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Just to add to the story so far for anyone who has the same problem.

Testing the driver board under almost every circumstance it was found that the AL12 alarm comes up on the display for a half...

Encoder (hall effect sensor). However the Japanese parts book describes the sensor unit as a decoder.

Replying to myself I know but...

Looks like it's a problem with the motor decoder. I checked the servo parameter screen and there was no movement for the load, gain and position readings when...

Thanks for the advice. Its is indeed a wired connection not a optical connection so i want to sniff all the signals but i am not getting a signal loss error on the drive. I will check so see if the...

Hello

I have a lathe ( Tsugami NU4B live tool ) fitted with a Fanuc A06B 6078 H112 Spindle servo motor and 0T control. Under MDI, Jog or Auto modes the Spindle is having a seizure.

Symptoms:...