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It works, but not yet cleanly and reproducibly. Some serious weaknesses have emerged that require a rethink. Apart from the very surprising partial unsuitability of PETG for small parts (things keep breaking off), there are problems with the current position of the stepper motors. These are too close to the chemicals. They still work, but failure due to corrosion damage is inevitable. I am currently prioritizing my other project, a film processor (
https://www.photrio.com/forum/threa...-and-step-processor-half-eurobox-size.216552/). I have received many requests from Reddit users to bring this to market. Since the film processor is actually a more complex project in terms of control but more manageable in terms of mechanics and has no problems with contact with chemicals, I am focusing on this. After that, I will return to the RA4 processor for publication or possibly (in parallel) in the form of a kit. However, the kit version will probably no longer be the 1:1 Printo design, but rather something with similar mechanics but closer to an RCP design. To avoid the problem of direct heating, I would use a temperature-controlled bath with a sous-vide heater and a fixed 2-bath mechanism with an intermediate bath and a 60x40cm Eorobox as a container. I will then publish the Printo clone files online regardless of whether I make a different version. But I will definitely have to position the motors differently and print the small parts from PP filament. I also have to check with the film processor to see what problems putting it on the market might entail. It's not entirely without its challenges.
I just bought the plans for the Cameradactyl Prosesor yesterday, but I was a little fast on the trigger and I had misstaken it to be able to do 8X10 paper