C3220 Copy/Scanner problem

[h.wood]

I have a problem with the scanner in a C3220 that does not return fast/far enough when using the DADF-K1. (letter size copies)

If copying single pages, no problem. Even two pages usually are OK.
But typically on the third page the scanner does not return to the start position before lighting up and scanning what ends up being part of the third and part of the second page.
By the fourth page, the scanner ends up hitting the right stop and humming. Oddly, there are no error codes thrown (wouldn't the home position sensor need to be reached between pages?).

So, here it is with --- for scanned locations and ___ for scan bed.

1: |--------__________|
2: |--------__________|
3: |_____--------_____|
4: |___________-------|
5: |_______________---|

Essentially, after the first copy, the scanner only "returns" a few inches, and starts again from there.
Any ideas as to the problem and how to fix it?
I do have a donor machine available, but what component is at fault here?

Thanks!

[h.wood]

Re: C3220 Copy/Scanner problem

BTW: This copier did not originally have a doc feeder attached.
Are there settings that need to be made to the reader unit when adding the DADF-K1?

Thanks again!

[teckat]

Re: C3220 Copy/Scanner problem

BTW: This copier did not originally have a doc feeder attached.
Are there settings that need to be made to the reader unit when adding the DADF-K1?

Thanks again!

1. Make sure in service mode level 1 COPIER>OPTION>BODY>MODEL-SZ is set to 1.
2. Make sure in service mode level 2 COPIER>OPTION>BODY>SCANSLCT is set 1.



When Scanner stops there may be a buzzing noise and scanning will start from where the scanner stopped.
try re-seating the Scanner Motor connections at the Interface PCB.
or Replace the Scanner Drive Motor, FM1-0407-000

+++++++++++
also need a Sensor Init
Sensor level adjustment
1) Stick an all black piece of paper over the final document detection sensor on the document
tray.
Make sure the black paper is not over the document set sensor.dadf.JPG

and Tray Width Adjustment

1. Set LTR paper in the DADF document tray and adjust the slide guide to the width of the paper.
2. Remove the DADF controller cover and set dip switch [DSW1] bits 3 and 4 ON and then press SW1.
3. Check that LED2 is ON.
4. Adjust the slide guide to LTR-R.
5. Press the push switch SW1.
6. Check that LED1 is ON.
7. Press the push switch SW1.
8. Set all bits on the dip switch [DSW1] OFF.


also---clearing the CPU of the Printer Control Panel could the problem.
Corrupt data in the Rom of the CPU could cause a communication failure of commands between the Control Panel and the DADF Controller.

Perform the following to clear the CPU:
Service Mode Level 1 > Copier > Option > Clear > MMI/Copy. Highlight and Press "OK"

Before Clearing the MMI/Copy, be sure to write down any and all user functions stored in the Control Panel; in order to re input the data later.
Also, if a Fiery imagePass RIP device is installed (ex: imagePASSC1/C2), the setting for Interfacing between the Device and Printer will be defaulted back to "0" and the machine will lock-up when rebooted.

To reset the interface, perform the following:

Service Mode >Level 1 > Copier > Option > Int-Face > IMG-CONT set to "3". Reboot the machine, in order to reestablish the connection between the Device and Printer.

[h.wood]

Re: C3220 Copy/Scanner problem

Hi, and thanks for the information!

I have added the SCANSLCT setting (it was 0) - no effect.
Confirmed the MODEL-SZ as 1.

I have reseated the interface board connectors, and now the feeder does not seem to be working...
The document detect lamp will not light. But I have seen the bits change under COPIER>IO>FEEDER when paper is placed, or doors opened.

So, until I figure this one out, I am stuck since the scanner problem is only a problem when using the feeder.

Ideas as to what happened?

Thanks!

[irtek]

Re: C3220 Copy/Scanner problem

Had the same problem a few years ago. The problem is in the flywheel on the scanner motor. If you pull the rear scanner cover off you will see the motor on the left side (facing rear of machine). The flywheel is held to the hub by a magnet. I pulled the flywheel off and the scanner worked properly. But I did not want to later have a problem with scanner jitters. I did not know if the problem was caused by the magnetism on the motor shaft or the flywheel slipping on reverse scan. I removed the magnet from the flywheel and glued the flywheel to the hub. That was about 4 years ago and I have never had the problem return on that machine and have not seen the problem on another.

[h.wood]

Re: C3220 Copy/Scanner problem

In another thread related to the DADF-K1 not detecting documents, teckat asked:

did someone remove & reconnect that square interface DF PLUG while printer was on ??



