Laser cutting vs CNC routing — which suits your job

Edge finish — what each leaves behind

Laser cutting on acrylic finishes the edge as it cuts — the focused beam melts and re-solidifies the polymer, leaving a smooth flame-polished edge that needs no further work. CNC routing leaves a machined edge — clean and finishable, but with tool marks visible under close inspection. For signage where the edge is on display, that difference is often the deciding factor.

Material compatibility

Material chemistry sets hard limits on which process is safe and which produces a clean cut.

• →Laser only / never router: nothing — the router cuts everything the laser can
• →Router only / never laser: ACM (reflective skin, toxic-core fume), foam-PVC (chlorine release)
• →Both work: acrylic — split by thickness and edge requirement
• →Both with review: MDF, plywood, timber — finish and grade dictate process
• →Neither: solid metal plate, mystery plastics, painted unknowns

Thickness and bed size

Each machine in the workshop has a published depth and bed-size envelope. The Thunder Nova 51 laser cuts up to 8 mm; the production laser handles up to 12 mm. The Avid CNC router beds are 2440 × 1220 mm with 50 mm cut depth; the Multicam SR3012V extends to 3000 × 1220 mm. Past the laser's depth limit, the router is the only path. Past the standard 2.4 m sheet length, the Multicam is the only path.

Detail, complexity and feature size

The laser holds finer detail than the router because the kerf (cut width) is narrower and the heat-affected zone is smaller. For letter sets with tight inside corners, fine decorative patterns or small repeating features, laser is usually the call. For complex profiles with internal pockets, slot-fits or thicker stock, the router earns its place.

Cost positioning

Per-job cost depends on machine time, material yield and setup — not a flat rate per process. Laser jobs on thin acrylic often finish faster than router jobs on the same material; router jobs on thick stock are typically the only option and the cost reflects that. We quote per job with the process matched to the work, not the other way around.

When we use both on one job

It's not unusual to laser one part of a job and route another. A push-through signage build is a good example — the acrylic faces are laser cut for the flame-polished edge, the backer panel is router cut from foam-PVC or MDF, the kit ships together. Send the file with material call-outs per part and we'll handle the split.

How to choose

Most of the time the choice is automatic — material chemistry or thickness rules out one process. When both genuinely work, the deciding question is: does the customer see the edge? If yes, laser finishes itself; if no (or if it gets painted, vinyled, or mounted into a hidden join), router is faster and often cheaper. If you're not sure, send the file with notes — we'll pick the process and tell you why.