Testing my new CNC mill. In preparation for casting letterpress type. Based on Proxxon MF70, running GRBL on Arduino board. 3-Axis NEMA 23 Stepper motors.


Custom wooden mold for casting a type metal* toy soldier in a portable foundry.


*Alloy of lead, tin and antimony



This was just a machine test, on reflection, wood isn't an ideal medium for something like this. Aluminum would work much better.


Roughing cut and drilling was done with a 1/8 flat end mill.
Finishing was done with a 1mm ball-note end mill.
Feed rate: 320 mm/min. Plunge rate 100mm/min.


Total machining time for 2 roughing cuts, 2 finishing cuts and 2 drilling passes = 1.5 hours.


Software used: 3D Studio Max (for the modeling), Vectric Aspire (for calculating toolpaths), Universal G-code Sender (for controlling the machine, and supplying the code).


Casting information: Lee Precision melting pot. Type metal (75% Lead, 20% Tin, 5%Antimony). Thermal setting 7 (760 F).
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Gulkoff &Co Portable Foundry is part of the Traveling Dime Museum and Medicine Show, a wayward arm of the Tramping Pillowface Press shop upheld (just barely) by Ivan Gulkov -- designer, printer of ponderous paraphernalia.

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