Peter,
The Unimat is used in the mill configuration with stepper motors on all axes including the Z axis.
The picture shows the setup after milling a dust cap for a French bicycle crank. The 23.35M1 thread had already been cut using a single point thread cutter. Unusual tasks like lense caps are ideal for this setup.
The system is limited by the Z axis range and cutter reach but after that will cut any diameter, pitch and rotation.
There also seems to be confusion on my CNC setup. For simplicity and cost, I use an open loop approach. If the stepper motor does not go where I tell it because it stalled, I need to start over at a lower feed rate. Typical Unimat tasks do not stall a stepper motor.
Royce
