Another Durst RCP-20 question

aca · Dec 4, 2020

I got a second Durst rcp-20, but this machine has bad pickup rolls.
I have tested the run with some plain water and the pickup rolls are not doing their job correctly. I need to "help" the photo paper quite a lot and the chance exists the paper is not straight. I also notice a bit of water on bottom of the machine and I have removed the bottom plate and I think one of the hose clamp closures needs to be tightened or replaced (but that should be doable).

Also one of the rolls from the stop bath is ripped

Any ideas where I can get new pickup rolls and this one for the stopbath?
and any tips on how to replace them??

After the pickup rolls, everything seems to be running fine.

Rudeofus · Dec 7, 2020

An inquiry to their service may help, but I am not sure whether they still have spare parts for these machines. Your best chance is getting a cheap, used processor of the same type, maybe even one labeled "defective" for spare parts.

aca · Jan 6, 2021

@Rudeofus sorry, little late but thanks for your reply. I will check if I can find one for cheap.

1kgcoffee · Jan 10, 2021

Unfortunately you might have to rig up something if you can't find the parts. But it is well worth it for this wonderful machine. I don't know what you could use, but perhaps you could wrap some sort of sheet rubber or wide elastic bands around it to give it more grip? Many wide/small bands might do the trick.

Light Capture · Jan 10, 2021

You can try with heat shrink tubing first and see if it works.
It's easy to apply and easy to remove if it doesn't work.

aca · Jan 11, 2021

1kgcoffee said:
Unfortunately you might have to rig up something if you can't find the parts. But it is well worth it for this wonderful machine. I don't know what you could use, but perhaps you could wrap some sort of sheet rubber or wide elastic bands around it to give it more grip? Many wide/small bands might do the trick.

Light Capture said:
You can try with heat shrink tubing first and see if it works.
It's easy to apply and easy to remove if it doesn't work.

Thanks, I will try / check both of your suggestions.
"heat shrink tubing" sounds interesting I need to Google it and see what it is. And also check if it's available locally in the Netherlands.

Has anyone of you disassemble the rollers? Any pitfalls I need to know of?

I am asking as it won't be my first time I disassembled something and can't assemble it again

1kgcoffee · Jan 11, 2021

Never done that. My advice would be to video record the process in case you lose track. Let us know how it goes please I think this is a common issue

koraks · Jan 12, 2021

aca said:
"heat shrink tubing" sounds interesting I need to Google it and see what it is. And also check if it's available locally in the Netherlands.

It's used extensively in electronics and is readily available through a wide range of sellers. Some examples are reichelt.nl and conrad.nl, but you may also have luck (at even friendlier prices) at Baco Army Goods (google it; they have a web shop but not everything they sell is on it in my experience, but the physical store in Ijmuiden is likely closed now). Of course there's always aliexpress with even lower prices but you'll have to wait longer for it to arrive.

The stuff comes in a wide range of diameters, but there are kits with several diameters so you can try. Most of it is probably too small for your purpose, but the larger diameters may work.

I'm not sure if it's sufficiently chemical resistant and how long it will last,but it's an interesting option to try, it's easily reversible and doesn't cost an arm and a leg.

Light Capture · Jan 12, 2021

aca said:
Thanks, I will try / check both of your suggestions.
"heat shrink tubing" sounds interesting I need to Google it and see what it is. And also check if it's available locally in the Netherlands.

Has anyone of you disassemble the rollers? Any pitfalls I need to know of?

I am asking as it won't be my first time I disassembled something and can't assemble it again

Try this: http://www.rotor.eu/
They have 1.2 meter long pieces. Shipping or pickup on appointment from what I can see.
Amazon should have some as well.

Dutch translation for heat shrink tubing seems to be krimpkous.
They have long pieces. That's what you need to try.
I used RCP-20 long time ago and never took it apart. Had no reason to do it.
RCP-20 and Printo rollers seem to pick up dirt after some time. Filling with water and some paper through usually cleans it.
Shouldn't be run dry.

Stop bath roller might not impact anything.

As with any other disassembly of unknown stuff, take a lot of pictures before you start and during process. Should give you lots of information to re-assemble it correctly.

tijn · Mar 11, 2021

For the pickup rolls I'd suggest applying samson, the adhesive rubber sheet; the stuff we fix flat bicycle-tires with.
In mine the foamroller (stopbath) has crumbled and is gone. I can either forgo the stopbath (wich I don't like to) or I'll try to fix a 20 cm paint-foamroller into it. I should be able to cut an extended foamroller-handle into the suitable length and use it as the axle.
Or is there an easier way to fix this?

Another Durst RCP-20 question

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