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  3. S2 20W vs Ray7 15W

Acmer S2 20W vs Longer Ray7 15W

What S2 20W does better (1) and where Ray7 15W wins (4) — every spec side by side.

Acmer S2 20W
Acmer · 2025S2 20W
6.4Score
1 advantage≈ US$320
vs
Longer Ray7 15W
Longer · 2026Ray7 15W
7.8Score
4 advantages≈ US$300
Higher score
7.7Power & cutting7.0
3.5Speed8.0
8.7Precision5.7
4.8Work area5.3
3.2Safety6.9
5.7Features & ease of use6.9

Why is S2 20W better than Ray7 15W?

  1. Laser output power20 W vs 15 W+33%

Why is Ray7 15W better than S2 20W?

  1. Max engraving / travel speed167 mm/s vs 600 mm/s3.6×
  2. Work area (surface)900 cm² vs 946 cm²+5%
  3. Flame / fire detectionNo · S2 20W: Yes
  4. Work area depth (Y)300 mm vs 310 mm+3%
Specifications

Side by side

Acmer S2 20WAcmer S2 20W≈ US$3206.4
Longer Ray7 15WLonger Ray7 15W≈ US$3007.8
General
Laser sourcesBlue diode (≈455 nm)Blue diode (≈455 nm)
Motion systemGantry (XY rails)Gantry (XY rails)
Two laser sourcesNoNo
Laser power
Laser output power20 W15 W
Work area
Work area300 × 300 mm305 × 310 mm
Work area width (X)300 mm305 mm
Work area depth (Y)300 mm310 mm
Work area (surface)900 cm²946 cm²
Speed & cutting
Max engraving / travel speed167 mm/s600 mm/s
Precision
Laser spot size0.06 mm0.06 mm
Positioning accuracy—0.06 mm
Safety
Enclosed (fully covered)NoNo
Flame / fire detectionNoYes
Emergency stop button—Yes
Features
Air assistYesYes
Built-in cameraNoNo
Autofocus / auto heightNoNo
Rotary attachment supportYes—
Offline engraving (no computer)—Yes
Connectivity & software
Connections—Wi-Fi
Wi-Fi—Yes
Compatible softwareLightBurn—
LightBurn compatibleYes—
Size & power
Width490 mm—
Depth500 mm—
Height195 mm—
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