desktop-packages team mailing list archive

[Phil Pemberton <1439895@xxxxxxxxxxxxxxxxxx>]

The patch which fixes it for the QL-550 is debian/patches/foomatic-data-
fixes.patch, already in repo, extract below:

---
--- a/printer/Brother-QL-550.xml
+++ b/printer/Brother-QL-550.xml
@@ -28,7 +28,7 @@
     <resolution>
       <dpi>
         <x>300</x>
-        <y>300</y>
+        <y>275</y>
       </dpi>
     </resolution>
     <consumables>
---

The issue is mentioned in passing in this Debian bug:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=555892 (search for the
text "275 dpi", message 5 by Lars Wirzenius).

I found another patch at https://github.com/mgrela/dropzone/blob/master
/net-print/ptouch-driver/files/ptouch-driver-1.3-fix-dpi-for-QL5x0.patch
which seems to do a much more comprehensive job of fixing the issue -

 * Makes a lot of changes to opt/Brother-Ptouch-Resolution.xml, the effects of which I'm not 100% sure about
 * The same 300dpi -> 275dpi patch we have on the QL-550, but applied to the QL-500 too.

I intend to test this on my QL-500 later today.

Brother only quote the "300dpi" figure, which is the resolution of the
thermal print head. If all else fails, I can put together a PDF label
with identical content, print it on Windows and with ptouch-driver and
compare the bitmap data and see what we're getting wrong.

** Bug watch added: Debian Bug tracker #555892
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=555892

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https://bugs.launchpad.net/bugs/1439895

Title:
  QL-500 prints past end of label

Status in ptouch-driver package in Ubuntu:
  Incomplete

Bug description:
  The QL-500 label printer prints past the end of the label in the
  vertical (direction of feed) direction. This means that when you print
  e.g. an address label and use the label cutter, several things happen:

  1) Because the printer has printed past the end of the label, the head is positioned part-way into the next label
  2) Because the head is positioned part-way into the next label, the optical alignment sensor cannot see the black alignment marks on the back of the labels. This causes the printer to flag an alignment error when you next try to print a label.

  The effect is you can only print one label at a time.

  There is a patch included which reduces the Y resolution of the QL-550
  printer to 275 dpi. It seems like it may be necessary to extend this
  to the QL-500 too.

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