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afcorson
Australia
Asked
Resolved by Dave Schulpius!
Servos Suited For Legs
Can anyone provide some advice on high torque servos suitable to use for robot legs? I just finished installing the standard EZ robot HDD servos - one in each hip and one in each knee. When powering up, the robot will topple over as these servos are not strong enough to hold it up (the start up position is 90 degrees). My robot is 4' high and the top half weighs a lot more than its legs. I want the robot to slide walk, not lifting the leg at all. CR servos will be in the feet.
Any advice would be appreciated.
Related Hardware (view all EZB hardware)
EZ-B V4
by EZ-Robot
EZ-B v4/2 robot controller: dual Cortex ARM, Wi-Fi, audio/video, 24 servo/digital ports, I2C/UART, camera and Synthiam ARC control for custom robots
Wi-Fi / USB
Servos
24
Camera
Audio
UART
3
I2C
ADC
8
Digital
24
I can picture the movie in my head but the name escapes me. Don’t tell me though. My brain is gonna get it without googling.
I keep picturing the robot bending at the waste and being super stiff in the show. Just can’t seem to get it clear enough in my head. Stay tuned for my eureka moment lol
on topic of the servos - I think you’ll need to visit what the inmoov and similar style robots are doing. Because a servo won’t really have the juice at the price point for what you’ll want.
i think the biloid premium version is a good excample. maybe you need to makea c-type robot and use heavy robotis servo's. aldo they are very expencive.
Come on DJ. Not a movie, think TV. Think spandex.
I'm pretty sure the movie is Buck Rogers in the 25th Century.
I'm not sure how these would work for legs but you could use servo City gear boxes with the recommended servos installed. There are many choices of gear ratios, continuous or with positioning feedback and comes in different mounting options. The ones with the most torque are 3304 oz-in, 0.98 sec/60. These have 7-1 ratio. The problem is the higher the torque the slower the speed. Their pricey between $110 - $270 each depending on how strong you want them. Here's the link: https://www.servocity.com/servo-gearboxes/
Have fun!
Dave
I was supposed to guess!
Oh and also wasn’t a similar robot in space balls?
Yes DJ, you are correct
I highly recommend those Servocity gearmotors, as I am using them on HEMI. The torque on them are awesome.