Instruction Manual

REVISION 9/04 BJF
50
SETTINGS AND ADJUSTMENTS
SECTION 4-20
Drive Belt Replacement Or Adjustment
COMPARE MEASURED FORCE TO RECOMMENDED
FORCE
Compare the deflection force measured, to the value shown in
the table.
For new belts the value for run-in should be used.
For belts, which have been running two days or more, use the
values for normal running.
ADJUST THE BELT TENSION
Adjust the sliding motor base to increase the belt tension by turning the
adjusting screws clockwise.
When the tension has been increased significantly, recheck it using the
procedure just described.
Repeat the process of adjustment and tension checks until the allowable
deflection is achieved while the deflection force is within the range shown
in the table.
Tension new drives at the maximum deflection force recommended.
Check the tension at least two times during the first two days of
operation. There is normally a rapid decrease in tension until the belts are
run in-
Check the tension periodically after the first day of operation and keep
the tension in the recommended range.
The correct operating tension for a V-belt drive is the lowest tension
that allows NO belt slip under peak load conditions.
If the deflection is more than the specified deflection at the recommended
force,
tighten the belts. If the deflection is less than the specified deflection
at the recommended force, loosen the belts.
TIGHTEN THE MOTOR BASE BOLTS
Tighten down the motor mounting bolts.