cheapest sheet materials for 3d milling

[mark84]

Machine wax, here's one supplier, there are others, http://trycut.co.uk/
It's quite expensive but there's no waste as it just remelts back to a block.
So after the initial cost each part made is essentially free

That's very interesting, any thoughts on the spindle speed and feed, I have visions of melted wax everywhere!

[Chaz]

That's very interesting, any thoughts on the spindle speed and feed, I have visions of melted wax everywhere!

Id guess its similar to alu but its only a guess. Perhaps ask the vendor and let us know your finding please. Also interested in this.

[EddyCurrent]

Whatever it takes to keep friction down and without deformation of the wax, a relatively slow spindle speed but a relatively high feed rate. ("relatively" meaning, I don't know an exact number for certain )

[Chaz]

Whatever it takes to keep friction down, a relatively slow spindle speed but a relatively high feed rate. ("relatively" meaning, I don't know an exact number for certain )

Thing is, the wax talks about being self lubricating. Probably the paraffin component of it. In which case it probably allows to cut at high rpm and fairly high feed rates. I looked at some vids last night, 'feels like' what Id do for Alu, easily.