What happens to your U01 file
Every needle point lands in the same place in the VP3 file as in the U01 file, and Hoopbench reads the new file back to prove it before you save it. The details below are what actually changes between these two formats.
| Stitch positions | Identical, to 0.1 mm |
|---|---|
| Colour stops | Same number, same order |
| Thread colours | Choose them first |
| Size and density | Unchanged |
Thread colours
U01 stores no colours, and VP3 keeps exact ones. Set your own under Colour stops before you download, and they are stored exactly as you pick them, along with any names you type.
Long moves
Both formats move at most 12.7 mm per record, so nothing needs splitting.
Trims
VP3 has a real trim command, so cuts carry across as cuts.
Before you stitch
- Open the .u01 file above and watch it sew, so you know the file is sound and in the order you expect.
- Choose your hoop under Hoop fit. The check uses the design's real size, not the file's header.
- Pick your thread colours under Colour stops, because U01 doesn't hold them.
- Download the .vp3 file, and stitch a test piece on matching fabric and stabiliser.
Converting doesn't resize a design or change its density. If a design needs to be much bigger or smaller, use digitising software, as stretching stitches without recalculating them can leave gaps or heavy spots.
About U01
U01 is the Barudan format. It has a 256 byte header, then three bytes per record, and it selects needles by number rather than storing colours.
Thread colours and names. Which thread sits on which needle is set up at the machine.
About VP3
VP3 is the shared format for current Husqvarna Viking and Pfaff machines. Each colour block stores its own start point and a full thread record, including the colour, catalogue number and description.
The VP3 file is for current Husqvarna Viking and Pfaff machines and their software. Viking and Pfaff machines that read VP3.
It keeps the most thread detail of the common formats, so it is a good one to convert from when you want the colours to survive.