Taskalfa 250ci - Transfer Belt stick to all drums over weekend

[wragsdale]

Re: Taskalfa 250ci - Transfer Belt stick to all drums over weekend

I've seen a stuck belt on a 5500i, which is oddly the only one seen of any model by any techs in our shop. The belt is quite different from 250ci, obviously, but you've got similar transfer roller and belt material I would assume.

Still unsure as to what the cause may have been. I was able to get it unbound but it had been damaged and was not fit to go back into a customer's machine.

[jmaister]

Re: Taskalfa 250ci - Transfer Belt stick to all drums over weekend

Transfer belt may "physically" touch the drum when its inactive. But when powered on I'd like to think the belt is gliding on a layer of voltage.

as to the things you see, whitish marks that you could water off easily off the drum(but not with de-ink) may be the charge roller in the drum assembly. Comparing the T-belt these things like to oxidize mad.

you could unscrew it from the front, careful not to over tighten on the plastic frame, and slide it out.

[NeoMatrix]

Re: Taskalfa 250ci - Transfer Belt stick to all drums over weekend

Sounds like thermal run away over temperature problem. Are the fuser lamps turning on off at the correct timing?
Is the machine dropping down to stand bye mode an shutting off over the weekend?
Is the server waking the MFD over the weekend every hr or so with a network ping which may keep the fuser active without any use all weekend.
I never seen the problem on Kyocera but I have seen similar on other brands

[AlexRust]

Re: Taskalfa 250ci - Transfer Belt stick to all drums over weekend

Transfer belt may "physically" touch the drum when its inactive. But when powered on I'd like to think the belt is gliding on a layer of voltage.

as to the things you see, whitish marks that you could water off easily off the drum(but not with de-ink) may be the charge roller in the drum assembly. Comparing the T-belt these things like to oxidize mad.

you could unscrew it from the front, careful not to over tighten on the plastic frame, and slide it out.

Whitish marks has to be scrapped off with plastic scraper. Not "water off easy". I can assure that I was definitely saw and feel when transfer belt was pretty firm stick to the all 4 drums. Left mark on each of them. Sorry could not take pics today. Will upload pics tomorrow for sure.

[jmaister]

Re: Taskalfa 250ci - Transfer Belt stick to all drums over weekend

Whitish marks has to be scrapped off with plastic scraper. Not "water off easy". I can assure that I was definitely saw and feel when transfer belt was pretty firm stick to the all 4 drums. Left mark on each of them. Sorry could not take pics today. Will upload pics tomorrow for sure.

Did you try water? you'd been surprised too.

I dont mean without contact to scrape it off, but definitely easier. What you described reminded me refurbing a machine earlier this month.

The belt has to be lifted to get over the notch it sits in and slide out. But if its really stuck, then something strange is going on.


Voyagers, the predecessor of your machine introduced in 2006 similar in design and material, does not stick to drums. We've seen lots of those and have lots of those in the shop waiting to junk.



*still check those robber rollers i mentioned, see if there're matching marks.

[mita]

Re: Taskalfa 250ci - Transfer Belt stick to all drums over weekend

I would agree with Gar on this one the belt is old although it is such a low copy count it has probably power cycled/single copy jobs that it's finished. I have seen this before on one or two other low volume machines.
Just my two cents worth.
Brian

[blackcat4866]

Re: Taskalfa 250ci - Transfer Belt stick to all drums over weekend

If the fuser was experiencing this thermal runaway, you should see evidence in the fuser and exit sections. Most everything is plastic, and will warp, distort, melt and stink. =^..^=

[blackandwhite]

Re: Taskalfa 250ci - Transfer Belt stick to all drums over weekend

we are replaced so many transfer belts for this issue...finally we solved the problem ,ask customer to make at least 5 copies colour for every day morning and evening...then for the week end told them to open the front door and left door slightly...
the rubber belt contacting the drum unit in standby mode and if the machine kept under this condition for a long period (may two days or two months) the belt surface will stick above the drum contact area...up to today we are not clear, why this happening ...as a common knowledge rubber will melt after some time ,if you kept idle...

we knew this is not the correct way to solve the problem.but no suggestion from Kyocera Also...so to save your time, money and your weekend you should find some old school ideas

[AlexRust]

Re: Taskalfa 250ci - Transfer Belt stick to all drums over weekend

Sorry guys, was sent to remote area to do job and just now uploading pics.
IMG_0732.JPGIMG_0733.JPGIMG_0734.JPGIMG_0735.JPG

[copydocinc]

Re: Taskalfa 250ci - Transfer Belt stick to all drums over weekend

I know this sounds weird, but I have experienced this. My customer was using a portable air filtration system in their office, you know to keep the air clean.
They had no problems until they put this air filter in their office, It took us a while to figure it out, but it was even turning rubber rollers soft and causing some
metal frames to show rust. I asked them to unplug the air filter for a month. They did, and all problems went away, except for the rusted metal was still rusted.

