#linuxcnc Logs

Feb 26 2020

#linuxcnc Calendar

01:16 AM _unreal_: ok finished all that other stuff
01:21 AM _unreal_: so I hacked the computer finally
01:21 AM _unreal_: got into windows
01:21 AM _unreal_: works fine, so decent score
01:42 AM veegee: My split beam torque wrench setting dial drifts slowly to lower values with each click
01:43 AM veegee: It's this one: https://www.amazon.ca/Precision-Instruments-PREC2FR100F-Wrench-Dr-Split/dp/B000YOX568
01:43 AM veegee: It's great in every other way but just tightening 20 fasteners caused the dial to slowly decrease by almost 10 ft lbs
01:45 AM veegee: I really want to like it but that's a dealbreaker for me. I asked if this behaviour is normal via the amazon questions thing and some guy said he has several of these and called the manufacturer and confirmed that it's normal behaviour and all his units behave the same way
01:46 AM veegee: I feel like this flaw can be fixed by adding some friction to the adjustment dial, perhaps with a spot of hot glue underneath the flip latch such that it presses down on the thumb wheel when in the closed position
01:46 AM veegee: I don't know how it works internally though, so I'm not sure if that would affect the accuracy or click mechanism in any way
01:58 AM * Loetmichel hat a funny effect on the CNC 6040 just now: spindle on: y axis slowly turning...
01:58 AM Loetmichel: tighten down the ring that holds the spindle plug onto the spindle: gone.
01:59 AM Loetmichel: <- ??? I HATE EMI!
01:59 AM * jym wraps Loetmichel in afaraday cage
02:01 AM sensille: i thought emi pays your job
02:16 AM Loetmichel: sensille: yes
02:16 AM Loetmichel: thats the pooint
02:17 AM Loetmichel: wouldnt i not know that stuff i would have been totally stumped as to why
02:17 AM Loetmichel: especially because the spindle wire IS already packed good with shielding
02:18 AM Loetmichel: http://www.cyrom.org/palbum/main.php?g2_itemId=12560&g2_imageViewsIndex=1
02:20 AM Loetmichel: put another layer of shielding braid on it, added a couple of clip opn ferrites to get it "quiet"... and the moment the ground connection on the spindle is wonky because of a lose plug fixing ring its all for nothing.
02:20 AM Loetmichel: thats how it looked when delivered: http://www.cyrom.org/palbum/main.php?g2_itemId=12506&g2_imageViewsIndex=1
04:16 AM XXCoder: lol https://www.youtube.com/watch?v=FMvppuS_ehg
04:17 AM Deejay: moin
05:00 AM Tom_L: morning
05:21 AM jthornton: morning
05:21 AM XXCoder: heys
05:21 AM selroc: hi guys
05:21 AM XXCoder: jt im feeling more and more that shop will cut work hours soonish
05:22 AM jthornton: orders slowing down?
05:22 AM XXCoder: nah going strong. its just that 737 crash stopped some jobs, enough to do pretty serious underflow
05:31 AM XXCoder: lathes is still going very strongly
05:31 AM XXCoder: theres metal rods everywhere
05:31 AM XXCoder: but mill guys mostly dont run lathes
06:59 AM SpeedEvil: Protip: Now is a great time to contact lots of shops working on the 737 and have them run you off an extra so you can DIY.
07:07 AM Elmo40: Tom_L, GibbsCAM is what a lot of small shops have. Very feature full and on the lower price spectrum.
07:07 AM unterhaus_: I think the Starrett 98-6 may be the most overpriced item on ebay
07:07 AM unterhaus_: majority of sellers want more than retail
07:09 AM Elmo40: $100?
07:09 AM Elmo40: oh, that is Pounds...
