Cut3D would be better for that as it supports four side machining. It can be done in Aspire but it's not something I do.
It's best to work through the tutorials on the main site - http://www.vectric.com
- as it's not the sort of program you can really learn by having a go. There are important concepts that, if not understood, will lead to lots of frustration and an incorrect view of what the software is capable of.
Not sure what 3D package you're using but it created a lot of redundant geometery on the STL file you posted.
I used a conversion program to create the STL file from a DAE (ex Sketchup.)
I have pretty much moved over to Autocad Inventor now - that learning curve was steep, but no more having to convert, so swings and roundabouts.
I am never happy with conversions - I prefer the data path to be as short as possible between design and implementation, but in that case it was a purchased plan that was in Sketchup SKP format (bleah!).
So, it looks like another weekend of tutorials
Oh well, plenty of rugby and motogp in the background - not too much of a chore.
Thanks very much for your advice Adrian - much appreciated. It is a new venture for me having come from a computing / electronics background into 'manual' woodworking, and now to CNC. But I love learning and trying new technologies. I have a lot of experience of computer-controlled things like printers (large - 6-colour offset, dye-sub, etc.), scanning, laser cutters, engravers, so the concepts aren't entirely new, but learning how to translate what's in my head, to a 2D design and actually cutting that out, finishing and selling the products is a whole new ball-game.
I have already upgraded my CNC from 4x4 to 8x4 and could probably justify 6x10 if I sat down and did the figures.
The reason Aspire attracted me was the ability to add further strings to my bow in the nature of wood engraving, lithophanes, etc. and potentially to branch out into supplying the sign industry. What started out as routing picture frames and making bookcases for friends has completely changed, now I have 'found' CNC
I live in a small SE Asian nation, there isn't another CNC machine in the country and I am just beginning to scratch the surface of the potential markets. What started out as a hobby to keep me out of trouble has ended up more than paying or itself. I haven't even though about metal cutting, it is an area so far outside my expertise, but there is a booming construction and boat-building industry that is ripe for the plucking
I am lucky in that I don't need to make money to live - I have a hard-working wife, free housing, power and a very low cost of living, so I have the time and breathing space to develop this business without having to worry about feeding hungry mouths
Onwards and upwards!