Many galvanometer scanning systems are controlled by PC based programs acting through a specialized hardware controller. Traditionally the PC performs most of the computation required to transform user data (e.g. graphics, text) into signals for the scanners and the laser. The hardware controller is responsible for the real time execution and synchronization of the signals. This paradigm works well for hand loaded and standalone workstations, and can be used in an automated lines. Recently the PC has become increasingly unwelcome in the automated environment. Concerns about the PC include reliability, tampering, connection problems, and the space required for the keyboard and screen. Since many of the laser operations performed on an automated line are repetitive, standalone controllers that can operate without need for a PC are preferred.
Nutfield Technology now offers the Surfboard II which can run either with the PC or completely stand alone. Up to 256 job files can be created and transferred to the card and jobs selection can be managed via hardware IO. The hardware IO can be configured to interact with other devices for handshaking and synchronizing functions, and can control motion devices such as XY tables and rotary axes.
While the card needs no data connection to operate during run time, it can be connected to a host controller via Ethernet, USB or RS232. With one of these connections in place the host can select jobs, store new jobs, and manipulate entities within jobs. The latter is useful if there are fiducial references or other metrology used to precisely locate marks onto a work piece. Where multiple lines are used, a common job file can be stored in a network folder insuring that all lines are receiving the same data. Using the cards in standalone mode also means that only one license of the Waverunner job editing software is needed for job creation and editing, which provides a significant savings.
Additional features of the Surfboard II include:
- dedicated step and direction outputs for stepper motor control
- enhanced IO including both digital and analog capability
- multiple scan head operation from a single controller
- two axis Mark on the Fly
- ability to DIN rail mount
- compatibility with all Nutfield Technology scanning products