[hutch07]

Hello all,

I have put a new motor on a Kasper (Rasoma) inverted lathe and it runs fine until I try high speeds (100% rapid) and I get a Fanuc Alarm 438. The screw seems fine and the ways look good. I did read the other thread - http://www.cnczone.com/forums/servo-...amplifier.html - and was going to try and "tune out" the motor temperature sensor. If that is it I can swap motors.

Does anyone know the parameter for this? I have another motor but wanted to troubleshoot it a bit first.

[ifixcnc]

What control? I think you can jump out the thermal.

[zavateandu]

you didn't said why you decide to change the motor
first try to dismount the coupling between the motor and the axis and run the motor 100% and check if something happend.
if nothing happendt han you have a problem in the axis ballscrew or slideway
abnormal current allarm is generated by the driver and not by the motor
i had one month ago this with huge vibration of the motor when it stand still.
when i installed a new driver i had on drive the abnormal current
so i had to change the motor too for that to work
so better try a new motor .

[hutch07]

Thanks - I will try that.

[rohitjyoticnc]

Also Check break circuit, Brake connector properly, intermidiate workinkg of brake will also a cause for these alarm