Check the disconnect on the electrical cabinet is on and power is supplied

Check that both E-stops are released: on CNC control and operator's station

Turn the "spindle override" pot on the CNC control full CW

Turn the spindle switch on the CNC control to "AUTO"

Check that the spindle lock pin is pulled out

Spindle drive may be in 'fault' condition. Push the red reset button on the spindle drive box to reset the spindle drive. This could be tripped for a number of reasons:

• Too low or too high line voltage

• The duty cycle is too much; cycle time is too short and too often.

• Noise from coolant pump or other contacts

• Acceleration or deacceleration are too short (standard 5hp drive).

• Parameters can be set to change these: see “Inverter Spindle Drive”