Denford Triac VMC w/ ATC conversion

[JAZZCNC]

Yes, thats a 30Year old machine. they used bergerlahr 5fase steppers, with a strange driver as well.

Even stranger then because 5 phase steppers give much lower Step angles due to having 10 poles. This is why they were used because the gave greater resolution and lot smoother running because of smaller rotor steps. They also increase in torque when Ms rather than loose torque like 2 phase steppers do.
The down side being more PPR required compared to 2 phase motor.

The first Smaller leadshine Hybrid Servo motor used 5 phase steppers for this reason. 2Nm Hybrid servo motor gives a 3nm 2 phase motor a run for it's money and is lot smoother.