Mach2 making strange sounds when moving to home position


My Mach2 to it’s making some strange sounds (vibration) when moving to the Home position. It happens in the dec axis moving counter clockwise (north) for the last 15-20 degrees. It will happen with different slew rates I’ve tried both 1200 and 600. It does not happen when I move  the dec axis using the Apcc direction arrows. Only when Apcc is sending the mount to home position. 

Join to automatically receive all group messages.