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INDEX TABLE |
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CONSTRUCTION
& OPERATION
When
you order a table, the dial plate is bored for the number of stations required,
whether even or odd indexing (See Specifications for minimum degrees between
stations). Since the two shot pins are 180 degrees apart, odd indexing
requires a bushing 180 degrees from each indexing location. Any station or number
of stations can be missed by simply removing the cam button of the Dial Plate
which corresponds to that station. (Ex. - 3 indexes require 6 station, which
could also be used for 2 or 6 indexes).
The dual shot
pins, 180 degrees apart, provide the accuracy of the Dial Plate. Combined
with
Hydro-Clamp, the top plate is securely held in
location while the work for that station is performed. The hollow steel centerpost
(1 1/4" hole)
can be used for piping air, oil, or coolant to the fixtures or the work pieces.
The Hydro-Lift actually lifts the Dial Plate slightly so that the Index Table
can carry a heavy load without dragging.
The Deceleration
Unit will slow down the table just before the final location. This permits smoother
indexing and better repeatability, making the table more suitable for larger
Dial Plates.
SEQUENCE
OF OPERATION
With
hydraulic power supplied to the Index Table (500 psi @ 3 gpm), both solenoids
should be energized. This puts the table in the main speed. The shot
pins are
lowered, which actuates the internal valving to allow the hydraulic motor to
energize. At the same time, the Hydro-Lift is energized which lifts the Dial
Plate clear of the bearing ring. The Dial Plate will now rotate. When the cam
button on the edge of the Dial Plate contacts the first limit switch, the deceleration
solenoid is de-energized, putting the table in the deceleration mode. Upon rotation
to the stop limit switch, the stop solenoid is de-energized also. At this time
the shot pins raise, shutting off the hydraulic motor, and the Hydro-Clamp energizes.
The Dial Plate clamps down to the bearing ring and the shot pins locate firmly
in the bushings, giving the table its positive location. The Index Table remains
clamped until the signal is given to start next cycle.