Risograph Drum I have a Risograph RP3100 that we have not used for a couple of months. When we tried to use it there is what I would call a dry spot on the drum and the text in that area does not print. I tried pulling the master back and rubbing the area with alcohol but that did not help. Any ideas????
Try run a hundred copies at slow speed and full density/ pressure.
If that fails get a can of WD40 and spray it under the master, then rub the area with your finger. this will desolve the dryed ink on the drum surface.
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Procedure for converting the color of a Z-type drum. Steps 1 - 9 also work ... Z-type Color Drums. Posted: 17 Oct 2014 14:04 by issuepress Last edit: 01 May 2015 14:20 by issuepress ... This tells the Riso to recognize newly installed ink tube.
Risograph The underlying technology is very similar to a mimeograph. ... This master is then wrapped around a drum and ink is forced through the ... Change the color drum, change the paper on the glass sheet, make a master layer and . ... Remember that every different color you want to print, you have to print separate.
First, the print head may be getting clogged and you need toremove the print head and soak (a couple of hours) it in warm distilled waterto dissolve the dried ink. Blot the print head dry with a lint free cloth beingcareful not to rub the electronics. Second, the new ink cartridges (if they arenot OEM) could be causing a problem. Reloaded or second party cartridges maynot always match the specifications for quality required by the printermanufacturer and may accelerate "gumming of the print head".
Anotherpossibility ofthis problemis toner leak. Check if yourtonerleaksin therubberfilterandcauseitto fall andthe quality ofyourprintsbadly.
Hope this willhelp you. Good Luck.
I had to do such a procedure a few months ago. - I got a drum which was not in use some month. This is normally no problem with original ink. But some cheap plagiators have their own ink recipe.
I used a solvent for professional offset printers. It is the one to clean the ink rollers with. it was blue colored and I think it is so with most manufacturers. (I have seen some brands for this purpose and all were lighter or darker blue.)
By the way, it isn't so easy as it seems: The drum looks clean enough after some time. But to remove really all of the hard and gummy ink inside I had to take the drum apart. It took so much time and was so dirty so I will do this again only if I get paid accordingly.
The drum cylinder of any risograph has a locking position. The drum position should be locked on before puting it back on the machine. After you confirmed the proper position and tried to putting it back and still no progress you do the following.
1. Removed the drum unit from its holder.
2. Use flash light and check inside of the machine. Check a shsft in the middle part of the machine where the drum put on.
Check the position of this shaft and the position of the drum hole where this shaft will put on.
3. Try to rotate this shaft according to the position of the hole of the drum then try to return the drum and put it back again.
4. If the drum won.t go in just half way, removed the drum and check the pressure roller position, if the roller are in highest position This roller in under the drum. If you see it blocking the drum removed the back cover and released the hook lever from pressure lever. You can see this by moving the roller and you will noticed its position,
You can clean it, thats a good idea but,,(and this is messy) roll back the master.. take out the ink cartridge, use a rod to squeeze some ink onto the area, and smooth it out into the screen with a plastic scraper.. Lay the master back over. Keep scrap paper around and print a big black square and run a couple hundred sheets through.. This will work. Messy but will work. If you don't want to manually put some ink on the area.. Print a large black square and run a couple hundred sheets.. see what that does.