Fix QR Code dimensions (height and width) in ZPL

Question

I am printing a QR code on a small label.

The amount of data in the QR code is variable. The printer (e.g. Zebra GK420d) changes the size/dimensions of the QR image based on the amount of data being embedded.

Example ZPL:

 ^FO38,2400
 ^BQN,2,10
 ^FDMA,http://ghospitals/gp/index.php/patient/120704^FS

The QR code size should be fixed. An increase in data should increase the density not the size!

How can I restrict/define the dimensions of the printed QR code?

Thanks for your help.

Answer 1

I was experimenting with that for some time. I don't think that is possible to fix dimension when you are using zpl II script instead generate image from QR an scale it to that dimension.

If you won't use QR as image try to manipulate with magnification factor. From doc :

^BQa,b,c,d,e

c = magnification factor

Accepted Values: 1 to 10
Default Value: 
1 on 150 dpi printers
2 on 200 dpi printers
3 on 300 dpi printers
6 on 600 dpi printers

So In your case insted :

^BQN,2,10

use

^BQN,2,9

or less.