Our Pick: CNC 6090 Router

It wins 6 out of 10 comparison categories across specs and benchmark scores.

CNC 6090
Spec
Sienci Labs
$1500
Price
$1400
600 × 900 mm
Work area
1219 × 762 mm
100 mm
Z travel
114 mm
1500 W
Spindle power
710 W
85 kg
Weight
32 kg
Varies by manufacturer; the cited ChinaCNCzone version uses an aluminum frame, round guides and ball screws
Frame
Steel and aluminum with anti-backlash lead screws
Seller-dependent Mach3 parallel-port or USB motion controller; confirm the supplied board and license
Controller
LongBoard (GRBL-based, custom)
Mach3 where supplied with a compatible controller, CAD/CAM with a post processor for the exact controller
Software
gSender, UGS, CNCjs, Easel
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 CNC 6090 Router

Sienci Labs LongMill MK2 48x30 wins 3 of 5 spec categories. Both are similarly priced. Sienci Labs LongMill MK2 48x30 leads by 6 points overall — here’s where those points come from:

Benchmark Scores

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

68
CNC 6090

Overall

74
Sienci Labs
88 Value 75
70 Rigidity 50
62 Precision 58
30 Ease of use 82
72 Capability 62

CNC 6090 Router

Pros

  • Water-cooled spindle options are available; check the exact package and electrical supply
  • Some named 6090 variants specify ball screws on all axes
  • Large 600x900mm work area suits many commercial projects

Cons

  • Specifications and supplied equipment vary between 6090 listings
  • Confirm net machine weight and delivery arrangements with the exact seller
  • Water cooling system requires setup and ongoing maintenance
  • Confirm the controller, wiring documentation and required mains supply before ordering
  • Warranty and support depend on the actual manufacturer and seller

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

Verdict

CNC 6090 Router wins this comparison with 6 categories to 4.

It wins 6 out of 10 comparison categories across specs and benchmark scores.

Where to Buy

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Frequently Asked Questions

What is the difference between CNC 6090 Router and Sienci Labs LongMill MK2 48x30?

The CNC 6090 Router ($1,500) features a 1500W spindle with a 600×900mm work area and a Varies by manufacturer; the cited ChinaCNCzone version uses an aluminum frame, round guides and ball screws frame. 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. Overall, the CNC 6090 Router wins more comparison categories.

Which is better value for money — CNC 6090 Router or Sienci Labs LongMill MK2 48x30?

The Sienci Labs LongMill MK2 48x30 is $100 cheaper at $1,400 vs $1,500. Our value scores rate the CNC 6090 Router higher at 88/100.

Which router is easier to set up and use?

Based on our ease-of-use benchmarks, the Sienci Labs LongMill MK2 48x30 scores higher (82/100 vs 30/100). Both support Mach3, LinuxCNC, UGS among other software options.

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