iSHELL INSTRUMENT CONTROLLER OVERVIEW Tony Denault Software - - PowerPoint PPT Presentation

• Tony Denault – Software Programmer
• Eric Warmiber – Electronic Engineer

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iSHELL INSTRUMENT CONTROLLER OVERVIEW

iSHELL has 3 control systems.

• Spectrograph Camera System – Computer, Controller, and electronics used

to readout the H2RG Array.

• Guider Camera System – Computer, Controller, and electronic used to

readout the Aladdin Array.

• Instrument Controller System – Computer, controllers, and electronics to do:

– Motor control – Temperature control and monitoring – A/C power control. – Other hardware control.

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What is the iSHELL Instrument Controller?

On page 4 of the Instrument Controller Overview, a table lists the items to be

• controller. Below is summary of these items.
• 12 Mechanisms using stepper motors. 3 are warm located in the calbox,

and 9 are cold located inside the dewar.

• Sensing for ~23 position sensors or switches. A combination of analog and

digital channels.

• 5 Temperature Control loop: H2RG, Aladdin, Grating #1, Grating #2, and the

Gas Cell.

• 10 Channels of temperature monitoring.
• Power control for 3 calibration lamps.

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What is controlled by the iSHELL Instrument Controller?

Our plan for the iSHELL Instrument Controller is to copy of the SpeX Instrument Controller. SpeX is currently being upgraded. Its instrument controller is being replaced. SpeX has:

• 6 stepper motor (warm).
• 2 servo motors (warm)
• 4 A/C power outlets (Lamps)
• 2 temperature controllers (H2RG, Aladdin).
• 10 channels of temperature monitoring.
• 8 channels of analog input.

The SpeX Instrument controller is being built and written so that it can be replicated for iSHELL. This provides iSHELL with a proven design that can be implemented very quickly.

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The iSHELL Instrument Controller

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The iSHELL Control System Block Diagram

Serial Port Server Digiport TS 16 Calibration Lamps Lamp1 Lamp2 Lamp3 Utility Box Comparator board H2RG ARC Controller Spectrograph PC in computer room Guider PC in computer room Ethernet IO unit RIO-47120-16bit

iSHELL Data Acquisition and Instrument Control Block Diagram

IRTF KVM IRTF LAN IRTF KVM IRTF LAN IRTF LAN

CASS Computer Room

Temperature Control H2RG Array, Alladin Array, Immersion Grating #1, Immersion Grating #2, Gas Cell + 8 Dewar Temps Sensors

In cool racks

Stepper Motor Controller. DMC-4183 2 each, 8 axis controllers Notes: Instrument Controlerl Computer IRTF KVM IRTF LAN Stepper motor drivers (phytron or

• thers)

9 Cold Motors Rotator Wheel Slit Wheel Slit Decker Guider Filter Wheel Order Sorter Wheel Grating Selector (in/out) XD Wheel XD tilt (slider) H2RG Focus (slider) Analog and Digital IO iSHELL Instrument Instrument Control System IRTF Infrastructure PC Parallel Port (timestamps shutter) PC parallel port (timestamps shutter) AC power cntl WTI NPS-8 Aladdin ARC Controller Controller power supplies (2 each – Agilent N6700B ) Fiber to TTL ARC PCIe Fiber interface TTL to fiber Fibers from TCS Rm to CASS ARC PCIe Fiber interface TTL to fiber Fiber to TTL 3 Warm Motors Gas Cell (in/out) CalMirror (in/out) Window cover (in/out) Temperature Controllers

2 Lakeshore 335 (Arrays) 1 Lakeshore 218 (monitor) 2 Grating Controllers TBD

Array Controller GPIB to Ethernet

iSHELL Control System diagram on page 6. Color coding:

• Orange = iSHELL
• Purple = H2RG and Aladdin Camera

Systems

• Blue = Instrument Controller

Instrument Controller PC in the computer room. Hardware controllers are located in the coolrack electronic box at the telescope. All cool rack controllers are access using Ethernet. All hardware has be used at the IRTF or is being used in the SpeX upgrade.

Galil DMC-4183 Motor Controller

• 8 axis motor controller
• 8 analog inputs
• 16 digital input
• 16 digital outputs
• Ethernet interface.

IM483-24PI micro stepping motor driver.

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iSHELL Instrument Controller Hardware 1

DMC 4183 IM483 driver

Warm phytron motor IMS stepper motor

Hall Effect Sensor Conditioning Hardware

• The current SpeX comparator board is
• shown. In-house design.
• We plan to use an updated version of the

this board for the SpeX upgrade, and iSHELL.

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iSHELL Instrument Controller Hardware 2

For Additional Analog or Digital IO Galil RIO-47120-16bits

• 8 analog inputs
• 8 analog outputs
• 16 digital inputs
• 16 digital outputs
• Ethernet port
• Used by the IRTF TCS.

Lake Shore 335 Temperature Controller

• Newer version of the 330 (SpeX), 332

(NSFCAM) used by the IRTF.

• Ethernet interface provide by a Prologix

GPIB-Ethernet device.

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iSHELL Instrument Controller Hardware 3

Lake Shore218 Temperature monitor

• Newer version of the 208 used by SpeX.
• Interface is RS-232

Digi PortServer

• RS-232 to Ethernet
• IRTF uses various model of the PortServer..

Instrument Controller Computers

• Standard PC
• Linux OS
• Being used to develop the SpeX

Instrument Controller Software.

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iSHELL Instrument Controller Hardware 4

WTI NPS-8

• 8 outlets of A/C power control over

Ethernet.

• To be used for Calibration Lamps.