07:09 AM Elmo40: yeah. that is a lot
07:09 AM Elmo40: what brings that up? you installing a window? ;-)
07:10 AM Elmo40: their website lists as $140USD
07:11 AM unterhaus_: it's a useful size for rough leveling of machines
07:12 AM unterhaus_: I was actually looking at cylindrical squares, level popped up because I recently bought a 98-4
07:13 AM unterhaus_: someone on fb suggested I have a machine shop make a cylindrical square for me. No
07:15 AM unterhaus_: I wrote a program to evaluate squareness of cylinders, most people don't really consider that something like that could be out of square
07:21 AM SpeedEvil: taper and higher harmonic errors, I guess.
07:59 AM X704 is now known as tiwake
08:05 AM unterhaus_: the people I wrote the software for were only interested in squareness. Usually they wouldn't be interested in the fundamental, but in this case there are two sets of surfaces that have to be square
08:06 AM unterhaus_: when you are messing around with really small angles, trig doesn't really work that well
08:07 AM unterhaus_: every other piece of software I wrote for them removes the once-around/fundamental
08:09 AM unterhaus_: once around is usually just mounting error
09:08 AM sync: I like the cylinder squares that actually are ground off square deliberately so that you can gauge the amount of unsquareness
09:14 AM unterhaus_: not sure I understand the purpose of that, but my metrology expertise mostly involves things that spin
09:15 AM unterhaus_: who makes an out-of-square square?
09:15 AM sync: iirc starrett made one
09:16 AM sync: well, you can gauge something that is not square
09:16 AM sync: it's basically a cylinder where the bottoms is ground at an angle
09:16 AM unterhaus_: starrett probably couldn't make it square
09:17 AM unterhaus_: their usual response to quality problems is, "what do you expect for $100?"
09:19 AM unterhaus_: I expect I will find some other company that takes these sorts of things seriously
09:19 AM Loetmichel: unterhaus_: "useable tools"
09:19 AM sync: yeah my experience with starrett is that all their stuff is junk
09:21 AM unterhaus_: Their stuff is okay, I try to go to alternates when I can
09:21 AM unterhaus_: I know it's a tough market, but taking advantage of their customers is no way to survive
09:22 AM unterhaus_: The Chinese can equal them, if they want to. That should be motivation enough to maintain quality
09:27 AM p0g0_: I'll offer that if the "grounding off" is a cycloid or such, the degree that one rotates the cylinder or measure the gap with leaf gauges (think of how cams are designed) you can get an accurate measure of some kinds of irregularities.
09:33 AM Tom_L: Elmo40, can't say i've ever heard of it
09:36 AM sync: p0g0_: no, it's directly graduated
09:37 AM sync: https://megawavz.com/shop/brown-sharpe-558-cylindrical-square/ p0g0_ unterhaus_
09:38 AM gregcnc: neat
09:40 AM unterhaus_: that's really interesting. I'm still a bit curious why you would want such a thing. Maybe their main customer was Starrett
09:46 AM unterhaus_: I imagine most things like that have been supplanted by inexpensive CMM's
09:48 AM sync: well if you have a squareness tolerance you can directly assess wether you met it or not
11:58 AM unterhaus_: now I have an irrational desire to own that BS558. To go with my curved ruler
11:59 AM unterhaus_: curved ruler https://www.amazon.com/FAIRGATE-Curve-Stick-Inches-11-124/dp/B06Y153V23
04:16 PM Deejay: gn8
04:53 PM _unreal_: ve7it, hello
04:53 PM _unreal_: ve7it, so I ordered a prorammer
04:54 PM _unreal_: I dont know whats with the one I bjust built
04:54 PM _unreal_: but its doing wierd stuff and show's up as a usb device loads drivers but does not " connect"
04:54 PM _unreal_: and if I just touch a pin it "reboots
04:55 PM _unreal_: not sure whats causing that
05:01 PM ve7it: _unreal_, yeh, I saw the board your ordered... that looks like a good deal from microchip
05:02 PM _unreal_: as far as the controllers go its the ONLY thing holding them up from being functional
05:03 PM _unreal_: ve7it, killing me though. these bose amp things I wish I had grabbed a few of them a few months ago and opened them
05:03 PM _unreal_: I never bothered
05:03 PM _unreal_: I just did last night.
