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-   -   Motor Controllers Stop Working Below 50% Power in Labview (http://www.chiefdelphi.com/forums/showthread.php?t=154292)

RoboBucs 26-01-2017 16:48

Motor Controllers Stop Working Below 50% Power in Labview
 
Rather than gear down our motors, we are trying to just drop the percentage of the power going through the motor controller in Labview. This works until we hit 50%(.5). Anything below 50.1% no longer works, as if no signal is going through to the motor controller. It is a spark motor controller if that helps.

Mark McLeod 26-01-2017 16:58

Re: Motor Controllers Stop Working Below 50% Power in Labview
 
You are attempting to use a logic operator on floating point values.
The output of a logic operator is 1 or 0.

If you want to use a button to control the motor, here are some examples: http://www.team358.org/files/program...ControlofMotor

Or try one of these two variations for an axis control, just substitute a single motor for the Drive:

rich2202 26-01-2017 16:59

Re: Motor Controllers Stop Working Below 50% Power in Labview
 
Depending upon various factors, you need a certain amount of power to overcome the friction and inertia in your system. In prior years, that amount was about 25-30% power before the robot started moving.

50% seems a little high, but not unreasonable.

RoboBucs 26-01-2017 17:01

Re: Motor Controllers Stop Working Below 50% Power in Labview
 
So like this?(Asking since I'm using a button layout instead of joystick)
Edit: This still only works above 50%

Ether 26-01-2017 17:19

Re: Motor Controllers Stop Working Below 50% Power in Labview
 
Quote:

Originally Posted by RoboBucs (Post 1636773)
Rather than gear down our motors, we are trying to just drop the percentage of the power going through the motor controller

Drop it by how much?



RoboBucs 26-01-2017 17:31

Re: Motor Controllers Stop Working Below 50% Power in Labview
 
We figured it out, I misread Mark's reply, his solution corrected the issue. I appreciate the help!


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