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Thread: 4x5 diy view camera rack/pinion question

  1. #41

    Re: 4x5 diy view camera rack/pinion question

    Sean,
    Thanks for suggestion on Chamonix camera
    I'll study and test also this solution

    Andrew

    Sent from my SM-T719 using Tapatalk

  2. #42

    Join Date
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    Re: 4x5 diy view camera rack/pinion question

    Don't underestimate plastics. They make gears for lathes out of plastic these days (and even in the '60's). Just separate load bearing sliding function from transport.
    Expert in non-working solutions.

  3. #43
    Jac@stafford.net's Avatar
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    Re: 4x5 diy view camera rack/pinion question

    Just for a break, OP, consider a solution that does not require a rack-and-pinion. Today's materials might help. Considering such a solution is a good mental exercise. Inventors go outside of convention to discover novel approaches.

    I built a wide angle wooden 4x5 camera frame that slid the lens against a vertical slide rather than the base. It locked focus using a large Wing nut. No bellows, no movements which will strike some LF enthusiasts as silly, but it was wide-angle. So be it.

    Just trying to free up pre-conceptions.
    --
    Jac

  4. #44

    Join Date
    May 2016
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    Re: 4x5 diy view camera rack/pinion question

    Quote Originally Posted by Jac@stafford.net View Post
    Just for a break, OP, consider a solution that does not require a rack-and-pinion. ...
    ... No bellows, no movements which will strike some LF enthusiasts as silly, but it was wide-angle. So be it.

    Just trying to free up pre-conceptions.
    --
    Jac
    There you see it, Andrea. Some of us would like you to not only forget about your plastic rack&pinion but also about bellows, movements and focusing altogether on your LF camera.
    By now I think you understand that a lot of the so called advice you will get is just a pure concentrate of, well ... not much sense rumble. Just keep your common sense.

  5. #45

    Re: 4x5 diy view camera rack/pinion question

    Hi all,
    Thanks for all ideas and advices.
    I'm trying to find the best solution also considering the tools for diy

    I'll keep you informed just to show my progresses, always ready to follow yr advices

    Ciao
    Andrew

    Sent from my SM-T719 using Tapatalk

  6. #46

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    Re: 4x5 diy view camera rack/pinion question

    I bought one of these for $8.24 on e*ay. It will do the same thing as a rack/pinion set will and is actually easier to fabricate an item with it that functions well.
    Click image for larger version. 

Name:	T8 lead screw.jpg 
Views:	17 
Size:	32.2 KB 
ID:	177496

    They (T8 lead screw) come in various pitches and lengths.
    Brass is a metal alloy, not a lens type - MichaelE

  7. #47
    Randy Moe's Avatar
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    Re: 4x5 diy view camera rack/pinion question

    Quote Originally Posted by John Earley View Post
    I bought one of these for $8.24 on e*ay. It will do the same thing as a rack/pinion set will and is actually easier to fabricate an item with it that functions well.
    Click image for larger version. 

Name:	T8 lead screw.jpg 
Views:	17 
Size:	32.2 KB 
ID:	177496

    They (T8 lead screw) come in various pitches and lengths.
    Are those as small as they look?

    I never found small ones.

    Would you PM me the eBay site?

    Thanks!

  8. #48

    Re: 4x5 diy view camera rack/pinion question

    Thanks John,
    could also send me the info ?

    Ciao
    Andrew

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  9. #49

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    Re: 4x5 diy view camera rack/pinion question

    https://www.ebay.com/itm/3D-Printer-...6e1f%7Ciid%3A1
    3D Printer T8 1/2/4/8/12/14mm 300mm Lead Screw 8mm Thread With Copper Nut For Stepper Motor (it says copper nut but it's brass)


    Description:
    This T-type screw is a new type of screw is mainly used in stepper motor, machine tool rails and other equipments.
    Feature:
    Diameter: 8mm screw
    Lead distance: 1/2/4/8/12/14mm (lead refers to a circle in a straight line distance) (Optional)
    Material: All stainless steel screw
    Steel length: 300mm
    Quantity: 1pc
    Package includes:
    1 x 300mm Lead
    1 x Screw nut

    Click image for larger version. 

Name:	Lead screw.jpg 
Views:	12 
Size:	92.9 KB 
ID:	177502
    Brass is a metal alloy, not a lens type - MichaelE

  10. #50

    Join Date
    Mar 2014
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    Virginia, USA
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    Re: 4x5 diy view camera rack/pinion question

    Brass is a metal alloy, not a lens type - MichaelE

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