ruk·si
/notes

🔪 Cutting

Updated at 2024-07-15 00:20

Get a snap-off utility knife. A good general workhorse and the longer blade option definitely has its uses.

Optionally get a scalpel handle and blades for it. Hobby knives are inferior for most uses except removing mold lines. Get a good brand handle and blades from the same brand. Swann Morton is a good brand, 10A is a good blade size.

Medical grade scalpels are also infinitely more dangerous than other knives. Avoid scalpels with round handles as they might roll off the table and hit you.

Get a metallic safety ruler. It has a groove in the middle to guide the blade and/or a raised guard to prevent cutting your fingers. 15–30 cm is optimal; better if it has both metric and inch measurements.

A compass saw can come in handy when working with high density foam and other terrain stuff, but hot wire cutters are better. Saw stuff outside and wear a mask, the dust is messy and toxic.

Hot wire pencils can be useful for sculpting high density foam e.g. Peter Child Artist's Pyrography machine. Soldering iron for electronics can work as a replacement.

Hot Wire

Hot wire tables (e.g., Proxxon THERMOCUT 115/E) are awesome. A snap-off utility knife will help you to get started, but the hot wire table is worth it if you work a lot with XPS and the like. Makes precise cuts and is a pleasure to work with. Costs like $100 and takes quite a bit of space though.

Ventilation is always to be assumed when cutting with a hot wire. Most of the materials cut with a hot wire can release toxic fumes, don't inhale that stuff.

EPS and XPS foam cutting produces mostly just hydrocarbons and water vapor, so it is known to be relatively safe if you don't burn the material.

What you can cut with a hot wire cutter:

  • EPS (Expanded Polystyrene) foam; the airy white foam used for packaging
  • XPS (Extruded Polystyrene) foam; the dense smooth foam used for insulation
  • PE (Polyethylene) foam; the rough foam used for pool noodles
  • EVA (Ethylene-Vinyl Acetate) foam; the flexible material used in toddler mats. Cutting EVA might require high temperature depending on the type of EVA
  • EPP (Expanded Polypropylene); a foam used to package sensitive instruments

You shouldn't cut PU (Polyurethane) foam with a hot wire, the material used in sofa/bed stuffings. It releases toxic fumes and leaves a mess on the wire.

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