Using a Jobo 1520 tank with the 1509 roller base

logan2z · Jul 4, 2022

I picked up a 1509 roller base a few months ago but haven't got around to trying it yet. It's obviously a very simple device, but I did have a question about using it with the 1520 tank:

Should the wheels be adjusted so that the tank sits as shown in the photo below? This seems to be the most stable layout for the 1520 tank, but I was wondering if there is any issue with having the tank not in a level position during development. Presumably, if there is sufficient chemistry in the tank then the film will be in contact with it even if the tank is not exactly level, but thought it was worth verifying with someone who has used this combination before.

Adjusting the wheels so that all four support the area to the right of the locking collar seems to leave the tank vulnerable to tipping off the roller base.

mshchem · Jul 4, 2022

logan2z said:
I picked up a 1509 roller base a few months ago but haven't got around to trying it yet. It's obviously a very simple device, but I did have a question about using it with the 1520 tank:

Should the wheels be adjusted so that the tank sits as shown in the photo below? This seems to be the most stable layout for the 1520 tank, but I was wondering if there is any issue with having the tank not in a level position during development. Presumably, if there is sufficient chemistry in the tank then the film will be in contact with it even if the tank is not exactly level, but thought it was worth verifying with someone who has used this combination before.

Adjusting the wheels so that all four support the area to the right of the locking collar seems to leave the tank vulnerable to tipping off the roller base.

If you want to use as Jobo intends the tank should be level. The roller base works great for the bigger, or longer tanks. These rollers are especially handy when printing with a 28xx series print drum.

You could experiment, you would need more volume. Check out the balance with the recommended solution volume and the rollers adjusted so tank is level, should be less rocky.

Sirius Glass · Jul 4, 2022

No, move the rollers on the left in so they rollers are completely on the same cylinder. The tanks should be level not tilted over.

logan2z · Jul 4, 2022

mshchem said:
If you want to use as Jobo intends the tank should be level.

Sirius Glass said:
No, move the rollers on the left in so they rollers are completely on the same cylinder. The tanks should be level not tilted over.

Thanks, that's what I figured but this was the only image I found on the 'net showing the 1520 with the 1509. It's not the most stable adjusted so that the tank is level - even with the correct volume of chemistry in it - but I can make it work.

Any idea at what rate the tank should be hand rotated and how often one should change directions - assuming bi-directional rotation will provide the most even development?

mshchem · Jul 5, 2022

logan2z said:
Thanks, that's what I figured but this was the only image I found on the 'net showing the 1520 with the 1509. It's not the most stable adjusted so that the tank is level - even with the correct volume of chemistry in it - but I can make it work.

Any idea at what rate the tank should be hand rotated and how often one should change directions - assuming bi-directional rotation will provide the most even development?

I hope you are not trying to do E6 processing. The CPP3 program for these tanks, I believe, is 70 rpm. The tank revolves a few times then reverses. I have a Jobo Duolab, using the 1520 tank, it revolves in only 1 direction, I've used it for several years 9n and off with the 1520 tank no trouble.
Given your situation I would go one way for 30 seconds then reverse direction. If you bought a genuine Jobo roller I think you will like it. When you get a chance look for the extension module or a 1540 tank.

logan2z · Jul 5, 2022

mshchem said:
I hope you are not trying to do E6 processing. The CPP3 program for these tanks, I believe, is 70 rpm. The tank revolves a few times then reverses. I have a Jobo Duolab, using the 1520 tank, it revolves in only 1 direction, I've used it for several years 9n and off with the 1520 tank no trouble.
Given your situation I would go one way for 30 seconds then reverse direction. If you bought a genuine Jobo roller I think you will like it. When you get a chance look for the extension module or a 1540 tank.

I'm doing B&W only. I read somewhere that Jobo recommends 50 rpm for B&W which is still pretty quick. Don't know how critical that is, however.
I have the extension module for the 1520 but I haven't used it yet. Maybe this is a good reason to try it. Oh, and I did buy the genuine Jobo roller. Looking forward to giving it a try.

mshchem · Jul 5, 2022

logan2z said:
I'm doing B&W only. I read somewhere that Jobo recommends 50 rpm for B&W which is still pretty quick. Don't know how critical that is, however.
I have the extension module for the 1520 but I haven't used it yet. Maybe this is a good reason to try it. Oh, and I did buy the genuine Jobo roller. Looking forward to giving it a try.

On a processor the recommended speed may be faster? I know that Expert drums run slower (something like 50 rpm)
Follow the Jobo instructions.

logan2z · Jul 5, 2022

mshchem said:
Follow the Jobo instructions.

I would if they supplied any

Sirius Glass · Jul 5, 2022

logan2z said:
Thanks, that's what I figured but this was the only image I found on the 'net showing the 1520 with the 1509. It's not the most stable adjusted so that the tank is level - even with the correct volume of chemistry in it - but I can make it work.

Any idea at what rate the tank should be hand rotated and how often one should change directions - assuming bi-directional rotation will provide the most even development?

Yes, it should be bidirectional.

Using a Jobo 1520 tank with the 1509 roller base

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