#linuxcnc Logs

Jul 31 2020

#linuxcnc Calendar

12:24 AM XXCoder: prtty cool https://youtu.be/2Odj_uWx0Xs
12:35 AM jymmmm: XXCoder: nice
12:35 AM XXCoder: yeah
12:36 AM XXCoder: this is pretty dumb but cool also https://youtu.be/svY44WBSEWU
12:53 AM jymmmm: XXCoder: HAHA, that was funny =)
12:53 AM XXCoder: yeah
12:54 AM jymmmm: I would have tape masked the handle before expoying the blade
12:55 AM jymmmm: Might have looked nice if he twisted brass and copper wire together
04:06 AM XXCoder: sigh myfordboy
04:06 AM XXCoder: "my cutter is still good condition" inserts has chips
04:07 AM XXCoder: its dead, jim. rotate inserts.
04:10 AM XXCoder: https://youtu.be/bGI27DulBvQ?t=172
04:54 AM XXCoder: Loetmichel: old days of no osha safety https://youtu.be/t9rkPif0Oi8 heh
05:17 AM Tom_L: morning
05:17 AM XXCoder: hey tom
05:35 AM JT-Cave: morning
07:17 AM Loetmichel: *SWEAT* Smartphone says 52°C in the workshop. 2 CNC routers and two shopvacs running. No windows, no AC... i cant even drink enough that anything goes thru my kidneys, everything drips right out the pores ;)
07:40 AM JT-Cave: change the C to F and you will be comfortable
07:45 AM * JT-Cave goes to run the saw mill for a while
08:43 AM robotustra: GDP decline 34% in Q2 in USA
08:44 AM robotustra: happy sysadmin day
10:09 AM Loetmichel: soo, took my work outside to the "break bank" (and table)... MUCH better(cooler) than in the hot workshop... neighbors probably hated it though... every few minutes ran the belt grinder with ~91dbA ;). Well, 5pm. Workweek done. HOME, HERE I COME!
10:12 AM robotustra: are you in EU?
10:13 AM robotustra: finally win, finished Y axis DRO and it works
10:13 AM robotustra: next step is X axis
10:31 AM roycroft: i need to do some work outdoors after work today
10:31 AM roycroft: fortunately it's cooler today - the high is "only" going to be 29
10:40 AM skunkworks: http://electronicsam.com/images/greenmachine/IMG_20200730_165824.jpg
10:41 AM jymmmm: skunkworks: https://www.teuniz.net/DSRemote/
10:41 AM skunkworks: jymmmm: yes!
10:42 AM skunkworks: (I don't know if that is what jepler uses - but that is how he was getting screens shots)
10:42 AM jymmmm: skunkworks: I didn't find anything "web", just telnet/nc from commandline
10:44 AM jymmmm: # save a screenshot from the oscilloscope's display to the file 'image.png'
10:44 AM jymmmm: echo ":DISPLAY:DATA? ON,OFF,PNG" | nc -w1 5555 | dd bs=1 skip=11 of=image.png
10:48 AM roycroft: that looks like a perfectly fine way to take a screen shot
10:49 AM Loetmichel: robotustra: german
10:49 AM robotustra: das ist gut
10:50 AM robotustra: at 5 pm all germas drop their tools on a floor as is and gehen nach haus
10:50 AM Loetmichel: roycroft: the point was that i sat 6 hours in the 52°C workshop today. even the 31°C outside in the shadow feels "cool" against that
10:51 AM Loetmichel: robotustra: more like: the hammer is still hovering in the air when you hear the "Thankyou" of the worker clocking out ;)
10:52 AM CaptHindsight: robotustra: found another servo controller with sin/cos encoder inputs https://doc.ingeniamc.com/venus/product-manual/installation-and-configuration/motor-feedback-connections/position-feedback-interfaces/analog-encoder-sin-cos-encoder
10:52 AM CaptHindsight: just as an example
10:53 AM robotustra: I saw it in a USSR when german workers built some building on a plant, and the launch time happend
10:54 AM robotustra: CaptHindsight, but what is the absolute position error for these servos?
