Hello!
I'm converting a Brother TC211 drill and tapping center to UCCNC with closed loop steppers and I am now stuck with the spindle motor, its a Toshiba ac servo motor
named RA 10M 1500w 220v, and thats the only thing I got on it, cant find any info on the net about it.
I want to run this with a vector vfd but the problem is that I do not know the main frequency of the motor, I have tried several different values: 50hz 75hz 100hz 150hz 200hz 250hz 300hz but the motor just cogg its way forward very slowly.
I had the same problem when I converted a Dahli with a fanuc spindle servo, at 50hz it behaved like this one but when I changed to 100hz it worked like a charm.
Anyone have a clue?
And what is this main/standard/basic frequency by the way and why does it matter? why does it need some basic frequency when the frequency is variable?
Here is a picture of the top cover of the resolver on the motor.
Stripped bare:
Closed loop steppers, 4.5Nm on X and Y and 12Nm on Z:
New electronics:
Added encoder for spindle feedback and rigid tapping: