Hello! I have a Risograph RP 3500. My color drum got stuck in the machine, but I was able to pull it out with the drum unlocking code in test mode and a little bit of force. I cannot insert another drum; the drum goes almost all the way in and then stops up against something. The drum locking / unlocking in test mode does nothing to help. When the machine is turned on, it just says to insert a drum. I'm not really sure what to do or if there is another way to have the machine reset everything in its drum chamber to a normal position. Any guidance would be greatly appreciated; I'm new to the RISO world! Thank you.
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Re: RISO RP Drum locking issue
The drum drive coupling in the drum cavity of the machine is not at home position. -
Re: RISO RP Drum locking issue
Remove drum and set it on a table. Look at the rear of the drum and you see the large metal slotted pin. Now look inside the machine at the back wall. There is a chuck that the pin goes into, I believe it should be pointing at 12 & 6 (???) whatever the the drum is looking like when locked into home position. Grab the chuck and turn it by hand until the 2 pieces mesh. You shouldn't have to turn much. It's trial and error.Comment
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Re: RISO RP Drum locking issue
If the machine has not been thrown out of time, you should be able to turn the drive key from inside the machine. If not then by moving the drive by hand in the back. Make sure the RISO is off and unplugged before doing either.
Also make sure the drum is in the home and locked position before trying to insertion.
Good luck.
Yeah what 20gauge said too!Comment
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Re: RISO RP Drum locking issue
Is this machine still working?Comment
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Re: RISO RP Drum locking issue
Her are some pic's from the service manual on how the flanges should be on the drum and the Riso itself. If they're not matching each other the drum will never go in, but you have to reassure that the timing is done on the drive unit, there are I believe 4 timing point to bring this Riso to optimal performance I hope you have the upgrade gear kit to keep it running smoothly or you can loose timing again.Comment
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Re: RISO RP Drum locking issue
drum drive coupling.jpg
There, I fixed it for you.
By the way, good catch on the upgrade kit.Comment
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Re: RISO RP Drum locking issue
When I was working on it the chuck and pin were aligned and fit together (though they may not have been at the 12 and 6 position, I don't recall), but the drum still stops just barely before locking into place. I did try a different drum and didn't had any luck. When powered on, the screen just says to insert a drum. Test mode starts up correctly and everything appears to be just fine. I'm going to give it another go on Tuesday, and I'll give an update. Thank you everyone for your assistance so far; I really appreciate it!Comment
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Re: RISO RP Drum locking issue
Are there any pictures of the machine that you can share, say like a picture of the opening to the drum cavity with the drum out of the machine? That would really help.
Here's the thing - we can't see your machine or what it is doing, and some of us need the visual input of seeing machines to work on them efficiently (I suppose that could just be me, though).Comment
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Re: RISO RP Drum locking issue
Attached are some pictures, one of the drum cavity, two of the drum itself, one of the drum "installed" (it's almost in there) and one of the screen which just gives the basic "insert drum" message. Thank you!!!Comment
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Re: RISO RP Drum locking issue
That's the weirdest thing. If I am interpreting those pictures correctly, the drum drive coupling in the machine is 180 degrees out of position to the coupling on the drum.Comment
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Re: RISO RP Drum locking issue
It looks it is out of timing, I belive the drive gears are the old ones, which caused to go out of timing, the main drum drive gears should be white and the coupling gear in the back should metal on both of tbem.
Just downloaded a PCI from the Riso website on the RP drive gearsLast edited by LA TECH; 08-02-2014, 05:40 AM.Comment
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Re: RISO RP Drum locking issue
I turned the drive key 180 degrees and the drum locked in and everything seems normal. The machine is definitely out of time though, won't print more than one print at a time, so I'll have to take a look at that.
Thank you for this resource, it seems all the drums (6) need the upgrade... I'm not really sure where to go for parts.
Thanks everyone for your input, again, I really appreciate the help!Comment
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Re: RISO RP Drum locking issue
Thank you for this resource, it seems all the drums (6) need the upgrade... I'm not really sure where to go for parts.
Thanks everyone for your input, again, I really appreciate the help![/QUOTE]
The upgrade was for the machine itself not the drums.Comment
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