10:55 AM Loetmichel: let me guess: the break horn tooted and even before it ended you heard the air fall into the vacuum where the workers were a split second before?
10:56 AM robotustra: something like this
10:56 AM robotustra: because it's not common to leave tools at working place in USSR, especially where a lot of people wandering
10:56 AM Loetmichel: but i bet you something when the work horn tooted again all the workers were back at their place
10:56 AM robotustra: they could not find them after launch
10:57 AM Loetmichel: lunch
10:57 AM robotustra: lunch
10:57 AM Loetmichel: yes, i can imagine.
10:57 AM robotustra: german tools on a soviet plant
10:57 AM robotustra: in the USSR
10:57 AM Loetmichel: i have two russian coworkers... "where is the pliers?" "Ask alex!" Where is the battery drill?" "ask eugen!"
10:57 AM Loetmichel: :-)
10:59 AM robotustra: but I must say that the situation with tools highly improoved after ussr decay
10:59 AM CaptHindsight: Loetmichel: since your shop has shared hand tools, how are they managed?
10:59 AM robotustra: because of chinisium and any external production
11:00 AM Loetmichel: CaptHindsight: they are not. Whoever comes first gets it. and if someone searches for it : ask the russians, chances are good they have them somewhere ;)
11:01 AM robotustra: I had built a rack
11:01 AM Loetmichel: reason why i am sometimes a bit pissed when MY PRIVATE battery drill disappears... ist not like we have three drills for 5 workers.
11:01 AM Loetmichel: so no need to snatch mine.
11:02 AM Loetmichel: s/have/dont have
11:02 AM robotustra: a la Adam Savage
11:02 AM robotustra: and all my kids source tools from that rack
11:03 AM robotustra: if they do not return them after use - no pocket money
11:03 AM * roycroft has like 5 battery drills and no other workers
11:09 AM robotustra: https://i.imgur.com/GR8Kah9.jpg
11:09 AM robotustra: works alredy 2 years, every day
11:53 AM CaptHindsight: ended up using electrolysis on the fuel door hinge
11:57 AM robotustra: God bless Faraday
12:17 PM roycroft: thank goodness it's faraday!
12:18 PM * roycroft thinks we should change the name of the fifth day of the week, because people are too obese these days and "friday" may be offensive to them
12:18 PM roycroft: but who can be offended by faraday?
12:26 PM CaptHindsight: polarizing figure
12:32 PM CaptHindsight: was just looking over Faradays work
12:32 PM CaptHindsight: amazing how he did all this when people were still burning witches
12:34 PM Tom_L: skunkworks, you can loose alot of tools on that bench
12:34 PM Tom_L: lose*
12:42 PM roycroft: well i haven't lost any hard drives so far - that's pretty amazing
12:42 PM roycroft: and the one that was so hot yesterday is now 40 degrees
12:42 PM roycroft: well within normal working limits
12:43 PM Tom_L: give em time
12:43 PM jymmmm: roycroft: HVAC mucking up again?
12:43 PM roycroft: it's still not fixed
12:43 PM roycroft: but there's a portable unit in the room now
12:43 PM roycroft: the temperature is way down - ambient is 22 degrees
12:43 PM roycroft: and there are two big fans blowing directly across the server racks
12:44 PM CaptHindsight: frosty
12:44 PM roycroft: 20 is where i like to keep it
12:44 PM roycroft: but i'll settle for 22 for now
12:44 PM roycroft: the hvac folks will be back at 8am monday
12:44 PM CaptHindsight: I'd keep those fans there to keep MTBF down on those rack components
12:45 PM roycroft: yes, i'm thinking that i'll leave at least of them running even after the hvac system is fixed
12:45 PM roycroft: the second one is kind of in the way, so i'll probably turn that one off
12:45 PM roycroft: but we'll see
12:45 PM CaptHindsight: very noisy?
