Head-to-head

Acmer P2 33W vs Sculpfun SF-A9 40W: best open-frame cutter

Two strong open-frame diode lasers with air assist, $210 apart.

Updated October 31, 2026

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Which should you buy?

Pick the Acmer P2 ($589) for value, pre-assembly and linear rails. Pick the Sculpfun SF-A9 ($799.99) if you cut thick wood often: it measured 41W and cut 10 mm plywood in one pass.

Full comparison

Comparison of Acmer P2 33W, Sculpfun SF-A9 40W
Feature
Acmer P2 33W
Acmer Acmer P2 33W Top score
Sculpfun SF-A9 40W
Sculpfun Sculpfun SF-A9 40W
Overall score 8.38.2
Power and speed
8.5
8.9
Results and build
8.0
8.0
Software and safety
7.6
6.8
Value
9.0
8.7
Price (USD) $589$799.99
Best for Makers with a ventilated workshop who want fast cutting for little moneyMakers who mostly cut wood and acrylic and want the most power per dollar
Pros
  • 33W diode cut 7 mm plywood and 3 mm black acrylic in one pass (3DWithUs)
  • Arrives pre-assembled; running in minutes
  • Linear rails and built-in 30 L/min air assist
  • Measured 41W optical output; 20W mode for finer work
  • 10 mm plywood in one pass at 300 mm/min
  • Beat the xTool S1 and D1 Pro 40W on 6 mm plywood
Cons
  • Open frame: no enclosure or fume extraction included
  • No honeycomb bed in the base pack
  • Docs mix mm/s and mm/min, which confused The Gadgeteer
  • Larger spot: weaker on sub-millimetre detail and photos
  • Air pump hums constantly while the laser is on
  • Front frame hides the nozzle, making placement hard
Specifications
Laser 33W blue diode (also 10W and 20W versions)40W blue diode (8 diodes), switchable to 20W
Work area 420 × 400 mm, expandable400 × 400 mm
Max speed 30,000 mm/min36,000 mm/min
Air assist Automatic, 30 L/min—
Motion Linear rails—
Software LightBurn, LaserGRBL, Acmer appLightBurn, LaserGRBL
Price 33W $589 · 20W $539 · 10W $379 · enclosure pack $737$799.99 · with honeycomb and rotary $1,079.99
Measured power —41W (Hobby Laser Cutters)
Spot —0.15 × 0.1 mm (claimed)
Safety —Flame and temperature sensor, 15° tilt sensor, emergency stop, child lock
Links Read review Check price at Acmer Read review Check price at Sculpfun