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1. Gsd1 DC Drives User Manual Overview

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DjUSTMenTS

Before the power is applied, set the voltage selection jumper to the correct voltage. An incorrect

jumper setting will not damage the drive, but will affect the trim pot adjustments. The speed

potentiometer and trim pots should be preset as follows:

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reset

1) Preset Speed pot fully CCW�

2) Preset MAX trim pot CW 1/2 way�

3) Preset CURRENT LIMIT trim pot fully CW�

4) Preset MIN trim pot fully CCW�

5) Preset ACCEL trim pot CW 1/2 way�

6) Preset IR trim pot fully CCW�

DC power can now be applied to the system and the DC Drive adjusted as follows:

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DjUstMent

7) Increase the MIN trim pot CW until just before reaching an output voltage (deadband), or until the

desired minimum speed is reached�

8) Turn the Speed pot fully CW and adjust the MAX trim pot until the desired maximum speed is

reached�

9) Adjust the ACCEL trim pot to achieve the desired soft start time�

(CW rotation will increase accel time�)

10) Rotate the CURRENT LIMIT trim pot fully CCW� Apply a full load to the motor� While motor is

stalled, adjust the CURRENT LIMIT trim pot CW until a desired current setting is obtained�

(Approximately 125% of rated motor current is recommended�)

11) For 10A models GSD1-48-10C:

Set the Speed pot to approximately 50%, and note the motor RPM� Load the motor to normal load

condition and adjust the IR trim pot CW until motor RPM is equal to the unloaded speed�

For 20A models GSD1-48-20C:

Adjust the IR trim pot CW 1/2 way� If the motor speed is inconsistent ( jumpy), rotate the IR trim pot

CCW until the motor rotation becomes stable�

12) If the voltage selection jumper setting is changed, repeat Trim Pot Preset and Trim Pot Adjustment�

roUbleSHooTinG

If a newly installed DC Drive will not operate, it is likely that a terminal connection is loose. Check the

terminal connections and ensure that they are secure and correct. If the drive is still inoperative, refer

to the Troubleshooting Table.

Problem

Motor doesn't run

Motor "hunts"

Motor runs uncontrollably at

"full speed"

Motor rotates in wrong

direction

Motor stalls under a light load

IronHorse GSD1 DC Drives User Manual – 2nd Edition, Revision B – 10/12/2018

Troubleshooting

Possible Cause(s)

1) Incorrect or no power

2) Speed pot set at zero

3) Worn motor brushes

4) Current Limit set too low

1) Max trim pot set too high

2) IR Comp trim pot set too high

1) Loose Speed pot connections

2) Min or Max trim pots improperly

adjusted

3) Possible drive failure

Motor armature hooked up backwards

Current Limit trim pot improperly adjusted

Corrective Action

1) Install proper power service

2) Rotate Speed pot fully CW

3) Replace motor brushes

4) Adjust Current Limit trim pot CW

1) Refer to "Trim Pot Adjustment"

2) Refer to "Trim Pot Adjustment"

1) Secure all connections

2) Refer to "Trim Pot Adjustment

3) Contact ADC Returns for

replacement (800) 633-0405

Reverse armature + and - leads

Refer to "Trim Pot Adjustment"

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