Question about M92

[Electromente]

I have a question regarding the M92_XYZ57_E48.gcode , I know my printer is older than 2018, and when I flashed with factory firmware, always review if my printer is 1/8 or 1/16, but once started to use Marlin I've never have corrected the microsteps again, (because I've forgot it).

What is the behavior or improvement that I should observe when using the correct parameter?

The question is related to understand what I should see/review to know if it has gotten better or worse something in the printer after apply it.

NOTE: Now the printer is working almost fine with a little leveling issues in the most external side of the bed.

[BackwardEcho]

The wrong M92 would be really obvious if you chose incorrectly. It would either go too fast and jam into the build surface when doing a G29 probing, or it wont even get there. Any improvement would come from using 114.28 or 114.29 for dimensional accuracy. Something to do with how the firmware rounds numbers giving us the 114.28 when I hear 114.29 is the actual number. You can get the height of a print to confirm if you want/ need the .29 or .28 if you've already adjusted the XY accuracy another way.

[aegean-odyssey]

@BackwardEcho provides a good answer. Converting this issue to a discussion and closing.