Instrument Control System

1
Instrument Control System
2
Outline

• Overview
• Differences with NIRI Control System
• Issues / Problems

3
Motor Control Subsystem
4
Motor Control Subsystem

• New SSBs
• 3 SSBs (4 in NIRI)
• New Phytron BP
• 8 Motors (14 in NIRI)
• Subset of NIRI Wiring

5
Motor Controlled Mechanisms
6
Environmental Cover

• Non cryogenic stepper motor
• Limit switch position detection

7
OIWFS

• NIRI Duplicate
• Geared linear gimbal drives
• Coarse Fine Hall Sensors
• Geneva Filter wheel drive
• Hall sensor position detection

8
NIFS Components

• Clutch drive gear set on
• Focal plane mask wheel
• Grating Turret
• Filter wheel
• Coarse fine Hall sensors
• Limit switch position detection on Flip Mirror

9
Thermal Control Subsystem
10
Thermal Control Subsystem

• 2 Omega CYC321
• Lake Shore 340 moved to DC Encl.
• Backup module for cryopump stepper motors

11
Cassegrain Connector Panel Interconnections
12
Thermal Enclosure Interconnections

• Data LAN merged with Control LAN
• 100baseT between CC and DC
• Lake Shore moved to DC Cabinet
• Cisco Catalyst 2900 Switch

13
PCB Assemblies
14
Sensor Support Board

• Full surface mount design
• 13 Hall effect sensor amps per board
• Four home signal channels
• Thermistor support deleted
• Cross-point switches allow daisy chained cabling
  and easy configuration
• Reduced power requirements

15
Crosspoint Switch
Connector
To XVME 566 A/D Card
Hall Effect Sensor Amplifiers (13)
Crosspoint Switch
Crosspoint Switch
Connector
Home Signal Comparators (4)
To Phytron Backplane
16
Phytron Backplane

• Revised home signal connectors
• Deleted connectors

17
Issues / Problems

• Mechanism encoding method
• SSB / Phytron Backplane design cycle
• Part of contract amendment