INFICON SRT-422 Crucible Indexer - Manual (Page 35)

Installation Page 33
SW6 -- This switch defines the relationship between pocket 1 and pocket 2 of the source. It
should be set at the same sense, which the Indexer should rotate to move the source
between pocket 1 and pocket 2, e.g. clockwise or counter clockwise. The setting of
switch 6 determines the direction of hearth rotation in unidirectional mode and the
primary rotation direction in bidirectional mode. For both uni- and bidirectional
operation, the orientation of pocket numbering (i.e., which direction is “forward” or
upward though the pocket numbers) also changes depending on the setting of DIP
switch 6. The figure below illustrates this in the case of a 4-pocket source. When DIP
switch 6 is on, the indexer will operate such a source as if its pockets were numbered 1-
4 counterclockwise (hearth rotates clockwise). When this switch is off, the indexer will
operate the same source as if its pockets are numbered 1-4 clockwise (hearth rotates
counterclockwise). The same principle applies to all other source types.
1
4
3
2
HOME
OFF
4
ON
3
1
2
HOME
CLOCKWISE/COUNTER-CLOCKWISE FROM MOTOR'S POINT OF VIEW
Figure 3.5: Orientation of pocket numbering changes depending on the setting of DIP switch 6
(Note: The output shaft of the index drive unit rotates counterclockwise when D/P switch 5 is
on and clockwise when this switch is off. Because of the effect of the internal gears in the
sources supported by the SRT-422, output shaft rotation is in the opposite direction from
hearth rotation.)
NOTE
When planning for multipocket deposition, it is critical to bear in mind that
the setting of switch 6 determines the orientation of pocket numbering.
The pockets of a 4-pocket source must be thought of as being numbered
1-4 in a clockwise direction when switch 6 is on and 1-4 in a
counterclockwise direction when switch 6 is off.
SW7, SW8 -- Rotation Speed and Torque As shown, Switch 7 and 8 allow you to select
between three speed and torque settings. If high speed is selected (switch 7 and
8 OFF) the indexer will seek out the next pocket, when commanded, at the
highest speed rate. If mid-speed is selected (switch 7 OFF and switch 8 ON) the
indexer will seek out the next pocket at an intermediate speed and torque. If
low-speed is selected (switch 7 OFF, switch 8 ON) the indexer will produce the
highest torque while seeking out the next pocket, however it will be at a Lower
speed.