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Entry  Thu Jun 21 14:23:22 2018, Udit Khandelwal, Summary, General, A summary of the Tip-TIlt Mirror Holder design changes 1.png2.png3-1.png3-2.png3-3.png
    Reply  Thu Jun 21 14:57:59 2018, Koji, Summary, General, A summary of the Tip-TIlt Mirror Holder design changes 
       Reply  Mon Jun 25 19:14:02 2018, Udit, Summary, General, Re: A summary of the Tip-TIlt Mirror Holder design changes 4-1.png4-2.png
          Reply  Mon Jun 25 21:14:08 2018, Koji, Summary, General, Re: A summary of the Tip-TIlt Mirror Holder design changes 
Message ID: 14014     Entry time: Mon Jun 25 19:14:02 2018     In reply to: 13997     Reply to this: 14015
Author: Udit 
Type: Summary 
Category: General 
Subject: Re: A summary of the Tip-TIlt Mirror Holder design changes 

2. Weighted screw rod at the bottom for tilting the mirror-holder:

The screw length selected here (2") is not interfering with any part of the assembly.

The 'weights' I have here are just thumb nuts from Mcmaster, so their weight is fixed (1.65g each, btw).

Problem I'd like to solve: Find an assortment of weighted, symmetric nuts with caps on one end to fix position on shaft. 

3. Set-screws on both side of wire clamp to adjust its horizontal position:

Thanks for pointing out the mismatch in travel distance of protrusion and clamp screws. To match them, the clamp screw slot now sticks out of the profile (by 1.5mm). The range of the clamp motion is +/- 3 mm.

Also, here's a screenshot of the slot in the mirror holder:

--

- Excluding the weighted screw rod assembly, the height gap between assembly COM and wire release point is 3.1 mm.

Quote:

> 2. Weighted screw rod at the bottom for tilting the mirror-holder:

Too long. The design of the holder should be check with the entire assembly.
We should be able to make it compact if we heavier weights.
How are these weights fixed on the shaft?
Also can we have options for smaller weights for the case we don't need such a range?
Note the mass of the weights.

> 3. Set-screws on both side of wire clamp to adjust its horizontal position:

How much is the range of the clamp motion limited by the slot for the side screws and the slot for the protrusion? Are they matched?
Can you show us the design of the slot made on the mirror holder?

>>

Where is the center of mass (CoM) for the entire mirror holder assy and how much is the height gap between the CoM and the wire release points. Can you do this with 3/8" and 1/2" fused silica mirrors?

 

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