In this case, the answer is 'yes'. So, what is the recovery method?
I have cycled power, and like I mentioned earlier the DF seems to be detected and the document detect I/O bit toggles (but I do not get the green "ready" indication on the feeder).

[I will also verify that the ADF open/close actuator is functioning.]

Thanks!

[Canuck]

Re: C3220 Copy/Scanner problem

Make sure it is a K1 and not a B1-DADF...look the same but different controller board. Probably scanner motor issue as described earlier

[h.wood]

Re: C3220 Copy/Scanner problem

Thanks all!

I ended up swapping just the flywheel assembly from my donor machine...and it works perfectly.
[If it acts up again, it gets glued.]

My own fault on the feeder. When the rear cover is off, the ADF open/close actuator has nothing to hit against. So, it thinks the ADF is always open.

Can anyone explain the failure mechanism with the flywheel causing the scanner to not return?
I can see the magnetic "clutch" letting the scanner return fast while the flywheel slips. But, why would gluing the flywheel to the hub be better?
The only thing I can come up with is if the old flywheel had enough slop to make it shudder rather than slip. Would that put more drag on the motor rather than the intended less?

Thanks again,
Jim

[teckat]

Re: C3220 Copy/Scanner problem

Thanks all!

I ended up swapping just the flywheel assembly from my donor machine...and it works perfectly.
[If it acts up again, it gets glued.]

My own fault on the feeder. When the rear cover is off, the ADF open/close actuator has nothing to hit against. So, it thinks the ADF is always open.

Can anyone explain the failure mechanism with the flywheel causing the scanner to not return?
I can see the magnetic "clutch" letting the scanner return fast while the flywheel slips. But, why would gluing the flywheel to the hub be better?
The only thing I can come up with is if the old flywheel had enough slop to make it shudder rather than slip. Would that put more drag on the motor rather than the intended less?

Thanks again,
Jim

=======================================

it's for the interior clock pulse wheel inside motor >direction/& speed of its rotation

if u start doing a lot of Enlarge or Reduction copies > u will have that noise issue return

Replace the Motor if customer plans to use that function

That glue thing is old hat/ Motor is cheap>
point to note> when replacing motor>Without detaching the motor unit, mark/scribe its position of the rear side plate> that way u will have correct position when attaching belt to pulley on motor


M1.JPG
The motor driver operates in response to signals from the CPU to turn on/off the scanner motor or to control the direction/speed of its rotation

Moving the Scanner Forward for Image Scanning
[1] Acceleration area: accelerates to a speed suited to black-and-white/SEND
mode or full-color mode
[2] Approach speed area: allows a margin of acceleration (approach run) to ensure
stable speed
[3] Reading image area: reads images at specific speed (if black-and-white/SEND
mode, twice as fast as in full-color mode)
[4] Deceleration area: decelerates after the image trailing edge for a stop

The scanner is moved at the following speed to suit the selected mode:
• in full-color copy mode, 117 mm/sec.
• in black-and-white copy/black-and-white SEND mode, 234 mm/sec
• full-color SEND mode, 234 mm/sec (300 dpi or less);
117 mm/sec (more than 300 dpi)


Moving the Scanner in Reverse for Image Scanning
After scanning an image, the movement of the No. 1 mirror base to the shading position is controlled at a speed twice as high as it is moved to scan an image regardless of the color mode.

[Canon.Tech]

Re: C3220 Copy/Scanner problem

I also have this issue on an irc2620 the machine has recently been moved. I went there but could not fault the machine, but from the copies my customer showed me it looks like the scanner has been sticking or not going to the home position etc, but no error codes!? Does someone have the part number for this "fly wheel" I will order one & go back & replace it next time I'm there.

[vigour]

Re: C3220 Copy/Scanner problem

The flywheel only comes with a new motor

[Canon.Tech]

Re: C3220 Copy/Scanner problem

Ok, thanks i'll just order the motor. How easy is that to replace?

[teckat]

Re: C3220 Copy/Scanner problem

Ok, thanks i'll just order the motor. How easy is that to replace?

=====================

see pdf--Scanner Motor.pdf

[Ron314]

Re: C3220 Copy/Scanner problem

This might not be related but I have had 2 incidences of this era of stepper motor having weird problems. The problems both turned out to be that one of the long screws that hold the motor together had rattled loose and had jammed up the motor periodically. Just for the heck of it you might tear the motor apart to check this and if so locktite it when done.

314159265

[Fer]

Re: C3220 Copy/Scanner problem

I just pull the magnetic wheel from the motor en clean the 2 white plastic disks, with alcohol and a piece of paper. Make sure they don;t stick to much, the magnetic disk needs to slip allot when the motor changes rotation direction.