#linuxcnc Logs

Oct 14 2023

01:51 AM Deejay: moin
03:38 AM -!- #linuxcnc mode set to +v by ChanServ
04:27 AM Tom_itx: morning
04:39 AM Tom_itx is now known as Tom_L
04:48 AM JT-Cave: morning
05:06 AM rmu: https://www.youtube.com/watch?v=rfSAW3zDQ7M
07:07 AM JT-Cave: rooster just crowed
07:16 AM * JT-Cave is so close to getting a working BP configuration
08:32 AM Tom_L: cool
08:33 AM Tom_L: like 50F cool :)
08:48 AM JT-Cave: same here going for a ride at Wolf Creek after break fast
08:49 AM Tom_L: lemme know when you want a build done
08:59 AM JT-Shop: ok, still working out some bugs and adding missing inputs
11:06 AM rmu: anybody watching the eclipse
11:07 AM * roycroft watched the clouds block the eclipse
11:07 AM roycroft: i saw the 2017 total eclipse
11:08 AM roycroft: this annular eclipse was supposed to be pretty spectacular
11:08 AM roycroft: but it's a bad time of year for eclipse watching here
11:12 AM rmu: it's already getting dark here. no eclipse to see except via livestream
11:12 AM rmu: dark as in the sun is setting
11:22 AM CaptHindsight: overcast and rain here
11:23 AM pcw--home: full clouded over here
11:30 AM asdfasd: anyone seen rob_h recently?
01:23 PM -!- #linuxcnc mode set to +v by ChanServ
02:40 PM travis_farmer: Eureka !!!! tool probing works!!! thanks to the help from andypugh on the forum! many many MANY THANKS!!!
02:42 PM roycroft: congratulations on the successfull probing
02:42 PM roycroft: now you can feel as fulfilled as eric cartman
02:42 PM travis_farmer: lol
02:43 PM travis_farmer: i still have to tidy up some routines, and re-check, but HUGE progress
02:45 PM * roycroft wonders when automotive lamps doubled in price
02:45 PM travis_farmer: when they started lasting shorter
02:47 PM roycroft: i just went out to the shop and fortunately i have the one i need in stock
02:47 PM roycroft: but it's a headlight lamp, so i'll need to pick up a spare right away - i always keep a spare in stock
02:48 PM travis_farmer: lucky, it is usualy the one you don't have that blows ;-)
02:51 PM * roycroft has always tried to keep spare lamps in stock, but doesn't have a spare of every single one
03:00 PM roycroft: my prius has drl, so headlamp replacement is a somewhat frequent thing
03:00 PM roycroft: i drive most of my vehicles with the headlights on all the time anyway
03:03 PM rmu: how many types of headlight lamps are there is US?
03:03 PM rmu: here i can basically remember only type "H4" and type "H7"
03:03 PM travis_farmer: many
03:04 PM travis_farmer: H4 and H7 are getting more popular though
03:05 PM rmu: do they still sell new cars with incandescant bulbs?
03:05 PM travis_farmer: yes, unfortunatly
03:08 PM rmu: obviously the way to go is LED. unfortunately it's not that easy to legally retrofit LEDs into an older car
03:09 PM travis_farmer: and some people, like my father, don't like LEDs
03:14 PM roycroft: i love led lamps
03:15 PM roycroft: they are problematic in california for retrofitting, though
03:31 PM rmu: travis_farmer: in the living room LEDs may need getting used to, but in the car? as headlights? what is there not to like?
03:33 PM travis_farmer: they don't have as much 3d definition at night on snowey roads
03:35 PM travis_farmer: they are near the same color as snow, so it just reflects light. with yellow incandescent the snow shows more definition
03:35 PM XXCoder: my home have been all led for years nopw
03:38 PM rmu: that is not my exerience but I guess that depends
03:40 PM travis_farmer: sounds like a transformer blew somewhere... huge explosion sound just now...
03:42 PM Tom_L: led are more sensitive to mains fluxuations
03:42 PM travis_farmer: that they are. they flicker all the time...
03:42 PM travis_farmer: poor filtering
03:45 PM XXCoder: ohhh new machine thinking video
03:45 PM XXCoder: https://youtu.be/KnpSHo6iip4
03:45 PM XXCoder: excellent as usual
03:46 PM travis_farmer: i really should be better at putting out videos...
05:00 PM Hermann2: for a tandem axis gantry i have two closed loop servos, is it possible to setup some kind of interlock as when each joint is moving i can get use a "zero-speed" signal from the drives and do a AND operation on the two signals to e-stop the system if one of the signals is not active?
05:13 PM CaptHindsight: Hermann2: yes
05:13 PM pcw--home: Yes, you can do that in hal. Maybe a fault signal would be better
05:14 PM CaptHindsight: heh, no reply for 10 minutes and we answer seconds apart
05:15 PM Hermann2: i have falt-state signal connected and working, but worst case if somehow the step/dir signals fails it still would not know that
05:16 PM CaptHindsight: or if power to one servo goes out
05:16 PM pcw--home: So, yes, there are all manner of logic functions available in hal
05:17 PM CaptHindsight: how about if the coupling breaks on one servo? If the encoder is only on the motor then it won't fault
05:18 PM pcw--home: a fancier way would be to have independent encoder feedback to LinuxCNC
05:18 PM Hermann2: what signal-pin should be used for when the joint/axis is in travel moving?
05:21 PM Hermann2: yes indeed i a encoder feedback would be the best, but i have not made any connections to the mesa card, as the drives are closed loop
05:38 PM pcw--home: you may want an exclusive-or gate between the "zero speed" signal (perhaps with a 1 ms or so filter)filter
05:38 PM pcw--home: so if the differ, you trigger a fault
05:39 PM pcw--home: if they differ
05:47 PM Hermann2: Seems like a good idea, thanks for the help :)