05:03 PM _unreal_: 2x 63v 10,000uF caps
05:03 PM ve7it: _unreal_, I was looking at some other versions of the project and I did get it imported to kicad... was considering laying out a new pcb and sending it off to china, but that is weeks of work.. got a cup of coffee and a cookie instead
05:04 PM _unreal_: heh
05:04 PM _unreal_: ;)
05:04 PM ve7it: good sacore on caps..... missed it by "that much"
05:04 PM _unreal_: ve7it, I do wonder if there are any speaker amps that would/could be a drop in
05:04 PM _unreal_: for this project
05:05 PM ve7it: have you got any pix of the bose stuff?
05:05 PM _unreal_: the board? or the enture unit?
05:05 PM ve7it: whatever... interested in what you found in the dumpster
05:05 PM _unreal_: one sec
05:06 PM _unreal_: bose lifestyle sa3
05:07 PM ve7it: speaker amps are not usually dc coupled, but have most of the right parts
05:07 PM _unreal_: https://elektrotanya.com/bose_lifestyle_sa-2_sa-3_amplifier.pdf/download.html
05:08 PM _unreal_: big transformer dont know its specs saddly
05:09 PM _unreal_: single primary, dual secondaries
05:09 PM _unreal_: and the amp is rated at 400watts
05:09 PM _unreal_: with 63v caps I'm guessing it must be 24-34 vac
05:11 PM _unreal_: ve7it, I got a big expensive lead acid battery charger I'm going to check out
05:12 PM _unreal_: says damaged but I've seen them "damaged" before only to find there was ntohing wrong with them just morons dealing with them
05:12 PM _unreal_: marine grade
05:13 PM ve7it: cool
05:13 PM ve7it: nice looking amps
05:18 PM ve7it: https%3A%2F%2Fwww.st.com%2Fresource%2Fen%2Fdatasheet%2Ftda7293.pdf datasheet for amp modules
05:20 PM ve7it: https://www.st.com/resource/en/datasheet/tda7293.pdf maybe that works...
05:24 PM _unreal_: work?
05:26 PM _unreal_: I belive I have 6 of those amp chips now
05:27 PM _unreal_: ve7it, omg THOSE amp chips are WAYYYYYY cheaper then the one's for the servo controller :)
05:28 PM ve7it: nice chips... workable at +-40V and around 6A.. and you have the power supplies as well!
05:29 PM _unreal_: power supply :/
05:29 PM _unreal_: only have one of those BOSE amps I've had them in the past and disgarded them
05:29 PM _unreal_: now I'm regretting
05:29 PM _unreal_: I also got a FREE car amp out of the dumpers has the same chips
05:29 PM _unreal_: 4x
05:30 PM ve7it: wonder why they tossed the bose stuff... pretty high end
05:30 PM _unreal_: luxury yachts
05:30 PM ve7it: I guess a new sound system upgrade
05:30 PM _unreal_: ve7it, you would be in heaven if you saw the stuff I get
05:31 PM ve7it: I probably would not be able to fit in the front door!
05:32 PM _unreal_: You know the power back plane stuff
05:32 PM _unreal_: where its like a rack inside an enclosure
05:32 PM _unreal_: one sec
05:33 PM _unreal_: https://www.nuovaelva.it/docs/Datexel/documentazione/pdf/eng/slim_series/DAT4531D_ENG_0308R04.pdf
05:33 PM _unreal_: I just got a few control boxes that where full of hardware that use that things same rack system
05:33 PM _unreal_: lots of sensor modules like that different functions
05:33 PM _unreal_: lots of very expensive relays
05:33 PM CaptHindsight: https://www.datron.com/products/cnc-milling-machines/c5/ are these ~$100K?
