Check if unit stops in dwell. Generally, the center of dwell is on the
opposite side of the input shaft from the cam. (See also "Cam & Limit
Switch Functions" in the General Service Manual.) These drawings show the
keyway location in the middle of the dwell period for the three types of
Is the output shaft backlash-free? Be sure to disconnect all other devices
from the indexer output including a CAMCO overload clutch. All indexers must be
backlash-free in dwell (See Looseness
in one dwell and Looseness
in each dwell.)
How is the unit being checked? We use a computer controlled checking
machine which checks each index against the theoretically perfect index.
Contact Camco for
assistance. We keep inpspection reports for Special Accuracy units (units which
are required to be within closer tolerances than standard).
Improper input systems (where there is not a constant velocity input)
will cause an erratic output or excessive output vibration. This will
result in forces several times higher than calculated (see
Input does not run at a constant velocity. The prime objective of a good
input connection to an Index Drive is to maintain a constant shock-free
velocity (see input recommendations). Motor
running too slow could also cause an erractic input.