FINN-POWER, represented in Australia by Advanced Sheetmetal Technologies , has released the L6 4000W laser cutting centre that uses a flying optics laser for maximum speeds, even in small notches or narrow contours.
Its flying-optics/moving-beam system is driven by a linear drive motor system, ensuring high speeds due to low friction and a frame construction that eliminates technical problems such as the risk of contamination and heat generation.
The rigid frame design withstands all the forces of high-speed positioning and provides a solid base for stable beam delivery optics.
The Ping Pong repositioning system which hops in loops rather than straight lines, allowing smooth and fast transitions and increased productivity. The CO2 laser has a resonator and resonator frame construction built straight onto the machine frame, offer several pulsing modes to benefit the cutting process.
Advantages include dc excitation with a high efficiency factor, integrated laser power measurement, an oil-free gas circulation and gas pump, low energy consumption and an extended maintenance interval.
The system is designed to reduce maintenance costs. A transmissive telescope optic has been replaced by an adaptive optic and a new exhaust system filters for up to 25,000 hours. The flying-optics/moving-beam system has a working area of 3,000mm X-axis, 1,500mm Y-axis and 100mm Z-axis. Positioning of the shuttle tables is possible on two sides of the machine.
The operator is protected against moveable machine parts, the laser beam, deflected laser beams and metal splatter. The productivity of the cutting system is increased with an automatic shuttle table system. Loading and unloading of the sheet is executed during the cutting operation.
The shuttle table automatically moves the cut sheet into the unloading position and a new sheet on the other table moves into the cutting area. Light beams surround the shuttle table. The complete cover of the L6 allows the operator to access to the shuttle table from any side while the system is running.
Focal lens change time has been reduced using a high-pressure cutting head integrated into the system. This provides a constant distance between the material surface and the nozzle, achieving a non-contact, capacitive integrated sensing unit. The cutting head does not have to change when a focal lens change is required, only a new lens cartridge has to be inserted.
Laser beam delivery is performed with two external mirrors. The positioning speeds of the X and Y axes are up to 300m/min. Accuracy is ± 0.025 mm and energy consumption is low. The system can handle 20mm-thick mild steel, 12mm stainless steel and 8mm aluminium.
If the sheet is not correctly positioned, a sheet probing function allows detection of the location of the sheet on the machine, calculation of the angle to rotate the nesting, calculating of the zero point of the sheet and checking the size of the sheet. When the probing cycle has ended the machine starts to execute the program.
When processing thick mild steel applying an oil mist to the sheet before piercing prevents splatter sticking to the sheet. After piercing the splatter around the piercing area will be blown away by compressed air.
As an option, the L6 laser work centre allows cost-efficient unmanned operation of the fabrication process including raw sheet storage, loading and unloading. It also allows manual handling where more appropriate.
Sheet and component handling is preformed by suction cup grippers with automatic setting for alternative sizes of raw sheet.