Sienci LongMill MK3 30x30
#5 in LargeFull review
For a hobbyist who wants a rigid rail machine with a 32 by 32 inch bed for well under $2,000, and already has or will buy a trim router.
Sienci Labs $1,400$1,400
The Sienci LongMill MK3 30x30 is the better CNC router overall, rated 3.4 to 2.9. The Sienci LongMill MK3 30x30 leads on motion. The LUNYEE 8080 Pro Max costs $501 less ($899 vs $1,400).
LUNYEE 8080 Pro Max
#9 in LargeFull review
A low price way into a 31.5 in square bed for sign makers working mostly in wood, MDF and acrylic. Buyers who need proven rigidity for aluminum should pick a machine with published rails and screws.
Amazon $899$899
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Sienci LongMill MK3 30x30 for motion (linear rails, screw or rack drive, limit switches, closed-loop steppers vs limit switches).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every large CNC router; a clear win is highlighted. How we rank explains each one.
| Factor weight | Sienci LongMill MK3 30x30 | LUNYEE 8080 Pro Max |
|---|---|---|
| Overall rating | 3.4/5 | 2.9/5 |
| Price 25% | 100 $1,400 | 100 $899 |
| Work area 15% | 9 1,024 sq in (32 x 32 in) | 7 992 sq in (31.5 x 31.5 in) |
| Spindle 15% | 50 spindle power not published (neutral score used) | 80 800 W spindle |
| Motion 20% | 100 linear rails, screw or rack drive, limit switches, closed-loop steppers | 15 limit switches |
| Warranty 25% | 0 1-year warranty | 0 1-year warranty |
Specifications
| Sienci LongMill MK3 30x30 | LUNYEE 8080 Pro Max | |
|---|---|---|
| Work area | ||
| Travel (X x Y x Z) | 32 x 32 x 5.1 in | 31.5 x 31.5 x 3.9 in |
| Area | 1,024 sq in | 992 sq in |
| Spindle | ||
| Spindle | 65 mm router or 80 mm spindle mount (router not included) | 800W 6 speed trim router, ER11 collets |
| Power | - | 800 W |
| Top speed | - | 30,000 rpm |
| Motion and control | ||
| Frame | - | aluminum and steel |
| Linear rails | Yes | - |
| Drive | Lead screw | - |
| Closed-loop steppers | Yes | No |
| Limit switches | Yes | Yes |
| Controller | SLB-LITE with grblHAL | GRBL 1.1f (32-bit board) |
| Offline controller | - | No |
| Build | ||
| Weight | 72 lb | 62 lb |
| Warranty | 1 year | 1 year |
| Released | 2026-09 | - |