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Re: Motor Spin Direction
Posted by Thomas A. Frank.
Engineer on team #121, The Islanders/Rhode Warrior, from Middletown (RI) High School and Naval Undersea Warfare Center.
Posted on 9/12/2000 1:40 PM MST
In Reply to: Re: Motor Spin Direction posted by Nate Smith on 9/5/2000 9:52 PM MST:
: : Is there a significant difference in the efficiency of the drill motor spinning clockwise vs. counterclockwise? On our 2000 Robot, which had a tank-drive setup, we had to scale the output of one motor when the robot was going forward, and the other motor going when it was going backward. Is this typical?
: I've noticed this same thing in the machines that I've worked on...and I remember seeing other teams comment on it here before...your best solution, rather than scaling, is find a way where the motors can be positioned so they are both going the same direction when going forward or reverse.
Hello All;
Yes, there is a difference in efficiency depending on with direction the drill motors turn. They are constructed (timed) to provide more power when rotating in the direction that one uses to drill/drive screws IN. We've measured about a 20% difference between the directions of rotation.
Nate is right, it is best if you can set things up so that the motors are 'matched', rather than trying to trim things in software. But, when all else fails...
Tom Frank
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