Jump to content

740427863_Terminatorchallenge.jpg.2f4cb93182b2ce715fac5aa75b0503c8.jpg

Carbon Fiber Spider


Robert72
 Share

Recommended Posts

The difference between thin and thick vanes is most visible int the way colours are diffracted. Also, thick vanes block more light than thin vanes.

Link to comment
Share on other sites

On 23/06/2021 at 23:30, wimvb said:

The difference between thin and thick vanes is most visible int the way colours are diffracted. Also, thick vanes block more light than thin vanes.

I didn't mean the difference between thin and thick vanes, I meant the gap between the vanes. If I read your previous post correctly the gap between the vanes is the thickness of the thick vane. The gap between vanes on my initial design was 10mm. Does  that even matter? I think someone in a previous post mentioned if the gap is small it has a larger effect.

Regardless, I'm going to have a crack at a single vane design.

  • Like 1
Link to comment
Share on other sites

I'll see if I can dig up the configiration image that Maskulator used to calculate the diffraction patterns. But the thick vanes that I used were considerably thicker than 10 mm, and so was therefore the spacing between the double vanes.

 

Addendum:

I added the configuration images to my earlier post with the diffraction patterns.

Edited by wimvb
Link to comment
Share on other sites

Here is the single vane equivalent, it's basically the same however the central box has been replaced with a 40mm tube. The tube and vanes are semi-slotted and bonded. Not sure about the ends, how important are they in terms of diffraction? If need be they can be integrated into the tube, this would give a very clean light path.

Spider_Single_Vane_1_Ortho.jpg

Link to comment
Share on other sites

On 23/06/2021 at 17:36, Robert72 said:

Maskulator seems like a handy app. The double vane spacing seems quite small though (I don't know if it makes much difference).

I edited my earlier post and inserted the configuation images for the diffraction calculations. As you can see, I exaggerated the thick spider and the distance of the double thin spiders.

Link to comment
Share on other sites

  • 1 month later...

Now let's make a kit of carbon parts....

20210812_131919.thumb.jpg.1fc50b652b02c336e4924eb47cea5256.jpg

I've also made a rudimentary building jig. The outer ring and vanes are held by the adjustable quadrants of MDF. The inner ring is held by the steel dowel. Should be good for holding all the parts in position while bonding.....

20210812_132414.thumb.jpg.cd0536dddfdda0154ab1ee798fb8e65e.jpg

  • Like 4
Link to comment
Share on other sites

  • 2 weeks later...
  • 3 weeks later...

OK, so the sub assemblies are pretty much done....

20210905_125842.thumb.jpg.4bd5c2a2334b437770c27ce2838febb0.jpg

A close up of the spider hub.....

20210905_125849.thumb.jpg.34ed647a06a497e1418ab14e714ea7aa.jpg

The adjuster plate with brass inserts and anodised bolts. I chose red to stand out under red lighting. There is a bigHead female bonded onto the back there to act as a kind of lock nut to resist rotation....

20210905_125917.thumb.jpg.39acffec029186edbfbd9717d3980732.jpg

Side view of adjuster plate and bonded bigHead.......

20210905_125907.thumb.jpg.571d87e1678f60ffd8b166d571ce52a3.jpg

Assembled. Still awaiting compression spring.......

20210905_132037.thumb.jpg.f1e077bb18808199afeba6b45d9dd214.jpg

Internal view of the angle thingy. This is where the spring will go. The bigHead makes an ideal spring rod, but i think i will need a bigger washer......

20210905_132107.thumb.jpg.1355ff8fe0a8dc7bb8fe6a1fb70f9352.jpg

Candle holders make ideal spider stands........

20210905_132538.thumb.jpg.f78606aa54517b250e2e990036302fc5.jpg

  • Like 2
Link to comment
Share on other sites

  • 4 weeks later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.