#robotics Logs

May 23 2021

08:32 AM subie is now known as AI4AI
10:31 AM Tom_L:
12:42 PM rue_mohr: nothg?
12:54 PM Tom_L: nope
12:55 PM Tom_L: gonna try your spindle idea now about using just the plain analog to the vfd
12:55 PM Tom_L: i can likely predict what will happen though
12:59 PM rue_mohr: its a test tom
12:59 PM rue_mohr: you tune that before you close the loop
12:59 PM rue_mohr: you dont operate the machine without closing the loop
01:00 PM rue_mohr: its just part of tuning
01:00 PM rue_mohr: you get the stability as good as you can open loop, then close it
01:01 PM Tom_L: it will be way too slow on the bottom end i already know this from previous tests
01:02 PM rue_mohr: step test
01:02 PM rue_mohr: you want to know how well it ramps up/down to a speed step request
01:03 PM Tom_L: i've already shortened the ramp up time from 6000 to 20000 with a range of 0-60000
01:03 PM rue_mohr: open loop step tho
01:03 PM rue_mohr: because the vfd has its own control loop int here
01:03 PM Tom_L: i know that
01:03 PM rue_mohr: :)
01:04 PM Tom_L: 100 rpm increments?
01:04 PM Tom_L: no, i'll go 500
01:04 PM rue_mohr: I'd think larger, 1000
01:05 PM rue_mohr: if its gonna overshoot,you want to know
01:05 PM Tom_L: without the pid on the analog it won't go under 4-500
01:05 PM rue_mohr: find its critical damping point
01:05 PM rue_mohr: hu?
01:05 PM rue_mohr: the vfds controller wont?
01:05 PM rue_mohr: where is that manual again?
01:06 PM Tom_L: not with the bare analog signal
01:06 PM rue_mohr: I think it should
01:06 PM rue_mohr: tho there would be a lower limit
01:09 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/PDF/BLDC/
01:09 PM Tom_L: see you in garf out in the shop
01:10 PM rue_mohr: GlockCNC+1200+Watt+Brushless+Spindle+Motor+Driver.pdf
01:12 PM Tom_L: i gotta figure out how to unhook the encoder though
01:13 PM rue_mohr: no
01:13 PM rue_mohr: you want that to measure the speed
01:13 PM rue_mohr: hmm
01:14 PM rue_mohr: can you just disable the PID I wonder?
01:14 PM Tom_L: i may be able to leave it on
01:14 PM Tom_L: i think i can
01:14 PM rue_mohr: have it just send a command voltage?
01:14 PM Tom_L: i'm out the door
01:14 PM Tom_L: see you there
03:20 PM -!- #robotics mode set to +o by card.freenode.net
06:52 PM -!- #robotics mode set to +o by ChanServ
06:53 PM rue_mohr changed topic of #robotics to: robots!, look for us on dalnet or libera
10:44 PM flav0r: DUDES !
10:51 PM rue_mohr: hey!
10:55 PM flav0r: whats up
10:55 PM flav0r: hey has freenode collapsed ?
10:55 PM flav0r: somepeople are talking about that … i dont keep up with that nonsense
11:08 PM rue_mohr: not quite yet
11:08 PM rue_mohr: I think the question is, will the existing freenode get neglected to death by the new owner
11:08 PM rue_mohr: or intentionally killed
11:09 PM rue_mohr: but I dont think a 20 year turf war ends with the victor destroying the prize
11:09 PM rue_mohr: might end with him kicking everyone off tho
11:09 PM rue_mohr: make it a pay service