I see, slowly getting more knowledge on this, do you think my motion speed is a tad slow as ive set it to 400?

I got the motors up to 2500 but they were making some mad noises and defo didnt like it.

Also in the estlecam software i cant set the z exis depth to a - value. I have it set up so that if I want to engrave 4mm deep the cutting depth is -4mm but it seems to only like positive values?