Trimpot Adjustment Procedure - DART Controls 250G CONTROL Serie Manual Del Usuario

TRIMPOT ADJUSTMENT PROCEDURE

TRIMPOT
MAX
SETS MAXIMUM MOTOR SPEED when
speedpot is set at maximum (100% rotation
CW). CW rotation of MAX trimpot increases
maximum motor speed.
SETS MINIMUM MOTOR SPEED when
MIN
speedpot is set at zero. CW rotation will
increase minimum motor speed.
IR
CALIBRATES SPEED REGULATION - Pro-
vides a means of improving motor speed
COMP.
regulation in the armature feedback mode.
If a slowdown due to load change is of no
concern, rotate this trimpot fully CCW.
CUR. LIMITS DC MOTOR ARMATURE CURRENT
(Torque) to prevent damage to the motor
LIM.
or control. The current limit is set for the
rated motor current. CW rotation of this
trimpot increases the armature current
(or torque produced).
ACCEL
ALLOWS ADJUSTMENT OF ACCELERA-
TION by user.
IR
FUNCTION ADJUSTMENT
1. TURN DRIVE POWER OFF!!
2. Connect DC Voltmeter: + to +ARM, - to -ARM.
3. Set meter voltage range: (90VDC or 180VDC).
4. Turn power on. Set speedpot at 100%.
5. Adjust MAX trimpot to rated motor armature voltage as
shown on meter.
NOTE: A tachometer or strobe may be used in lieu of a meter.
Follow above steps, except adjust MAX trimpot to rated
motor base speed indicated by tachometer or strobe.
1. Set speedpot to zero (fully CCW).
2. Rotate MIN trimpot CW until motor rotates.
3. Slowly rotate MIN trimpot CCW until motor stops. NOTE:
If motor rotation at zero is desired, rotate MIN trimpot
CW until desired minimum speed is reached.
1. Set speedpot at 50%,
2. Observe motor speed at no load condition.
3. Apply a full load to the motor.
4. Adjust IR COMP trimpot CW to obtain the same motor
speed as with no load.
1. TURN DRIVE POWER OFF !!
2. Connect a DC ammeter between A1 on the motor and
+ARM on the control. This is in series with the motor.
3. Turn power on.
4. Set speedpot at the 50% position.
5. Set CUR LIM trimpot fully CCW.
6. Apply friction braking to the motor shaft until motor is
stalled (zero RPM).
7. While motor is stalled, set current at 125% of rated
nameplate motor armature current by adjusting the
CUR LIM trimpot.
1. CW rotation increases time of acceleration.
IR
7