C6500 Flipping blade (drum)

[Setright]

ill give you ROOT CAUSE lowest bidder manufacturing ,never had these problems when manufactured in japan or europe.

I hearrrrd that



I have had postive results with stretching the springs. Pull them slowly and as soon as you can feel them stretch past their elastic limit, release them again. The should be about 0.5 - 1.0 mm longer. NOT MORE, they won't clean the drum effectively.

A local colleague applies setting powder twice over on new drums, and his blades don't flip even though he doesn't stretch the springs.


I like the idea about trimming the blade corners off, since the blades I have seen tend to flip only in one side, suggesting that it is the corner that starts the flip.

[konikilla]

We,ve been buying 8050 blades and inserting them into the 6500 drum units. 3 machines giving this trouble. Not a peep out any of them for 4 weeks now!!!!

[seniortech]

Blade Flipping Problem

I have now tried everything suggested on this thread and am still having the blade flip problem. Fitted a special firmware patch from KM to try and cure this problem, but nothing works.

Customer has 8 machines and have now given us two months to resolve the problem permantly or they will terminate the contract.

I have been told that KM do not know themselves the underlying cause of this problem.

Has anyone else here been told otherwise, is there an end to this problem in sight?

[random]

I have now tried everything suggested on this thread and am still having the blade flip problem. Fitted a special firmware patch from KM to try and cure this problem, but nothing works.

Customer has 8 machines and have now given us two months to resolve the problem permantly or they will terminate the contract.

I have been told that KM do not know themselves the underlying cause of this problem.

Has anyone else here been told otherwise, is there an end to this problem in sight?

Remove the blade (take white holders off each end), clip the corners off the blade, put blade back in use alot of setting powder. I have had 100% succses with this method.

[seniortech]

Remove the blade (take white holders off each end), clip the corners off the blade, put blade back in use alot of setting powder. I have had 100% succses with this method.

Already tried this but without any success.

[konikilla]

Are you sure you have tried an 8050 blade in the drum unit. All our engineers our now using these and have reported no problems.

Something we were about to try but didn't as our problems seem to be sorted is to rub silicone oil onto the blade before insertion. Rub for at least 2 minutes so you have no blobs but just a very thin film of oil on the blade when you insert the drum. If the film of oil is to thick the toner will stick to it during cleaning and you'll get lines.

I've done this before when I was desperate to fix something similar. Although it was on a much smaller machine but the principle should be the same. Might be worth a try if your in a fix.

[sanchez]

BT recommends to take following action when C2214-14 occurs.

1. Step by step check items:

a. Check if cleaning blade flipping occurs on the corresponding color.
1) If the flipping occurs, replace the respective drum cartridge.
To prevent the recurrence of the blade flipping, be sure to apply setting powder on to the surface of the drum.
2) If the flipping does not occur, go to step 2.

b. Check the setting of the 10.3.8 Belt Line Speed Adj. (Printer Adjustment) in the Service manual.
1) If the setting value is not in the range between -5 to -35, re-adjust the value within -5 to -35.
* If -5 to -35 cannot give the satisfactory result, also perform the 10.3.3. FD Mag. Adjustment (Printer Adjustment).
After the adjustment, please check the recurrence. If the symptom recurs, go to step 2.
2) If the setting value is between -5 to -35, go to step 2.

2. Reduce the difference of the drum line speed and belt line speed using following special firmware and DipSW setting.

CSES-ID for the special firmware: DLBT0800069EN*
[Background]
If C2211-14 occurs though the set value is within -5 to -35, it is very likely that C2211-14 occurs due to too light drum drive torque.
Reducing the difference between belt line speed and drum line speed is effective.

----------DipSW21-6, 7-------------------------
bit6 bit7
0 0 : Default
1 0 : 0.1% up
0 1 : 0.2% up (Recommended value)
1 1 : 0.3% up
---------------------------------------------------
If the symptom recurs with the recommended value, try the 0.3% UP setting.





P.S. Info from european Infohub

[ni311]

It seems to me that this topic will never end. I never had one blade flipping and the biggest counter on a C6500 I am servicing it's around 1,500,000 Keep my finger cross Although I never checked where the drums I am using are made, I'll keep you informed...

[VIJN]

Drum blade flips

we also had drum blade flips on c6500 drum units but since changing only the black application roller from a 8050/c500 drum unit into a c6500 drum unit have never replaced a drum for blade flips. Have 2 machines doing over 200k each fortnight with less than 5% coverage on page and mainly black and white. Which use to flip blades every day to having done over 1mil prints each no problems. When you remove the roller from the 8050 drum unit and compare to the c6500 roller the coating is thicker, hence better lubrication. It takes about 45mins to rebuild all four drum units.you may waste 4 8050 drum units but its a small cost compared to a p_ssed off customer.
Try it,it works.

[Techead42]

I've had two of my CS650 boxes flip blades...one in particular was a fairly high-profile customer so I had to come up with a workaround...what I did was take a yellow drum unit that had flipped...I removed both tension springs, drilled a hole through the center of the blade frame, and inserted a larger spring underneath the blade. I reinstalled the blade assembly and then set the drum back in the machine...haven't had a flip yet, and it's been probably 60K since my mod. My thought was that since the blades have been flipping up due to possible drum surface issue, why not remove the upward pull of the tension springs and apply tension from below, right in the center? This seems to have worked well.

[Warming_Up]

Swap the blades

Swap the blades out of the old drum units into the new drum units. Works like a charm. Been doing it for months while KM twiddles their corporate thumbs...

[Techead42]

Swap the blades out of the old drum units into the new drum units. Works like a charm. Been doing it for months while KM twiddles their corporate thumbs...

Gotta love that corporate mentality....

[VIJN]

C6500 drum blade issue update

I have received good news from head office regarding drum blade flips. Km japan are supplying a number of 8050 drum unit application rollers to us. Km agree that changing these rollers fixes the blade flip issues. ( i told them that 3 mths ago).

They also state that the application rollers on the c6500 drum had not been changed and looking into what has caused the issue.

As for part number for this roller do not have yet but will keep you updated.

Hope this helps

[ColorGOD]

C6500 drum blade issue update

VIJN,
Where exactly did you hear this? I am in the US and did not hear of this. Do you have direct access to KMBT?

Also, has anyone tried

[buster68]

We've got this problem going on with most of our 6500's. We've tried the new 102B drums with no help. Our KMBS production print DSM said that KM is no where near finding out whats causing the problem. I will say that we have 2 5500's that we've not updated firmware on and they are working fine, even with the 102B drums. I think its version 40/41 firmware thats causing the problem. About the time we updated our 6500's we started having the drumblade flip problem, but we can't back down the firmware because of the perfectbinders and the version 2 Fierys.