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

[Web Goblin]

Looks like the motor is inverter driven.
1- Some inverters will shut down depending on what type of fault they see on the motor windings and some don't, they just blow up.
2- As above
3- Any oil should not have been able to pass between the gearbox and the motor as there should be oil seals on the shaft connecting them so I wouldn't think that would be the problem.
4- You would need to separate the motor from the gearbox first before stripping down the motor. Testing it electrically would be the first step. Disconnect it from the inverter and check each winding to ground. They should all show a high resistance between the windings and ground, in the megaohms range. Then test each winding to the other two. They should show equal resistance for each winding between each other and depending on the motor this could be quite low, ie a few ohms.
5- If the motor has gone down it could quite easily take the inverter with it if it does not have any overload or short circuit protection.
6- These inverters are normally repairable particularly if it is a standard pcb type. Most decent electronics repair shops should be able to do this.
If this is the second time this has gone down I would get the motor checked out to ensure it is ok and seriously think about upgrading the inverter to give you some protection from the motor faults.

Meant to add that most manufacturers will quite happily sell you another board as its good for their sales figures and dont do repair work.