P
USH
C
ORP,
I
NC.
AFD92
Manual
11
4.0 Adjusting Carriage Preload
The required preload on the
AFD92
Linear Rails has been set at the factory for optimal
performance and, in general, should not require field adjustment. However, there are
situations that could arise that cause the Linear Rails to need adjustment, or
replacement. Often a loose, or tight, Carriage on a new AFD is indicative of an
improperly designed process equipment bracket. If the problem disappears when the
brackets are removed then this is the case. Normally the Carriage will only require
adjustment after removal for field service.
To check for a loose Carriage, attempt to move the Carriage in a lateral direction as
shown in Figure 6. If the Carriage moves or seems to exhibit any "slop", then the Linear
Rail preload must be readjusted. A dial indicator is helpful, but not necessary to
diagnose and correct a loose Carriage.
A Carriage that is too tight will require additional force to move. This is often detected
during the weighting of the process equipment mounted on the Carriage. The weight
will be inconsistent, varying higher or lower each time the process equipment is
weighed.
Figure 6. Carriage preload adjustment
The Linear Rails are attached to the underside of the Carriage with (6) six M10x1.5
Socket Head Cap Screws. Located on the side of the Carriage are the two Preload
Adjustment Set Screws used to translate the Movable Linear Rail. Moving the Linear
Rail associated with the Preload Adjustment Set Screws is all that is necessary to adjust
the Carriage preload.
Copyright
PushCorp, Inc.
2006. All rights reserved