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SETTING NEUTRAL
The preceding procedure is used at the factory to do the
initial setting of the encoder alignment. Then factory alignment
marks are placed on the end bell for the position of the notch on
the feedback assembly, and on the motor shaft and encoder
magnetic wheel to show the alignment of the encoder parts. The
previous procedure can be bypassed if the factory marks are
plainly evident and the motor has not been rewound.
Installing a new encoder on the motor or reinstalling the old
one may be done by the factory marks as long as the motor is
properly assembled. Then it is necessary to set the actual position
of the feedback assembly to set the neutral of the encoder. This is
the fine tuning of the encoder alignment.
PROCEDURE
Connect a true RMS AC voltmeter to motor leads T1 and
T2. Do not use a peak-reading meter.
Run the motor with no load at rated RPM in the forward
direction and note the AC voltage level on the meter.
3.
Run the motor in the reverse direction at rated RPM
and note the voltage on the meter.
Adjust the feedback assembly (by loosening the two
mounting screws) a few degrees left or right to equalize the AC
voltage in both directions within one percent.
POW ERTEC "F" Series Motor Manual
MOTOR THERMAL SWITCH
-- There is a motor temperature thermal switch in the motor,
inserted in the stator windings. The motor thermal switch leads
are located in the main junction box. THIS MOTOR THERMAL
SWITCH MUST BE USED TO PROPERLY PROTECT THE
MOTOR! Failure to use this switch may result in the destruction of
the motor. Brushless DC motor thermal switches work better than
their brush-type DC motor counterparts because the heat in a
Brushless DC motor is produced in the stator, where the switch is
located.
The motor thermal switch is rated as follows:
MAX AMPS BREAK:
8 amps @ 240VAC
2 amps @ 24VDC
CONTINUOUS AMPS:
© copy right 2012 by P O WE R TEC Industrial Motors, Inc.
Page
12 amps @ 120VAC
2 amps at all voltages above.
9
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