Brother RuggedJet RJ3150Z1 Online User's Manual page 21

Setting Up the Printer
c
While lifting up the roll guide adjustment lever (1), push in both roll guides (2) to the roll width.
Make sure that the RD Roll is positioned straight in the RD Roll compartment.
d
Close the RD Roll compartment by pressing down on the centre of the cover until it latches.
Note
When using die-cut labels (RJ-3150 only), press the
will position the label to the correct starting position.
Important
Use genuine Brother paper.
(Feed) button after setting the RD Roll. The printer
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