I am not sure whether this forum is right place or not.

Couple of days ago, I got KT-2525 I ordered from K2.
I assembled and connected with my controller.

I setup all axes and tried to move step motors.

All 3 motors looked fine, but the issue happened when I tried to drive motor high frequency.
When I tried to dirve motors around 3000Hz or more the motors just made "Why~~~ng" noise and not actually moved.
but low freequence around 500Hz it worked.

500Hz / 200 step / 10 tpi * 60 sec = 15 ipm. Is this normal or what?

I am using HobbyCNC controller configured 24V drive with upto 15A.
My computer is about 133MHz pentium CPU.
Step motors are purchased from HobbyCNC 200 oz motors.

Show me the way