Extend Acceleration Feed Forward

Default: 0
Range: 0 to 65535

 

The Extend Acceleration Feed Forward causes the controller to give extra drive while accelerating and a braking drive while decelerating (negative acceleration) in the extend direction. The drive due to Acceleration Feed Forward is calculated as follows:

 

image\ebx_434302159.gif

 

The Acceleration Feed Forward provides a second order approximation ( prediction ) of how much drive is required to move.

If the position unit is 0.001 inches, this equals millivolts of drive per 100 inches per second per second.

Why Bother?

The acceleration feed forward helps the axis track better while accelerating or decelerating. The acceleration feed forwards should not be adjusted until the velocity feed forwards are adjusted correctly.

 


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