Xerox 3050 cutter deletions?

[Scarecrow]

This machine has deletions on the left edge at exactly the same spot no matter how long the copy is - about 7" from the trail edge. Went through xerographics, replaced the cutter motor and gear - no slop in the gear at all. Did the dev block spacing adjustment. Happens only with roll feed, not with cut sheet. Cannot find an adjustment for the roll feed motor to speed it up to form a buckle so the cutter can do its job without stalling the paper for that instant. Anybody know the transfer height adjustment - current is to spec, but not sure the height is correct - and also maybe a roll speed adjustment? Or maybe suggest another reason for the deletion?
Thankx
Glenn

[technogeek2009]

Re: Xerox 3050 cutter deletions?

There is no transfer height adjustment in the 3050. The transfer current is adjusted through the pot on the HVPS.

Sounds to me like you may have either or both worn registration or paper feed rollers. As the diameter decreases on these rollers over time, the buckle is affected. So that when the cutter does its thing, there is insufficient buckle to prevent a smear on the print.

As a test, I have placed a few wraps of tape around the paper feed rollers to increase its diameter.
If you need to replace either roller, I can help you with an inexpensive replacement part.

[Scarecrow]

Re: Xerox 3050 cutter deletions?

There is no transfer height adjustment in the 3050. The transfer current is adjusted through the pot on the HVPS.

Sounds to me like you may have either or both worn registration or paper feed rollers. As the diameter decreases on these rollers over time, the buckle is affected. So that when the cutter does its thing, there is insufficient buckle to prevent a smear on the print.

As a test, I have placed a few wraps of tape around the paper feed rollers to increase its diameter.
If you need to replace either roller, I can help you with an inexpensive replacement part.

Technogeek, Thankx for your reply. Tried the tape on the 2 precutter rolls and no worky - actually made it worse. Today I discovered I may have been in a little bit of error: the deletion does seem to start at aproximately the same place every copy using only the roll feed. It absolutely stops each time 6 1/8" from the trail edge. There is good image on the drum. Transfer height is set below the lead in baffle. It's almost as if the reg rolls are not parallel to the drum, causing a buckle that will bend the paper away from transfer. If the reg roll were worn on the left side - where the problem is - that roll would have to be larger to speed up the paper to cause the buckle at transfer. If the fuser were not parallel to the drum, the problem would also be on the cut sheet. I've swapped the 3 roll and drive clutches, and sensors from tray 2 - not used cause their tray is missing - and the board and motor that drives the precutter rolls. Tried a cut sheet taped to roll to elimate paper - still there. When did all this start? Don't know. I think with the high humidity in summer. I did put in another heater from a 2510 roll feed unit. Seemed to fix it - for a while. But those deletions may not have been the same as now. There are 3 samples cut from 3 copies. The deletion does not go across the page. 57k ft on the machine and very low volume - not more than 10/day. Seems unlikely rolls would be worn this early but I will mic them out and compare with another (used) set. Kinda running out of options. Any ideas?

Thankx,

Glenn

[Scarecrow]

Re: Xerox 3050 cutter deletions?

After all that I forgot mention that I ran it without the cutter connected - Still there.

[technogeek2009]

Re: Xerox 3050 cutter deletions?

OK, you really have me wondering now! The samples that you posted, were they simply cut along the length to illustrate what the deletion looks like? Is it safe to assume that the rest of the 36" wide print would look normal?

Do you have a manual? If so, have you performed adjustment 8.3, Media Transport to drum spacing? If not, that is one I would highly suggest you perform. This adjusts the parallelism of the media transport relative to the drum, which in turn affects how the paper mates up with the drum prior to transfer. If you need a manual, let me know. In fact, now having reread your last note, I am reasonably certain this adjustment will fix your problem. The fact that the deletion always ends once the paper is cut confirms that there is tension on the paper between the drum and paper roll. Once the paper cuts, it allows the paper to shift enough to regain proper transfer.

I am a little confused by your statement that this problem does not show up when printing onto cut sheet, but if you disconnect the cutter, the problem is still there. It might be helpful to discuss this one over the phone. Feel free to call me during the day, particularly if you plan to be onsite at the machine. Drop me an email and we can set up a time to talk. cbyrne@goevergreen.net

Carl

[Scarecrow]

Re: Xerox 3050 cutter deletions?

OK, you really have me wondering now! The samples that you posted, were they simply cut along the length to illustrate what the deletion looks like? Is it safe to assume that the rest of the 36" wide print would look normal?

Do you have a manual? If so, have you performed adjustment 8.3, Media Transport to drum spacing? If not, that is one I would highly suggest you perform. This adjusts the parallelism of the media transport relative to the drum, which in turn affects how the paper mates up with the drum prior to transfer. If you need a manual, let me know. In fact, now having reread your last note, I am reasonably certain this adjustment will fix your problem. The fact that the deletion always ends once the paper is cut confirms that there is tension on the paper between the drum and paper roll. Once the paper cuts, it allows the paper to shift enough to regain proper transfer.

I am a little confused by your statement that this problem does not show up when printing onto cut sheet, but if you disconnect the cutter, the problem is still there. It might be helpful to discuss this one over the phone. Feel free to call me during the day, particularly if you plan to be onsite at the machine. Drop me an email and we can set up a time to talk. cbyrne@goevergreen.net

Carl

Carl , Thankx again for your reply. Yes, they are cut from copies, and no, the deletions do not continue across the copy. I do have a 1993 edition manual - but the 8.3 adj must have been added later. When I disconnect the cutter using roll feed, the problem is still there. I did this to varify that the cutter action was not causing the deletion - the cutter is faster than the deletion is long, but I had to try it. Definetly interested in the 8.3 - Wonder what else I need to know - you've been a great help. Thank you.

Glenn kopykat@rochester.rr.com or glennroberts50@msn.com

[Scarecrow]

Re: Xerox 3050 cutter deletions?

Carl , Thankx again for your reply. Yes, they are cut from copies, and no, the deletions do not continue across the copy. I do have a 1993 edition manual - but the 8.3 adj must have been added later. When I disconnect the cutter using roll feed, the problem is still there. I did this to varify that the cutter action was not causing the deletion - the cutter is faster than the deletion is long, but I had to try it. Definetly interested in the 8.3 - Wonder what else I need to know - you've been a great help. Thank you.

Glenn kopykat@rochester.rr.com or glennroberts50@msn.com

Carl, Just looked at my 8830 manual. Is it the same? .030 drum to baffle spacing?

[Scarecrow]

Re: Xerox 3050 cutter deletions?

The .030 media baffle adjustment fixed it! My manual is 1992 & 93 without that adjustment. You would think that after being a rep for a hundred years, that I would learn: If you can't fix it, make sure your manual is up to date! Then again, how do you know what the latest is?

Thankx again!


Glenn