Actually, IMO, your response still indicates that you expect others to do your work for you. If clarification of that is needed, consider:

printing your barcode labels to the particular printer is your project; not ours; not Google's or Bing's or Yahoo's; not Brother's; and (repeat not ours. PM exists to help folks (who help themselves) learn Perl; not to solve incidental and OT problems like attaching a printer.

For example, you say you telephoned Brother. Why not search the web for the manual and find at least some of your answers there. Feeding Google the search terms "Brother QL-570 manual" will produce any number of hits... the first of which (after the paid ads) are:

1. Professional Label Printer | Office – Brother QL 570 www.brother-usa.com/labelprinter/modeldetail.aspx?...QL570 - Cached Brother International in the United States - At Your Side. Global Site ... Why a Brother? How do I use it? Features Buying Guide · Applications · Register for updates ... Brother QL-570. Professional Label Printer ... Specifications - Supplies & Accessories
2. PDF Brother QL-570 Label Printer Manual - CompUSA static.compusa.com/pdf/Brother-QL-570-Label-Printer-Manual.pdf File Format: PDF/Adobe Acrobat - Quick View About This Guide. 3. Introduction. The Brother QL-570 label printer (hereafter referred to as "the machine") enables you to quickly and easily ...

And why are you letting an assumption (almost certainly incorrect) -- namely, that sending data to a USB printer from Perl requires somethingthing more arcane than sending data to any other printer -- stand in the way of checking that manual and your OS documents?

Officially, this isn't a 'No Whine Zone'... but doing so tends to produce less satisfactory results than obtain when you read and consider implementing the suggestions -- implied or otherwise -- from respondents.