05:33 PM _unreal_: I got 7 $40 dollar relays
05:34 PM ve7it: nice
05:35 PM _unreal_: CaptHindsight, I could see 30k at most
05:35 PM _unreal_: 100k seems a bit much for a small machine
05:35 PM _unreal_: CaptHindsight, I just found that machine for 22k euros
05:36 PM _unreal_: so ya about 30k USD
05:36 PM CaptHindsight: new or used?
05:36 PM _unreal_: new
05:36 PM _unreal_: google
05:36 PM _unreal_: ve7it, ya I have a number of items
05:37 PM _unreal_: hell I got ethernet to RS232 and serial to 422 adapters
05:37 PM _unreal_: like 5 months ago
05:37 PM _unreal_: have not done anything with them yet
05:37 PM _unreal_: I'm more likely to $$ do something with them :)
05:38 PM _unreal_: ve7it, are you looking at updating the servo controller project?
05:38 PM _unreal_: to newer hardware. since some of the parts are opso.
05:41 PM ve7it: not really... just got interested in all the files I found about the project.. there were 5 versions through its lifetime... V5 never worked!
05:41 PM _unreal_: hehe
05:42 PM ve7it: V5 had 2 of the power output stages set up in bridge mode so it could drive 48V motors
05:42 PM _unreal_: would be worth it for you to make a final version with little more curent hardware and get boards build. JUST sell the bare pcb's
05:43 PM ve7it: yea... pcbs and programmed pics!
05:43 PM _unreal_: yaaaaa and the pics
05:43 PM _unreal_: hence my current delema
05:43 PM _unreal_: if you do that, I would suggest looking at that code I linked you to the torroco something or other one. and the auto tunning
05:44 PM ve7it: the pics are still available... just got some samples from microchip... the sample program is alive and well!
05:45 PM _unreal_: I KNOW your going to say its not complicated to tune, but if you do look at selling the boards. if it has an auto tuning feature. it would be LESS service call work.
05:45 PM _unreal_: I dont get it how do I .....
05:45 PM _unreal_: hehe
05:47 PM ve7it: yea... I havent known anybody that found auto tune to work well.... very dependant on loads,backlash,machine stiffness... during tuning it could break things
05:47 PM CaptHindsight: $120k https://www.datron.com/products/cnc-milling-machines/datron-neo/
05:48 PM _unreal_: ve7it, https://www.crowdsupply.com/citrus-cnc/tarocco
05:50 PM _unreal_: that link has the hackaday/github links
05:50 PM _unreal_: ! maybe it was the Odrive I was tinking of
05:51 PM JT-Shop: wow I got more Woodpeckers nuts in the mail
05:52 PM _unreal_: JT-Shop, were they stamped?
05:52 PM _unreal_: ;) or notched
05:53 PM _unreal_: ve7it, I'm also wondering if this clone pickit3 is not th e issue and the quick socket board is the issue?
05:54 PM _unreal_: hum
05:54 PM _unreal_: well ibbiab shower etc...
05:57 PM JT-Shop: stamped I think
05:58 PM JT-Shop: I was missing some from the router table and I got 2 packs of replacements lol
06:34 PM SpeedEvil is now known as Guest34276
06:40 PM unterhaus: explanation why you want a non-square cylindrical square https://www.youtube.com/watch?v=QiMPRyJ76KI
07:38 PM CaptHindsight: unterhaus: couldn't find a more depressing informative video?
08:20 PM _unreal_: ve7it, hello, so my daughter and I just finished tearing appart the battery charger thing
08:20 PM _unreal_: its got a PIC for a controller
08:21 PM _unreal_: pic 16f73msp
08:21 PM _unreal_: PIC16F73-I/SP
08:53 PM X704 is now known as tiwake
10:06 PM ve7it: _unreal_, what voltage is it for? 24v system?
10:22 PM _unreal_: the pic?
11:09 PM Elmo40: you still fighting with that thing?
11:14 PM CaptHindsight: built from scratch
11:31 PM ve7it: _unreal_, the battery charger... just wondering if that has the transformer you needed