posted Aug 18, 2011, 12:20 AM by Jonathan Dowdall
It has been a couple of weeks now since the public launch of the site, and the feedback from the Prodos Thingiverse page
has been great, so I thought I'd capture a bit of it here.
Tillin9 Might want to look at the Lynxmotion Biped Scout: http://www.lynxmotion.com/c-67-scout.aspx I always their SES (Servo Erector Set) could be efficiently 3D printed instead of made from aluminum.
Would love to see it really walk with something like HSR-5590TGs.
Saturday, August 06, 2011, 18:48:12
jdow That's a cool robot ... and at under $200 it is a good value. Based on the close up pictures, it doesn't look like there is any positional feedback from the servos. A single one of these servos you mentioned (HSR-5590TGs) is almost more than the robot! Maybe too expensive for a hobby project? For the next prototype I've been looking at the T-Pro MG996R 55G
which has some nice specs for a $12 servo. Do you have any suggestions for a good servo in the under $20 range?
Tuesday, August 09, 2011, 08:37:54
so how will you attach stronger motors?
Saturday, August 06, 2011, 13:34:42
jdow The next prototype will be a bit larger to accommodate beefier servos. I've been experimenting with 55g servos
and been pretty happy with the results so far. I've also redesigned the joints to avoid having to use the radial ball bearings.
Saturday, August 06, 2011, 21:30:24
This is an awesome project! What would be really awesome is modding the brackets for use with Dynamixel AX-12A or AX-18A actuators. With the ability to create movements by just positioning the actuators it would bring another level of ease to the process.
Sunday, August 07, 2011, 16:14:37
jdow The Dynamixel actuators have a lot of really nice properties ... I especially love the daisy chaining, rotational feedback, and the torque. I had looked at using them for the next prototype, but thought (perhaps foolishly) that I'd try and come up with a positioning solution for a cheaper servo. The next version will need to have 6 DOF per leg (for static balancing) which would add up really quickly if each servo was $45 or $95 I've been experimenting with radial potentiometers for feedback and have had promising results so far.