User manual

User Manual SCA-SS-70-10
IxR
This potentiometer is helpful to stabilize the speed in a certain range after a change of the
load. First detect the number of revolutions at the lower level, then raise the load and adapt
the speed using the IxR potentiometer.
An optimum precision of the compensation however is not realistic, because the behaviour
of the motor after a load change is only predictable in a certain tolerance.
If the motor current during the alignment procedure starts to oscillate, these disturbances
may be suppressed using the Gain potentiometer.
I max
The following action requires the motor to be operated with maximum load. The motor
current may be measured e.g. using current probe with effective value display, or by means
of an ammeter located in the motor line.
I max decides on the maximum possible motor current.
The following limits have to be observed:
- Left stop: 3 % of rated current of 10 A
- Right stop: 100 % of rated current + (0 – +10 %)
Note:
Do not overheat the motor. For this reason, the I max limit should always be
selected lower than the maximum admissible constant current.
Analog Position Mode
The analog position mode is using a voltage feedback generated by a potentiometer which
is mounted e.g. on the motor axis.
Encoder mode
This is a closed loop speed mode that receives the speed information from the encoder.
The advantage of a better speed regulation is given especially at lower speed.
IxR Mode
The IxR mode is a voltage mode with an additional factor to correct the speed under
changing the load. The speed regulation is good but not stable for all load conditions.
ElectroCraft
®
E-Mail: [e-mail] www.electrocraft.com May 2009
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