new simple 8x4 router

[rob gib]

drawn using google sketch up, the free version doesn't export in dxf if anyone wants the .skp file please email me at cnc_automation@hotmail.com also 2d dxf is availiable if required

[blau_schuh]

Wow, nice job. I installed sketchup a while ago, never thought to try and use it to plan out a cnc!!!

just emailed you...

[andy_ck87028]

imo a single central leadscrew for a 4 foot gantry would not work.

I think you will have racking problems even if the gantry is built with a balsa torsion box.

What do others think?

Andy

[project5k]

well i dont know for sure yet, but i'm planning to run a central single screw and my gantry is 61 inches wide.... but i'm also building mine totally outta steel... so there is considerably more rigidity than one made of wood...

[Madclicker]

Originally Posted by andy_ck87028 imo a single central leadscrew for a 4 foot gantry would not work. I think you will have racking problems even if the gantry is built with a balsa torsion box. What do others think? Andy

I built a 65" OA wide gantry driven by a single center screw.

I made mine using torsion boxes made of MDF, hardboard, hardwood and phenolic laminate. It has a full 50" cut and works extremely well. I have another screw/motor/bearing set I was going to use for twin screws if the single didn't do the job, but I won't need them on this machine.

[rob gib]

will try single, can always rethink after

[project5k]

thats what im thinking on mine, i'm hoping that i can get some more donw on mine the nest couple days off i have.. i'm gonna try a single centered, and then if im not happy i can allways pull that one off, move it to one side, and add a second on the other side....