I have made several more versions of the 1mx1m design and ultimately made it a little smaller and a lot more rigid.
Removing the long legs will make the frame much more rigid, as will the extra side bracing and the internal panels, that are primarily there to catch the dust.
The X axis is now a length of 80x160mm aluminium profile and in total we probably now have around 6-700mm of X travel and about 1m of Y travel.
Here is a closer look at the Y axis rack and pinion drive:
And here is the X axis drive:
Both are direct drive, but hopefully 4.1Nm steppers running Bipolar parallel wiring should be strong enough as well as fast enough for this router.
The Z axis is lead screw driven, this will probably be a trapeziodal TR12-3 thread with a delrin/acetal nut.
The whole Z axis slides up and down on a 100mm wide steel plate and then has a 40x80mm aluminium profile attached to it for mounting the router.
The X axis moves on 2 lengths of 75x5mm flat steel.
The Y axis being the rack bolted through the same 75x5mm steel to the Unistrut frame.
The 4th axis shown is actually the one I have designed for my Mini Mill, that uses the original 3MT spindle from that came with the mill before I replaced it with an R8 one.
