b)
Connect the tachometer leads so that the positive lead connects to
terminal 9 (“TACH”) and the negative side to terminal 5 (“COM”). If
the drive system is connected for reversing (open chassis control
systems), the tachometer leads must be reversed when motor rotation
is reversed so that terminal 9 is always positive in respect to common.
Polarity can be easily checked by running the control connected for
armature voltage feedback, and checking the tachometer for voltage
polarity as specified.
c)
With the control off, the jumper connecting pins 1 and 2 on the
feedback select 2PL should be changed to connect pins 2 and 3. ( The
jumper can be removed by vertically sliding the jumper off the plug
pins.)
d)
Set the IR pot to zero, fully counterclockwise position. Failure to do so
can cause drive instability when using tachometer feedback.
e)
When running using tachometer feed back, it will probably be
necessary to readjust the “MAX SPEED” adjustment. Rotate the
“MAX” speed fully counterclockwise. Set the speed potentiometer for
maximum speed. Adjust the “MAX” potentiometer clockwise until
motor reaches desired maximum speed or until voltmeter reads 180
volts, whichever occurs first.
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