Warner Electric ER 825 and 1225 Normal Duty - Manual (Page 7)

7 Warner Electric • 800-825-9050 P-250 • 819-0122
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.
Step 9D: After armature is engaged, slowly
decrease (counter-clockwise) the voltage adjust
to the brake until the brake armature releases.
Record this voltage.
Step 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 V.
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.
Step 10A: Follow Step 9 for adjustment of brake
control for ER-1225.
Step 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.
After completion of installation procedure
and brake control adjustment it may be
necessary to burnish (wear in) the brake in
the application.
Note: The brake is pre-burnished at the factory
but during the installation and handling of the
brake, static torque may have been affected.
Therefore, burnishing on site is recommended.
Step 11: Burnish the brake as follows: This step
requires you to run the machine that brake is
used in. Observe all safety rules and
regulations for your facility. Using the brake as
the primary stop device, start and stop the
brake 30 times. Allow 5-10 seconds delay
between Start and Stop.
During torque measurements
machine power should be turned off and
properly locked out.
Step 12: With the brake fully engaged, attach
torque wrench to the end of the brake shaft.
Hold the wrench at the handle, and pull it in
the direction of motor rotation in one
continuous motion (without any jerky motion)
until shaft movement is detected. The highest
reading on the dial is the static torque of the
brake. This torque without any system drag
must be at least 400 lb. ft. for ER-1225 and
125 lb. ft. for ER-825. If less, burnish the
brake again, repeating Step 11. If the brake
does not meet the torque requirement after
two burnishing procedures, replace the brake.
The brake installation procedure is now
complete.