Dynamatic 15-539-0015 Инструктивный лист - Страница 12

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c. When the clutch is being torque limited, decrease the setting of the torque damping

potentiometer r18 CCW until instability (hunting develops. Then increase the setting CW until

stability is attained. Recheck the Torque Limit setting as described in step 11b and readjust if

necessary.

12.

Torque Limit PCB 15-444-2

a. Apply a load to the motor and note the motor current (IR) a load of 50% of full load or more

is desirable.

b. Check the motor nameplate for full load current (IF) of the motor.

c. Connect a voltmeter across terminals 1 and 2 and measure the voltage (VR) at a motor current

of IR

d. Calculate what the voltage would be across terminals 1 and 2 at full load:

VF= Current xfmr output voltage at full load

VR= Current xfmr output voltage at reduced load

IF= Motor current at full load

IR= Motor current at reduced load

e. Disconnect the leads to terminals 1 and 2 on 15-444-2 Modification board and connect a

variac

Adjust the variac for VF and adjust the Torque Limit pot until the output speed of the drive

just begins to decrease. Increasing the output of the variac slightly will cause the speed of

the drive to decrease sharply. When making this adjustment DO NOT exceed 75 volts out of

the variac.

g. Torque Limit Damping- Follow the procedure outlined in step 11c. A load must be applied,

and the circuit must be limiting torque to make this adjustment.

13.

Run/Jog switch to Jog. Push down the Start pushbutton, the drive will run at the selected slow

speed as long as the Start pushbutton is depressed.

(If normal load cannot be applied)

Stop the controller, set the Run Speed pot to some slow speed and set the

()×( )

VF=