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Manual SINCOS
16 MA 2066-A006 GB
5.2 Phase Current Setting
With the I
DRIVE
and I
STOP
potentiometers, drive current and stop current can be adjusted
indepently from another to values from 0 to 100% of the maximum value.
As the following figure shows, the true values can be measured with instruments.
The SINCOS has to be set to the full step mode!
Fig. 9: Phase current measuring
5.2.1 Stop Current
In general, the stop current should be adjusted to approx. 50 % of the drive current, in
order to avoid excessive heating of motor and power stage. With the potentiometer I
STOP
the motor current during motor standstill can be adjusted.
5.2.2 Drive Current
The drive current (run current or operating current) I
DRIVE
should be adjusted as low as
possible (empirical determination). To measure the current please proceed as follows:
1. Wire measuring instruments as shown in the figure above.
2. Set full step mode.
3. Activate a STOP input signal.
4. Apply a control pulse signal (approx. 20 to 50 Hz).
5. Adjust the required drive current by means of potentiometer I
DRIVE
.
Warning:
If the STOP input signal would not be activated during current adjustment, the current flow
direction would change after each control pulse and the instruments might be damaged.