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  3. S1 3.5W vs S2 4W

Acmer S1 3.5W vs Acmer S2 4W

What S1 3.5W does better (1) and where S2 4W wins (5) — every spec side by side.

Acmer S1 3.5W
Acmer · 2023S1 3.5W
4.3Score
1 advantage≈ US$130
vs
Acmer S2 4W
Acmer · 2025S2 4W
4.9Score
5 advantages≈ US$140
Higher score
2.7Power & cutting2.9
3.5Speed3.5
9.4Precision8.7
2.9Work area4.8
3.2Safety3.2
2.4Features & ease of use5.7
Dimensions

Size comparison

S1 3.5WS2 4W
250 × 162250490 × 195500
S1 3.5WS2 4WDifference
Height162 mm195 mm−33 mm
Width250 mm490 mm−240 mm
Depth250 mm500 mm−250 mm

Drawn to the same scale from the official dimensions (front and side).

Why is S1 3.5W better than S2 4W?

  1. Laser spot size0.04 mm vs 0.06 mm+50%

Why is S2 4W better than S1 3.5W?

  1. Work area (surface)169 cm² vs 900 cm²5.3×
  2. Air assistNo · S1 3.5W: Yes
  3. Laser output power3.5 W vs 4 W+14%
  4. Work area width (X)130 mm vs 300 mm2.3×
  5. Work area depth (Y)130 mm vs 300 mm2.3×
Specifications

Side by side

Acmer S1 3.5WAcmer S1 3.5W≈ US$1304.3
Acmer S2 4WAcmer S2 4W≈ US$1404.9
General
Laser sourcesBlue diode (≈455 nm)Blue diode (≈455 nm)
Motion systemGantry (XY rails)Gantry (XY rails)
Two laser sourcesNoNo
Laser power
Laser output power3.5 W4 W
Work area
Work area130 × 130 mm300 × 300 mm
Work area width (X)130 mm300 mm
Work area depth (Y)130 mm300 mm
Work area (surface)169 cm²900 cm²
Speed & cutting
Max engraving / travel speed167 mm/s167 mm/s
Precision
Laser spot size0.04 mm0.06 mm
Safety
Enclosed (fully covered)NoNo
Flame / fire detectionNoNo
Features
Air assistNoYes
Built-in cameraNoNo
Autofocus / auto heightNoNo
Rotary attachment support—Yes
Connectivity & software
Compatible software—LightBurn
LightBurn compatible—Yes
Size & power
Width250 mm490 mm
Depth250 mm500 mm
Height162 mm195 mm
Weight1.5 kg—
To compare: 0up to 4 models
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