If you notice that there is a lot of excess paper (very long blank space that is more than 2 inches) being sent out by the receipt printer before it actually prints the receipt contents, then this might be due to the type of receipt printer you are using.
When being used with PrintNode, some older receipt printers cause a very long blank section before the actual contents.
To fix the issue, go to the Tools menu inside the Printus Settings and turn on the Print Length Fix option and save your changes.
Once done, head over to the PrintNode client and go to the Printers tab and change the Engine to Engine 6.
Test out another test print and it should now work fine.
