Test Operation; Adjustment Of Motor Speed - Mitsubishi FREQROL-SFJ Maintenance Manual

3.6
Test operation
Connect the motor shaft to the machine shaft directly._
Run the machine and perform the following check:
(1) Does the true motor speed meet the given reference speed?
If no, make adjustment in accordance with the instruction
in 3.7.
When it is verified that the motor and machine are in good
condition, operate the motor and machine under load condition
to check.

3.7 Adjustment of motor speed

All FR-SFJ controllers are adjusted, before shipment, in ac-
cordance with the order specifications.
speed reference signal is used, however, voltage drop caused
by signal line may cause deviation, and requires fine adjust-
ment.
When FR_SFJ uses option card SF-TLJ and is connected to M300
series CNC through bus line, or uses option card SF-DAJ for
digital speed reference signal, no deviation occurs and there-
fore readjustment is not required.
In this case, OD El is to
Adjustment procedure:
(1) Set speed reference signal to the forward run minimum
speed and record the motor speed displayed by the 7-seg-
ment LED readout of controller (record the speed as NIP
determined from the following formula, for parameter
No. OB El.
Max. motor speed with command
signal voltage at 1OV (rpm)
be
When the desired motor speed is N,, (rpm), set
N lr - N 1~
When analog voltage
set to 1000.
x 2048