#robotics Logs

Sep 16 2017

01:11 AM Jak_o_Shadows: 40 rpm -> 1800 rpm is a factor of 45
01:14 AM Jak_o_Shadows: That's a reasonable amount.
01:14 AM Jak_o_Shadows: So you probably have the torque
01:14 AM Jak_o_Shadows: Big-ass spur gears is not the solution
01:14 AM Jak_o_Shadows: So you have to do things in stages
01:14 AM Jak_o_Shadows: or find something that does it in stages
01:14 AM Jak_o_Shadows: I think i'd be looking at some sort of vehicle transmission?
01:17 AM Jak_o_Shadows: Do you know if your generator is actually gonna be using all that torque?
01:17 AM Jak_o_Shadows: The 1000 ft-lbs?
01:17 AM Jak_o_Shadows: 100*
01:18 AM Casper: I beleive so
01:18 AM Casper: I did a KW to HP conversion, and hp/rpm to torque conversion
01:18 AM Casper: it's only theorical, but it bug me :D
01:19 AM Jak_o_Shadows: It's a lot of torque, but not so much power, if you get me
01:20 AM Casper: yeah
01:20 AM Jak_o_Shadows: What about a belt for the first sae, then something else?
01:21 AM Casper: but actually... I'm wondering if a truck transmission could work... heavy but might... just found some better and more trustable info
01:21 AM Jak_o_Shadows: like, 1:4.5 for the first stage
01:22 AM Casper: mack t-318... 13.44:1 in first gear
01:22 AM Casper: 1800lbft input, that would be....
01:23 AM Casper: 24192lbft at the output
01:23 AM Casper: swap over and it's fine I guess
01:24 AM Casper: hmmm 789lbs dry + 30 pints :D
01:25 AM Casper: ... it's always like that... I do search all day... I ask and I find a potential answer in the minutes after someone reply :D
01:27 AM synja: what a useless human
01:30 AM Casper: I just wonder how well a transmission would like to be run in reverse all the time :D
01:35 AM synja: any possible unnatural damage would be caused by switching
01:35 AM synja: if you kept it in reverse, i see no problem
01:40 AM Jak_o_Shadows: yeah. That's the thing. You don't need a transmission that can change speed
01:45 AM Casper: well, you may want some adjustement
01:45 AM Casper: to fine tune to adjust the speed
04:15 AM Jak_o_Shadows: Motor's are too weak. Left lower motor is a bit broken: https://youtu.be/mulUsQtzRHk
05:32 AM Jak_o_Shadows: I mean, i don't mind the basic design.
05:32 AM Jak_o_Shadows: and sure, most of it will need reprinting if I want to use bigger servos
05:41 AM Jak_o_Shadows: Trying to decide whether I want to go full hog and put big flat brushless motors on
05:41 AM Jak_o_Shadows: I don't think so, not yet at least
06:20 AM SpeedEvil: https://i.imgur.com/8NgkShq.gif on the topic of walking methods. (not really)
08:01 AM weyland|yutani: Jak_o_Shadows, is it supposed to walk at some point?
11:32 AM rue_house: Jak_o_Shadows, hey sweet progress
12:38 PM polprog: i think i have a broken chineese servo
12:38 PM polprog: or i have broken it
12:38 PM polprog: every time i try to set it's position , it sets and then makes a buzzing noise for some time
12:38 PM polprog: especially long when i change the position by a tiny amount like a single degree
12:39 PM polprog: i took it apart beforehand
12:39 PM polprog: and put back together
12:47 PM polprog: it seems to have only 90 degrees of range
12:47 PM polprog: instead of 180
01:02 PM peepsalot: polprog, stripped some teeth on a gear maybe?
01:02 PM polprog: no, nothing like that
01:03 PM polprog: in fact after i removed the screws, took of the cover, it fell on the bench and the gear system fell apart, but i put it back toghether just like it was
01:03 PM linearain: there were a bunch of huge metal gears, each the size of a man, then jumped into them and minced you and your rib cage to shreds
01:03 PM peepsalot: linearain, and a good day to you as well
01:04 PM linearain: hi
01:04 PM polprog: hi
01:04 PM linearain: robots man
01:05 PM peepsalot: linearain, are you one of them?
01:05 PM linearain: i guess... theres something hard beneath my skin
01:05 PM linearain: im an earthen robot
01:05 PM linearain: natural born robot
01:07 PM * polprog takes out his Voight-Kampff machine
07:00 PM Jak_o_Shadows: weyland|yutani, yeah. But I need to do the chest region, and the back legs