Blank labels on Zebra printer using ZPL


Hi,

 

I have a problem with blank labels using ZPL from iOS application to print the label.

We use printer QLn 320 Zebra with firmware V68.19.7Z, non-continuous media with gaps.

 

The printer prints one required label and two blank labels when I use the ZPL command:

 

^XA^MNW

^LH20,20^POI

^FT5,5^FH^A0N,30,30^FDLine1^FS

FT5,45^FH^A0N,30,30^FDLine2^FS

^XZ

 

If I change printer settings and define label length with command:

 

^XA^MNN^LL200^XZ^XA^JUS^XZ

 

and use the following ZPL to print the label

 

^XA

^LH20,20^POI

^FT5,5^FH^A0N,30,30^FDLine1^FS

FT5,45^FH^A0N,30,30^FDLine2^FS

^XZ

 

The printer prints labels with correct size and doesn’t print blank labels.

 

So as I understand the problem with auto detection label size.

 

Could you advice what can be the reason?

Anonymous (not verified)
Hi Dmitrij,The issue here is

Hi Dmitrij,

The issue here is definitely detection of label length.  The ^MNW command only tells the printer that it should expect labels, not how long they are.  The printer will still have a default label length it will be looking for.  The ^MNN^LL commands effectively tell the printer that you have continuous (receipt) type paper, not labels, so it will eventually be wrong.  The command to tell the printer to auto-detect the label length is "~JC" without quotes.  It does not need to be in a print format as it is an immediate action command.  It will waste 2 labels in order to get the detection complete, but then you should be fine until you change to a different type of label stock.

Robin West

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Dmitrij Burakov...
Thank you Robin,Your answer

Thank you Robin,

Your answer helped, now it's working.

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