 PM gregcnc: hmm i've never seen it
05:19 PM roycroft: they don't ask me
05:19 PM roycroft: they inform me
05:19 PM Eric__: you probably breeze right past it
05:19 PM roycroft: they also demand a cell phone number when i log in
05:19 PM roycroft: and i do not have a personal cell phone
05:20 PM roycroft: they used to ask me to add one
05:20 PM roycroft: now they demand it and refuse to let me proceed if i don't
05:20 PM gregcnc: so 1990's of you
05:20 PM roycroft: i found, though, that i can click on the support button at the bottom of the screen when that happens and i am taken to a support page
05:20 PM roycroft: from where i can go to my account overview
05:20 PM roycroft: i had a cell phone in the '90s
05:21 PM roycroft: i had one in the late '80s
05:21 PM roycroft: i was an early adopter of cell phones
05:21 PM roycroft: maybe that's why i got burned out on them before everyone else
05:21 PM gregcnc: the wife had PP ask her tax id so she could sell on ebay
05:21 PM roycroft: they're actually useful for emergencies
05:21 PM roycroft: i carry my work one all the time
05:21 PM roycroft: but i only use it for work and emergencies
05:22 PM CaptHindsight: PayPal, of course! And I registered MoneyMattress and got nowhere :(
05:22 PM gregcnc: capt ever heard of rockford liquidation warehouse?
05:23 PM CaptHindsight: gregcnc: nope
05:23 PM gregcnc: https://www.facebook.com/Rockfordliquidationwarehouse/
05:24 PM roycroft: well i ordered that cnlinko connector
05:24 PM roycroft: hopefully it will work out
05:24 PM roycroft: i'm ready to work on the controller - i already made a ne wrear panel for it, and now it's time to get the connectors and install them
05:25 PM CaptHindsight: gregcnc: near the airport, rarely over there
05:27 PM gregcnc: that's who had the mitutoyo height gages
05:28 PM gregcnc: hah it sold on Ebay, somebody will be pissed
05:28 PM gregcnc: https://www.ebay.com/usr/rlw6638
05:31 PM Eric__: anyone regularly use Wine?
05:32 PM CaptHindsight: gregcnc: figures, I bet PP is cracking down on reporting income
05:32 PM CaptHindsight: going after the small potatoes
05:35 PM gregcnc: Yeah. The threshold is quite high both 20kUSD and 200 transactions in most states
05:35 PM gregcnc: they had a new Dake press over there. it was nice compared to my little chinaco press
05:42 PM Tom_L: reasons you would want an arbor press over a floor press?
05:43 PM gregcnc: no. but space is tight right now. I regret not buying a couple small hydraulic presses i saw on ebay a long time ago
05:43 PM Tom_L: i really don't have room for either but if you had to pick?
05:44 PM Tom_L: the cheap arbor presses have a pretty short travel
05:45 PM gregcnc: https://www.dakecorp.com/products/arbor-presses/ratchet-lever-arbor-press-1-1-2b
05:46 PM XXCoder: if you has a lathe that can work with 1" or even better 2" diameter rods, you could make really strong press pretty simply
05:47 PM gregcnc: hydraulic would be faster for production
05:48 PM gregcnc: there was a nice bench size on CL recently, but the hydraulic unit was 12V
05:48 PM Tom_L: what did they want for that 3ton model?
05:48 PM gregcnc: 875
05:49 PM gregcnc: but I think they buy freight damage goods. i've have to look over the casting really well
05:49 PM Tom_L: meh, i think due to space constraints i'll keep borrowing my friends
05:50 PM Tom_L: i seldom need one anyway
05:51 PM Tom_L: i had to broach these pulleys is what brought it up for me
05:53 PM gregcnc: yeah. I did a few small keyways on the lathe
05:53 PM Tom_L: if i never thought i'd need a 5mm broach again i'd ebay this one
05:53 PM Tom_L: but i'll keep it just in case :)
05:53 PM Tom_L: my little lathe wouldn't take it
05:54 PM Tom_L: and i was worried it was pushing the mill too hard
05:54 PM Tom_L: for my unconventional broach approach
05:54 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/rotary/Broach/Broach_holder3.jpg
05:55 PM gregcnc: did you use that in X?
