DP-7170 /DP-7160 issues double feeding intermittently

[monstercopier]

HI I have a customer with Kyocera 3554ci and have been having issues with scanning using the DP-7160 or DP-7170.

We know the paper is not in great shape all the time. They have stacks of like 200-300 pages being scanned. But when scanning it skips a few pages.
Which now makes the user have to check every scan to make sure pages are not missing. It does not error out, they only find out when they count the pages in the scan.

We have changed the sep roller and all adf roller components. Oddly it seems to work for a few weeks and then the issue returns.
Total scans maybe like 1,000 pages in that time.

I replaced the entire ADF with a slightly used unit but every time the user does these large packages it skips pages.

So 2 ADFs, 1 the 7160 and the 7170 are doing the same thing.

Now this customer used to have Toshiba copiers before I replaced them with the Kyocera. They had no issues with the Toshiba skipping pages. We know the pages are sometime wrinkly and not in the best shape sometimes. But the argument is, the Toshiba had no issues wit the paper condition. Why does the kyocera.

Any help is appreciated.

My tech believes the issue is the cheap plastic where the sep roller sits in. But, how do we fix that.

Thanks,
Kunal

[bush_tech]

Did you replace the torque limiter along with the sep tyre?

[monstercopier]

Yes torque limiter and the paper feed assembly.

all these help for a few months

[tmaged]

The was a change to the spring (Bulletin N116) for putting too much pressure causing double feeding. That said, the made a really good ADF much worse, just for the sake of change.

[kuby]

Are the pages that are being scanned ones that have been stapled before? If so try turning them around with the staple side away from the entrance to the DF or fan them to make sure that they are not stuck together.

[monstercopier]

The was a change to the spring (Bulletin N116) for putting too much pressure causing double feeding. That said, the made a really good ADF much worse, just for the sake of change.

Unfortunately, I do not have access to bulletins. I have requested from 2 direct Kyo dealers hoping someone can get it.

I appreciate your input. Hoping this is the solution. As firmware is not.

My technician feels its cheap plastic where the sep roller sits, he feels the thin plastic with no metal or anything under is bowing slightly enough to cause this issue.
We are attempting to try and see how to address that as well, I was thinking like lead tape "used on rackets" or placing something under to give more support to avoid the slight bowing to strengthen the plastic.

[monstercopier]

Are the pages that are being scanned ones that have been stapled before? If so try turning them around with the staple side away from the entrance to the DF or fan them to make sure that they are not stuck together.

Yes we have tried this.
Its a mfg company and so after various staples and signatures as it passes along the process the paper is not in great shape.

But again the argument is, my old copier ran the same things thru just fine.

[ThisPete]

...But again the argument is, my old copier ran the same things thru just fine.

I've been hearing that line for ~35 years, bearing in mind how (generally) good modern copiers are.. they must have been f***ing brilliant years ago!!!

😁

[nathicana]

Here's the bulletin. It's from 2023 so check your DP serial number to see if it applies to your machine.

You can also look at the spring using a flashlight without any disassembly. Old spring is silver, new one is black.

2837_001.pdf

[monstercopier]

Here's the bulletin. It's from 2023 so check your DP serial number to see if it applies to your machine.

You can also look at the spring using a flashlight without any disassembly. Old spring is silver, new one is black.

[ATTACH]n1624888[/ATTACH]

THANK YOU!!! tech is going to check shortly

[dalewb74]

have you been on site and watched it happen? being a tech. you might see or hear something that the customer doesn't mention.

[monstercopier]

Here's the bulletin. It's from 2023 so check your DP serial number to see if it applies to your machine.

You can also look at the spring using a flashlight without any disassembly. Old spring is silver, new one is black.

[ATTACH]n1624888[/ATTACH]

Ok checked it out.. we have the black spring.

Machine was ordered and installed in Oct 2024. So looks like the new spring is loaded on them.

My tech says since our issue is not picking up the paper its not separating the papers, since it skips pages.

for Example while I was on site - scanned 200 pages thru the ADF. We then noticed about total scanned pages was like 194 pages. Seems to happen closer to end of the scans versus the beginning.
So its not separating a few sheets and 2 pages slip in together. We fan out all the pages prior to inserting but telling a receptionist to do a better job fanning is not going to work.

We are attempting to strengthen the bottom of the plastic near the sep roller. Hoping that helps.

[Lunatech]

First of all, good job getting a toshiba out of the field! Secondly, that spring really does make a difference. I have simply stretched to original spring to make it a little longer and made the thing work. Then I stated ordering the new spring and making sure all the equipment I am responsible for has it. I have had some cases when I stretched the new style spring, just a little, to overcome poor practices and or poor originals. It's not a hundred percent but what is? Oh yeah, the old machine.

[monstercopier]

I wish I could just put the old 7110 on the new box.
They ruined a good thing with the ADF.

[KYO_OEM]

we removed spring, stopper and pad to decrease the pressure and it works well.
Feed DP.jpg
Let`s try if it works.