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 3.3. The Sienci LongMill MK3 30x30 leads on price. The Sienci LongMill MK3 30x30 costs $399 less ($1,400 vs $1,799).
FoxAlien XE-Ultra 8080
#7 in LargeFull review
A large, rigid benchtop router for woodworkers who want a near 3 by 3 ft bed with ball screws. Add a router or spindle and a spoilboard to the price.
Amazon $1,799$1,799
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 price ($1,400 vs $1,799).
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 | FoxAlien XE-Ultra 8080 |
|---|---|---|
| Overall rating | 3.4/5 | 3.3/5 |
| Price 25% | 100 $1,400 | 85 $1,799 |
| Work area 15% | 9 1,024 sq in (32 x 32 in) | 14 1,096 sq in (33.1 x 33.1 in) |
| Spindle 15% | 50 spindle power not published (neutral score used) | 50 spindle power not published (neutral score used) |
| Motion 20% | 100 linear rails, screw or rack drive, limit switches, closed-loop steppers | 100 linear rails, screw or rack drive, limit switches, closed-loop steppers |
| Warranty 25% | 0 1-year warranty | 0 1-year warranty |
Specifications
| Sienci LongMill MK3 30x30 | FoxAlien XE-Ultra 8080 | |
|---|---|---|
| Work area | ||
| Travel (X x Y x Z) | 32 x 32 x 5.1 in | 33.1 x 33.1 x 4.7 in |
| Area | 1,024 sq in | 1,096 sq in |
| Spindle | ||
| Spindle | 65 mm router or 80 mm spindle mount (router not included) | 65 mm router mount (spindle not included) |
| Motion and control | ||
| Frame | - | aluminum extrusion (46 x 80 mm) |
| Linear rails | Yes | Yes |
| Drive | Lead screw | Ball screw |
| Closed-loop steppers | Yes | Yes |
| Limit switches | Yes | Yes |
| Controller | SLB-LITE with grblHAL | FoxAlien 32-bit control box |
| Offline controller | - | No |
| Build | ||
| Weight | 72 lb | - |
| Warranty | 1 year | 1 year |
| Released | 2026-09 | 2025-07 |