12:45 PM roycroft: since i can query each of my hard drives to find its temperature it's easy to figure out what to do
12:46 PM roycroft: yes, it's noisy
12:46 PM roycroft: but the whole room is really noisy
12:46 PM CaptHindsight: i sort of get used to them and some day they get on my nerves
12:46 PM roycroft: i hate working in there, but i wear some good hearing protection with built in radio when i'm there
12:46 PM CaptHindsight: i forget how white noisy this place is until the power goes out
12:46 PM roycroft: it's horrible
12:46 PM CaptHindsight: lots of fans
12:47 PM roycroft: but the facility is mostly unstaffed
12:47 PM roycroft: so it's not that big a deal
12:47 PM roycroft: unless i have to go there and forget the radio ear muffs
12:47 PM roycroft: then i get irritated
12:47 PM CaptHindsight: try having a barking dog next door
12:48 PM CaptHindsight: i don't get people that bring their untrained dogs to work
12:48 PM CaptHindsight: and also can't seem to train them
12:48 PM Tom_L: sure they did
12:48 PM Tom_L: just not the way you thought
12:48 PM jymmmm: CaptHindsight: IT's cool to have pets at work, but not if it's a constant interuption to everyone
12:48 PM CaptHindsight: exactly.dog trained them
12:49 PM jymmmm: CaptHindsight: Can't say anything?
12:49 PM CaptHindsight: I'd adopt a large bird, we have 24 ft ceilings
12:50 PM CaptHindsight: jymmmm: they moved out, we offered to help, train, pay for training etc etc
12:50 PM CaptHindsight: they were just crude people
12:50 PM jymmmm: CaptHindsight: ah
12:51 PM CaptHindsight: they moved into a metal shed building shared with a transmission repair
12:51 PM CaptHindsight: he probably hates them now
12:53 PM CaptHindsight: we had the ultrasonic canon up for a while with bark trigger
12:53 PM Tom_L: get a lidar for them
12:53 PM CaptHindsight: 1200W into 4 emitters
12:54 PM CaptHindsight: should offer it to the trans guy
01:04 PM jymmmm: What would be the purpose of a 1 ohm resistor in a circuit? Too low for a pull up
01:04 PM CaptHindsight: measuring current
01:05 PM jymmmm: CaptHindsight: there are a LOT of them on this board,
01:05 PM CaptHindsight: https://www.powerelectronics.com/technologies/power-management/article/21864130/using-resistors-for-current-sensing-its-more-than-just-i-vr
01:06 PM CaptHindsight: also to balance parallel things like diodes or mosfets
01:07 PM Tom_L: jymmmm, what color are they???
01:07 PM CaptHindsight: https://www.ti.com/lit/an/slva250/slva250.pdf?ts=1596218850372
01:08 PM jymmmm: Tom_L: Black surfce mount 010
01:09 PM jymmmm: Tom_L: R152 https://i.imgur.com/w7KhdIy.jpg
01:10 PM roycroft: to keep things warm, jymmmm? :)
01:10 PM jymmmm: top right section, just to the upper right of the (+) in sharpie
01:23 PM jymmmm: roycroft: lol, I think the fets do that already
01:23 PM jymmmm: I though I had found the right voltage divider yesterday, unsoldered the resistor, tossed in a pot, and didn't change a thing
02:25 PM CaptHindsight: jymmmm: the input voltage sense will be near where the voltage input is, likely at most only behind a diode
02:26 PM CaptHindsight: R152 looks way off in the output driver section
02:30 PM roycroft: so the other day i attempted to vacuum clamp two big ash boards together, and i was not satisfied with the glue joint in the end
02:30 PM jymmmm: CaptHindsight: There a high (120V) and low (12V) side of the inverter. The microcontroller, SMPS controller, DC-DC converter, and 5V supply are all on that side of the board with input trace being brought over to that area.
