DIY Digital Caliper Micrometer Comparator

Step 5 How to Mount Lumpy Objects

Flat objects can just be placed on the scanner glass.

But a round or lumpy object like a small bolt or screw should be fixed in place.

I use a LEGO brick and some Blu-Tack poster mounting putty.

I place the LEGO brick on the center line of the glass at the bottom of the scanner glass.

This gives the best lighting angle with the fewest shadows.

You'll have to experiment because all scanners are different.