[FTC]: Motors

[JesseK]

On the subject of motors, does anyone more specs on the motors? Specifically I'm looking for current draw specs -- Stall Current and Free Speed Current. Here's what I have so far:

Stall Torque = 300 oz-in = 2.12 N*m (slightly less than a CIM)
Free Speed = 152 RPM

This is all gravy for figuring out how fast a drive train goes, but not good enough to figure out if the motors will survive pushing match after pushing match. Then there's the question of how hard you're straining the motors by lifting the robot arm with some weight at the end of it. Anyone?

[gblake]

Originally Posted by JesseK

On the subject of motors, does anyone more specs on the motors? Specifically I'm looking for current draw specs -- Stall Current and Free Speed Current. ...

Does this info from Robert May and on the LynxMotion site match up with the Type and Model number of the motors that were actually shipped with the kits? - If so, I think you can get most if not all of what you want from it. Robert dug it up back in March for the teams that were prepping for the "Showcase Tournament".
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Thursday, March 20, 2008
Gearhead motor specs
For those interested, I was able to find the following specs along with the posted link to a data sheet for the Hsiang Neng motors.

Model= HN-GH12-2413T
Weight = 7.15 oz
Reduction = 50:1
Stall Torque = 231.5 oz-in
Length (motor and gear) = 2.33" (5.92 cm)
Length (shaft only) = 0.89" (2.26 cm)
Diameter (motor and gear) = 1.45" (3.68 cm)
Diameter (shaft) = 6mm
Outside Diameter = 37mm
Current (at 12v no load) = 145mA
Current (at 12v locked shaft) = 3.8A

http://www.lynxmotion.com/images/data/ghm13.pdf
Posted by Robert May at 4:12 PM

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Blake