DE-STA-CO 722 INTERMITTOR - Manual (Page 12)

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SECTION 4: Installation (continued)
4.1.7. Check the adjustment of the switch cam if your unit has this option. To insure unit
stops in dwell, see Figure 3.
4.1.7.1. A standard roller gear indexer is shown in Figure 3 with a Brake Cam &
Limit Switch shown with the keyway in the center of the dwell period. It
is necessary to phase the Brake Cam such that the input shaft of the
indexer stops during the dwell period of the index cycle while leaving
enough of the dwell period for the input shaft to accelerate to full speed
before leaving the dwell period.
4.1.7.2. If the indexer has a drive code which causes multiple indexes per
camshaft revolution (i.e. X2, X3, etc… drive codes), additional lobe(s) on
the Brake Cam are required. The lobes will be equally spaced.
Therefore, phasing the one lobe of the Brake Cam to one dwell period
on the indexing cam will, in most cases, cause the other lobes to be
correctly phased with the other dwell periods.
NOTE: Controllers are normally shipped loose and brake cam /
limit switches are mounted to the unit. However, neither are set or
adjusted at the factory. Limit switch and cam must be set to initiate
the stopping cycle. Controller must be set for the load & speed of
the application per instruction in the vendor’s manual.
NOTE: The switch and brake cam commonly provided to initiate
the stop cycle can not be used to indicate “on station.” A second
switch and brake cam should be ordered for this purpose.