29 Nov. 2019
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Revision as of 15:17, 29 November 2019 by Stuart (Talk | contribs) (Created page with "1st of fortnightly meetings <big>Attendees</big> - Nic Erasmus, James O'Connor, Egan Loubser, Ali Ranjbar, Chris Mottram, Stuart Bates <big>Mechanical</big> * We now have a...")
1st of fortnightly meetings
Attendees - Nic Erasmus, James O'Connor, Egan Loubser, Ali Ranjbar, Chris Mottram, Stuart Bates
Mechanical
- We now have a Zemax file from Iain, this model makes the instrument a little more compact, (model sent to James).
- Iain has requested the filters in the filter slides be increased to 35mm clear aperture (from their current 30mm)
- From James, this increase would require either longer translation stages to position each filter slide or a reduction in the number of filters from 3x4 (5 position filter slides with one clear position in each), to 3x3.
- Ali is looking to reduce the length of the grism assembly further (currently 40mm)
- Ali has suggested a stepper motor be used to rotate the grism assembly to optimise for red and blue, looking into feasibility
- James has requested LJMU start looking at their requirements for the instrument interface
- We will be using compressed air for slit, calibration mirror and grism assembly deployment
Control
- James will speak with electronic control people at his end regarding controlling filter slides, stepper motor and solenoids
- Chris Mottram looking at options to control stepper and filter slides
- SAAO mentioned dissapointing results using Ardunio's in the past
- Nic and Chris discussing software layers, which controls what
- We should create a diagram showing all control and power items, and their relationships with each other
Optics
- Iain raised concerns regarding substrate materials if we are to use use this instrument to observe further blue than 400nm
Organisation
- It was agreed we need to put a schedule together to co-ordinate effort appropriately
Action Items/ Decisions Req'd
- Increasing the filter clear aperture - is this a no-go from a science perspective (reducing filters or longer filter actuators)? - Science team
- Reduce length of Grsim assembly further - Ali
- Purchase and test stepper motor - LJMU
- Produce model of required instrument interface - LJMU
- Decide how will actuators be controlled - Chris/Nic
- Create diagram showing all power, control and motion requirements and relationships - LJMU
- Create initial schedule - LJMU
Date of next meeting - Friday 13/12/2019
