Hi Mohamed,

Thanks!

For the 'steps/second' part of the question, when you did the testing, on the Main tab of the driver, what value did you have for 'Speed' Focus Speed?

Source code allows values of 0, 1 or 2

Which looks to directly correspond to Slow or Medium or Fast
as defined in the documents on sourceforge myFP2-307-3.pdf

Had you done any tuning of the motor speeds as given in the document section
FINE-TUNING THE STEPPER MOTOR SPEED
?

Did you happen to try the backlash experiment at different speeds or different stepping, which you mentioned was set to 1/4 step?

This is one area that can cause strange results, how fast driving based on chosen step mode, just looking to rule it out.

Another dealing with stepping is power supply to the phase coils of the motor drooping.

ALT: With your angle of 40-50 degrees, this would seem to present leverage on the drawtube when changing directions, giving it a chance to tilt.

Gene

Read More...