#robotics Logs

Feb 23 2020

12:03 AM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1150288.jpg
12:09 AM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1150289.jpg
12:09 AM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1150290.jpg
12:09 AM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1150291.jpg
12:09 AM rue_mohr: my transformer worked out!
12:09 AM rue_mohr: tl494, 0.001uF, 50kohms for 40Khz
12:09 AM rue_mohr: er, but I need the osc to run at 80
12:09 AM rue_mohr: 0.001uF, 15k
12:09 AM rue_mohr: error + 's to ground
12:09 AM rue_mohr: error -'s and output control to ref
12:09 AM rue_mohr: dead time to ground
12:09 AM rue_mohr: feedback N.C.
12:11 AM rue_mohr: then the motor driver uses two IR2110
12:12 AM rue_mohr: which leaves me needing signal steering and timing control
01:17 AM rue_shop1: or instead of two IR2110 I use HIP4081
01:18 AM rue_shop1: oh yea, ok
01:19 AM rue_shop1: so, if I use the 8041 I dont need the steering logic
01:19 AM rue_shop1: ok
01:19 AM rue_shop1: more so, its smaller than two IR2110
01:20 AM rue_shop1: I have some 8 pin high/low side drivers comming , so its biger than them,
01:20 AM rue_shop1: +- they need the steering logic
01:20 AM rue_shop1: k, so...
01:21 AM rue_shop1: $1.50ea
01:22 AM rue_shop1: so, not the cheapest option
01:22 AM rue_shop1: I'v got quite a spectrum I could use for this project so far
01:22 AM rue_shop1: I have opto circuits good for 500kHz, and transformer isolation stuff
01:22 AM rue_shop1: quite a list of options
01:24 AM rue_shop1: I have some discrete drivers
01:25 AM rue_shop1: if I were doing a pcb, I could more easily use lots more parts that would make the proejct cheaper
01:31 AM rue_shop1: I wonder if I should be running the motor at 170V instead of 25
01:31 AM rue_shop1: for the torque, I still need 20A tho
01:32 AM rue_shop1: I wonder what the torque constant is for these motors
01:36 AM rue_shop1: hmm
01:36 AM rue_shop1: according to this, even locked rotor I cant get 20A
01:37 AM rue_shop1: hmmm
01:39 AM rue_shop1: <rue_mohr> error + 's to ground
01:39 AM rue_shop1: <rue_mohr> error -'s and output control to ref
01:39 AM rue_shop1: <rue_mohr> dead time to ground
01:39 AM rue_shop1: <rue_mohr> feedback N.C.
01:39 AM rue_shop1: 1, 16 to ground
01:40 AM rue_shop1: 2, 15, 13 to 14
01:41 AM rue_shop1: 4 to ground
01:41 AM rue_shop1: o/p are 11, 8
01:42 AM rue_shop1: 3 n.c.
01:42 AM rue_shop1: ah, 5 is 0.001uF to gnd
01:43 AM rue_shop1: 1 is 15k to ground
01:43 AM rue_shop1: 6
01:53 AM Jak_o_Shadows: I got some free samples :D
01:53 AM Jak_o_Shadows: back in the day
02:02 AM rue_shop1: mine might have been too
02:21 AM katsumi_ is now known as simion
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02:22 AM honeyb0t is now known as honeyb0t_
02:23 AM honeyb0t_ is now known as katsumi
07:26 AM X-Scale` is now known as X-Scale
08:51 AM X-Scale` is now known as X-Scale
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10:47 PM cloudia is now known as katsumi