M23CL Internal fuse blowmn

Contrepointe

Hello everyone,

I am currently building a CNC,

I have a problem with my M23CL motors with brake.
the internal fuse of my two motors has blown.

I don't understand where this could come from, the motors worked correctly after their settings, correct movement on X and Y, and this evening when turning on the machine, I made a homing and clack, no more red LEDs, no more movement!

Diagnostic = INTERNAL FUSE failure

I would like to replace this fuse but I don't know these values, could you please send them to me.

So could you tell me a possible cause of this problem?

I use a high quality 48V power supply. The motors are connected to a Duet 3 Tool Distribution Board and are powered by it.

Thank you for your help

Clement

Contrepointe

Contrepointe

dc42

@Contrepointe the fuse part number is 0468002.NRHF or 0685T2000-01.

These fuses don't normally blow if the motor has a permanent connection to the PSU because the slow rise in PSU output voltage when it is powered up limits the surge current drawn by the motor. However, if the PSU is powered up first and then the motor is connected to the PSU, the surge as the capacitors in the motor charge may blow the fuse. See the blue box at https://docs.duet3d.com/Duet3D_hardware/Duet_3_family/Duet_3_Motor_23CL#power-wiring.

Contrepointe

@dc42

Thank you for your quick feedback, it is very much appreciated.

The motors are connected to the Duet 3 Tool Distribution Board which is powered directly by the 48v power supply, they are therefore energized as soon as I turn on the electrical cabinet (red M23CL LED flashes), I checked the voltage of the cable power supply of the motor, I am at 48v permanently.

The motors are equipped with a brake, I noticed that the brake is 24V, wouldn't it be a problem to power the motors with 48V?

The fuse blew when I engaged the motors (M17 Y X), releasing the brake.
Could switching on the motors create an overvoltage and blow the fuse?

Thank you very much for your help.