UPDATE:The 21 step.XL file works now on mac, so I re-entered the data and made a new .txt file. Now when I drop it and the .quad file to be modified onto the QTR-linearize app, it generates the -out.txt file and a quad-out.txt file, but no new .quad file. Attached are the .txt files in question.
thanks
I’ve successfully flushed and installed the PZ-DN carts in my 3800 and successfully printed images and step wedges. However, the stock curve is off more than I expected, so I followed the directions for printing and scanning a 21 step wedge, noting the vales in the Excel file, cutting and pasting the values from the CGATS page into a new excel file and saved it as a tab delimited text file. I’ve dragged both the new .txt file and the .quad file that I want to modify over the QTR-Linearize app, it clicks and whirs and creates a the new Quad-lin file and a -out.txt file, but the newly modified quad file isn’t recognized as a quad file. The mini icon to the left of the file name is blank. I’ve attached the .txt file, the -out.txt file, and the new non-working .quad file.
Oh. Sorry, I see what you are doing. With the 21step scanner tool data, you pulled this over the wrong dropout. You want to pull the .quad and the .txt over the QTR-Linearize-Quad droplet, not the QTR-Linearize-Data droplet.
I built a new .quad based on your linearization txt and installed it. (I just used some random .quad). It works perfectly. The only thing I can think is that your .quad has some character in its name that is messing up QTR.
Aha. I didn’t realize that the printer needed to be re-installed. I did that and the new curve now appears in the print dialog box. I went back and checked the deluxe manual on Page 86 that I referenced for this linearization process and I don’t see any mention of re=installing the printer. It might be a good addition to the next update.
You seem to be trying to linearize your densities of film instead of the printed densities on a darkroom paper. Density is a LOG value so it should actually not me linear to make a good print, and anyway PiezoDN works off the printed densities in L* values.
This has tripped up a few people in the past. PiezoDN works off of printed darkroom patches, not film densities. In that way it’s incredibly more fine-tuned and also simple.
I just did it again onto the QTR-Linearize-Quad droplet and the same thing happened as when I originally wrote to you. The newly generated -lin.quad file does not appear to be legit. Attached are the text files in question. I can’t send you the new ,quad file as I get a message that it is not valid.