iR 5070 dog's ears via fuser

[Dexor]

It only does it on heavy paper - and not always. I got to test it, copies were fine. A few min later, it started curling the lead edge corners down (front and rear, sometimes front only) - dog's ears effect.
TEmp/pressure from the fuser and paper is likely hitting something just past the fuser rollers, or before exiting (via finisher). It's hard to stall this to catch the fault, because it sometimes doesn't do it.
Adjustments? There are two screws with springs to the left of the fuser unit - what are they for?

[SCREWTAPE]

If its intermit what makes you suspect its happening when passing thru the fuser?

Those two screw with the two springs are where nip adjustments are made.
These springs apply pressure between the fixing and pressure roller.
Do not adjust these springs!

[Canuck]

Face up or face down delivery?

[Dexor]

Face up or face down delivery?

Good question, I was wondering about it myself - dog's ears are happening when copy comes out face down. Why are they sometimes come face up (no dog's ears on those occasions); but then I also had face down coming out, and - no problems. Not consistent...

[Dexor]

If its intermit what makes you suspect its happening when passing thru the fuser?

If it was happening before the fuser the ears would have been flattened down good - as it is, they seem to be hitting something past the fuser, as the corners are just bent, not flattened out.

[SCREWTAPE]

If it was happening before the fuser the ears would have been flattened down good - as it is, they seem to be hitting something past the fuser, as the corners are just bent, not flattened out.

Good point.

[Dexor]

Those two screw with the two springs are where nip adjustments are made.
These springs apply pressure between the fixing and pressure roller.
Do not adjust these springs!

I did adjust them down a bit - and it seemingly fixed my problem. Quick sand territory here

[SCREWTAPE]

Check around the fuser and delivery area good...

Check the claw separating. Check the duplex unit area under the fixing unit.

Check the flapper and its solenoid on the duplex unit.

Look for jammed paper. Something is causing it.

[SCREWTAPE]

I did adjust them down a bit - and it seemingly fixed my problem. Quick sand territory here

Well what ya know, humm.

I hope it sovled your problem.

Were they tampered with before???

[Dexor]

Were they tampered with before???

Not sure - it's a wild catch from the local 'scoop and fix' company. Will update later - if issues come up.
BTW - like your avatar - the death of death

[Canuck]

I did adjust them down a bit - and it seemingly fixed my problem. Quick sand territory here

Scary if that fixed it. Does the web seem dirtier than usual? These machines are noted for pressure roll bearings and end shafts self destructing...as little as 200k. If the pressure roll seems to be contaminated with toner it could dog ear...like dirty fixing film ends on other products. Face down delivery is to retain order of documents...document feeder feeds from top of stack. If just 1 original,face up(depends how adjusted in service mode). Check for jams logged in the reversal area...could be paper cuts in guides,flapper

[Dexor]

In two days, and this one isn't yet done, customer hasn't called. U roller has a mark right in front, no issues with copy quality, but there are signs of fused job in the near future. 220k,so I'd be ready...
Thx for input