How do I change the motor direction in Machturn. I have the z axis going in the wrong direction and don't want to take it apart.

Also, does anyone have a trick about getting swarf out of a tube while boring? I keep getting lousy finish because the swarf gets caught in the following cuts.

Config menu then Homing and Limits, you can reverse the axis there.

Only way is to get your feeds and speeds right so that you get the metal chipping rather than strining  and have plenty flood coolant to wash them out.

Hood