Digitizing
Digitizing is turning artwork into a stitch file, the list of needle positions, stitch types, thread colors and trims that an embroidery machine follows.
Digitizing is the job of turning artwork, such as a logo or a drawing, into a stitch file an embroidery machine can sew. The file is a list of needle positions, stitch types, thread colors and trims. A JPG or PNG is only a grid of pixels, so it cannot be stitched until someone, or some software, decides where every stitch goes.
It matters because the digitizing decides how a design looks and behaves on fabric. Each shape gets a stitch type: running stitch for outlines and travel, satin for narrow shapes and lettering, and fill (also called tatami) for large areas. The digitizer also sets stitch direction, density, underlay and pull compensation, and plans the sewing order, the connector stitches, the lock stitches and the trims. Two files made from the same logo can stitch very differently, one smooth and one puckered.
Most digitizing happens in software. Full programs offer editing tools and often an auto-digitize feature that drafts stitches from an image in one step. Ink/Stitch is a free, open-source option where you start from closed vector shapes and then set parameters such as stitch length, angle, row spacing, underlay and pull compensation for each one. Treat any automatic result as a first draft and expect to edit it. You can also pay a digitizer: send vector artwork or a large, sharp image, the finished size, the fabric and the format your machine reads.
A stitch file is built for one size and one kind of fabric, so adjust with care. Some file formats do not recalculate stitch counts when resized, and one maker's support guide suggests keeping size changes within about 20 percent. Bigger changes call for re-digitizing. Thread weight matters too: Madeira notes that density has to be adjusted when the thread changes, and the needle size may need to change with it. Always stitch a sample on the same fabric and stabilizer as the real job, and change one setting at a time so you know what fixed it.
Common mistakes: expecting auto-digitizing to handle tiny text or photo-style art, stitching a design made for sturdy canvas on a stretchy knit, enlarging or shrinking a file a lot without re-digitizing, and mixing up digitizing with converting. Changing PES to DST swaps the file type but does not create or improve stitches. Also check hooping and stabilizer before blaming the file for puckering.
Example: A company logo about 3 in (75 mm) wide arrives as a PNG. In digitizing software the round outline becomes running stitch, the letters about 0.16 in (4 mm) wide become satin, and the solid background shape becomes fill with underlay beneath it. The finished file is saved as PES or DST to match the machine. If the client later wants a 4.5 in (115 mm) version, that is a 50 percent increase, well past the 20 percent resize guideline, so the logo should be re-digitized rather than just scaled. These numbers are illustrative.
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Frequently asked questions
What is the difference between digitizing and converting an embroidery file?
Digitizing creates stitches from artwork such as a logo or drawing. Converting changes an existing stitch file from one format to another, for example PES to DST. Converting cannot add stitches or fix a design that was poorly digitized.
Can I digitize embroidery designs for free?
Yes. Ink/Stitch is a free, open-source tool where you build a design from vector shapes and set the stitch type and settings for each one. Expect a learning curve, and plan on stitching sample runs on scrap fabric before using a design on a real project.
Do I need to digitize to use my embroidery machine?
No. You can stitch built-in designs and purchased or downloaded stitch files without ever digitizing. You only need digitizing, or a digitizer, when you want to turn your own artwork into a design.