CNC nesting, with every nest checked before hand-off. A CNC nesting engine with an independent check on every nest.

How a job flows

Six steps, in order.

Import Reads your DXF. States the units it found, or asks when it cannot tell.
Repair Closes small gaps and fixes shapes, only with your consent.
Nest Rotates parts within the limits you set, keeps the kerf spacing and aims for the fewest sheets.
Check A separate, independent verifier re-checks every nest.
Explain Gives a plain reason for every refusal.
Output A nest report with the sheets (the exporter is still being finished). G-code: in the near future.

By the numbers

Figure	What it is	Note
0 crashes	across 1,518 real-world drawings in a full sweep
4,488 parts	placed across 4 benchmark instances, and the independent verifier Passed on all 20 runs
Never worse	than our previous engine on any of 20 benchmark pairs: fewer sheets on 6, equal on 14	Four public benchmark instances, five seeds each, one machine.
1,994 tests	passed, 0 failed, in one full workspace run	14 more are marked ignored.
884 drawings	from a public corpus nested end to end, every nest verified	Out of 1,518 open-source drawings, not customer work. The rest stopped without a crash.
568,158 per second	candidate placements evaluated	One 120 x 60 sheet with 60 items placed, on one Mac.
8 of 8	router test programs accepted by the emulators in our test setup	Emulator results only. No physical machine has run any output.
9 crates	in the engine workspace, with the verifier as its own crate

9 crates in the engine workspace, with the verifier as its own crate.
Import: Reads your DXF. States the units it found, or asks when it cannot tell.
Check: A separate, independent verifier re-checks every nest.
8 of 8 router test programs accepted by the emulators in our test setup. Emulator results only. No physical machine has run any output.

PolyTernal places parts onto sheets.

A separate, independent check re-checks each nest before it is handed back.

Every nest is checked independently before hand-off. Overlaps are caught.

In the near future: from nest to machine.

Output: A nest report with the sheets (the exporter is still being finished). G-code: in the near future.

PolyTernal nests parts onto sheets.

An independent check verifies every nest before hand-off.

These third-party models appear only in the 3D demo scene. They are not part of the PolyTernal engine.

HS-CNC Router 48 X 24 by Muhammad Hanif (CC BY 4.0)
Open epilog laser cutter by dagen.valentine (CC BY 4.0)
speed plasma 3015 by Elmendalerenda (CC BY 4.0)
Workbench by JJ Chalupnik (CC BY 4.0)
Tool Cabinet by Insane Ninja (guru2fifa) (CC BY 4.0)
Low Poly Pallet Jack by Monke (cosmiccobra) (CC BY 4.0)
Ceiling Fluorescent Light by Jimmy Johansson (CC BY 4.0)
Wooden Pallet Low-poly by MaX3Dd (CC BY 4.0)