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POWER TEST INTERFACE BOARD
(50-450 ROTARY)
Measure voltages on interface boards at locations shown to determine normal
operation.
`
STEPPER MOTOR DRIVER CHIPS
50-450 Horsepower
The Electronics group has identified some susceptible driver chip components.
Most of the units were either replaced or retested by the vendor. There is a
chance that some units with this date code will exhibit problems. These chips
have identifiable data codes printed on them.
The two date codes to look for are 89015 and 89018. These codes will appear
on "U14" or "U15" on the starter interface P/N 39182175.
-85-
-86-
REPLACEMENT OF STEPPER ASSEMBLY COMPONENTS
Replacing the stepper couplings:
Begin by removing the air filter element(s).
Remove the stepper motor assembly from the inlet valve body. The stepper limit
switch and male half of the coupling will come off along with the stepper motor,
and motor mounting plate. Remove both halves of the coupling from their
respective shafts.
When installing the male half of the coupling onto the stepper shaft, first open
it with a small screwdriver and then slide it onto the shaft. Leave the shaft end
recessed from the surface of the coupling approximately 1/8" as shown. NOTE!!
Use only the nut and bolt provided by I-R for clamping the coupling. Regular
hardware will cause concentrated stresses within the coupling resulting in rapid
failure. This bolt should be torqued to 150 inch-lbs. Mark a line on the end of
the stepper shaft and the coupling with a permanent marker so that if any rotation
occurs later on, it can be easily detected.
Replace the female half of the coupling on the valve shaft, using the nut and bolt
originally provided. The coupling should be positioned on the shaft so that the
upper surface of the coupling is 1-1/8" from the surface where the stepper
mounting plate mounts on the valve body. This dimension is important as
deviation will cause the coupling to become misaligned. The bolt requires 120
inch-lbs of torque.
Since the female coupling is always 1-1/8" from the stepper motor mounting
plate, a simple tool can be made to allow for easy positioning of this coupling half
on all sizes of Intellisys machines (see drawing).
Содержание Intellisys SSR 10-40
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