MP 1100 Dog Ears Calling All High Volume Experts

[KopyKat]

I have two MP 1100s in the same location both with close to 6 mil. Everything been running great but now they are both dog earing the copies AFTER the fuser. The dog ears are not flat folded. I have cleaned the upper guide plates with the fingers and the fusers are recently PM'd. Even turned paper over too.

It is intermittent but will tend to get worse as the machines run until it eventually jams randomly in one of these locations 21-28 (between fuser exit and finisher entrance). Note: The customer does not duplex....just one-sided reports...a lot of them! Only runs 8.5 x 11.

I found that the pin on the drive shaft for the transport section (drives the heat pipe area and transport to duplex) is worn badly and have those ordered.

My question is does anyone have any additional advice? I was thinking that with them pushing 6 mil perhaps that the fuser exit guide plate could be part of the issue. But if that were the case the dog ears would be flat folded by the heat pipe roller, right??...these are just slightly bent up on the non-op side. Usually two to three inches in length.

Any feedback welcome.

[schooltech]

Are there any magnets or gate catches that might be moving when the fuser unit is pushed back in the machine? I'm trying to picture the fuser assembly right now, and I thought there are a few magnet catches, but I'm referring to the previous generation as I have not worked on this series.

[KopyKat]

Are there any magnets or gate catches that might be moving when the fuser unit is pushed back in the machine? I'm trying to picture the fuser assembly right now, and I thought there are a few magnet catches, but I'm referring to the previous generation as I have not worked on this series.

I've checked that the magnet catches are holding the all guide plates in place...replaced a couple that looked damaged. Even checked the inverter cover latches on the duplex unit thinking that it was not latching correctly. I know it's gonna turn out to be something either so simple that I can't see it or something worn due to age.

[Kopyrtek]

Hey KopyKat,have you pulled the finisher away to eliminate the entrance to the finisher?I know that i have seen the finisher not being level with the copier cause this problem.

[imaginemoko]

i hope this B070 4475 Holder:Ring:Fusing Exit:Ass'y is free well to move sp paper will pass smoothly... try to swap this upper cover guide plate...

[KopyKat]

Hey KopyKat,have you pulled the finisher away to eliminate the entrance to the finisher?I know that i have seen the finisher not being level with the copier cause this problem.

The machine is on a hard level floor no carpet. But I will try that. Thanks

i hope this B070 4475 Holder:Ring:Fusing Exit:Ass'y is free well to move sp paper will pass smoothly... try to swap this upper cover guide plate...

Thought about the guide plate but as I said above the dog ears are not creased at all...I would think that going under the Heat Pipe would crease them flat. These are just flipped up with no sign of any creasing.

[schooltech]

That's probably one of the only things I don't like about high-volume machines; trying to get the damn thing to be slow enough to see stuff like this as it is happening----compared to a 2022 or something doing this same thing. I would also assume that the heat pipe would 'de-curl' the paper a bit, unless the pipe cooling fan wasn't sufficiently cooling or there is no more alcohol in the pipe.

Isn't that heat pipe driven off of those flat, transport drive belts? I wonder if one of those has a small tear or something.

Yeah, you're probably right; it'll end up being something stupid.

Oh, one more thing I thought of----have you double-checked all of the drive and idle gears of the fuser unit carefully to see if one has a small crack or something?

When in doubt, grab another set of eyes so this doesn't turn into a nightmare call!!!!

[Scott_Lewis]

I'm with kopyrtek. The only place I've had issues on that series is at the entrance to the finisher. But, my machines don't have near the volume yours does.

[limo]

Check rb234 040

[imaginemoko]

The machine is on a hard level floor no carpet. But I will try that. Thanks



Thought about the guide plate but as I said above the dog ears are not creased at all...I would think that going under the Heat Pipe would crease them flat. These are just flipped up with no sign of any creasing.

In bellini C1 and C2 for this Dog ear at fusing i used to Bend tilt up the edge of that guide assy the one touches the magnet catch and one time that like spur is stuck up, i experienced creasing in after fusing area if pressure is already worn out or loose screw to attach the Hot roller assy. anyhow... have we inspect the paper feed rollers to registration fusing entrace guide, worth a try to check paper path also this enter lock switch. cleaning the contact or afixing its right position.... good thing also this cooling transport belt as they mention above. a tear or weak of this causes also delay. i hope it would help.

Good Luck..

