#linuxcnc Logs

Oct 03 2020

#linuxcnc Calendar

01:51 AM Deejay: moin
05:23 AM JT-Cave: morning
07:07 AM jymmmm: morning
07:37 AM Tom_L: morning
07:41 AM jymmmm: Tom_L: Neighbor had one, very cool, so ordered one for myself... https://www.amazon.com/gp/product/B08HZCFCN2
11:23 AM _unreal_: making pilot holes for my major mount plate
11:33 AM _unreal_: ARG... drilling the holes with my cnc in STEEL hoping it does not fuck a bit
11:34 AM _unreal_: 1/64 plunge steps with a MICRO bit at 20mm/m feed
11:34 AM _unreal_: crawling
11:34 AM _unreal_: using I believe a 1/32 bit
11:40 AM _unreal_: anyone doing anything today
11:40 AM _unreal_: raining endlessly off and on today
12:20 PM _unreal_: no one around?
12:45 PM CaptHindsight: miss0r2: the LC was running rough at 330K, swapped new 6 injectors, 2 read OPEN, and 1 was pretty clogged
01:00 PM CaptHindsight: has anyone compared the Rpi4 with 2GB vs 4GB or 8GB with LCNC? Is the backplot the only issue with having a lower amount of RAM?
01:09 PM JT-Shop: well just tested my copy of cradek probe to find the center of a hole and it works! SCARY rapids but works great
01:44 PM pcw_home: I just know the RPI3 (1G) would choke in a swapping fit if you manipulated dense backplots
01:47 PM CaptHindsight: pcw_home: we should work on updating the wiki pages on lowering latency and make it very clear what numbers are good
01:48 PM CaptHindsight: i notice that people think that EPP is required for software stepping vs just for use with the LPT FPGA
01:50 PM CaptHindsight: I haven't checked but people also seem to be asking about lowering servo thread scores when they are using a 1KHz servo thread and their latency is already well under 100K
01:51 PM CaptHindsight: https://forum.linuxcnc.org/18-computer/39370-script-for-automated-testing-of-computer-latency doesn't factor in BIOS settings
01:53 PM CaptHindsight: the Russian Orange Pi devs are out of time and funding to fix the RISC driver issue with missing steps
02:12 PM pcw_home: That looked very promising, what was the actual issue?
02:13 PM skunkworks: JT-Shop: have used his probing routines for a long time... works very well
02:14 PM pcw_home: EPP is sometimes needed (Gecko G540 needs EPP because they use pin 16 as output with drive and its a open drain output in LPT mode)
02:17 PM JT-Shop: yea just copied more or less to my PyQtVCP GUI and use a button to run
02:24 PM CaptHindsight: pcw_home: https://forum.linuxcnc.org/18-computer/39037-linuxcnc-orange-pi?start=40#178058
02:25 PM CaptHindsight: pcw_home: thanks, I'll make a note when I update the latency pages
02:26 PM CaptHindsight: pcw_home: the OrangePi issue is likely fixable, they just don't have the time and budget
02:47 PM _unreal_: ok Z is getting closer now on the big machine
02:48 PM _unreal_: just did an epoxy GAP filler for the z rail mounts. HATE doing that but I cant seem to sand out the gaps and its warping the cars on the rails. so I'm just filling the micro gap...
02:50 PM _unreal_: feels good to have the Z started now
02:50 PM _unreal_: so the Z HARD STOPS are done now the major z mount plate has been started
02:51 PM _unreal_: not major. primary
02:51 PM _unreal_: the primary mount plate I need to figure out how I'm going to mouse it to the vertical adapter I have
02:51 PM _unreal_: saddly its got angles in it which piss me off
02:51 PM _unreal_: last thing I need
02:51 PM _unreal_: sigh
02:52 PM _unreal_: its like a 3 degree at most
02:52 PM _unreal_: enough to be annoying
04:02 PM robotustra: https://imgur.com/a/urB6Kog
04:03 PM Tom_L: does it mesh well?
04:08 PM robotustra: pretty well, but I need to decrease the OD by 0.25 mm and make bigger ID to 15 mm
04:08 PM robotustra: it took me about 4 hours to cut it
04:08 PM robotustra: with setup may be 6+h
04:11 PM robotustra: I would say it's not bad at all for the first gear
04:12 PM robotustra: rotary table works ok
04:13 PM robotustra: possibly I'll not touch OD
04:14 PM robotustra: will try to put it as is
06:38 PM veegee: HELP I'm addicted to buying air tools that I already have
06:38 PM veegee: that is, have the electric version of
06:40 PM XXCoder: poor air tools, being insulted with electric versions of
06:41 PM veegee: There's something about them. This angle grinder is nothing special, but I love it more than any of my corded/cordless electric ones: https://www.ingersollrand.com/en-ca/power-tools/products/grinders/angle-max-series.html
06:41 PM veegee: It's so compact, lightweight, and somehow very low vibration
06:41 PM XXCoder: better grip on axis and bearings?
