Society of Robots - Robot Forum

Mechanics and Construction => Mechanics and Construction => Topic started by: Hertz32 on January 08, 2010, 08:17:23 AM

Title: sumo robot servos or motors??
Post by: Hertz32 on January 08, 2010, 08:17:23 AM

as name implys for a sumo robot wich is better servos or motors??? thx

Title: Re: sumo robot servos or motors??
Post by: rgcustodio on January 08, 2010, 05:07:20 PM

IMHO, for sumo-bots mass and traction (grip on the playing surface) is important.
Servos (modified for continuous rotation) have more mass than motors BUT motors have a better selection of wheels/tires.

Servos
+ mass
- wheel/tire selection
- number of I/O pins needed

Motors
+ many wheel/tires to choose from (adds slightly more mass)
+ modify torque by changing gear sets (adds slightly more mass)
+ one I/O pin for motor driver
+/- you need a motor driver (adds slightly more mass)
- less mass

Everything else depends on your programming skill.

I really like the design of this sumo-bot:
http://www.huv.com/miniSumo/seeker2/index.html (http://www.huv.com/miniSumo/seeker2/index.html)

Title: Re: sumo robot servos or motors??
Post by: Joker94 on January 08, 2010, 08:33:37 PM

here is the tutorial admin wrote and it uses servos.

i like the tut alot :D

http://www.societyofrobots.com/robot_sumo.shtml (http://www.societyofrobots.com/robot_sumo.shtml)

Title: Re: sumo robot servos or motors??
Post by: SmAsH on January 08, 2010, 11:10:48 PM

In my opinion, for a sumo i would choose dc geared motors... Just because of the reduced mass and not really needing feedback too much...

Title: Re: sumo robot servos or motors??
Post by: Hertz32 on January 09, 2010, 02:44:13 PM

wat bout this one
http://www.active-robots.com/products/motorsandwheels/robot-drive-systems/EMG30%20Mounting%20bracket.htm (http://www.active-robots.com/products/motorsandwheels/robot-drive-systems/EMG30%20Mounting%20bracket.htm)