Another scratchbuilt rangefinder

  1. #1
    mandalore697's Avatar
    Member Since
    Dec 2004
    From
    London, UK
    Posts
    956

    Another scratchbuilt rangefinder

    Hi everyone,

    I've been working on this for sometime now and have only just made some serious progress. I used the tutorial SS made and the templates that Wizardoflight made as a guide, but I have tinkered with the sizing a little.

    The casing is made from 1mm thick sheet PVC, and the "clear" part is made from cast acrylic. This was the hardest part to make as my current workshop is a little on the rubbish side until I can find somewhere to house all my tools etc. I used a hack saw, mitre saw, dremel disc cutter and bench grinder to get it to where it is now. This is difficult stuff to get through so I am going to attempt to invest in a table top band saw. A company called Proxxon do some at an amazing price.

    After cutting the block, I built the RF housing around it, and used liquid poly as it leaves minimal residue and fuses the plastic together. On the rear of the acrylic block I glued some "catches" so that it locks into the housing, but can be easily removed as I would like to add a lighting system.

    I'm planning on eventually making a run of these to go on my website, seeeing as I bought enough acrylic to make about 20 of these!

    I am planning on sanding the block down by hand to achieve a smooth and clear finish. I also need to work on the small window attachment as well.

    Let me know what you think.

    Cheers

    Dan
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  2. #2
    Ronin677's Avatar
    Member Since
    Oct 2005
    From
    Norwich UK
    Posts
    1,903

    Re: Another scratchbuilt rangefinder

    looking good Dan

    boy that acrylic looks a real pain.

  3. #3
    terminal fettler's Avatar
    Member Since
    Jan 2006
    From
    UK
    Posts
    785

    Re: Another scratchbuilt rangefinder

    Looks good to me! Have you tried wet flating the acrylic?this will give you a machine sharp finish...

  4. #4
    stonerook's Avatar
    Member Since
    Feb 2006
    Posts
    240

    Re: Another scratchbuilt rangefinder

    terminal fettler said: View Post
    Looks good to me! Have you tried wet flating the acrylic?this will give you a machine sharp finish...

    You could use this product:
    http://www.modernplastics.com/novisplasticpolish.html


    When I made my clear rangefinder parts, I machined them on a CnC machine, which allowed for crystal clear cuts.

    But a little polishing makes them stand out.

  5. #5
    mandalore697's Avatar
    Member Since
    Dec 2004
    From
    London, UK
    Posts
    956

    Re: Another scratchbuilt rangefinder

    stonerook said: View Post
    You could use this product:
    http://www.modernplastics.com/novisplasticpolish.html


    When I made my clear rangefinder parts, I machined them on a CnC machine, which allowed for crystal clear cuts.

    But a little polishing makes them stand out.

    I'll have to give that stuff a try. Thanks for the tip! Unfortunately I don't have access to top notch equipment, so I have to improvise quite often, at least until I can get the necessary space and tools. I think for my first attempt at cutting acrylic it has turned out pretty well!

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