Optics-In-Motion OIMC100 User manual

Analog Controller
User’s Manual
Analog Fast Steering Mirror Controller
Model OIMC100
May 29, 2015
Revision A

Product Warranty
Optics-In-Motion LLC warrants this product to be free from defects in material
and workmanship for a period of 1 year from the date of shipment. If the
product is found to be defective during the warranty period, the product will
either be repaired or replaced at Optics-In-Motion’s option.
This warranty does not apply to defects resulting from modifications or misuse
of any product or part.
Optics-In-Motion LLC shall not be held liable for any indirect, special, or
consequential damages caused by the use of the product.

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Table of Contents
Page
Product Warranty ..........................................................................2
Table of Contents..........................................................................3
Mirror Controller: ..........................................................................4
Figure 1: Adjustable PID.............................................................4
Mirror Power Supply: ...................................................................5
Figure 2: Controller Rear View .....................................................5
Figure 3: Block diagram for X-axis control .......................................7
Figure 4: BNC to 25 PIN D Adapter PINOUT.......................................7

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Mirror Controller:
The mirror controller electronics are housed in a remote enclosure connected
to the FSM via a 6 foot cable. Mirror commands are input to the controller
through a 25 socket D sub-miniature connector. The commands are differential
signals representing the x and y mirror positions, scaled to the +/- 10 volt
range. For example, the X- command can be grounded and the X+ command
can go from +10volts to -10volts. The input impedance of the command signals
is 10K ohms. Monitor signals are provided for the actual mirror positions, error
signals (feedback error between commanded position and actual position). The
PID gain of the controller may be set from the controller front panel
potentiometers (See fig. 1)
Figure 1: Adjustable PID
The mirror bandwidth and step response are factory tuned, the data sheets
included with the unit show the current settings. The user can optimize the
tuning for their specific application by changing these settings. The PID
adjustment potentiometers are located inside the controller, to access these
pots the front 4 cover screws must be removed. The photo in figure 1 shows
the front panel slid forward to allow access to the proportional (P), integral (I),

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and derivative (D) gain potentiometers (CCW to increase gain on these pots).
The controller card is attached to another card via a ribbon cable which is
hidden inside the controller box. The mirror can be driven while this card is
pulled forward, allowing the user to optimize the PID values for a given step
requirement while monitoring the position and error signals on a scope. Also
shown in the figure is our 25 pin D to BNC adapter that can be used for non
OEM operation.
Mirror Power Supply:
The controller is powered by an external +/-15 volt power supply capable of 1.5
amps of current. The external power supply is an air cooled tabletop supply
which plug directly into a 110 or 220 volt wall socket.
Figure 2: Controller Rear View
TO MIRROR HEAD
POWER
CONNECTOR
POWER

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Command Connector Wiring Table
25-Socket Sub-miniature D Connector
Pin
Number
Signal Name
I/O
Type
Description
1
X ERROR
Output
X summing junction error voltage output,
difference between commanded and actual
position. (referenced to ground)
2
INT/EXT SWITCH
Input
Normally low TTL input. High level switches the
position feedback input from local to external.
(used with input pins 10,11 and 17, 5)
3
X- COMMAND
Input
X mirror position command. Low side of
differential command input. Range +/-10 Volts.
4
X+ COMMAND
Input
X mirror position command. High side of
differential command input. Range +/-10 Volts.
5
X- EXTERNAL
Input
X external mirror position. Low side of differential
position input (from external quad or similar
position sensor)
6
GND
Output
Ground Reference
7
-15 VOLTS
Output
-15 VDC for external loads of less than 100ma.
8
No Connection
9
Y DISABLE
N/A
Ground this pin to disable Y axis of FSM
10
Y+ EXTERNAL
Input
Y external mirror position. High side of
differential position input (from external quad or
similar position sensor)
11
Y- EXTERNAL
Input
Y external mirror position. Low side of differential
position input (from external quad or similar
position sensor)
12
Y- COMMAND
Input
Y mirror position command. Low side of
differential command input. Range +/-10 Volts.
13
Y+ COMMAND
Input
Y mirror position command. High side of
differential command input. Range +/-10 Volts.
14
X POSITION
Output
X mirror angular position readout from local
position sensor. (referenced to ground)
15
+5 VOLTS
Output
5 VDC for external loads of less than 100ma.
16
GND
Output
Ground Reference
17
X+ EXTERNAL
Input
X external mirror position Low side of differential
position input (from external quad or similar
position sensor)
18
X DISABLE
N/A
Ground this pin to disable the X axis of FSM
19
+15 VOLTS
Output
+15 VDC for external loads of less than 100ma.
20
GND
Output
Ground Reference
21
SUM SIGNAL
Output
PSD sum signal level (nom 7.5v)
22
GND
Output
Ground Reference
23
Y POSITION
Output
Y mirror angular position readout from local
position sensor. (referenced to ground)
24
Y ERROR
Output
Y summing junction error voltage output,
difference between commanded and actual
position. (referenced to ground)
25
No Connection

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Figure 3: Block diagram for X-axis control
Figure 4: BNC to 25 PIN D Adapter PINOUT
SERVO
CONTROLLER
X COMMAND
X POSITION (EXT)
INT/EXT
SWITCH
Mirror
Head
COIL
DRIVE
X POSITION (LOCAL)
X POSITION OUTPUT
-
+