[Jamming] Riso RZ 970 master disposal error, problem with one drum

[thibaut]

http://www.copytechnet.com/forums/ne...tml#post556950 . I tried to search with the correct terms but did not find anything very helpful or close to the problem I got with one drum. And as I am french, excuse my bad english.

I got a Riso RZ 970, working fine, with 2 drums : and old one working OK, and a brand new one, which got a problem.

The new drum has neverMaster Jammed in Disposal Unit - Pull Out Master Disposal Box and Remove Jammed Master). The master is not in the disposal box, and as soon as I check the box, then the error (the one which is really happening) A04-303 appears (Master Disposal Error - Pull Out Print Cylinder and Discard Master).
IMG_1414.jpg

[20gaugeO/U]

Re: Riso RZ 970 master disposal error, problem with one drum

Swap the clamp plate from one drum to the other (4 small silver screws on the piece you took a picture of), does the master disposal jamming move to the other drum now and the bright red now works fine? Compare the clamp plates very closely what's the difference. The new (bright red one) may have damage or something.

Someone else found attached problem on a like machine so it's something to look out for. Clamp projection plate was catching and not disposing of the old master Int Disposal Jamming 2.jpgInt Disposal Jamming.jpg

Good luck

[thibaut]

Re: Riso RZ 970 master disposal error, problem with one drum

Thank you for this reply !

So far, I tried one thing : to remove the master and clean the drum with isopropyl alcohol, in case the drum had too much ink and the master was sticking to it. It’s not that !

I can say every time, the master is bending after the disposal error (like on the picture of the OP). So yes, thank you 20gaugeO/U, I am going to change the clamp from the working drum to the not working one... (from the exterior, I don’t see a difference, from now)
And we’ll see !

UPDATE: Symptom identified !
I exchange the Clamp plate base from the working drum to the non-working one. No more errors. So, now, I am trying to understand what very basic thing it is around this part, like said 20gauge. I have just looked for 10 minutes and don’t see anything different from one to another... Any ideas?

[20gaugeO/U]

Re: Riso RZ 970 master disposal error, problem with one drum

The two white collars on the rear side intact? Take both clamp plates off and compare them side by side on a table, something is different, bent, cracked or missing.

Good luck

[thibaut]

[thibaut]

Re: Riso RZ 970 master disposal error, problem with one drum

[thibaut]

Re: Riso RZ 970 master disposal error, problem with one drum

NEWS !

So, I finally receive a brand new clamp plate from Riso.
It doesn’t work. Same error. Same problem. The master is still bend like on the picture of my first post.

It’s beginning to be very WEIRD ! To sum up, I have 1 riso, 2 drums. The blue drum (used), works fine. The pink drum (new), does not eject the master, it has never work. BUT, when I put the clamp plate from the working (blue) drum on the pink, IT WORKS.
That’s because of that I am very disappointed.

Now, I am thinking about 2 things : may be, the master disposal system (pressure rollers?) are a bit used and they only work fine with the used drum. Do you have some clues on this (where to test, where to adjust/check)? But really, I don’t know. I am still thinking it’s coming from the drum. May be another piece is linked or having an impact on the master removal process?
Thanks again for your participation on this bizarre problem !

[thibaut]

Re: Riso RZ 970 master disposal error, problem with one drum

I am replying again to my previous post, to add the last and final informations I can take from my machine !
I exchange the clamp plates again (the working one and the new, not working ones).

The working clamp plate is working OK with the working drum, but with the non working (pink) drum, it’s now tearing a part of the master during removal. I put a picture !

The brand new clamp plate, when putted on the working drum, does not work at all (same error as usual, master removal problem, and the master is just staying on the drum, with the upper level slightly bend).

I still don’t see a real difference between all the clamps, and I am beginning to think there’s something with the master ejection system.

