variMODE allows you to tailor your Fiber Laser system to optimise the beam characteristics (including spot size and beam profile), specific to your application, whether that be cutting, welding, piercing or additive manufacture.
This dynamic controllable beam profile, brings significant advantages to the user, enabling processing step changes ‘on the fly’ to help improve production speeds and reduce costs. variMODE is available within the redPOWER range as an option on all high power QUBE lasers, offering a dynamic switchable choice of laser beams from a 100µm delivery fiber, whilst maintaining spot size.
Based on an internal, all-in-fiber device that modifies the spatial modes in the delivery fiber, this innovative approach uniquely maintains beam delivery totally through the central core of the fiber, removing the need for complex and expensive additional optical components and ensuring maximum power is maintained across the beam profile regardless of the chosen mode.
This is achieved by controlling the output beam divergence and thus beam quality. This variability is all controlled inside the laser with no need for any external optics. Fitted with a Ø100µm delivery fiber, the beam quality can be switched from 3.2 mm.mrad (M2 9.5) to 5.8 mm.mrad (M2 17), as shown in table 1.
The lower beam quality 5.8 mm.mrad has been set to match the NA of standard commercially available cutting heads, to ensure that all of the laser power is delivered to the sheet metal and that beam clipping does not occur within the cutting head. The switching time from low to high beam quality is typically 30ms, which is fast enough to be changed between piercing and cutting.
- Select in real time the beam that’s best for your process
- Simple user interface for optimal control and integration
- Faster process speeds and better cut quality
- Improved system flexibility, enabling processing of a wider range of materials and thicknesses
- ‘All in fiber’ process, negating the need for extra optical components that increase complexity and risk
- Utilise the full laser power in all modes
- Can replace zoom focus head, reducing weight and cost
Switch Beam Profiles 'on the fly' in less than 40ms
Optimised for high speed, high quality piercing in thick sheets whilst giving fastest cut speeds for thin metal sheets of stainless steel, aluminium and copper.
Optimised for cutting through thick metal sheets at high speed, producing an excellent surface finish on mild steel.
Improvements to Sheet Metal Cutting with a High Power, Variable Beam Quality Fiber Laser
Laser cutting of sheet metals is a well established production method, with many thousands of cutting systems operating worldwide. In the last 10 years solid-state fiber-coupled lasers such as fiber and disk systems have become the laser of choice, replacing the CO2 laser used in many older systems. In both cases the machines operate in a similar manner, using a cutting head to focus the laser beam onto the sheet metal through a conical nozzle with co-axial high pressure assist gas……
To read the full article written by Paul Harrison, Chief Engineer for Product Applications: CLICK HERE.