I read the info on engraving trays, educational.

The only suggestion I would have is instead of engraving on air, use 3 layers of Scotch tape or a single layer of the clear vinyl transfer tape. Unscrew the drag pit and use a faint bit of finger pressure on the bit.

This will give clear lines exactly where the bit touches and not leave any mark on the product.

My wife came up with the transfer tape. It is tougher than the Scotch tape and also leaves a good line. It can also be bought in many widths, a major bonus.

Philadelphia, PA (Really Bensalem)

When you finally understand it completely... it changes.

Yes that is a good idea Harvey, especially useful when engraving something like a gallery tray (you may not have these) silver trays with a rolled pattern and an oval clear patch in the centre. Getting it lined up can be tricky.
Another way, especially if the text is long, i.e. 5 or 6 minutes, is to save the layout, then delete the text, put a single letter in each corner of the top and bottom line, then set the machine running. You can see the four corners "engrave" and judge its position.

regards

Simon Cork
Sheffield Uk