INFICON MPI-16 Crucible Indexer - Manual (Page 36)

MPI-16 & MPI-16H POCKET INDEXERS
4-2 Operation
addition to a Deposition Controller allows the operator to run a program, pause the
program, check the material level of a particular pocket using the manual Pocket Select
knob on the Remote Panel, and resume the program with the Deposition Controller.
If you are using a Remote Panel in conjunction with a Deposition Controller, flip the
switch labeled Auto / Man. to the Auto setting. This allows the Pocket Select and
Speed Select signals from your Deposition Controller or PLC to be sent to the indexer.
When you want to use the Remote Panel, simply switch the Auto / Man. Switch to the
Man. setting.
Although most Deposition Controllers are capable of automatically selecting the speed as
well as the pocket, it is often not necessary to have such control over the speed setting. If
you know that the sweeping speed for Circular and Banana Pockets will not need to be
changed, you can set the Speed Select switch on the indexer itself. If you want to select
various speeds remotely, set the Speed Select switch on the MPI-16 to Remote. Now,
the speed selection will either come from the Deposition Controller (Auto / Man. =
Auto) or the Remote Panel (Auto / Man. = Man.)
4.2.1 Pocket Position Selection
There are two methods of controlling the pocket selection with an external controller, a 4-
bit BCD (Binary Coded Decimal) signal or a directional signal. Each of these methods is
described below.
4.2.1.1 BCD Code Drive
This method involves setting the Pocket Select Inputs to the desired pocket as a 4-bit
BCD signal. See Table 4-1 below for selection truth table. Note that, since it is BCD, if
your crucible has fewer than 16 pockets, you don’t have to use all four-bit inputs. For
example, if you have a 4-pocket crucible, you only need to use Bit 0 and Bit 1.
In this selection mode, as soon as a new value is detected (assuming it is in range), the
MPI-16 immediately begins to move to that pocket. This will be the mode of operation if
the Rotation Mode switch is set to Fast, UHV, CW, or CCW.
Pocket Select Inputs
Bit 3 Bit 2 Bit 1 Bit 0 Pocket Position
0 0 0 0 1
0 0 0 1 2
0 0 1 0 3
0 0 1 1 4
0 1 0 0 5
0 1 0 1 6
0 1 1 0 7
0 1 1 1 8
1 0 0 0 9
1 0 0 1 10
1 0 1 0 11