[M.RISHIKESH]

Dear Sirs

We have a turning center with Fanuc 0T and alpha drive

Yesterday Alarm 7 on PSM and 11 on SPM appeared only when spindle stops (as per program) in auto cycle and axis moves up.

Today none of the machines running, this machine also showing no errors, we are observing DC voltage to be 320V (range 280 to 325VDC), no error in auto cycle without component or load

Do u suspect improper braking inside SPM causing overvoltage while running on load

Will it help if we replace SPM as incoming voltage is OK ie 206V phase to phase, there is no stabliser to this machine

Pl advice

Thanks

Rishi

[Kellimatherne]

Dear Sirs

We have a turning center with Fanuc 0T and alpha drive

Yesterday Alarm 7 on PSM and 11 on SPM appeared only when spindle stops (as per program) in auto cycle and axis moves up.

Today none of the machines running, this machine also showing no errors, we are observing DC voltage to be 320V (range 280 to 325VDC), no error in auto cycle without component or load

Do u suspect improper braking inside SPM causing overvoltage while running on load

Will it help if we replace SPM as incoming voltage is OK ie 206V phase to phase, there is no stabliser to this machine

Pl advice

Thanks

Rishi

What was the solution to the issues? We had the same alarms yesterday when the spindle was stopped as programmed and manually using M5 command.

[phucrobusl]

Problem in alpha PSM module you have go & repair it.

[Kellimatherne]

Problem in alpha PSM module you have go & repair it.

Thanks! We’ll start there!