05:55 PM Tom_L: for the tests i did yes
05:56 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/rotary/Broach/broaching2.jpg
05:56 PM Tom_L: i wasn't all that happy with the results
05:56 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/rotary/Broach/Broach1.jpg
05:56 PM Tom_L: worked like a champ
05:57 PM gregcnc: right, same on the lathe, a little hard to do in steel
06:02 PM gregcnc: while I'm waiting to find a height gauge I bought a setup like this locally. Should cover most of my needs. https://www.ebay.com/itm/184412275240
06:03 PM gregcnc: i guess the base is almost twice the size of that one
06:03 PM Tom_L: huh what are those used for?
06:04 PM gregcnc: measuring height
06:04 PM Tom_L: lab ?
06:04 PM Tom_L: well yeah
06:04 PM Tom_L: i've not seen one quite like that
06:04 PM enleth: Loetmichel: that broaching tool doesn't have top and side reliefs, that could have contributed to the difficulty and poor results
06:08 PM gregcnc: enleth tom's broach?
06:08 PM Tom_L: i think that's what he meant
06:09 PM gregcnc: I was going to say as much, but for aluminum, meh
06:09 PM gregcnc: mitutoyo 215-407
06:09 PM Tom_L: kinda how i felt about it
06:09 PM gregcnc: oops. I meant i used carbide tip when i did 4mm in steel
06:09 PM enleth: ah, right, fail
06:10 PM enleth: Tom_L: yep, that was for you
06:11 PM enleth: this is the broaching tool I've been using, some second-hand new old stock: https://f.allegroimg.com/original/01c84d/9e71dafe4d8097002dd5fc02086f/Noz-do-dlutowania-dlutownicy-8mm-6mm-5mm-dl-200mm
06:11 PM Tom_L: i thought about something like that too
06:11 PM enleth: very substantial reliefs on all sides, it's shaped almost like a hook
06:12 PM gregcnc: basically what I did
06:12 PM enleth: cuts perfectly
06:12 PM Tom_L: it was just much easier with the right tool as usual :)
06:13 PM gregcnc: through hole is easy. mine was blind
06:13 PM Tom_L: i was a bit concerned about the force on the axis
06:13 PM enleth: I broached an 8x5mm keyway in a steel pulley on a lathe using this tool in a couple minutes, got excellent finish and dimensional accuracy
06:14 PM Tom_L: i'm sure it worked good, i've seen those
06:14 PM enleth: I just hope the bits I got with the set will last, I'm not looking forward to grinding that shape on my own
06:15 PM Tom_L: i got a carbide wheel coming for my bench grinder
06:17 PM JT-Cave: whew what a long day
06:19 PM * Tom_L 2nds that
06:20 PM JT-Cave: a green wheel?
06:20 PM Tom_L: yeah
06:20 PM Tom_L: had a time finding one that fit
06:20 PM Tom_L: most of em are larger
06:23 PM JT-Cave: larger OD?
06:23 PM Tom_L: width
06:23 PM Tom_L: my grinder is 3/4 wide and most of the wheels i found were 1"
06:28 PM JT-Cave: yea most green wheels are 1" or bigger
06:28 PM JT-Cave: https://gnipsel.com/images/equipment/powermatic%20pm2244/
06:28 PM JT-Cave: what are you grinding?
06:29 PM Tom_L: is it christmas already?
06:29 PM JT-Cave: yea
06:29 PM Tom_L: just some lathe tools etc
06:29 PM JT-Cave: brazed tools?
06:29 PM Tom_L: yeah
06:30 PM JT-Cave: time to retire to the couch
06:30 PM XXCoder: yay couch time
06:31 PM Tom_L: i can honestly say i'd be more excited if it were for the metal shop :)
06:31 PM JT-Cave: speaking of retiring the wife is retiring in 4 weeks
06:31 PM JT-Cave: but I have a surface grinder all ready :)
06:31 PM Tom_L: heh
08:04 PM CaptHindsight: https://imgur.com/gallery/jKr2Jxv if only machine assembly was this easy
08:06 PM XXCoder: "This is the kind of job where you come home and have dreams about doing this because it's so repetitive." yep
09:18 PM -!- #linuxcnc mode set to +v by ChanServ