Thread: Robot Jumping on Power Up
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Unread 14-03-2005, 10:08
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Mike Betts Mike Betts is offline
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Re: Robot Jumping on Power Up
Quote:
Originally Posted by MikeDubreuil
I did not realize that! Can you explain why 132 is neutral? Thanks.
Mike,

See the data at the beginning of this thread. I confirmed the data by experiment. The Victor has a zero output when given PWM values of 125 to 138 (mean 132).

A lot of the referenced thread goes into what might be causing the problem. I do not know why the Victors are non-linear. IFI claims that that they are linear (see this) but this assertion is not backed up by experiment.

I have attached my data, taken with this year's kit frame, gearbox, CIM motors and wheels using the kit Hall effect sensors counting sprocket teeth with the frame on blocks (free speed except for bearing and gear friction).

However, this is getting off topic...

Regards,

Mike
Attached Thumbnails
Click image for larger version Name: Chart Victor Test.JPG Views: 304 Size: 65.2 KB ID: 3100  
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Mike Betts

Alumnus, Team 3518, Panthrobots, 2011
Alumnus, Team 177, Bobcat Robotics, 1995 - 2010
LRI, Connecticut Regional, 2007-2010
LRI, WPI Regional, 2009 - 2010
RI, South Florida Regional, 2012 - 2013

As easy as 355/113...