How to create a bit of tension between two wooden rollers?

A tricky thing to explain. My son has asked me if I can make for him a wooden frame incorporating 2 rollers so that a 30M x 20CM roll of paper can be scrolled through. Big lump of paper. I can do the woodwork and any turning required but I can't figure out how to tension the paper between the rollers. Something like the roller-map used by Stirling Moss & Denis Jenkinson in

1955.
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Although on a somewhat larger scale. The idea is that he can write an A4 (ish) page per day.

Any thoughts please Nick

Reply to
Nick
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Something like this, mounting the roller where the wheel is and having a spring incorporated into it to create tension. It may give you some ideas.

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Reply to
ss

Thank you ss, food for thought. I may be able to adapt some bits that I have to do the job along these lines, Nick

Reply to
Nick

Does the frame have a solid back plane? i.e. top-down: O____O

Wouldn't (just) turning the rollers in opposite directions provide the tension?

A string, or elastic, or flat strip against the plane - so the paper passes through it after the roller, i.e. O=___=O (iyswim) would provide enough tension to be writeable, maybe.

Alternately, and apologies for tek'ing up, assuming a similar purpose to the Stirling Moss article, wouldn't a tablet app be more useful.

Reply to
WeeBob

This class of problem was solved in tape recorders years ago. Suggest you get an old one and cannibalise it.

Essentially the speed is tightly controlled by the pinch wheel/capstan and the spools themselves are overdriven and underdriven with slipping clutches of some sort.

Suggests cork pads and a soft spring to tension them?

A laser printer would give you the capstan and pinch wheel parts.

Reply to
The Natural Philosopher

In message , Nick writes

Tape drive mechanics have been mentioned elsewhere in this thread, but I have a distant memory of something that relates to twin capstans driven by a single belt, that produce tension as a result of the belt characteristics.

Ah, something like Figure 9.29, page 330, here:

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Reply to
A_lurker

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