INFICON MPI-16 Crucible Indexer - Manual (Page 38)

MPI-16 & MPI-16H POCKET INDEXERS
4-4 Operation
Table 4-2 Pocket Position Feedback Outputs Truth Table
4.2.3 Remote Selection of Rotation Modes
The Rotation Mode Configuration Switch determines the type of command it waits for.
Upon reset (unless Circular Mode was set), the MPI-16 finds Home (locates the first
pocket). After Home is found, the Pocket Indexer awaits a pocket selection command
from the Deposition Controller.
As mentioned ealier, if Rotation Mode is set to Fast, UHV, CW, or CCW, the MPI-16
awaits a 4-bit BCD signal to select the next pocket. If Rotation Mode is set to Remote,
the MPI-16 awaits a CW or CCW “Directional Drive” signal.
4.2.4 Speed Select
NOTE: MPI-16 Speed Select only controls the rotating speed in Circular and Banana
Pocket Modes. MPI-16H Speed Select controls the rotating speed of all modes:
Seeking home, Circular and Banana Pocket Modes.
The available Speed Select settings are shown in Table 4-3 below along with input
selections.
Speed Select Inputs
Bit 2 Bit 1 Bit 0 Speed at Motor Shaft (RPM)
1 1 1 16
1 1 0 8
1 0 1 4
1 0 0 2
0 1 1 1
0 1 0 1/2
0 0 1 1/4
0 0 0 1/8
Table 4-3 Speed Select BCD Inputs Truth Table
You may set or control the Speed Select setting a number of different ways:
• If your indexer is an MPI-16 and your crucible does not contain any Circular or
Banana Pockets, you don’t need to worry about the setting at all. However, if it is
an MPI-16H, you need to select a speed that fits for your application as this speed
also dictates the home seek speed.
• If you are certain that you will not need to change the Speed Select setting
frequently, you should set the Speed Select switch located on the MPI-16 itself.
• If you will need to manually change the sweeping speed frequently, you will need
to connect the MPI-16 to the Remote Panel. You must first set the Speed Select