Seig C3 CNC spindle problem

[Leadhead]

Need help please, with my Seig CNC. This is an early conversion from Arc. Had problems for some time with the front guard micro switch. So took out the switch and coupled the wires together. Solved the problem and all was well until I accidentally dropped the wires and shorted the main fuse. I can now hear the relay clicking in and out as normal but no spindle movement. If you have any inclination towards a possible solution, I would be extremely grateful.

[Chaz]

There might be a main power fuse blown that feeds the spindle (as well as a fuse in line near the spindle's drive). Are you getting power to the spindle drive?

[Leadhead]

Chaz - No just getting the normal audible click on and click off. This is the model with the separate 12v power supply at the back of the column. Having my sparkbuddy check it out in the morning.

[john swift]

have you asked Ketan @arc eurtrade

Photos of the speed control board and CNC interface will be useful

my mini lathe for example has a seig FC250 PWM speed control board with 2 FET's as the control devices
the board has has two relays that form a no-volt release and interlock that forces you to start at minimum speed

later machines have a XMT2325 speed control that uses two thyristors as the control devices that are part of a controlled bridge rectifier

once the various boards have been identified it will be easier to fault find

John

[Leadhead]

John - Thanks for help. I will take some photo`s this morning,

Rod

[Leadhead]

John - Here is photo of board. The two blue wires next to the central small white box are the ones I shorted. The card is marked SEIG MACHINE zz0070201A