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We were searching but could not find any error within the servo amplifier or motor.

But then we realized that the emergency-stop circuit was changed when the machine was...

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We had no time for experimenting with the mini contacor and so we ordered a repaired and tested servo amplifier for the Z-axis.

The problem was obviously in the unit...

Hi,

we do have some bad luck with our Fanuc controls lately....

We have a OKK machine with a Fanuc 18M control.

In the last time the machine stops sporadically during work with two alarms...

Hi,

we have a Mori Seiki milling machine with a Fanuc 10M control and AC-Servos.

In the past we had sporadic SV013-Errors (Improper V-Ready Off Alarm) from the Z-Axis but could usually clear...

Hi,

we have a Mazak SQT 18 MS (Mazatrol T Plus control) in the shop. The last few days, the machine is not starting up in the morning.

After switching the cnc-control on, we are receiving an...

Hi,

we have a Mori-Seiki MV-40 in the shop. The old lady is still going strong...

...but now she has a problem.

When searching for the Y-Axis reference point in the morning, the machine...

Could you figure out the source of yuor problem, because we have the same error here.

Alarm 8 and after a few restarts in the morning, the machine is running for the rest of the day.

@CNCDiag, Thank you!

@All

Feedback:

The machine is running again!

We bought a second Fanuc VCU / Axis-Amplifier on eBay.

Thank you, for your response!

Yes, it is a DC-Drive.

I will check the Tacho-Generator next time I'm there together with the original VCU.

But would this always blow the first fuse as it is...

Update:

We have shot 2 Axis Amplifiers of this type on eBay.

The first one came today in and I compared all the jumpers. They were all identically configured.
The trimmer positions were also...

Thank you for your input!

As far as I know, this axis driver doesn't use IGBT's. It is a DC - Drive that is realised with a 3-Phase Thyristor-Bridge.

We also noticed that the cnc-control...

Hi,

we have a Takisawa Lathe with a Fanuc 6T controller in our shop.
It used to blow one fuse on the Z-Axis driver input from time to time in the past. Always the same leftmost fuse (and the...