02:30 PM roycroft: i was having some issues with the vacuum press, and did not get as much vacuum as i wanted, but i thought it was enough
02:31 PM roycroft: the boards are plenty thick for another go, so at lunch today i decided to see if my little 14" bandsaw could resaw 11" wide ash
02:31 PM roycroft: it worked swimmingly
02:31 PM roycroft: i took it slow, but it had no trouble at all, and the cut was almost dead straight
02:31 PM roycroft: i had been considering getting a bigger bandsaw, but now i don't see the need
02:32 PM jymmmm: CaptHindsight: FWIW this is a 12VDC to 120VAC inverter, 750W/1500 peak
02:32 PM roycroft: ash, btw, is a rather hard, tough wood
02:33 PM roycroft: and that saw still has the 1hp motor on it that it came with
02:33 PM roycroft: i have a 1-1/2hp motor for it, but haven't gotten around to building a new base for the saw and a mount for the bigger motor
02:34 PM roycroft: i think i've had that bandsaw the longest of any of my stationary tools - it's at least 25 years old
06:47 PM skunkworks: Tom_L: yes - and cupboards to hide things even better
07:36 PM _unreal_: the..... UPGRADE https://cdn.discordapp.com/attachments/717411349541683212/738917731151118376/15962420896107010412417595846703.jpg
07:37 PM Rab: https://www.ebay.com/itm/Mini-Bluetooth-Laser-Engraving-Cutting-Machine-Engraver-Printer-Desktop-Tripod-/143603462712
07:47 PM jymmmm: Rab: Just wait till they are $20 in 6 months
07:49 PM Rab: jymmmm, just wondering what could possibly go wrong with a $2 AliExpress tripod.
07:56 PM jymmmm: Rab: Well, if it was a $2 tripod, nothing, But that's a $0.25 tripod, so everything =)
07:57 PM jymmmm: Rab: "You burned your eye out kid!" lmao
07:59 PM jymmmm: CaptHindsight: There is no resistor with ties to VCC on this board. I checked twice. So, I'm going to try and go another way about it.
08:00 PM XXCoder: new engineer baun video. funny as usual
08:41 PM jymmmm: XXCoder: link?/
08:41 PM XXCoder: oops a sec
08:41 PM XXCoder: https://youtu.be/jnICSW7SI9s
08:48 PM robotustra: engineer burns is russian
08:49 PM XXCoder: wow really, all those replies was russia langiage? heh
08:49 PM robotustra: or at least russian speaking
08:50 PM robotustra: did you try to translate comments from russian in google translate? :)
08:50 PM XXCoder: not really but i dont have to understand language to know what language it is
08:51 PM jymmmm: XXCoder: lol
08:51 PM robotustra: russian is difficult
08:52 PM XXCoder: my bro is learning swedish and its pretty cool
08:52 PM XXCoder: i cant remember worth shit so i dont bother
08:54 PM robotustra: https://imgur.com/a/wSDS3ny
08:54 PM XXCoder: lol
08:55 PM XXCoder: is it like modifiers, liek go slow, go fast, go rough?
08:55 PM robotustra: no
08:56 PM robotustra: it's like different tense, plurality, intention, type of moving and so on
08:57 PM robotustra: like "пойдем" = "we will go" or "let's go"
08:58 PM robotustra: there are levels of difficulty of lenguages study
08:59 PM robotustra: russian is in a group 3, chinise and japanese - level 4
08:59 PM robotustra: english - level 1
09:01 PM robotustra: anyway, if you want translate something from russian and not sure in the google translation - ask me
09:04 PM Tom_L: then there's probably slang too
09:04 PM jymmmm: Tom_L: yo momma
09:04 PM XXCoder: fun
09:05 PM jymmmm: 47 words for go?! screw that, let's go!
09:07 PM robotustra: LOL https://www.youtube.com/watch?v=vkdRTZTSCZE
09:10 PM robotustra: Portable time machine for metal aging
09:10 PM robotustra: on the base of time machine
10:17 PM roycroft: so i reglued the chop for my new bench, and it turned out well this time
10:17 PM roycroft: and i've prepped five other parts for glueup
10:17 PM roycroft: all the rough machining is done
10:17 PM roycroft: so i'm entering the second phase of the build, after 34.5 hours of work
10:19 PM roycroft: i also have four giant garbage bags full of wood chips from the project so far, and not a single part has been milled to final dimension yet
10:21 PM * roycroft thinks there's time to do another glueup tonight befor it gets too late, and heads out to do that