Using the edge of Routing Table as Linear Rail

[senojnayr]

Hi everyone - First post.

I've been lurking for months, brainstorming, studying various designs, and trying to figure out how to build a cost effective machine that actually works. I want to machine wood and light aluminum, and I want to build something 4' by 4'. I've looked at lots of designs, and I'm trying to design something based on the best from all of them, but with an eye towards cost.

With that in mind, why can't I use the edge of the routing table as the X axis linear rail?

I plan on having 2 layers of 3/4" MDF stacked together for the table anyway. I could see using aluminum stock on the edges to reinforce them from wear and tear. The gantry would clamp to the edges of the table with four nylon wheels on each side. Large diameter acme screws will drive each side of the gantry as well. I'm aiming for .01" accuracy on this one.

Any thoughts? Opinions? I'm thick skinned. Set me straight on this. Thanks!

[louieatienza]

Hi everyone - First post.

I've been lurking for months, brainstorming, studying various designs, and trying to figure out how to build a cost effective machine that actually works. I want to machine wood and light aluminum, and I want to build something 4' by 4'. I've looked at lots of designs, and I'm trying to design something based on the best from all of them, but with an eye towards cost.

With that in mind, why can't I use the edge of the routing table as the X axis linear rail?

I plan on having 2 layers of 3/4" MDF stacked together for the table anyway. I could see using aluminum stock on the edges to reinforce them from wear and tear. The gantry would clamp to the edges of the table with four nylon wheels on each side. Large diameter acme screws will drive each side of the gantry as well. I'm aiming for .01" accuracy on this one.

Any thoughts? Opinions? I'm thick skinned. Set me straight on this. Thanks!

I believe the "CNC Book" builds you see in the DIY section have aluminum angle attached right to the table edge. Only thing I see is that you need to get the table edges precise so that there is no slop in the X axis...