Hello,
Just did a test with my P600 and there is a difference. I ask a 40cm print and the P600 gives my exact 40cm printed area. However, my P900 gives me 39,9 cm. So I think I can conclude that there's something wrong with my P900.
Next problem : to convince Epson about this problem ;o)
This is very annoying because clients ask me a 60cm print and I struggle to print it exactly as asked...

Kind regards,
Koen

Hi Mike,

Thanks for your message. Qimage shows me the correct measures, so my guess is that it's probably related to my printer itself.
I still have my "old" P600 too. I will install it again and do the same test on it. I'll post my result here as soon as possible.

Kind regards,
Koen

Canvas will shrink along the length which is normal but I assume you are not printing on canvas.  If it still prints 40 x 59.8 even when you add 2mm, it sounds like you just have crop turned off.  When you hover your mouse over the print on Qimage's live view, what size is listed for the print?  Whatever size is listed there is the exact size that is being sent to the driver.  If you get anything other than that size, the issue lies either in the driver or with the printer.

Regards,
Mike

Hello guys,

I have a very annoying problem. When I print an image with size 40 cm by 60 cm the final print is 40 cm by 59,8 cm. The print size on the "with" length of my paper is always correct. However, in the "length" size for 60 cm I'm loosing 2 millimeters (and tested with 40 x 30 cm print too, here I loose 1 mm). I have tested with roll paper and sheets, same result. I'm using an Epson P900.
What's strange too : if I change my image size to 40 by 60,2 it prints me again a 40 by 59,8. Does anyone have an idea what's going on please ? Is my P900 struggling with paper feed ? Anyone same experience with this printer ?
This is very annoying because I can't print the exact wanted size of my photo's.

Not sure if it's related to the Qimage software but I'm wondering if it could be some setting overthere...

Thanks in advance for your help and greetings from Belgium !
Koen

Qimage doesn't care about anything but pixels in the image and how large you print.  If someone says they "enlarged" the image, they must have not added any pixels and maybe they just changed the embedded size because Qimage isn't trying to detect fake vs real pixels.

As to what you should tell people, that's super simple.  Just tell them to do anything they want with respect to editing but DO NOT under any circumstances resize the image or add/remove pixels!  Qimage will do a better job upsampling than Lightroom or Photoshop so just make sure the people submitting photos do not alter the pixel resolution of the images.  Qimage will take care of that at print time and it is important that Qimage know the original size (without any resizing or resampling).  If you add "fake" pixels with second rate interpolation like those in Lightroom or Photoshop, Qimage will assume those are real pixels and it defeats Qimage's interpolation algorithms.

Regards,
Mike

I've mentioned that recently I am printing contest-winning photographs (at 21x23") for excellent amateur photographers.  I then mount the photographs in a public outdoor exhibit gallery.   About 20-25 images/month.  ( I print all the images at the same size, so that I can efficiently frame and hang them with reusable parts.)

I use Qimage exclusively for printing (which means I don't know squat about printing from Photoshop or Lightroom, etc.).   I especially appreciate its assessment of what I'll call "real-pixel density" of the image file, relative to the size I am printing at.   Image files I get will vary from 40ppi to 300ppi.

About 15-20% of the images are Poor or Fair quality according to Qimage.  I have been going back to these photographers and asking them if perhaps they submitted a downsampled file for web use, etc.    They will do their best to send me a new image file -- sometimes the files will go from 100K to 30megs!   I guess they just ticked the box that said "superresolution" or such.    Somehow, Qimage knows that those aren't real pixels.   The ppi doesn't change.

Here are my questions:
1.  Some images seem to work ok at "poor" ppi -- the nature of the image may not be something that demands precise detail.   Are there some guidelines that might help me know when to work harder with a photographer to get a better image, and when to "let it go"? 
2.  Are there any tutorials on "preparing photoshop [or lightroom] image files for printing in Qimage" that I could offer the photographers?   A good number of them are not technically sophisticated, and just click on buttons with promising-sounding names.   
3.  How does Qimage assess ppi when the files have been "up-rezed" in PS or LR?  It seems to know that the pixels are made up!   How does it do that?  Just curious.
4.  Any other suggestions for me in helping these photographers?

My next idea is to do a workshop environment where the photographers who get it right look over the shoulders of the photographers who get it wrong -- and adjust their practice.   One workshop for LR users, one workshop for PS users, etc.    I don't know this stuff well enough myself to help them.

Advice appreciated.

If you were having issues, the issues were not with Qimage.  Qimage doesn't communicate with printers or drivers (that is the job of the OS) and it will work perfectly with any printer that offers a Windows printer driver including the Z3200, P900, and Canon Pro-4600.  Keep in mind that the AI Copilot driver features are designed to work with nearly all current Canon and Epson printers but there are a handful of exceptions where it is recommended that you turn all the AI Copilot features off.  I have no idea how the AI Copilot features function with the Pro-4600 as they are too new but suffice it to say if you have ANY issues at all, just turn those off and you can use Qimage like you would any other software: Lightroom, Photoshop, Affinity, etc.

Regards,
Mike

As I have previously communicated I have had my share of issues using Qimage with both my HPZ3200 (well known) and my Epson P900 (lesser known but still...). I am considering to purchase one of the new generation of Canon printers, probably the 4600. They seem to be more clog resistant, less troublesome and have more positive reviews than the large Epson printers. Does Qimage communicate reliably with the Canon printer drivers? I really don't want to face the same issues I have had in the past after shelling out bucks for a new large format printer. Please advise.

Glad to hear all's well.

I'm 60 miles SW of New Orleans.

Hurricane Francine in Sept, we were out for 2 days.

Hurricane Ida in 2021, we were out for 13 days.

Thanks guys.  Still without power but people within a few miles got it back yesterday so I have to hope we're close.  No internet so working on cell data backup.

Mike