Netmos 9865 pci parallel port help

Make the timings longer and also the base thread.
That will smooth the drives.
Regards,
Tom

tommylight wrote: Make the timings longer and also the base thread.
That will smooth the drives.

I don't think this is true.

It actually is for chinese drives. Cheap drives use slow optocouplers that tend to be very picky for timing and also very slow to react.
The drive power set low can do that same choppy movement, but that can be checked by lowering the machine velocity.
Regards,
Tom

I am sorry Andy, i just read my post again and it says "drives", i meant motors.

What is a good starting point for max_acceleration and max_velocity? Thanks.

That depends, how heavy are the moving parts, how powerful are the motors, gear reduction?
These are the settings I have on an old Digitaltool CNC router, 20 inches/sec^2 acceleration rate and 10 inches/sec (600ipm).
But what will work best for your machine will depend on your machine.

For the most part you will want to set the acceleration as high as you can without loosing steps even at the highest speed you will use, minus a safety margin.