Quote Originally Posted by shapebusters View Post
Thank you very much for all the help.

What do you think about something like this: Brian Oltrogge | Gr

2D/3D Surfacing on my DIY Platform CNC - YouTube
Again the Ganrty looks quite weak but more than that it use's V bearings, which are basicly just fancy skate board bearings, and pressed steel for Linear motion which isn't very good in my experience.
Problem comes from fine dust building up on the rails and collecting on the bearings which can lead to stalling motors etc if not kept clean. Even with good dust extraction I wouldn't use them has there will be wear issues with the thin Steel sheet which will mean regular adjustment.

When cutting wood, MDf etc dust it will be bad enough but with plastics it will be even worse has the static makes it stick to everything. If you look at the video you can see it starting to build up at the sides and you'll see they have built make shift barriers to contain the dust.

The linear motion is such an important area of a machine that cost cutting in this area always leads to regret in my experience. Company's do it to maximise Profit. DIY builders do it to keep costs down but it makes for a much poorer machine which ever reason.!!