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Graham

Test rig. The build.

45 posts in this topic

Just doing a belt mod on an NEQ 6 then I will get on with finishing the Whiffle trees.

 

 

Edited by Graham
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It's really taking shape Graham. And will come in handy again and again no doubt 👍

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2 hours ago, Smithysteve said:

It's really taking shape Graham. And will come in handy again and again no doubt 👍

 

Thanks Steve 

That is what I am hoping.

It is the reason why I am mounting the focuser and the secondary on adjustable mounts.

Gave it a treat this afternoon and painted it with a good coat of Black Hammerite. :)

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Gave it a lick of paint this afternoon to tidy it up a bit.

 

Test Rig 9.jpg

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Just as soon as I can get Tim back into the country to fly it  :lol:

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It is really looking great Graham good engineering to last a life time

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Managed to make the spider, the adjustable secondary support tube and the focuser mounting plate yesterday.

After I got home I just had time to get the spider fitted last night.

Will post up some pics as and when.

Today if I get a spare couple of minuets I will turn up the adapter to allow me to use my duel speed focuser on the rig.

After that it is just a matter of turning up the Delrin Whiffle tree rollers and the safety stops and I am ready to go.

 

Edited by Graham

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You have come a long way with this project Graham. 👍

You have built a solid test rig to enable you determine a true diagnosis of the optical system.👌

i wish you good luck with the checks and just hope the clouds part long enough to allow you a chance to do proper star/lunar tests! 🌟🌛✨

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Thanks Steve. 

Parting clouds :) I am happy to go outside and find the test rig has not sunk :lol:

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Looking forward to seeing the spider pics and other bits. Great progress Graham. :thumbsup:

 

Are the 18 pads for the mirror also in delrin?

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1 hour ago, Tweedledee said:

Looking forward to seeing the spider pics and other bits. Great progress Graham. :thumbsup:

 

Are the 18 pads for the mirror also in delrin?

 

The pads are a high density rubber type material. 

We use them at work for impact absorption on the cutting Dec's. 

Very similar to delrin with the added benefit of vibration killing properties. 

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1 hour ago, Graham said:

 I am happy to go outside and find the test rig has not sunk :lol:

 

If it carries on like this I am fitting flotation bags on mine and getting some paddles. The cat's getting webbed feet.

 

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Managed to do a test fit of the adjustable Focuser plate and Secondary mirror holder tonight.

 

Plate and mirror in place.

 

Focuser and secondary 1.jpg

 

Looking through the Focuser.

 

Focuser and secondary 2.jpg

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Love the idea of the adjustable focuser and secondary mirror, I was going to make my upper OTA move up and down along the truss tubes to achieve the perfect focal length but like your idea better.

Edited by Doc
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Thanks Mick.

This will only be used on the test rig.

Once the mirror is finished I can get an exact measurement off the test rig for the fixed position in the scope.

Well thats the theory :facepalm: :)

Had a go at collimating the rig last night which was quite successful but I am going to make one change and that is to put the plate on the inside of the frame to shorten the exit distance a bit.

Edited by Graham

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Focuser plate now all sorted.

Adjustment is as simple as slacken off the hand wheels and slide into position.

 

Focuser Plate.jpg

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