Set up using AMC AB15A100 drives, brushed DC motor Prototrak Plus with Encoders

Todd, This is the 1st pics of the "Y" axes, I'm looking for suggestions. The .hal Max_Acceleration is at 2.5 (same as x axes).

Many thanks.

Are you sure the acceleration is set to to.2.5? It doesn't look like it is. (Don't forget you have to shutdown Linuxcnc, edit and save, then restart Linuxcnc before edits to the ini file take effect.

Are you sure you changed all of the correct lines to change the acceleration of the Y-axis?

(Otherwise it looks like the Y could use more FF1.)

Todd, thanks. All looks ok with the ,ini file, it was saved at 2.5. The only line I changed was the MAX_Acceleration. The attached pic is best today for the "Y" axes, I will use the last setting for the x axes that are posted. The "y" axes is not finished yet.
Many thanks.
 

Have you tried higher P settings for the Y? to try to improve the initial error spike?

Todd, many thanks! I will try more "P" & look for spike to improve on "Y". There is no reason to think that 1000 is the max limit for P? I have an appointment this morning, try to be back after lunch, not shore how much will get done today.

Many thanks!

The P value is a double precision float, there is no conceivable practical maximum (there is a theoretical maximum but that is a truly silly number).