4x5 diy view camera rack/pinion question

[Andreafotosg]

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

Andrew

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[Havoc]

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.

[Jac@stafford.net]

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

[Pfsor]

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.

[Andreafotosg]

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

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[John Earley]

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.


They (T8 lead screw) come in various pitches and lengths.

[Tin Can]

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.


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!

[Andreafotosg]

Thanks John,
could also send me the info ?

Ciao
Andrew

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[John Earley]

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

[John Earley]

6mm T6 lead screws
https://www.ebay.com/itm/T6-x-1-to-T...OLrFQxxOVMf4DQ