Hi!
I've started a retrofit of my 1989 VMC with Fanuc OM-B. i have previously converted a CNC late and now it is time to do the same with the mill.
The mill in question has a Fanuc 1S Spindle motor (A06b-0750-B100#3000
And i have done a lot of reading in different forums and when looking for a drive for a Fanuc spindle, pretty quickly the CT Unidrive SP's and Motion Guru pops up. So i bought a used SP1406 from eBay that i have started to configure, but i have run in to some problems:
I have tried both in open loop and in closed loop vector mode and in open loop when using the auto tune it runs but the power factor Pr 0.43 changes from default 0.850 to 0.997 and that feels way high. When running the auto tune in closed loop the tune goes successful but the power factor Pr 0.43 changes to 0.027 and some other parameters feels way off. I will list them further down. And after the auto tune i can't run the motor. no trips, and i can press run and hear it trying to spin the motor but nothing happens.
These are the parameters / values I've entered for my motor when setting up the drive in closed loop vector mode:
Pr 0.02 (Maximum speed): 8000 rpm
Pr 0.03 (Acceleration rate s/1000rpm): 2
Pr 0.04 (Deceleration rate s/1000rpm): 2
Pr 0.42 (No. of motor poles): 4
Pr 0.44 (Motor rated voltage): 200V
Pr 0.45 (Motor rated speed, base speed - slip speed): 2760 - 3000rpm (Tried both values)
Pr 0.46 (Motor rated current): 8.6A
Pr 0.47 (Motor rated frequency): 100Hz
In above parameters i have assumed that the motor rated voltage is 200V as it is on the label on the motor.
Also the base frequency i have calculated using a formula i found (frequency = (# of Poles * RPM) / 120) so in my case (4*3000)/120=100Hz.
And the rated current is also from the label (8.6A cont) but i feel it's quite high for a 1.5kW motor?
a few parameters that get changed from the auto tune in closed loop is these:
Pr 5.17 (Stator resistance): 0.400Ω
Pr 5.24 (Transient inductance): 1.768mH
Pr 5.25 (Stator inductance): 12.92mH
Pr 5.29 (Motor saturation breakpoint 1): 69
Pr 5.30 (Motor saturation breakpoint 2): 92
Pr 5.32 (Motor torque per amp): 655.35 N m A-1
I'm pretty sure i have entered something incorrectly and by that messing up the auto tune but i can't figure out what.
I have another regular 3ph induction motor with all the values on the nameplate and after entering those and running a auto tune that motor runs great so that is why i assume i have entered something incorrect on the Fanuc motor.
Any help / advice is very welcome!
Best regards Victor
I've started a retrofit of my 1989 VMC with Fanuc OM-B. i have previously converted a CNC late and now it is time to do the same with the mill.
The mill in question has a Fanuc 1S Spindle motor (A06b-0750-B100#3000
And i have done a lot of reading in different forums and when looking for a drive for a Fanuc spindle, pretty quickly the CT Unidrive SP's and Motion Guru pops up. So i bought a used SP1406 from eBay that i have started to configure, but i have run in to some problems:
I have tried both in open loop and in closed loop vector mode and in open loop when using the auto tune it runs but the power factor Pr 0.43 changes from default 0.850 to 0.997 and that feels way high. When running the auto tune in closed loop the tune goes successful but the power factor Pr 0.43 changes to 0.027 and some other parameters feels way off. I will list them further down. And after the auto tune i can't run the motor. no trips, and i can press run and hear it trying to spin the motor but nothing happens.
These are the parameters / values I've entered for my motor when setting up the drive in closed loop vector mode:
Pr 0.02 (Maximum speed): 8000 rpm
Pr 0.03 (Acceleration rate s/1000rpm): 2
Pr 0.04 (Deceleration rate s/1000rpm): 2
Pr 0.42 (No. of motor poles): 4
Pr 0.44 (Motor rated voltage): 200V
Pr 0.45 (Motor rated speed, base speed - slip speed): 2760 - 3000rpm (Tried both values)
Pr 0.46 (Motor rated current): 8.6A
Pr 0.47 (Motor rated frequency): 100Hz
In above parameters i have assumed that the motor rated voltage is 200V as it is on the label on the motor.
Also the base frequency i have calculated using a formula i found (frequency = (# of Poles * RPM) / 120) so in my case (4*3000)/120=100Hz.
And the rated current is also from the label (8.6A cont) but i feel it's quite high for a 1.5kW motor?
a few parameters that get changed from the auto tune in closed loop is these:
Pr 5.17 (Stator resistance): 0.400Ω
Pr 5.24 (Transient inductance): 1.768mH
Pr 5.25 (Stator inductance): 12.92mH
Pr 5.29 (Motor saturation breakpoint 1): 69
Pr 5.30 (Motor saturation breakpoint 2): 92
Pr 5.32 (Motor torque per amp): 655.35 N m A-1
I'm pretty sure i have entered something incorrectly and by that messing up the auto tune but i can't figure out what.
I have another regular 3ph induction motor with all the values on the nameplate and after entering those and running a auto tune that motor runs great so that is why i assume i have entered something incorrect on the Fanuc motor.
Any help / advice is very welcome!
Best regards Victor