INFICON SRT-422 Crucible Indexer - Manual (Page 19)

Operation Page 17
Section 2
Operation
The SRT-422 can be controlled remotely by the output relays of our STC-2002 and
STC-2000A Thin Film Deposition Controllers, or any other system controller. Additionally, it
can be controlled by a remote panel Manual Pocket Selection Switch or through either of two
standard computer interfaces. An Interlock input is provided to assure that rotation of multi-
pocket sources cannot occur while deposition power is being applied to the source.
Section 2.1: Automatic Operation
With the Auto/Man toggle switch in the Auto position (DOWN), the Indexer will be
controlled through the STC I/O Port or the RS232 Computer Interface. The Binary code
applied to the STC I/O port will direct the Indexer to the proper position. Signals are available
which indicate correct pocket position along with the safety interlock described above.
Section 2.2: Stalled Motor Indication on 7-Segment Display
In addition to indicating the current pocket location the 7-segment LED provides a stall
or jammed source indication. This is done by alternately flashing the 7-segment display
between the current pocket location and zero. (The green LED on the back panel of the
Indexer will also blink if the condition occurs). This flashing indicates the load on the Indexer
has exceeded the torque capacity of the Indexer and it is unable to move to the new desired
position. This usually means that an excess amount of material has accumulated on the
source such that it cannot rotate freely.
Section 2.3: Section overview
This section describes the operation of the SRT-422 with a variety of source hearth types. The specific
sections are
Control/Display
Features
Clockwise vs. Counterclockwise Pocket Numbering
Indexer Operation With Standard Multipocket Sources
Indexer Operation with 4-pocket UHV Sources
Indexer Operation With 3-pocket Sources That Have One Banana-Shaped Pocket
Indexer Operation With Continuous-Trough Hearths
Phase Adjustment
Rotation Speed and Torque Selection
Section 2.4: Control/display features
All of the indexer’s control/display features are on the control unit’s front panel, which is
illustrated in Figure below.