Laser Scanning Heads
Laser scanning heads are the next most important factor in laser marking systems after laser power units. The task of a galvo scanning head in the marking system is to position the laser beam at very high speeds within the given area calibrated by a combination of hardware and software, thanks to the signals from the control units. This electronic and software orientation or ray steering job is done based on the X, Y and Z axial coordinates of the given graphic or text content on the marking programme. Optical scanning heads incorporate advanced optical and electronic technologies. It contains at least 2 galvo motors (high-speed angular servo motors), drivers for motors, beam mirrors, XY (Z) analog or digital signal converters and at least one optical lens kit.
Auto focus system of Laser Marking Machine which will help you find focus distance easier. Most of the laser marking machine need to find the focus manually, they have a handle wheel on top of the lifting pillar, you need ajust the height of laser head manual to get the focus right, then the laser will work correctly, so Auto focus system will help you on doing this automatically. Auto focus laser marking machine also named auto focus laser engraving machine, laser marking machine with auto focus system, auto focus laser engaver, fiber laser marking machine with autuo focus
The galvo is a set of two motor driven mirrors that steers the laser beam through a lens. The lens will determine the process field. The lens can be “F-Theta” or not. The F-Theta lens attempts to keep the beam perpendicular to the marking surface no matter the size of the lens and ultimately the process field. The lens will determine the process field size.
Non “F-Theta” lenses are used from vendors to save cost. Be aware of field and result differences as the laser beam is a pendulum and therefore focus becomes an issue at the field extents and the beam becomes egg shape instead of circular.