06:42 PM veegee: Possibly, although I don't buy cheap tools anyway. The electric angle grinders I have are also good. It's just this one /feels/ nice is the best way I can put it
06:42 PM veegee: Same with air ratchets, air recip saws, air impacts (obviously)
06:43 PM veegee: With reciprocating saws, sinusoidal motion of the saw blade created by a spinning electric motor has a very different feel from a linear piston driven by compressed air directly
06:44 PM XXCoder: makes sense
06:44 PM veegee: the waveform itself is different and I like it better on the air reciprocating saw. The acceleration is naturally sharper when the blade changes direction instead of being perfectly sinusoidal
06:45 PM veegee: And "impacting" air ratchets are just the best thing ever. Electric ones don't exist and the normal ones that do have a heavy battery on the end and are quite weak
06:46 PM veegee: And the bone shaking power of a high quality air hammer - you feel like it's about to shatter your bones
06:46 PM veegee: Can't be good for your blood vessels but oh well
06:48 PM veegee: I'm about to put up a 2" galvanized steel hard air line. Schedule 10 pipe, apparently half the cost of schedule 40, but can't thread it. It needs mechanical connections
07:47 PM _unreal_: ve7it, no kid this weekend/week so working on the conroller
07:50 PM _unreal_: ve7it, as I recall you mentioned using 1k pull ups on the encoders? Or something like that. also wondering if it would be wise to use something like 22pf caps on them as well to ground to help cut down on any noise?
07:50 PM _unreal_: I dont know what is causing the motor controllers to not hold position.
08:59 PM unterhaus_: I wish I had a compressor big enough to drive air tools.
09:01 PM XXCoder: vee maybe good for bones toughening heh
09:31 PM unterhaus_: skunkworks, you could have been on hackaday with your emco, but I guess yours isn't quite as photogenic
09:40 PM JavaBean: skunks aren't very photogenic to begin with, pretty sure the whole of that species stinks at it.
09:40 PM ve7it: _unreal_, the encoder inputs already have rc filters on the inputs.. just add your pullups http://ve7it.cowlug.org/dspic-servo-schematic.png
09:48 PM ve7it: _unreal_, get serial line hooked up.... if it hasnt been configured it wont enable the servo loop... fast flash (1/2sec on,1/2sec off) of status led indicates it waiting for setup
09:50 PM ve7it: _unreal_, slow flash (2.5sec on, 2.5sec off) indicates drive has faulted (posn error > allowed) and this can be caused by encoder being backwards
09:53 PM ve7it: _unreal_, both conditions inhibit servo loop and set motor drive to 0. read the code in main.c... it has most of the serial strings and explains what the serial messages mean.
09:54 PM ve7it: _unreal_, like line 300 printf("drive fault... maxerror exceeded %f\r\n",(double)pid.error);
11:02 PM _unreal_: ve7it, tomorrow I'm going to RIG up one of the motors with a short custom cable so I can do testing with out any chance of noise or anything
11:43 PM veegee: Wow I just downed 1L of smoothie that was sitting in the fridge for over a week
11:43 PM veegee: So it has almost certainly gone bad since it was made with fresh fruit
11:44 PM veegee: Couln't taste it because of sleep medication which makes your whole mouth taste like metal
11:44 PM veegee: The only thing one can do now is take a double dose of pepto bismol and hope the bismuth coats the intestines and interferes with bacterial processes
11:45 PM XXCoder: lol you should be fine i think. maybe some gut fun for a bit
11:45 PM veegee: Odd that no one still truly knows how pepto bismol works
11:45 PM veegee: Yeah will be standard food poisoning
11:45 PM veegee: so bad stomach cramps, waking up at 1am with diarrhoea that lasts until 8 am
11:45 PM veegee: ruins your whole night
11:46 PM veegee: So reallllly hoping the pepto bismol does its trick
11:46 PM veegee: Fuck it, triple dose it is
11:46 PM veegee: Bismuth, such a beautiful metal
11:47 PM XXCoder: it does crystalizes nicely
11:47 PM veegee: These sleep medications are serious business. They knock you out, make your mouth taste like metal, causes amnesia
11:47 PM veegee: Like Bill Cosby _wishes_ he had those for his victims
11:47 PM veegee: whatever he drugged them with is weak sauce compared to this
11:48 PM veegee: Now banned in canada because too many old people were falling over and getting knocked out. But since I'm an existing user, docker managed to keep my prescription going because it's the only thing potent enough that works
11:49 PM veegee: Alright, see y'all tomorrow. If I die, ya'll can have my toys
11:52 PM XXCoder: later