Warner Electric MCS-204, Инструкция по установке и эксплуатации

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18 Warner Electric • 800-825-9050 P-0257-WE • 819-9027
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4. Anti-residual adjustment
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a. Activate the brake-off switch, if used,
or jumper the brake-off terminal to DC
common.
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b. Check that the brake armature floats
away from the magnet with no sticking.
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c. If the armature sticks, adjust the anti-
residual potentiometer CW or CCW until
the armature is free with no sticking.
❑
d. Reapply the brake by either activating
the brake on switch or jumpering the
brake-on input to DC common. Brake-
off input must be open.
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e. Repeat steps 4a through 4d above.
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f. If brake releases freely, the anti-residual
is set.
NOTE: CCW adjustment decreases anti-residual
output while CW adjustment increases it. Setting the
anti-residual too far CW can cause brake engagement.
❑
5. Frequency adjust
The frequency adjust changes the
modulation frequency to eliminate brake
“hum” or “howl” when the brake is
stationary. The frequency is factory set and
normally requires no adjustment.
❑
a. Turn CW if a low pitch hum is
present or CCW if the hum is high
pitched.
*CAUTION: To set the frequency, the control must be
unplugged from its housing. Do not unplug
control unless power is off. Failure to turn
power off before unplugging will result in
damage to control module and/or power
module.
C. Input Calibration
NOTE: The following calibration procedures assume
that the maximum input corresponds to the maximum
(24VDC) output to the brake. An accurate digital
voltmeter is required to properly set up this system.
❑
1. Local torque adjust mode
❑
a. Insure power is on and torque
adjust/span is set fully CCW.
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b. Set the “zero adjust” potentiometer
(through front panel) so the 0-100%
indicator illuminates. This is a true
zero output to the brake.
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c. Now rotate the “torque/span”
potentiometer toward its maximum
setting. As the pot is turned, the
0-100% indicator goes out and
the “brake” indicator comes on. At
100% output (24VDC), the 0-100%
indicator will come on.
NOTE: Depending on the accuracy of the initial
“zero” setting, steps a through c above may have to
be repeated to achieve full range adjustment of the
“torque/span” potentiometer.
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2. Remote torque adjust
❑
a. Insure that power system is on.
❑
b. Set the remote torque adjust
potentiometer to maximum.
❑
c. Set the front pane “torque/span
adjust” to maximum output (24VDC).
The 0-100% indicator will be
illuminated.
❑
d. Set the remote torque adjust
potentiometer to minimum.
❑
e. Set the “zero adjust” potentiometer
so the 0-100% indicator illuminates.
❑
f. Repeat steps b through e above as
these two adjustments will interact
on each other.
NOTE: When the remote torque adjust pot is at
minimum, the brake should be fully released. When the
pot is set to maximum, the brake should be fully on.
❑
g. After the proper “span” adjustment
is obtained, remove the “torque/
span” knob and insert the cap plug
into the hole to prevent tampering.
❑
3. Current source adjust
❑
a. Insure that system power is on.
❑
b. Adjust the external current source
for minimum input current, based on
the operating range selected.
❑
c. Adjust the “zero adjust”
potentiometer so the 0-100%
indicator is illuminated.
❑
d. Set the external current source
to maximum input based on the
operating range selected.
❑
e. Adjust the “torque/span”
potentiometer for full output
(24 VDC) and 0-100% indicator
illumination.
❑
f. Repeat steps b through e to insure
there is no interaction between
adjustments.
NOTE: Set-up adjustment is the same for all three
current range inputs.