[FRIDGEMAGNET]

Is the pressure roller in life?
I have had success with this by reducing the fuser nip to 7-8mm.
Also, although the jobs are not duplex, the copies may still use the duplex to give the correct page orientation and the duplex has been heavily modified over the last few years.

[tcs04]

I have two MP 1100s in the same location both with close to 6 mil. Everything been running great but now they are both dog earing the copies AFTER the fuser. The dog ears are not flat folded. I have cleaned the upper guide plates with the fingers and the fusers are recently PM'd. Even turned paper over too.

It is intermittent but will tend to get worse as the machines run until it eventually jams randomly in one of these locations 21-28 (between fuser exit and finisher entrance). Note: The customer does not duplex....just one-sided reports...a lot of them! Only runs 8.5 x 11.

I found that the pin on the drive shaft for the transport section (drives the heat pipe area and transport to duplex) is worn badly and have those ordered.

My question is does anyone have any additional advice? I was thinking that with them pushing 6 mil perhaps that the fuser exit guide plate could be part of the issue. But if that were the case the dog ears would be flat folded by the heat pipe roller, right??...these are just slightly bent up on the non-op side. Usually two to three inches in length.

Any feedback welcome.

Have seen this on a few machines, Ricoh tech UK confirm what KOPYKAT saya, Reduce the fuser nip to about 9mm. We have tried this a nd it seems to work.

Also, there have been a couple of bulletins over the years, one for the AF1085 and one for the MP1100. See attached.

We had some success changing the stripper fingers (see RTB)

[imaginemoko]

Have seen this on a few machines, Ricoh tech UK confirm what KOPYKAT saya, Reduce the fuser nip to about 9mm. We have tried this a nd it seems to work.

Also, there have been a couple of bulletins over the years, one for the AF1085 and one for the MP1100. See attached.

We had some success changing the stripper fingers (see RTB)

ah there was a bulliten on this issue... i just found it on visual inspection... thanks

[Shadow1]

I have the joy of having the highest number of print shops of any tech in our district, so I have a LOT of 85+ cpm machines...

Given the volume that must go through those machines and for the sake of your customer's sanity I'd say do all of the following and figure out the cause later:

Replace the strippers - they have caused this problem for me in the past. I never did see anything wrong with the old ones, but the problem disappeared instantly once I replaced them. Yes, I know this is before the heat pipe, but that does not crease dog eared corners flat. Remember the backside is resting on the transport belts and there is not enough tension to make a sharp crease. Also, the corner may line up between belts or in one of the belt holes and have little or no tension on it.

Check all of the spurs on the fuser exit guide. Remove any toner balls on the tips and make sure it spins freely - this has also caused odd jams and bent corners for me.

Clean the transport rollers. The MP9000 was famous for buildup untill the changed the plastic in the pro series, but there could still be a few spots here and there - just enough to skew the page slightly and make it catch somewhere else. It doesn't take much as fast as these things are.

Connect the tray heaters - Early in the day until the machine warms up all the way through I've had moisture burned off in the fuser recondense in the exit assembly and cause (mostly) jams. A drop of water on a paper guide is hard and sticky when you hit it at 40mph.

There are several 1way bearings in the exit assembly that should probably be cleaned / replaced, and a good inspection of all the idler pulleys and those funky 2 sided timing belts is also in order. I don't think the bearings your problem, as they have only caused intermittent jams for me, but they're about due to go out. Check the shafts as well - they tend to get scored pretty bad.

Check all the TB's for the duplexer as well - Fridgemagnet is correct, even though they are not duplexing all pages go through the inverter to exit face down.

Check the finisher very carefully - I've had a mylar sheet installed backwards from the factory on the upper exit tray folding or even tearing the paper and causing jams.

Good Luck!

[KopyKat]

Solution

Ok I'm sorry to report back this late but been very busy lately. I have good but baffleing news.

This has me confused...I went back to the customer two days later only to find that the machine had magically fixed itself...Seriously!! 10-20 cases of paper are run through the machine per week. I hate the FM (F'ing Magic) fixes. It's got me thinking maybe a bad pallet of paper??

Everything works fine now. No dog ears in a week. Kept in touch with the Key Op all week...he's one of my favorite customers, nice and laid back even when he is under the gun. Only went back for a follow up and found it had tossed a couple of SC 300's....changed out the Charge and Pre-Charge.

Damn, I really hate the way those coronas crash...at least on the previous models you'd get a few "tiger stripes" as a warning sign. These bastards suddenly just totally fill the page with the black stripes and code out SC300.

Thanks to all for the support.