User manual

User Manual SCA-SS-70-10
4.4.1 Setting of the Jumpers
Mode Current Set Value via
Tacho
Control 0 – 10 A 0 – 5 A 3 – 7 A 5 – 10 A
Offset -
pot Connector
Note: Advanced information’s about the jumpers refer chapter 5.3.
4.4.2. Adjustment procedure for Tacho mode
1. Potentiometer pre setting refer chapter 5.2.
2. Choose the maximum set value (e.g. 10 V). Turn the potentiometer n max, until the
desired maximum speed is reached with unloaded motor.
3. Adjust the current limiter to a value requested by you with the I max potentiometer. It
is of major importance that this value is lower than the maximum admissible constant
current (see motor data sheet). To measure the motor current use a current probe in
one of the motor cables with an oscilloscope or a multimeter, or the Monitor I output.
4. Slowly raise the value of the Gain potentiometer. If the motor begins to work
unsteadily, to vibrate or to cause excessive noise, carefully lower the gain factor
again, until the instability symptoms have disappeared for all load selections
5. Set the set value to zero and adjust the Offset potentiometer, to the standstill of the
motor.
WARNING:
Correct polarity of the tacho is crucial. Otherwise the motor operates at maximum
speed without any control.
ElectroCraft
®
E-Mail: [e-mail] www.electrocraft.com May 2009
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