Canada France Hawaii Telescope

Intern: Kyle MauriColorado State University

Mentor: Greg Green

Background Information

• Two Axes of Rotation

• Hour Angle (HA)

• Declination (Dec)

• Binding of the Current Pin Assembly

• Mirror Aluminizing

• Mirror Handling Cart Alignment

Mirror Cart Rails

Mirror Cell

The East Side tube

The Inner Hub assembly

Planning and Execution

• 1: Understand Drawings and Existing Hardware

• 2: Fully Define the problem and engineer a solution

• 3: Creating New Park Number to align handling cart and mirror cell

• 4: Designing a viable solution

• 5: Machining and Fabrication

• 6: Assembly

1: Understanding The Past

• Vellum Drawings

• Converting Drawings from the 1970’s

• Learning Technical French

• Solidworks Modeling

• Determining Mass Properties

• Understanding Clearance and maximizing available space

• Stress analysis

Current Hardware

Pin Guide Block Pin Receiving

Block

Pin

Sensors

Air Cylinder

Mounting Bracket

2: The Objective(s)

• Realign the Telescope via Dec Pin assembly

• Stop the Dec. Pin from Binding in the Receiving Block

• Tighten Up tolerances

• Be able to Sense Remotely if Pin is Engaged or Not

• Convert to Digital Sensing Equipment

• Match Theoretical Models to Physical Hardware

• Make sure the theoretical is really there

Constraining Factors

• Time

• Installation Time Limited to one working day

• Design, Build/Fabricate, Assembly

• Materials

• Cost, Shipping Time, Availability all need to be considered

• Integration

• Must mount in existing hole patterns

• Needs to be able to use old sensing technology

• Ability

• If it can’t be bought what can we make and how long will it take

3: The New Park Number20:00:38.6 19:45:32.5

4: The New Design

The New Hardware

• New Air Cylinder

• Increased bore size by 25%

• Magnetic sensor ready

• Flow control

• New Mounting Bracket

• More Robust

• Magnetic Reed Switches

• Custom Mounts

• Easy to Run Diagnostics

• New Pin

• Different Internal thread

5: The New (Physical) Hardware

Modifications

6: The Finished Product

Planning and Execution

1: Understand Drawings and Existing Hardware

2: Fully Define the problem and engineer a solution

3: Create New Park Number to align handling cart and mirror cell

4: Design a viable solution

5: Machine and Fabricate

6: Assemble

• Canada France Hawaii Telescope

• Greg Green

• Mary Beth Laychak

• Nicole Tabac

• Akamai Workforce Initiative

• W.M. Keck Observatory

• Justin Pitts

• Cheyenne Maio-Silva

• Katelyn Chigami