How Infurnia's .nc G-code is limited: R-arcs, no cutter comp, mm absolute

Learn the fixed rules of Infurnia's small G-code dialect so you know what its .nc output can and cannot express on your controller.

1. Infurnia's .nc output is deliberately a small G-code dialect, and several controller-compatibility questions come down to its fixed rules.

2. Arcs are always emitted as G2/G3 with an R radius value - never I/J/K center form.

   ✓ Checked in the product on 18 October 2026

3. The R is signed: positive for the short (acute) arc, negative for the long (obtuse) arc, per ISO convention.

4. Cutter radius compensation (G41/G42) is never emitted: contours are already offset geometrically for the tool diameter, so the machine must run with compensation off.

   ✓ Checked in the product on 18 October 2026

5. Coordinates are always absolute (G90) and millimetres - there is no inch mode; putting G20 in a start code will not convert the numbers.

   ✓ Checked in the product on 18 October 2026