CNC/3D too ambitious?

[brumster]

I would think so. Like I say, I'm new myself to the CNC machining side so no experience there, but I've run a RepRap Ormerod 2 for over 12 months now and love it. You're not talking massive requirements in terms of resolution; your average layer height with PLA on a 0.5mm nozzle is around 0.24mm, with the first going down thinner at maybe around 0.15mm... so pretty easy resolutions for your Z axis to make. The X and Y are in a way less critical because obviously you're laying material down, so you're just trailing the filament out onto the bed or previous layer. The tuning is really to do with extrusion and axis speeds, temperatures and so forth, but again by CNC standards you're in easy territory... you're unlikely to push more than 40 to 60mm/s on print moves (depending a lot on nozzle size, temperature, material, etc)...