X y axis parameters for neje 3 pro

Hello please could someone told me the parameters of x y axis for neje 3 pro a40640 400x410mm? Thanx

Neje published numbers for $100, $101 and $110, $111 on their website.
It’s about a third of the way down in an image capture.

These feel optimistic, I don’t have a Neje device, so I can’t confirm.
You may need to test to see if steps are skipped and motion is lost.

It is also customary to reduce the work area from the advertised value by 5mm so the engrave head can retreat from limit switches when homing. This improves repeatability.

The fast way may be to use Neje’s GRBL firmware update tool as it should offer the correct initial settings for their machine.