Inhibiting The Control; Trimpot Adjustments; In Case Of Difficulty - DART Controls CONTROL Serie Manual Del Usuario

Note: Always use a shielded cable when connecting to the inhibit terminal. The shield of the cable should connect to the
Common terminal of the control.
Using inhibit input - provides fast start-
stop by bypassing accel/decel circuit
Inhibit (P1-9)
Common (P1-8)
Pot Low (P1-7)
Pot Wiper (P1-6)
Pot High (P1-5)
P1
Before the power is applied, the speed potentiometer and trimpots should be preset as follows:
TRIMPOT PRESET
1. Preset speedpot fully CCW, preset Max trimpot CW 1/2 way, preset Current Limit trimpot fully CW, preset Min trimpot
fully CCW, preset Accel trimpot CW 1/2 way, preset I.R. trimpot fully CCW.
DC power can now be applied to the system and the control adjusted as directed below:
TRIMPOT ADJUSTMENT
2. Increase the MIN trimpot in a clockwise direction until just before reaching an output voltage (deadband) or until the
desired minimum speed is reached.
3. Turn the Speedpot fully clockwise and adjust the MAX trimpot until the desired maximum speed is reached.
4. Adjust the ACCEL trimpot to achieve the desired soft start time. CW rotation will increase accel time.
5. Rotate the CURRENT LIMIT trimpot fully CCW. Apply a full load to the motor. While motor is stalled adjust the
CURRENT LIMIT trimpot CW until a desired current setting is obtained. Approximately 125% of rated motor current is
recommended.
6. Set speedpot to approximately 50% and note the motor RPM. Load the motor to normal load condition and adjust I.R.
trimpot CW until motor RPM is equal to unloaded speed.
PROBLEM
Motor doesn't run
Motor "hunts"
Motor runs at "full speed"
uncontrollable
Motor rotates in wrong direction
Motor stalls under a light load
If a newly installed control will not operate, it is likely that a terminal or connection is loose. Check to make sure connections
are secure and correct. If the control is still inoperative, refer to the following chart for reference:

INHIBITING THE CONTROL

SPST Switch
open = run
close = stop

TRIMPOT ADJUSTMENTS

IN CASE OF DIFFICULTY

POSSIBLE CAUSE(S)
• Incorrect or no power
• Speedpot set at zero
• Worn motor brushes
• Current limit set too low
• Max trimpot set too high
• I.R. Comp. trimpot set too high
• Loose speedpot connections
• Min. or Max. trimpots not properly adjusted
• Possible control failure
• Motor armature hooked up backwards
• Current limit trimpot improperly adjusted
Inhibit via speedpot - provides starting and
stopping through accel/decel parameters
Inhibit (P1-9)
Common (P1-8)
Pot Low (P1-7)
Pot Wiper (P1-6)
Pot High (P1-5)
P1
Install proper service
Rotate speedpot fully CW
Replace motor brushes
Adjust current limit trimpot CW
See "Trimpot Adjustments" - page 3-4
See "Trimpot Adjustments" - page 3-4
Secure all connections
See "Trimpot Adjustments" - page 3-4
Send to Dart Controls, Inc.
Reverse armature + and - leads
See "Trimpot Adjustments" - page 3-4
4
5KW
SPST Switch
Speedpot
open = stop
close = run
Orange
Red
White
CORRECTIVE ACTION