The O1 Omni is a four-in-one machine, and the UV side of it is the part most owners underuse. Usually because they are feeding it the wrong blanks.
Here is what works, and why.
Three rules before any product list
Flat beats contoured. The Omni can handle shaped objects, but flat is where it is fastest and most forgiving. A flat blank means no height calibration drama and no soft edges where the surface falls away.
Rigid beats flexible. Anything that bows lifts off the bed in the middle and your focus goes with it. Ceramic is excellent here. It does not flex, full stop.
Bright white beats "white." If the substrate is off-white you will end up laying down a white ink pass to get clean color. That is an extra layer, extra white ink, and extra minutes per piece. On a bright white base you print color straight down.
Everything below follows from those three.
The blanks worth stocking
Ceramic coasters. 4 inch round or square, matte UV coating, cork already on the back. Flat, rigid, bright white. The single best starter blank for this machine because the output sells for $10 and the blank costs $2.
Ceramic magnets. Six shapes from 2 to 2.75 inches. Small enough that you can gang a lot of them in one pass, which is where the Omni starts paying for itself.
Ceramic ornaments. 3 inch round with the hole already drilled and the string included. Seasonal, high margin, and you are not sourcing cord separately.
Car coasters. 2.6 inch with a finger notch. Same setup as the magnets, different market.
Ganging is the whole game
This is the part that separates people who like their UV printer from people who make money with it.
The Omni's bed will hold a lot of small blanks at once. Printing twelve magnets in one pass is not twelve times the work of printing one. It is one setup, one file, one run.
To do it well:
- Build a jig. Even a laser-cut piece of scrap with recesses for your blanks beats eyeballing it. Cut it once, use it for a year. A hole-grid mat system makes this repeatable if you print a lot.
- Keep heights identical. Only gang blanks of the same thickness in one pass. Our magnets are all the same thickness for exactly this reason, so you can mix shapes freely in one run.
- Lay out the file to match the jig. Once, saved as a template. Then it is drop in, load file, go.
- Print the whole bed, not a corner. The time cost is in setup, not travel.
A dozen magnets ganged is roughly the same wall-clock time as three printed one at a time.
Settings starting points
Every machine and firmware is a bit different, so treat these as a place to start rather than gospel.
- Height. Set off the actual blank, not the bed. On a 0.16 inch magnet that difference matters.
- Passes. One pass on a coated bright white substrate is usually enough. If colors look weak, the problem is more often the white base than the pass count.
- White ink. On a genuinely bright white blank, skip it. Check your software is not adding it by default, because many profiles do.
- Varnish. Optional on coated ceramic. Worth it on anything going in a car or getting wiped daily.
Run a test tile with a solid mid-gray, a saturated color, a skin tone and 6pt text before you commit a batch. Those four catch nearly every problem.
What not to bother with
Anything that flexes, anything with a deep curve, and anything whose white is not actually white. You will spend your time fighting focus and white ink instead of printing.
Start flat, rigid and bright white. Expand once the money is coming in.
