#robotics Logs

Aug 30 2020

01:52 AM veverak: state space motion planner
01:58 AM veverak: but quite big and complex space state
02:15 AM Jak_o_Shadows: Who on earth would want a 16+ or 24 servo driver
02:15 AM Jak_o_Shadows: just makes cable management too painful
02:20 AM veverak: lately I figured that "BUS" servos are golden
02:20 AM veverak: the fact that you can chain servos in a row? AWESOME
02:20 AM Jak_o_Shadows: Yep. Absolutely
02:21 AM Jak_o_Shadows: I mean, i've made my own little PCB
02:21 AM Jak_o_Shadows: but have you found any commercial ones?
02:24 AM veverak: https://www.hiwonder.hk/products/hiwonder-lx-15d-serial-bus-servo?_pos=2&_sid=55e397972&_ss=r
02:26 AM Jak_o_Shadows: ah, whole servos
02:27 AM Jak_o_Shadows: I might stick to my own PCB then.
02:27 AM Jak_o_Shadows: Version 2.0 might feature current sense or something
02:31 AM Jak_o_Shadows: but anyway, hexapod reassmbled with new hip joint
03:47 AM Phrkd is now known as Phreaked
05:08 AM mrdata_ is now known as mrdata
10:32 AM rue_mohr: a stadard servo vs a serial bus servo is just a tiny13 difference
10:32 AM rue_mohr: or like $100 if you get one premade
10:33 AM rue_mohr: oh they finally came down
10:33 AM rue_mohr: so, $2 vs $20
10:33 AM rue_mohr: er. heh
10:33 AM rue_mohr: $2+tiny13 vs $23
10:34 AM veverak: not really
10:34 AM veverak: you can't get this servo for $2
10:34 AM veverak: metal gears + torque
10:35 AM rue_mohr: yea
10:35 AM rue_mohr: my point is you can get a standard servo for $2 and add a tiny13 to make it a serial bus servo
10:35 AM rue_mohr: but wouldn't have the metal gears etc
10:35 AM veverak: but it's not fair comparison if you pick cheapest ass servos
10:35 AM rue_mohr: :)
10:36 AM rue_mohr: usually in the volume I want to use them, I need the cheapest ass servos
10:36 AM veverak: having serial servo is one thing, having one that can do something relevant is different :)
10:36 AM veverak: yeah, cheapest that can manage the work
10:36 AM rue_mohr: didn't you see my arms?
10:36 AM rue_mohr: they turned out ok
10:37 AM rue_mohr: a few of them have over 40 hrs continious operation on them too
10:37 AM rue_mohr: maker fairs
10:37 AM rue_mohr: I was impressed they didn't completely fail
10:38 AM veverak: by my calculations
10:38 AM veverak: the LX15D should be able to move the robto on two legs
10:38 AM veverak: out of 4
10:39 AM veverak: with some torque reserves
10:39 AM rue_mohr: k
10:39 AM veverak: but that's with original estimate of 2kg weight
10:39 AM veverak: that change
10:39 AM veverak: s
10:39 AM veverak: :)
10:40 AM rue_mohr: I was working on a gang controller to use gutted cheap servos, but I was including force feedback
10:41 AM rue_mohr: need to finish my air muscle feedback demo