ZPL7003 — Print speed above the model's maximum

^PR sets a print speed higher than the selected model's published maximum at this resolution. The ZPL manual is explicit that the printer accepts the value and prints at its own maximum, so the setting has no effect: it does not make that printer faster. Letter codes count too (A=2, B=3, C=4, D=6, E=8 ips). Speed limits come from Zebra's spec sheets and user guides for each model.

Label that triggers it

^XA^PR12^FO50,50^A0N,40^FDHELLO^FS^XZ

This finding depends on the selected printer model, not on the code alone. The API call that produces it:

curl -X POST "https://api.labelixa.com/v1/diagnostics?model=ZQ521&dpmm=8" \
     --data "^XA^PR12^FO50,50^A0N,40^FDHELLO^FS^XZ"

Finding: ZPL7003 · line 1:4 — ^PR print speed 12 ips exceeds ZQ521's maximum (5 ips) — the printer clamps it to its maximum and does not print any faster

How to fix it

Set ^PR to the model's maximum or lower. Lower speeds often give darker, sharper barcodes on direct thermal media. The example is clean with ^PR5 on a ZQ521.

Corrected label

^XA^PR5^FO50,50^A0N,40^FDHELLO^FS^XZ

The same label is clean with this call:

curl -X POST "https://api.labelixa.com/v1/diagnostics?model=ZQ521&dpmm=8" \
     --data "^XA^PR5^FO50,50^A0N,40^FDHELLO^FS^XZ"

Related rules

ZPL7001 Model does not print at this resolution · ZPL7002 Print width exceeds the model's printhead

In CI

npx labelixa validate "labels/**/*.zpl" lints your files and prints this page's address next to each finding. /docs/cli

Lint your ZPL now