STV CNC SparX PRO 12
Image: stvcnc.com, STV CNC
Key Specifications
cutting area
max plate thickness
machine weight
water pan capacity
water pan depth
gantry clearance
How much does the STV CNC SparX PRO 12 cost?
Price estimate
We do not have a price for the STV CNC SparX PRO 12 that we can stand behind, so we show no number. Configuration, options and installation move the final price a long way: a quote is the reliable figure.
Overview
At 12 ft x 6 ft, the STV CNC SparX PRO 12 has the largest standard cutting envelope in its series. It is the welded-frame version of the SparX, delivered built and ready to level. A table this long is chosen for the part, not the sheet count: 12 ft covers long plates and frame members in one program with no re-indexing.
Nothing is bolted together by the owner. The open tubular frame, its leg supports and the pan support beams are welded, and the water table is one welded pan 3 in deep, so there are no silicone joints to leak. STV CNC rates it for 2 in steel plate. The extruded aluminum gantry clears 5.75 in and carries 5.5 in of Z travel on a ball lead screw. Three stepper motors work through a belt-driven 3:1 gear reduction, which STV CNC credits with smoother arcs and circles, and the stated motion accuracy is about 0.002 in per 12 in with a step resolution of plus or minus 0.0005 in. Rack and pinion with linear guides moves both gantry and table, and carriage shields keep splash off the bearings.
Everything scales with it. The water pan holds about 167 gallons. Confirm the outside dimensions with the order before laying out the bay. The table weighs 2,100 lb, which sets what the truck and the forklift have to be. Material at this size arrives by crane or forklift, and the shop needs a clear run to the table as long as the sheet itself.
Out of the box the table runs MyPlasmCNC from a Windows PC the buyer supplies, over USB. That is the same entry-level control as the modular SparX tables. STV CNC sells an upgrade to its Optimum CNC control, which adds a dedicated Linux mini PC, and it is worth pricing that in if nesting and G-code editing matter. A homing kit with 3 proximity sensors, torch height control, a magnetic breakaway, a collision switch and ohmic sensing are standard. The plasma cutter is not included.
Full Specifications
| Parameter | Value |
|---|---|
| Cutting Area | 12 ft x 6 ft (3,658 x 1,829 mm) |
| Max Plate Thickness | 2 in (51 mm) steel plate |
| Machine Weight | 2,100 lb (953 kg) |
| Water Pan Capacity | About 167 gallons (632 L) |
| Water Pan Depth | 3 in (76 mm) |
| Gantry Clearance | 5.75 in (146 mm) |
| Z Axis Travel | 5.5 in (140 mm) |
| Frame | Welded open tubular frame with welded leg supports; no assembly required |
| Gantry | Assembled, extruded aluminum gantry |
| Drive System | Standard rack and pinion with standard linear guide assembly (gantry and table) |
| Motor System | 3 stepper motors with 3:1 ratio gear reduction, plus Z-axis linear stepper motor positioner |
| Z Axis Drive | Precision ground billet ball lead screw |
| Motion Accuracy | About 0.002 in per 12 in (0.05 mm per 305 mm) |
| Step Resolution | +/- 0.0005 in (0.013 mm) |
| Homing | Automatic homing kit with 3 proximity sensors |
| CNC Control | MyPlasmCNC (downloadable software, Windows PC required); Optimum CNC control system available as an upgrade |
| Controller Connectivity | USB |
| Slats | Interchangeable 1.5 in (38 mm) flat bar slats |
| Torch Height Control | Included |
| Table Power | 110 V, 20 A |
Specifications sourced from stvcnc.com — verified 2026-10-05
Strengths & Limitations
Strengths
- Welded frame and a single welded water pan: no owner assembly and no sealed pan joints
- Rated for 2 in steel plate, with 5.75 in of gantry clearance
- Automatic homing kit with 3 proximity sensors and gantry carriage shields are standard
- Largest standard envelope in the series at 12 ft x 6 ft
Limitations
- Ships fully built on a flatbed, and a forklift is required at delivery to unload it
- Z travel is 5.5 in under a gantry with 5.75 in of clearance, so tall weldments and deep tube will not pass
- About 167 gallons of water and the longest floor run in the range
- Sheets of this size need crane or forklift handling
Best For
Frequently Asked Questions
01
12 ft x 6 ft. That is the largest standard size STV CNC lists in this series, and it is rated for steel plate up to 2 in thick. Custom sizes are handled separately under the maker's build-to-suit line.
02
Fully built. STV CNC ships its PRO welded frame tables assembled by flatbed hotshot truck, and states that a forklift is required at the delivery address for unloading. Nothing has to be bolted or sealed by the owner, which is the main difference from the modular SparX tables.
03
The table weighs 2,100 lb and ships built, so unloading equipment has to be on site. The pan takes about 167 gallons of water, the table electronics need 110 V, and the plasma cutter needs its own supply. Leave a clear path for 12 ft material.
04
MyPlasmCNC is standard. It is downloadable software that runs on a Windows PC supplied by the owner, connected by USB. STV CNC offers an upgrade to its Optimum CNC control system, which comes with a Linux mini PC that has the software pre-installed and is dedicated to running the table.
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