
SL FF RB
CNC Welder with Single Head for 180° Reverse Butt Joints
The first CNC welder for frames with a 180° inline cross member
Perfect if:
- Weld frames and cross members aligned at 180° in a single cycle.
- Eliminate post-welding cleaning and manual touch-ups.
- Working with PVC using films, paints, acrylics, laminates, and aluminum or wood coatings.
- Reduce space, working hours, and labour.
- Automatically compensate for profile tolerances
Request the technical brochure now or speak with an expert.

The first CNC welder for frames with a 180° inline cross member.
SL FF RB is the first CNC welding machine with a single head designed to perform 180° reverse butt welds, which means it can join PVC frames and crossbars in a straight line, ensuring a perfectly flat and continuous surface.
Equipped with V-Perfect technology, it can weld complex and coated profiles without leaving visible seams, even when working with non-weldable materials such as fibre, aluminium, or resins. In just one cycle, it produces a complete frame that is aesthetically flawless and ready for assembly.
5 Reasons to Choose SL FF RB
- Suitable for all materials and finishes. Perfect for profiles with anodised, acrylic, painted, or wood/aluminium coatings.
- Welds, finishes, and delivers. Eliminates the need for a cleaner, rotary table, or touch-ups: the piece is complete on the first try.
- Labour Reduction. It requires just one operator to load the profiles: everything else is automated.
- Minimal footprint. Compact design optimized for small spaces.
- Integrated Automatic Calibration. Automatically compensates for dimensional variations of up to 2 mm.

Product Details
The SL FF RB is the first CNC welding machine with a single head designed to perform 180° “reverse butt” welds, ensuring a seamless and perfectly flat connection between PVC frames and crossbars.
Machine dimensions
Length: 2,300 mm
Width: 2,000 mm
Height: 2,700 mm
Weight: 1.400 kg
POWER SUPPLY and Consumption
Installed power: 6 kW
Voltage: 415 V
Air consumption per cycle: 600 NI/cycle
Operating pressure: 7 bar
Operational Features
Composition: 1 CNC Head
Welding Type: Frame joint + 180° cross (reverse butt)
Operators needed: 1
Cycle time: up to 1 weld every 140 seconds
Working dimensions
Weldable side:
- Minimum: 300 mm
- Maximum: unlimited (no machine limit)
Weldable profile:
- Height: 60 – 100 mm
- Width: 60 – 110 mm
Available options
- Cordless Welding Fume Extractor
TECHNOLOGY AND AUTOMATION
SL FF RB uses V-Perfect technology to create completely flat joints, free of seams or visible defects.
CNC automation allows for the adjustment of all machining parameters and compensates for profile tolerances, ensuring consistent aesthetic quality even on unconventional materials.
It’s the ideal solution for custom productions, complex fixtures, or assembly lines where aesthetic quality makes a difference.
Contact us to find out if the SL FF RB is the right solution for your production.






