Warner Electric ER 825 and 1225 Heavy Duty - Manual (Page 6)

6 Warner Electric • 800-825-9050 P-251 • 819-0121
D. ER brakes are polarity sensitive. Connect the
plus terminal of the brake to terminal 6 on the
control and the minus terminal of the brake to
terminal 5 on the control.
Step 7:
Apply power to the brake and remove
shims. Note: It may be required at this point to
adjust voltage to brake, to release the armature
and remove shims.
Set the airgap by pressing the
armature into contact with the magnet and then
releasing. (See Figure 3) The armature should spring
back approximately 1/32-3/64 (.031-.045) inch. If
the airgap is outside of that range, reposition the
armature hub assembly by procedure Section III and
steps 4 and 5 of the assembly procedure Section I.
Note: If armature does not spring back proceed to
voltage adjust procedure.
Step 8:
Brake Release Voltage Adjustment. When
setting the brake power supply, the objective is to
achieve armature release by adjusting the coil
voltage so it counteracts the permanent magnet to
the maximum extent possible.
Two different release procedures are used,
depending on whether an ER-825 or ER-1225 is
involved. For ER-825 brakes, follow the procedures
outlined in Step 9 below. For ER-1225 brakes,
follow the procedures outlined in Step 10.
Step 9: For ER-825 Brakes
Put machine in a safe condition
so that when voltage is applied to control and
switch closures are made the brake does not
rotate and machine does not run.
9A. Attach multimeter to brake to monitor DC
voltage observing proper procedure for
hookup of multimeter per manufacturing
instruction.
9B. Apply power to control and close switch
connections that allow DC voltage from
control to be applied to brake.
9C. Depending on variable control used and
output channel that brake is hooked up to,
turn voltage adjust knob or screw, counter
clockwise to 0VDC, at this point slowly
increase voltage control clockwise until
brake armature disengages. (Releases)
Record this voltage, continue to increase
voltage until brake armature engages.
Note: If armature does not engage it may be
necessary to manually engage the armature by
pressing on the back side of the armature
keeping fingers from between armature and
magnet.
9D. After armature is engaged, slowly decrease
(counter clockwise) the voltage adjust to
the brake until the brake armature releases.
Record this voltage.
9E. The final voltage setting for the brake
should be the mid point between the
voltages recorded in Step 9C and 9D.
Note: If the autogap is not used, an external
release force of approximately 5-10 pounds
should be applied by hand, to detect the point
of armature release.
Note: If the above voltage adjustment
procedure can not be observed visually the
alternate ohmmeter procedure should be used.
Section IV.
Step 10:
For the ER-1225, the procedure is the
same as Step 9 with the exception of the control
used.
The only two controls to be used are the MCS
805-1 or MCS 805-2, the voltage adjust is
performed by adjustment screw only, located on
inside of control.
10A. Follow Step 9 for adjustment of brake
control for ER-1225.
10B. (For MCS-805-2 only): Set partial
engagement torque using adjusting pot at
top of control. Switch connected to
terminals 7 and 8 must be open to make
this adjustment. A setting of 10 gives
maximum torque.