cnc hotwire foam cutting tips

In order to get the most out of your foam cutting projects we have collected some tips and experiences straight out of the lab :

  • hotwire thickness : thicker wires can carry more current and can get hotter thus travel faster , but with more heat and speed comes more inaccuracy. Keep your wires thin and speeds low for more accurate models.
  • speeds : Denser foams need more heat or lower speeds. Thicker blocks also need a speed adjustment.
  • complex models : To create complex shapes it may be neccesary to rotate your foam blocks in incremental degrees (usually 45 or 90 degrees). Keep your blocks aligned securely and perpendicular to the hotwire for best results.
  • dirt : To cut costs many people use old insulation blocks. No problem, just be careful with any dirt on the blocks that may accumulate on your hotwire. Dirt will instantly bake on and ruin a perfect cut.
  • When you have a choice, always start cutting at the top and work your way down to the bottom of the piece.