How to choose the correct scan gap

It makes no sense to choose the highest possible DPI, if your laser point dont matches the size of the scan gap.
You can make a dot and measure your laser beam, or you can just use safe values which we marked green.

0.20127
0.19134
0.18141
0.17149
0.16159
0.15169
0.14181
0.13195
0.12212
0.11231
0.10254
0.09282
0.08318
0.07383
0.06423
0.05508
0.04635
0.03847
0.021270