DPRG mailing list archives: [DPRG] help with 6-legged walking robot

Mon Jun 25 07:41:58 CDT 2007

The servos that you are using - the FS 100 are very low on torque. They have only 24 N cm or 34 oz in in US units. You would need to either make the frame MUCH lighter in weight or use more powerful servos or both.

I don't know what is available in your area, but there are servos that are not super expensive that have a much higher torque.

See http://www.servocity.com/html/hs-635hb_high_torque.html which has 83 oz in at 6 volts (or about 2.5 times more torque)
or http://www.servocity.com/html/hs-985mg_super_torque.html which has 144 oz in at 6 volts (or about 4.2 times more torque)

Thanks,

Glenn

----- Original Message ----
From: Francesco.Decomite <Francesco.Decomite at lifl.fr>
To: dprglist at dprg.org
Sent: Monday, June 25, 2007 3:06:24 AM
Subject: [DPRG] help with 6-legged walking robot

Hi,
I am trying to build a siw-legged walking robot. No problem with the 
programming part : using Microchip pic4620, I can control effectively 12 
servos, and tested the program with those 12 servos (see picture : 
http://www.flickr.com/photos/fdecomite/526512679/)
Then I build on leg (picture : 
http://www.flickr.com/photos/fdecomite/526513399/), everything still ok
The problem arises when I put everything together :
http://www.flickr.com/photos/fdecomite/539468397/
http://www.flickr.com/photos/fdecomite/539369120/
http://www.flickr.com/photos/fdecomite/539483411/

The machine seems to be too heavy, and the servos seem to ask for much 
more power I can give them.
Any hint on how to control this power demand ? SOme mechanical or 
electronical solution, or at list some pointers ?
Thanks !

-- 
Francesco De Comite
tel (33) 03 28 77 85 72
fax (33) 03 28 77 85 37
www.lifl.fr/~decomite

_______________________________________________
DPRGlist mailing list
DPRGlist at dprg.org
http://list.dprg.org/mailman/listinfo/dprglist

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://list.dprg.org/pipermail/dprglist/attachments/20070625/aac312ba/attachment.html