I 'm very new in PCB designer CAD. I have a simple PCB design in Altium which I need to create gerber and drill files before sending it to a milling machine. When I go to:
Files-->Fabrication Outputs-->Gerber Files
Here I need to select one of the formats from 2:3, 2:4, 2:5 as below:
But I cannot decide which format to chose. How can I figure out what my resolution is and how can I associate it with these formats?
Edit: I found only this info:
If you are using one of the higher resolutions, check that the PCB manufacturer supports that format. The 2:4 and 2:5 formats only need to be chosen if there are holes on a grid finer than 1 mil.
What does it mean "finer than 1 mil" ? I use mm. I have holes on the PCB but when I double click on them it shows hole size and location in mm not the resolution. How can I figure out the resolution?