Help for MOTOR 2.2 Kw and control board optimum BF46 milling machine

[Web Goblin]

I was busy looking at the pictures when irving replied. The box is as he says a mains filter. If this was faulty it would cause the fuse in the supply plug to blow and not the ones on the control pcb.
You could remove the heatsink clamps from the six power transistors at the rear of the board and check to see if any of them look cracked or burnt. If the motor windings check out ok with your test meter you would need an insulation tester to further check for any insulation faults to other windings or ground.
Have you tried powering up the control pcb without the motor attached to see if it blows the fuses?