Here is a picture of the part which is not taken by the master ejection system. The rest is torn and ejected is the master disposal box. IMG_2158.jpg

—Also, I have seen this thread, that seems talking about the same issues! http://www.copytechnet.com/forums/di...lack-drum.html

[20gaugeO/U]

Re: Riso RZ 970 master disposal error, problem with one drum

Try adjusting TM 543 (Master-clamp-amount adj) to a more negative value than what should be the default of zero. It will be a trial and error thing and once you find the working value you will need to adjust TM 541 (write start position adj) to correct the registration of the burned image.

[thibaut]

[20gaugeO/U]

Re: Riso RZ 970 master disposal error, problem with one drum

Both drums are driven by the large chuck on rear of the drum (dark grey/black looking thing) take them both out and see if one is loose or not that closely aligned??? If one was to far off it wouldn't go in the machine anyways...

There is no adjusting the disposal rollers except the speed of them (TM 578) which is already set to 10% faster than the drum, could try 20 or 30%. If you remove the disposal box and look on the front wall you will see 2 orange/yellowish levers, one stamped 1 and the other 2. #1 will release the pressure of the disposal rollers and #2 will push them back together, they are for jam removal. As long as all the belts (5 I believe) are there and in the centered groove you should be OK.

I don't remember if Print drum Position A stays saved in each drum but I don't know if you want to start messing around with all these settings. I'm still leaning towards a mechanical issue with the clamp plate... but hard to say. No matter what setting you change make sure you write down what it was at so you can easily set it back. A second set of eyes can be helpful and hopefully you have the manual already. You can also rig the front door safety switch and remove the small cover (1 screw) at about 11 o'clock above the drum and watch what's happening during the disposal with the help of a flashlight. Do not stick anything in there!!! Could damage the drum or you'll be typing with 9 digits... Good luck

[thibaut]

Re: Riso RZ 970 master disposal error, problem with one drum

Thanks for all your advices, all I have to say is that you know very well these machines !!

Both drums are driven by the large chuck on rear of the drum (dark grey/black looking thing) take them both out and see if one is loose or not that closely aligned??? If one was to far off it wouldn't go in the machine anyways...

Nope, for that, both are looking the same I think.

There is no adjusting the disposal rollers except the speed of them (TM 578) which is already set to 10% faster than the drum, could try 20 or 30%. If you remove the disposal box and look on the front wall you will see 2 orange/yellowish levers, one stamped 1 and the other 2. #1 will release the pressure of the disposal rollers and #2 will push them back together, they are for jam removal. As long as all the belts (5 I believe) are there and in the centered groove you should be OK.

IMG_2264.jpg

I don't remember if Print drum Position A stays saved in each drum but I don't know if you want to start messing around with all these settings. I'm still leaning towards a mechanical issue with the clamp plate... but hard to say. No matter what setting you change make sure you write down what it was at so you can easily set it back. A second set of eyes can be helpful and hopefully you have the manual already. You can also rig the front door safety switch and remove the small cover (1 screw) at about 11 o'clock above the drum and watch what's happening during the disposal with the help of a flashlight. Do not stick anything in there!!! Could damage the drum or you'll be typing with 9 digits... Good luck

[20gaugeO/U]

Re: Riso RZ 970 master disposal error, problem with one drum

Oops, step 1 should have been are all your disposal belts in place but your first post already seemed past that stage and onto another issue that can sometimes arise. Oh well replace all the disposal belts and you should be good for a couple years.

[thibaut]

Re: Riso RZ 970 master disposal error, problem with one drum

Oops, step 1 should have been are all your disposal belts in place but your first post already seemed past that stage and onto another issue that can sometimes arise. Oh well replace all the disposal belts and you should be good for a couple years.

I totally agree, that's why I am totally a newbie here, like I was saying on my profile, I am totally new to these machines but deeply interested to understand how it works.
Sorry again, to forgot this simple check.
At least I have learnt many things on the machine and drums. Thanks again, I will definitely post here, after replacing the disposal belts, to confirm everything is OK and indicate it in the thread.
Thanks so much for all the advices.

[thibaut]