KM6500 Expertise needed

CopyMonkey · 09-09-2008

I am in dire need of help with my KM6500 (Ikon CPP650). I will admit up front that I am an end user. I work with both a CPP500 and a CPP650 in a print for pay environment. I am not looking for user manuals or codes to access the internal workings of my machine. I have a fabulous tech for that. What I am looking for is if any of you out there with experience on these machines have seen some of the problems that I am encountering. Any feedback would be greatly appreciated.

For the last month, one particular type of paper has been jamming in the fuser of the 650. It is 100# gloss text. We thought it was the paper, so we ordered a different brand from a different supplier. Now it jams every 12 sheets (we run it 12 X 18). I have read the thread concerning this in the forum and have tried bumping the weight both up and down. Still jams. If I want to use the toner reduction function mentioned would I need my tech to do that?

The machine just had a PM less than two weeks ago. We had to have the coronas cleaned yesterday. We have installed a transformer to control the voltage (tech thought it was too high). Has anybody found an optimum voltage aside from the factory specs?

We seem to go through transfer belts faster than we should because of streaking. Any suggestions?

Thanks in advance for your help.

**Specilist KVN** · 09-09-2008

Originally Posted by CopyMonkey

I am in dire need of help with my KM6500 (Ikon CPP650). I will admit up front that I am an end user. I work with both a CPP500 and a CPP650 in a print for pay environment. I am not looking for user manuals or codes to access the internal workings of my machine. I have a fabulous tech for that. What I am looking for is if any of you out there with experience on these machines have seen some of the problems that I am encountering. Any feedback would be greatly appreciated.

For the last month, one particular type of paper has been jamming in the fuser of the 650. It is 100# gloss text. We thought it was the paper, so we ordered a different brand from a different supplier. Now it jams every 12 sheets (we run it 12 X 18). I have read the thread concerning this in the forum and have tried bumping the weight both up and down. Still jams. If I want to use the toner reduction function mentioned would I need my tech to do that?

The machine just had a PM less than two weeks ago. We had to have the coronas cleaned yesterday. We have installed a transformer to control the voltage (tech thought it was too high). Has anybody found an optimum voltage aside from the factory specs?

We seem to go through transfer belts faster than we should because of streaking. Any suggestions?

Thanks in advance for your help.

When running gloss stock you need to be very specific with the settings.
In the paper type you can even identify if it is a laser rated stock or an offset stock. That is the first step, set the settings accurately.

The toner reduction feature is available through the driver features.

If it is jamming in the fuser unit, there is a switch on the front, (opposite side from the paper feed). This switch can be moved to increase or decrease the fuser gap/tension.

If it is failing in the paper tray, try adding some weight to the feed roller by taping, yes TAPING a washer or 2 to the top of the unit.

Finally, have you checked the grain direction of the stock? If so, try using one of a different direction, this will also greatly affect the way the stock will wrap around the fusing unit itself.

Hopefully these tips will help you with your issues.

random · 09-10-2008

when your tech rebuilds the transfer belt he must polish all the rollers in the unit. Otherwise it will give you lines in a very short time.

CopyMonkey · 09-11-2008

Thanks for your help!

When you say that the toner reduction is in the printer drivers, is that in the RIP itself? We run a CREO and can't seem to find that specific function.

**Specilist KVN** · 09-11-2008

Originally Posted by CopyMonkey

Thanks for your help!

When you say that the toner reduction is in the printer drivers, is that in the RIP itself? We run a CREO and can't seem to find that specific function.

AAAAAAAHHHH, this is a feature of FIERY ONLY.

Fiery comes with the tools to control and "tweek" the actual profiles so it has access to some more advanced features as far as colour.

If you are having issues with a stock, and the settings on the Creo are correct as far as type and weight, then you consentrate on the hardware aspect, such as fuser tension and my other suggestions.

Stock grain can have a HUGE impact on running as well as humidity and temperature fulxuations.

random · 09-12-2008

on your creo goto gradations and drag the top right hand corner of the line down about 2% you will get a similar effect.

**Specilist KVN** · 09-12-2008

Originally Posted by random

on your creo goto gradations and drag the top right hand corner of the line down about 2% you will get a similar effect.

Doing this you are altering the "filter" between the profiles, thus adding a fourth bit of "math".

This is the same as adjusting the contrast in Photoshop and and will flatten the image/output.
Fiery maximum density setting is relevant to colours and profiles.

Your problems are more "hardware/settings" related when it is a specific type of stock.

**Juxta5** · 09-12-2008

I've experienced the paper jams on these Konica's when the feed roller that immediately "follows" the fuser needs replacement. Sometimes the reason for the jam is that the paper does not cross the line of sensor's number 17 or 19 at precisely the right moment when "exiting" the fuser and the Konica will time-out and throw an error. If the feed roller is worn it will not pull gloss stock quickly or accurately enough.

If your transfer belt is scratching often, double check that your service person is applying enough setting powder to the cleaning blade so that it does not scratch the belt. Check that the cleaning blade does not have any nicks in it and that the belt cleaning blade's brushes (one on each side) are not worn. The belt should move freely, with no resistance, and the blade should glide on it.