[Rukam22]

Hello,
I have alarm SP9012 (S1)SSPA: 12 OVERCURRENT POWER CIRCUIT from Spindle Amplifier aiSP15 A06B-6141-H015#H580.
I checked:
-power cable from Spindle Amplifier to Spindle Servo Motor and it is good.
-I measured insulation resistance with Megohm meter from spindle servo motor and it is ok .
On Spindle Amplifier aiSP15 A06B-6141-H015#H580 I have alarm 12.
After Spindle amplifier I have a star delta circuit and I measured cabels and relays and they are good.
I opened the Spindle Amplifier but I dind't find electrical diagram for:
-IGBT A50L-0001-0374 6MBP160RUA060F-01
-OKAYA PC63D630-225K

OKAYA PC63D630-225K:
I measured capacitance from pin1 to 2 = 2.07 uF
pin 2 to 3 = 0
pin 1 to 3= 0
I didn't find electrical drawing.
If someone has changed one of this maybe can help me. (Please check the picture)

IGBT A50L-0001-0374 6MBP160RUA060F-01:
I measured:
From P to W,U,V-0.42V
From N to W,U,V-0.42V
From P to B- 0V
From B to N- 0V
If someone has changed one of this maybe can help me. (Please check the picture)
I didn't find electrical drawing

Some advice will be appreciated for what to change.

[bumzag]

You checked the motor power cables and motor separately for insulation? What were the values? Did you check the phase-to-phase resistance of the motor? It should be basically 0, like 0.3ohms.

Also check each phase to ground. You shouldn’t get a reading, but if you do, then your motor is shorted to ground and is shot.

I’m assuming you haven’t changed any spindle motor related parameters, correct?

I highly doubt you’re going to find the wiring schematic for the spindle drive unit online. If you’ve ruled out the motor being the problem then an AL-12 is almost certainly indicative of the spindle drive unit having some sort of internal fault.

[Rukam22]

Hi,
Motor power cable-ok
motor insulation-ok
phase-to-phase resistance of the motor-ok
I didn't change any parameters.