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PVT mode - "Jittery" motion


vignesh90
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Hello,

 

I'm quite new to PMAC so pardon my ignorance. I need to run two axes of my gantry system in a loop.

 

I'm trying to use PVT mode in the motion program. My code is attached. I have blending enabled (Isx92 = 0) and segmentation time 5ms (Isx13).

 

When I run the program the axes motion is jittery, as if the motor stops after every commanded point. Am I missing something?

 

Any help on how to fix this will be greatly appreciated.

 

Thank you!

UY.pdf

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The most common mistake beginners make in PVT mode is to get the velocity units wrong.

 

The value after the colon specifies the ending velocity in [axis units per (Isx90 milliseconds)].

 

At the default value for Isx90 of 1000, this is axis units per second.

 

The time for the move is always specified in milliseconds.

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Got it. I corrected the velocity and it works well.

 

Thanks for the help!

 

The most common mistake beginners make in PVT mode is to get the velocity units wrong.

 

The value after the colon specifies the ending velocity in [axis units per (Isx90 milliseconds)].

 

At the default value for Isx90 of 1000, this is axis units per second.

 

The time for the move is always specified in milliseconds.

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