Horizontal lines on print Canon Pro 1000

[ERMU]

beginning of printend of printbeginning of print

When I print on format A2 I get horizontal lines at the beginning and end of the print, the first and last 5 cm of the print, see photos. In between the print is perfect. The paper I use is Canson Baryta photographique II 310 g/m2 and totally flat before use. Nozzle check pattern is OK, prevent paper abrasion is on, vacuum by default is on. 

Does anyone have an idea what it could be? 

[OldPrinter]

themagiceight— –

Yes I recognized that after I posted my photo of my symptoms.
Mine is a sort of fading away of *some* of the inks,
in a soft-edged band running parallel to the movement of the print head,
starting about 8 cm from the edge of the A3+ sheet of semi-gloss paper.

I should perhaps start a new query thread for what i am seeing.

thank you

[MichalMazur]

How is the situation here?

I and many others experience very similar problems with pro 1100. Canon already replaced many units and all experience the same problems. I just got my replacement and I’m so devastated.

[themagiceight]

"Pause between scans" seems to be the relevant setting. At 5 seconds, I don't get horizontal lines. Of course, this is a disappointing fix since it massively increases print time.

My guess is there's a design flaw in the pro 1100 and all units are affected more or less to the same extent. I'm on printer #3 after two RMAs -- they all do it

[MichalMazur]

Thank you very much. Based on the description of this function I have no idea how this influences that type of banding but... I gave it a try and it actually worked. It was late, so I just tested 2 prints but I will test more today.
Fortunately I'm home/hobbyist photographer and I do not need to print some number of prints in specific period of time but it might really be a killer for professionals.

[faneuil]

Last night - while reviewing the service manual - I discovered the existence of the "timing slit disk"
Over the years, overspray of ink had gotten all over mine. Several cleanings with q-tips, pads and windex fixed it
Did a recalibration of line-feed (in the media config tool) and banding was GONE!

[faneuil]

This celluloid-like calibration disk had huge clots of ink on it.
Which explained why the line feed banding was occurring in regular intervals - as the obscured portions passed under the sensor, the printer could not calibrate it's feed

Fortunately, I did not have to take the printer that much "apart" - Just the left side panel and I could access the disk via port holes with swabs (I used lens sensor swaps soaked in windex) on both sides of the disk