I then had another customer with the same problems and noticed they had the same model air filter in their office. Told them to remove it and everything good again.
I don't remember the model, but it was a wood grain exterior, if you notice such a thing, it could be the problem.
I know it sounds weird, but it was the fix for me, twice.

[ZOOTECH]

Re: Taskalfa 250ci - Transfer Belt stick to all drums over weekend

Excuse me for jumping in here, but why is the belt in contact with the drums when in standby/sleep mode?
Shouldn't the belt unit be in a 'free' mode without contacting the drums?
I could see if power was shut off too quickly, and the belt didn't have time to retract to a 'free' position,
but otherwise the belt should only make contact when producing an image for copy/print or self calibration.
Or does this machine not do that?
I will apologise in advance here, because I don't know this machine.

[blackcat4866]

Re: Taskalfa 250ci - Transfer Belt stick to all drums over weekend

Excuse me for jumping in here, but why is the belt in contact with the drums when in standby/sleep mode?
Shouldn't the belt unit be in a 'free' mode without contacting the drums?
I could see if power was shut off too quickly, and the belt didn't have time to retract to a 'free' position,
but otherwise the belt should only make contact when producing an image for copy/print or self calibration.
Or does this machine not do that?
I will apologise in advance here, because I don't know this machine.

On this model the primary belt unit does not retract, but the color primary transfer rollers do retract on a scissors mechanism, operated by a small DC motor and two cams. The belt remains in contact with the drums. This is one of the irritations of this model. Any time you want to remove a drum you must first remove the fuser, back the transfer unit out a few inches to clear the drums (the transfer belt ramps up about 10mm as you slide it out), remove the toner cartridges, remove the hopper assembly, remove the developer units, ... then finally remove the drums. It's inconvenient at best ... and definitely worse if the belt is glued to the drums. =^..^=

[ZOOTECH]

Re: Taskalfa 250ci - Transfer Belt stick to all drums over weekend

On this model the primary belt unit does not retract, but the color primary transfer rollers do retract on a scissors mechanism, operated by a small DC motor and two cams. The belt remains in contact with the drums. This is one of the irritations of this model. Any time you want to remove a drum you must first remove the fuser, back the transfer unit out a few inches to clear the drums (the transfer belt ramps up about 10mm as you slide it out), remove the toner cartridges, remove the hopper assembly, remove the developer units, ... then finally remove the drums. It's inconvenient at best ... and definitely worse if the belt is glued to the drums. =^..^=

Tks BC; I can't imagine an engineer would design a transfer unit this way - but, I'm not really surprised.
I really hate design engineers that don't take in consideration what the tech has to do to fix a problem.

[subaro]

Re: Taskalfa 250ci - Transfer Belt stick to all drums over weekend

Sticking Transfer Belt is the reason I took machine apart. So the problem was there before I got this copier.

We have lots of machines sitting on our storage area for long periods and not once seen this issue with any model or brand. You received the machine with this problem and my theory is , the previous service person may have used some product that broke down the belt a bit and hence the problem. Transfer belt are robust . I did one experiment a few weeks back to see if a transfer belt can be restored. I used a variety of chemicals, fedron, cannon belt cleaner, alcohol, and other stuff. the belt came out lot better and to my surprise it worked better and the belt surface was not damaged. The only thing though, i did not let the chemicals sit on the belt, but used a used green scoring pad to rub immediately. how some light can be shed to this mystery for real.

[Gar the pilot]

Re: Taskalfa 250ci - Transfer Belt stick to all drums over weekend

THE PIC'S match the problem we had with ours, the belt was 5 years old and showed it. diffrent enviroments could have an effect on these for sure and we have cleaned these too. I believe they just age out and placement plays a part of how soon. Are the newer class better about these issues? I have the small FS color machines out and so far so good, other than small toner ctgs.

Merry Christmas to those who lean that way. Happy ?? to everyone else.
Gar