6.3 Motor Start-up
During the following steps the
motor will be rotated. If excessive
speed or incorrect direction of rotation
could damage the load, it may be wise
to de-couple the load until proper
control is verified. Output can be
monitored with a voltmeter by
measuring SCALED ARMATURE
VOLTAGE at TP9 or by measuring
armature voltage.
Step 3
Turn the external speed pot to zero
or full CCW and press the RUN
pushbutton. The RUN LED should be
ON.
Increase the speed pot setting to
20% and observe acceleration to set
speed. The MOTOR LED should turn
ON at approximately 6% output.
Observe the direction of rotation; if
necessary, correct by removing control
power and reversing the motor armature
or field leads. If used, observe proper
polarization of the series field winding
per the instructions in Section 4.2.
Proper tachometer operation can be
checked while running in AFB mode
and comparing the SCALED
TACHOMETER VOLTAGE signal at
TP18 to the SCALED ARMATURE
VOLTAGE signal at TP9. If the
tachometer feedback signal level is
close to the AFB level, it can be safely
used for feedback.
Step 4
Stop and O-Stop functions should
be tested initially from a low operating
speed. Refer to Section 4.4 for
descriptions of these stopping methods.
Step 5
Increase the speed pot setting to
maximum. Use the P8, MAX SPEED
pot to adjust for rated armature voltage
(240 VDC), or desired motor maximum
speed. After the desired maximum
speed has been set, decrease the speed
pot setting to minimum and set the
desired minimum speed with P10, MIN
SPEED.
Step 6
Test the JOG function and set
desired JOG speed.
6.4 Calibration and Fine Tuning
Refer to the description of
adjustment potentiometers in Section
5.2. Most of the P22194-1 adjustments
are straightforward and self-
explanatory. Those discussed below
have more complex functions or
adjustment procedures.
IR COMPENSATION
As mentioned before, the IR COMP
is functional only in the AFB mode and
is used to keep motor speed from
decreasing as load is increased.
Adjustment is best done when the
motor or machine can be loaded
normally. If the motor is normally
operated at a particular speed, adjust the
P3, IR COMP pot while running at that
speed. If the motor operates under load
over a wide speed range, pick a speed
near mid-range to make the adjustment.
Adjust as follows:
Operate the
unloaded
motor at the
normal or mid-range speed and note the
exact speed. While monitoring speed,
apply normal load. The reduction in
speed of a fully loaded motor will
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