Question Is my Z axis inclined?

After surfacing my support board with a 20mm flat bit there are micro-steps all over the surface. Is the Z axis inclined or what's going on?

How do you fix this?

I've heard that it's a good practice to machine both X and Y. This is only the X direction.



Also, as a bonus, my extremelly cheap and ugly dust solution made from a bottle of water:

Not tried it yet but this guy really knows his stuff!

I'll be trying this next week - love the dust extractor, my Stepcraft HF extractor keeps blocking.

Hal

I did that, a big pocket operation at 0.25mm depth with a 20mm bit like this:



But I suspect my mount is a bit deviated from 90º.