Image: Sienci Labs
Sienci Labs LongMill MK3 30x30
Sienci Labs
Best for: Hobbyists and small shops who want a well-supported 30x30 inch machine for wood and plastics with occasional aluminium
Typical starting price
$1,400Editorial baseline for this machine
Overall score
Best current buying path
Where to buy
Prices change often: compare the stores below
- Shipping varies by retailer
- Check manufacturer site for availability
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Quick verdict
The LongMill MK3 replaces the earlier roller-guided design with 15 mm profile rails and closed-loop NEMA 23 motors. The 30x30 model has a stated 32 x 32 inch cutting area. It retains lead screws and uses SLB-LITE control with grblHAL and gSender. Supply a router, table and wasteboard, then allow for setup and calibration. Larger spindle and dust-shoe combinations can reduce usable area, so check the mounting arrangement before choosing those accessories.
Who this fits best
Hobbyists and small shops who want a well-supported 30x30 inch machine for wood and plastics with occasional aluminium
Buy this if
Hobbyists and small shops who want a well-supported 30x30 inch machine for wood and plastics with occasional aluminium. Profiled 15mm linear rails on every axis, a big step up from the MK2 roller design.
Skip this if
Router is not included, budget for a trim router or the AutoSpin T1, and lead screws, not ball screws, so long-term wear and speed are below an AltMill.
What else you still need
A 65mm trim router or Sienci's AutoSpin T1, a flat table or bench, an MDF wasteboard, bits and clamps. A dust shoe and shop vacuum are close to essential indoors.
Material reality check
Hardwoods, softwoods, plywood, MDF, plastics and foam are its home ground. Aluminium works with small cutters and light passes; it is not built for regular metal production.
Better alternative if...
you plan to cut aluminium regularly or want ball screws. See Sienci Labs AltMill MK2 2x4
Where it wins
- Profiled 15mm linear rails on every axis, a big step up from the MK2 roller design
- Closed-loop NEMA 23 drives monitor motor position errors
- Ships largely pre-assembled, Sienci quotes about two hours to first cut
- Y-axis auto-squaring and limit switches come standard
- Free gSender control software and manufacturer setup documentation
Where it falls short
- Router is not included, budget for a trim router or the AutoSpin T1
- T12 lead screws on all axes rather than ball screws
- No table or wasteboard in the box
- Lead time was about six weeks at launch
- Prices are set in Canadian dollars, so the USD price moves with the exchange rate
Specifications
813 × 813 mm
6610 cm²
710W
Router sold separately; 65 mm and 80 mm mounting options, with possible work-area reduction for larger spindle/dust-shoe combinations
SLB-LITE running grblHAL, NEMA 23 closed-loop steppers (1.2 Nm)
33 kg
$1,400
mid range
Full specification table
Relative to database
Benchmark Scores
Overall Score
Composite across 5 dimensions
Community Sentiment
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