Optional Threshold Adjustment - Electric Proportional Controls - Danfoss H1B 060 Service Manual

Service Manual
H1 Bent Axis Motors, Size 060/080/110/160/210/250 cm3
Adjustments
Optional threshold adjustment – Electric proportional controls
© Danfoss | August 2018
Adjusting threshold on test stand
1. Connect flow meter to A or B system port. Refer to
locations.
2. Connect solenoid to PWM signal generator at 150 Hz.
Threshold is the electric signal when the motor starts to change from maximum to minimum
displacement.
3. Run prime mover at operating speed.
Threshold adjustment
adjusting
screw
3 mm
4. Adjust PWM signal to current listed in model code. Note flow reading.
5. 5. If adjustment is necessary, remove cap (B0040). Using a 3mm internal hex wrench, turn adjusting
screw clockwise or counterclockwise until flow starts to change from maximum. Test your adjustment
by lowering the current, then increasing the current until the displacement starts to change. Readjust
the setting if necessary.
6. When threshold is adjusted correctly, stop prime mover, install cap (B0040), and install motor on
vehicle. Run vehicle and test for proper motor operation.
Adjusting threshold on a machine or test stand without flow meter
1. Install 600 bar [10,000 psi] gauges to ports M5 and M4. Connect solenoid to PWM signal.
2. Raise wheels off ground, or disconnect the work function.
W
Warning
Unintended movement of the machine or mechanism may cause injury to the technician or
bystanders. To protect against unintended movement, secure the machine or disable/disconnect the
mechanism while servicing.
3. Run prime mover at operating speed. Stroke the pump to get some rotation of motor shaft.
4. Increase signal current until M4 pressure becomes 1/2 of the M5 pressure. Check the signal current at
this point.
5. If adjustment is necessary, remove cap (B0040). Turn the adjusting screw until the signal current
matches the model code setting.
6. When threshold is adjusted correctly, stop prime mover, install cap. Run vehicle and test for proper
motor operation.
7. Remove from test stand.
Ports and Gauge Information
B0040
on page 26 for port
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