SAFETY, INSTALLATION AND MAINTENANCE INSTRUCTIONS FOR BRAKE MOTORS AMBY – 3007/12 en Ed. 02.2012
PERIODICAL MAINTENANCE OF BRAKE MOTORS
Every maintenance work on brake motors should only be carried out by qualified personnel, always with the machine out of
operation, disconnected and previously secured against starting.
Brake motors with high-torque D.C. brake (with electromagnetic brake braking in case of failure supply) have got braking torque already preset
at rated plate value, according to catalogue (braking torque adjustment upon braking springs number up to 250Nm
3)
) that means that the
periodical maintenance consists on checking that the air-gap “t”, the minimum friction surface thickness “S
min
” and hand release backlash “x” (if
any) are according the following table:
Brake
size
4)
Motor
size
t
5)
[mm]
S
min
6)
[mm]
x
12MV
63, 71
0,25 …0,5
1
0,6
53MV, 13MV
71, 80
0,25 …0,5
1
0,8
04MV, 14MV
80, 90
0,3 …0,55
1
1
05MV, 15MV
90, 100, 112
0,3 …0,55
1
1
56SMV, 16SMV
100, 112,132
0,35 …0,6
1
1,2
07MV, 17MV
132,160
0,4 …0,8
1
1,2
08MV 160
7)
0,5 …0,9
1
1,2
3) For higher braking torque consult us
4)
Always present on the preassembled part label
5)
Refer to minimum value
6)
Minimum thickness of friction surface on each side of the brake disk (for lower values it is necessary to
replace the brake disk)
7) For bigger sizes consult us
Too high air-gap values could produce a noisy operation and even cause the brake not to be released; excessive air-gap values can reduce the
braking torque to zero due to the clearance taking up of the release lever tie rods.
AIR-GAP ADJUSTMENT
To adjust the air gap value release the fixing nuts I.7 and screw the fastening screws I.3 to reach the minimum value of air gap t according to
above table (measure the air gap in 3 positions at 120° next to the guiding pipe); tighten the fixing nuts I.7 keeping in position the fastening
screws I.3.
Occasionally we recommend to use an air jet to eliminate dust or other particles that may have settled on the braking surface.
After several air-gap adjustments verify that the thickness of the friction surface on each side of the brake disk is no lower the minimum value
stated in the above table; if needed replace the brake disk.
Any repair work within the guarantee period is subject to the motor manufacturer approval.
For any brake motors repair use only original spare parts.
