Print Test Page prints test label followed by blank pages and media becomes misaligned

[tarikjn]

Printer: Zebra ZD420 203dpi DT Driver: zpl_4inch-203dpi-dt Paper: 4 x 6

Print Test Page feature from the web server prints a test label followed by 4 blank pages at normal speed and ~2.25 blank pages at slow speed. After this, the media alignment must be reset.

This also happens intermittently with other documents but seems to be consistently reproducible using Print Test Page.

This issue is not present using macOS 13.1 built-in CUPS driver.

[michaelrsweet]

What version of LPrint are you using?

[michaelrsweet]

Closing for lack of response; will re-open as needed.

[tarikjn]

Apologies for the delay -- I recommend this issue be re-opened as it is reproducing consistently, even after having upgraded to 1.3.1 stable (previous version was 1.2).

Here is what I have so far:

1. printing first time with the lprint driver will spit out the print followed by ~6.1 empty labels. 3 will feed fast, 3 feed slower
2. printer then seems to then be in "error" state, gets out of it by opening and closing or restarting it
3. the feed is subsequently misaligned by a few millimeters, enough to mis-tear labels
4. the following actions will send you back to 1.:
   • restarting the printer
   • going through the printer realignment process

Some notes:

• issue never seen with macOS CUPS driver
• I upgraded from a prior version of lprint to 1.3.1 by running the macOS installer

I'll keep an eye on this thread to try respond quickly to any further details that may be needed.