Inventables
Inventables X-Carve Pro (4x4)
$11995
Released 2021-01-01
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Inventables X-Carve Pro (4x4) vs Sienci LongMill MK2 (48x30)
A sourced, side-by-side comparison. Sienci LongMill MK2 (48x30) is cheaper at $1799. Every spec and price links to its source.
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Sienci Labs
Sienci LongMill MK2 (48x30)
$1799Cheaper
Released 2022-02-01
Which is better: the Inventables X-Carve Pro (4x4) or Sienci LongMill MK2 (48x30)?
On the specs we track, they're closely matched. The Sienci LongMill MK2 (48x30) is the cheaper at $1799.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Inventables X-Carve Pro (4x4) | Sienci LongMill MK2 (48x30) |
|---|---|---|
| US price | $11995 | $1799 |
| Brand | Inventables | Sienci Labs |
| Released | 2021-01-01 | 2022-02-01 |
| Work area x (mm) | 1219 | 1219 |
| Work area y (mm) | 1219 | 762 |
| Work area z (mm) | 102 | — |
| Spindle power (W) | 1500 | 710 |
| Spindle speed (rpm) | 8,000-24,000 | 10,000-30,000 |
| Frame material | Powder-coated aluminum gantry with 25mm ball screws and linear guides | Extruded aluminum rails with UHMW/HDPE wheels, lead screw drive on all axes |
| Controller firmware | X-Controller Pro (Inventables proprietary controller enclosure), Easel Pro software | Sienci controller box (GRBL-based), gSender sender software |
| Max feed rate mm min | — | — |
| Repeatability (mm) | 0.025 | — |
Sources — Inventables X-Carve Pro (4x4): inventables.com (verified 2026-08-09). Sienci LongMill MK2 (48x30): sienci.com (verified 2026-08-09).
What's the difference between the Inventables X-Carve Pro (4x4) and Sienci LongMill MK2 (48x30)?
Where the two actually differ on the specs we track (5 of 9). Matching specs are omitted.
- Work area y (mm): Inventables X-Carve Pro (4x4) 1219 vs Sienci LongMill MK2 (48x30) 762
- Spindle power (W): Inventables X-Carve Pro (4x4) 1500 vs Sienci LongMill MK2 (48x30) 710
- Spindle speed (rpm): Inventables X-Carve Pro (4x4) 8,000-24,000 vs Sienci LongMill MK2 (48x30) 10,000-30,000
- Frame material: Inventables X-Carve Pro (4x4) Powder-coated aluminum gantry with 25mm ball screws and linear guides vs Sienci LongMill MK2 (48x30) Extruded aluminum rails with UHMW/HDPE wheels, lead screw drive on all axes
- Controller firmware: Inventables X-Carve Pro (4x4) X-Controller Pro (Inventables proprietary controller enclosure), Easel Pro software vs Sienci LongMill MK2 (48x30) Sienci controller box (GRBL-based), gSender sender software