levelling machine

[sam123]

Do you need to level machine and then put soil board and resurface? or just resurfacing soil board will be enough. My mache is on stems and not perfectly level. I used laser level to check

[Jim Becker]

You want it reasonably level or at least shimmed so that there is no rocking. Steel and cast iron can and do bend from weight and stress, to you want your machine to be "planted" so that cannot happen. Any deflection may be minor, but with CNC work, minor isn't necessarily "minor". With a new machine, you'll also want to tram the spindle to be sure it's cutting parallel to the spoilboard in all directions.

[rcrawford]

Perfectly level does not really matter, but being perfectly stable does matter. After that, just surface your spoilboard. Doesn't matter if the material under the spoilboard is level or not, the top of your spoilboard will be level (or at least parallel to your X and Y axis rails) once surfaced.