KM C360 Rainbows at the edges of scan/copy

[vertigosystems]

Re: KM C360 Rainbows at the edges of scan/copy

I vote for bent frame.

We have seen similar issues when the scanner frame/support gets bent during shipping. It really does not take much of a bend to cause scanning issues. Seems like pretty much every time, it's the free-hanging left side of the scanner frame that bends downwards. It might be barbaric, but we have usually been able to fix this issue by lifting the machine from the front left corner of the scanner so it bends back into place. You can also use an appropriately-sized section of threaded metal pipe along with two flanges: put it in the document exit area, under the front left corner of scanner frame and screw the flanges outwards until they apply pressure to the frame (so it acts as a "spreader"). With some of our abusive clients, this added pipe support has become a permanent modification

I'm not above barbarism. That sounds like a very likely fix. The unit has the sorting tray and finishing unit installed, so I don't plan to have any paper coming out of the regular exit.
As far as bent metal goes, the Finisher had a bent metal top which prevented the switch from being depressed when the lid was closed and resulted in an Open Compartment message, fixed by pulling the metal bar upwards.

Call me Conan, cause I'm going to give this a try!

[907tec]

Re: KM C360 Rainbows at the edges of scan/copy

Sometimes, if you're lucky, you will actually feel the frame slip back into place. Take it slow, good luck.

[blackcat4866]

Re: KM C360 Rainbows at the edges of scan/copy

I was looking through your photos and GIFs:

-The wire rope tension looks right.
-The top frame is compressed down ~2mm at the center of the slit glass. Use a straight edge to confirm that.
-The mirrors appear to be seated correctly: Each mirror rests on three points. Rock each mirror in it's mount to confirm that it's snug at front and back, three mirrors, touching at three points each. And yes they are glass front surface mirrors, typical on all copiers.
-With the scan motor off you'll be able to tell if there are areas that drag. Clean the scan rails with alcohol. Use 30w straight weight motor oil (like you'd use in your lawn mower), a drop on your finger then wipe the scan rail surface. Two or three drops per rail is plenty. Be aware that the metal edge of the scan rails can be very sharp, and bleeding on them doesn't seem to help. And the oil makes it take longer to heal.
-Judging by the jagged edge of the margin, I'm pretty certain that the scanner is not moving smoothly.
=^..^=

[tsbservice]

Re: KM C360 Rainbows at the edges of scan/copy

As it may not hurt you can play a bit with CCD unit adjustment. There is a procedure for this in SM.
Just be sure prior move to mark old/original CCD position.

[vertigosystems]

epic heroes in my book.

[Phil B.]

Re: KM C360 Rainbows at the edges of scan/copy

Definitely possible, but to my eye, I can't see anything that looks like bent metal, certainly no bumps or bruises to the carriage. Everything moves smoothly from end to end.
As far as I can tell, the mirrors appear to be straight across without any kind of skew, although when moved over closer to the CCD, where the artifacting starts, it's hard to get a look at what's reflected into the mirror.

Just to be certain, are all the mirrors glass inserts or are there polished metal ones? The one that reflects the exposure tube upward seems like it might just be polished metal because no matter how I clean it, it remains ever so slightly hazy.


Well, the lower right corner has a chip in it where it touches the clip, and there was some shards inside, so I don't think the top glass was replaced. The mirror assembly is somewhat free-floating and has some play up and down since it's only guided by the springy drive cables, so my guess is either falling off a skid, dropped to hard which caused the lamp to move hard enough to crack, or bouncing in transit. They didn't lock the scanner before shipping.


Is that a post you're referencing? I couldn't find anything on that, but if you're referring to the strip near the ADF (black one side, grey other) then that is fully intact. On the bottom of the main glass, the ruler's stickers are slightly yellowed and have some minor air ingress from adhesive breakdown, but nothing out of the ordinary for a 160K printer.
doesn't seem to be any play in the mirrors other than as a whole carriage.
As a last resort, I might dismantle my C220 and check how the assembly is supposed to feel in terms of how taught the drive cables are.

Also, in regards to shipping claims, this wasn't an option since, unbeknownst to me, the freight operator that the shipper chose was a "budget" operator who offered no insurance of any kind. In all honesty, if I had paid more for it, I'd be upset, but ironically the freight cost more than the printer and I only put about $100 of parts into it so far (pickup rollers, secondary paper path guide and exposure lamp, of which I got two since one got temporarily lost in the mail so the company shipped another) So all in all I'm way ahead in terms of value provided I can resolve this problem. This unit included a fully outfitted finisher with it as well (minus saddle stitch)

ADF scans and copies come out perfect, so there has to be something wrong with the movement of the exposure/mirror unit.
I'm not sure of how taught or loose the guide strings should be, but after performing the step in the service manual under mechanical adjustment the pattern had moved mostly from the top of the image (blue) to the bottom of the image (orange).
I did not re-wind the drive cables since I didn't remove the motor but this might be my next step unless anyone thinks it unwarranted.

Attached is an album of a bunch more pictures and videos too large to attach, maybe someone can see something that I'm missing as far as the optics go.
KM C360 Prismatic Artifacting - Google Photos

1. Zoomed 110% scan - minor haze top and bottom.
2. Scanner movement (video)
3. Top glass lower right chip, doesn't affect the fitment/seating.
4. - 6. Exposure/mirror assy. Best I could do with the odd camera placement on my phone.

7. Manual movement (video)
8. - 14. Various views of mirrors
15. - Mirror and exposure freedom of movement (video)
16. - 21. More views of mirrors.
22. ADF scan of 11x17 - result is perfect with no shadows. Some minor banding in print output (either a flat spot on a transfer roller, or magenta developer)

white plate.. under top metal frame ..between slot for slit glass and platen glass.. a "sticker " solid bright white" have to have a dentist mirror to see it

cloth with cleaner ..wipe it good

w

[????]

Re: KM C360 Rainbows at the edges of scan/copy

رفع السكنر من جهة اليسار

[Phil B.]

Re: KM C360 Rainbows at the edges of scan/copy

رفع السكنر من جهة اليسار

please reply in ENGLISH....

this site is located in the USA...

doubtful any read that language

and frankly I am one that feels I shouldn't have to use " translate" to understand your post esp. since the WHOLE thread -= IS =- in English.

I have to assume that since you replied in your native tongue.. you UNDERSTAND what was being said

[????]

Re: KM C360 Rainbows at the edges of scan/copy

Lift the scanner from the
So that they are straight and not slanted leftIMG_٢٠١٩٠٤٠١_٢٠٤٥١.jpg