No tool installed testing unit by "Air" cutting circular pocket. Rise and fall sound is the 130 in.oz. steppers accelerating and decelerating. Using Oregon Micro Systems Stepper Drivers on all 3 axis, Campbell Designs breakout Board, and 24 Volt regulated Power Supply. Part being cut is a precanned Wizard in the MACH3 CNC software.
That is the sound of one of the stepper motors. The X axis I think.
Jim
smallrcer 2 years ago