Many thanks for your help, Steve, have swopped motor board connectors and the stepper motor runs sweetly, I presume it is the board. By the way it follows the configuration of the board in your picture but has a red 7 seg display!? Can you tell me how to get the board repaired. Many thanks, Martin F...

Steve, It is a RouterNS and has a Denstep board, I can see no evidence of brakes anywhere, Martin. Have disconnected the coupling and tried running the stepper motor, which hums without turning. How do I identify which stepper motor drivers to swap axes there don't seem to be three identical plugs. ...

No, have read that post but it doesn't seem to apply. The stepper motor connects to an aluminium flexible drive but it is an integral unit, black with silver ends square in section, have tried to remove stepper motor for a closer look but the six cable plug does not want to unplug from the motor, is...

On homing the Z axis the stepper motor trys to step but just judders until the emergency stop is pushed. We have cleaned the leadscrews and bearing housings, although when we turn the leadscrew by hand the bearing feels quite rough. Before we strip down the unit 1) Are the bearings sealed units? 2) ...

Many thanks for your quick reply, after re-cleaning the motor brushes the motor is now working! New brushes are in order I think! Do you stock? The spindle is a 'Porter-Cable' Many thanks again.

Spindle motor fails to start even though router runs machining sequence, have checked e-switch and SGR relay (relay is solid state?) Has anyone any ideas, many thanks in advance.