Open source group project, anybody interested?

[Wotsit]

So how about a list of variables, so that we can discuss pros and cons?

(low-spec -> high-spec):
* Working size (min A4 -> max 4ft x 8ft flat sheet)(Z depth?)

For me 2 x 4 is sutable

* Linear bearings (unsupported rails -> skate bearings -> v bearings -> supported round rails -> recirculating ball carriages)

Supported round rails or carriages

* Drive method (chain/allthread -> belt/trap screw -> ballscrew))

Ball screw

* Target cutting speed vs. target resolution (trade-off)
* Rigidity & strength (just cut alu, or rip through it in a breeze?)
* Spindle type and power (dremel -> 43mm router -> handheld router -> VFD spindle)))

Cut alu at a resonable feed rate, spindle down to end user but designed for VFD

Probably loads i've missed, so copy paste and add/change bits...)))

How about bed construction?

On my wishlist would be the ability to add a 4th axis (parallel with x) at some future time, without hacking the machine to bits. Designed in expansion capability if you will......)))

This is important to me