Our Pick: Sienci Labs LongMill MK2 48x30

It scores 74/100 overall versus 64/100, winning 7 out of 9 comparison categories.

Sienci Labs
Spec
Inventables X-Carve (legacy 1000mm)
$1400
Price
$1400
1219 × 762 mm
Work area
750 × 750 mm
114 mm
Z travel
65 mm
710 W
Spindle power
900 W
32 kg
Weight
28 kg
Steel and aluminum with anti-backlash lead screws
Frame
Aluminum extrusion and steel plates, V-wheel guides, belt-driven X/Y and ACME lead-screw Z
LongBoard (GRBL-based, custom)
Controller
X-Controller (GRBL-based)
gSender, UGS, CNCjs, Easel
Software
Easel, UGS, CNCjs, Fusion 360
Sienci Labs LongMill MK2 48x30 is no longer sold new. Sienci Labs replaced the LongMill MK2 with the MK3, which adds linear rails and closed-loop motors. Closest current alternative: Sienci Labs LongMill MK3 48x30 (from $1,800) · Sienci Labs LongMill MK3 48x30 vs Inventables X-Carve (legacy 1000mm)

Sienci Labs LongMill MK2 48x30 wins 3 of 4 spec categories. Both are similarly priced. Sienci Labs LongMill MK2 48x30 leads by 10 points overall — here’s where those points come from:

Benchmark Scores

Side-by-side score comparison across all five benchmark dimensions.

74
Sienci Labs

Overall

64
Inventables X-Carve (legacy 1000mm)
75 Value 50
50 Rigidity 42
58 Precision 48
82 Ease of use 92
62 Capability 52

Sienci Labs LongMill MK2 48x30

Pros

  • Large 48x30 inch work area handles full-width projects
  • Same excellent documentation as the 30x30 model
  • Anti-backlash lead screws on all axes
  • gSender software is beginner-friendly and well-maintained
  • Responsive Canadian customer support

Cons

  • Router not included adds to total cost
  • Larger span reduces rigidity compared to 30x30
  • Requires significant workspace footprint
  • Heavier and more complex assembly
  • Lead screw speed limits rapids on longer axis

Inventables X-Carve (legacy 1000mm)

Pros

  • Easel combines design, toolpath generation and machine control
  • Compatible with common trim routers when the correct mount is fitted
  • Large 750x750mm work area
  • Massive community with years of projects and tutorials
  • Legacy documentation and community projects remain available

Cons

  • V-wheel motion system is outdated compared to linear rail competitors
  • Discontinued, with original replacement assemblies subject to remaining stock
  • X/Y belts and V-wheels require tension and adjustment checks
  • Easel Pro requires a subscription for advanced features

Verdict

Sienci Labs LongMill MK2 48x30 wins this comparison with 7 categories to 2.

It scores 74/100 overall versus 64/100, winning 7 out of 9 comparison categories.

Where to Buy

Price-first merchant links with the clearest reason to click first.

Sienci Labs LongMill MK2 48x30

$1400

Inventables X-Carve (legacy 1000mm)

$1400

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Frequently Asked Questions

What is the difference between Sienci Labs LongMill MK2 48x30 and Inventables X-Carve (legacy 1000mm)?

The Sienci Labs LongMill MK2 48x30 ($1,400) features a 710W spindle with a 1219×762mm work area and a Steel and aluminum with anti-backlash lead screws frame. The Inventables X-Carve (legacy 1000mm) ($1,400) features a 900W spindle with a 750×750mm work area and a Aluminum extrusion and steel plates, V-wheel guides, belt-driven X/Y and ACME lead-screw Z frame. Overall, the Sienci Labs LongMill MK2 48x30 wins more comparison categories.

Which is better value for money — Sienci Labs LongMill MK2 48x30 or Inventables X-Carve (legacy 1000mm)?

Both machines are identically priced at $1400. Our value scores rate the Sienci Labs LongMill MK2 48x30 higher at 75/100.

Which router is easier to set up and use?

Based on our ease-of-use benchmarks, the Inventables X-Carve (legacy 1000mm) scores higher (92/100 vs 82/100). Both support gSender, UGS, CNCjs among other software options.

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