Re: [Gimp-print-devel] Canon Pixma IP6220D

[Gernot H. <aik...@gm...>]

On Wed, Feb 23, 2022 at 10:43 PM Kent Sullivan <ken...@gm...> wrote:

> I am trying to convert my old printer to a network printer.
> I'm hosting CUPS on a Raspi, (I believe the model B)
>
> CUPS seems to be working as I can find the printer from another machine on
> the network and print a page to it.
> However:
> When printing in color I'm getting a full width page in color (although
> the colors are way off) and a b/w half width page, On The Same Page
> (overlayed)
>

Hello Kent,
Colour are going to be way off as virtually none of the Canon printers have
any calibration available.
It sounds like colour inks are working correctly, but blac is not-I presume
you are saying black is somehow compressed.
That sounds like a fairly simple correction to the encoding, although I
thought this had been sorted out in the past.
I believe there is no black/white mode, only colour modes are available for
printing, so this means the black channel in the inkset used.

These are the plain media modes available for plain paper, containing black
ink channel:

  /* plain modes */
  {  600, 600,CANON_INK_CcMmYKk,"600x600dpi_high",N_("600x600 DPI
HIGH"),INKSET(13_C4M4Y4k4c4m4),16,MODE_FLAG_EXTENDED_T,NULL,1.0,1.0,NULL,NULL,NULL,3},
  {  600, 600,CANON_INK_CMYK,"600x600dpi",N_("600x600
DPI"),INKSET(13_C3M3Y3k4),16,MODE_FLAG_EXTENDED_T,NULL,1.0,1.0,NULL,NULL,NULL,2},
  {  300, 300,CANON_INK_CMYK,"300x300dpi",N_("300x300
DPI"),INKSET(13_C2M2Y2k2),8,MODE_FLAG_EXTENDED_T|MODE_FLAG_IP8500,NULL,1.0,1.0,NULL,NULL,NULL,1},
  {  300, 300,CANON_INK_CMYK,"300x300dpi_draft",N_("300x300 DPI
DRAFT"),INKSET(13_C2M2Y2k2),8,MODE_FLAG_EXTENDED_T|MODE_FLAG_IP8500,NULL,1.0,1.0,NULL,NULL,NULL,0},

The 2nd one "600x600 DPI" would be the default so if you are not setting
the resolution mode that will be the one you are printing with.
Can you please check all 4 of these modes (select their names as per the
N_("...") string) in CUPS when you print.
I need to confirm which of these modes have problems with the black
channel, and possible with other colour channels (e.g., if some colours
print in compressed or extended fashion).

When printing in b/w I was just getting the half width page in b/w.
>

As there are no black-only inksets defined for this printer, I presume you
will get the same result with the black channel if you are printing colour.

Other things to note, the prints are also very slow in comparison to
> plugging in the printer and using whatever the default driver was before I
> went on this endeavor.
>

I cannot speak for the performance of gutenprint over the Canon printer
driver or whatever you may have been using before.


> I haven't tried photo printing yet as I don't have high hopes but I'll
> throw it out there just in case. The printer had a program "Canon
> Easy-PhotoPrint EX" that I installed on my windows machine that let you
> choose what type of photo paper and many photo layouts we wanted to use. I
> used this to print my photos but perhaps the native driver would have
> worked just as well for photo quality prints. (This printer uses CL41 ink
> for color printing and CL-52 for photo ink so I'm not sure if it needs
> specific controls in order to use the photo printing) Do you think the
> Gutenprint driver would enable this type of printing?
>

Not in one software, no.
gutenprint Canon driver only supports the media types (different types of
photo media) in the same way as the Windows driver does. For each media
type there are a select type of named resolutions available with specific
defined inksets (like the ones for plain media above).
However, none of these resolutions has been calibrated, so the output will
be very poor unless you spend time creating some calibration in CUPS
channels.
For the photo layouts, you would need some other software to prepare as the
input to the CUPS filter chain.

Cups 2.2.1 Gutenprint v5.3.1
>

Best regards,
Gernot Hassenpflug