Thread: Etch Press Build
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18-05-2018 #1
Having just read a bit more on the topic, the drive roller would be fine in 7075T6 with the idler in mild steel - had stainless in mind as it's what (little) I remember from the college art room... The crucial bit is that the rollers run absolutely parallel to each other (this can be tweaked via the take-up bearings) and that the running gear can withstand high pressures.
I may well have to consider increasing the shaft diameter to a more substantial 20mm and have a closer look at using self-aligning bearings to accommodate said tweakage... This could get a bit pricey...
Wal.
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18-05-2018 #2
Hi Wal,
This build uses tube for the rollers
https://www.youtube.com/watch?v=UhlSZU63S7g
and these for the pressure adjustment
http://www.arceurotrade.co.uk/Catalo.../Take-up-Units
Interesting project, but not for me (too many projects stalled on the bench )
Cheers, Rob
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18-05-2018 #3
Cheers Rob - that clip makes it look too easy..!
Wal.
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18-05-2018 #4
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18-05-2018 #5
If you could find an old number plate machine you'd have no work to do, they're effectively a heavy duty mangle with geared steel rollers.
You think that's too expensive? You're not a Model Engineer are you? :D
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18-05-2018 #6
Or indeed a (somewhat modified) beeswax foundation roller:
https://www.amazon.com/Beeswax-Found.../dp/B01LZE05HU
(Chances are my grandad had one of these - long gone now..)
Unfortunately none of this hardware's cheap - hence the DIY approach. Still won't be cheap, but it'll keep me occupied..!
If you made a cock-up, would you edit it out of the video - Just asking
Wal.
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