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GTCO – Digitizers
A digitizing tablet, is a computer input device that allows one to hand-draw images and graphics, similar to the way one draws images with a pencil and paper. These tablets may also be used to capture data or handwritten signatures. A graphics tablet (also called a digitizer) consists of a flat surface upon which the user may “draw” an image using an attached stylus, a pen-like drawing apparatus. The image generally does not appear on the tablet itself but, rather, is displayed on the computer monitor. A digitizer is a tablet or board-like device for converting analog electric signals of an absolute or relative position on the tablet surface to digital X, Y coordinates. This process yields vector data consisting of points, lines, and polygons that will need to be edited. By positioning a pointing device containing a magnetic coil (cursor or pen stylus) on the tablet surface which is embedded with a grid of wires, a signal is generated. The resolution, or density of wires in the grid, vary from 1,000 to 10,000 lines per inch. Active surface sizes vary from 12 x 12 (A size) to 48 x 72 inches (E size).
The GTCO/Calcomp digitizer is separate entity from The EDGE. They work independently of each other until such time as you open the Drawing or Detail screen.
The EDGE Systems and GTCO Corporation have had a successful business relationship for well over 20 years. GTCO digitizer boards have proved reliable, accurate and long lasting. Some of the earliest produced boards are still working. Beginning with the SL-III series GTCO switched from using a dedicated power supply to using a USB cable to supply the board with its power. You should NEVER repeat NEVER connect both type of power cords at the same time. Only use one or the other.
Used boards can be purchase off the internet but we caution clients about making such purchases. First, all manufacturer warranties are voided. Secondly, spare or replacement parts may no longer be available for the SL-II and SL-II+ boards so if you purchase one of these and it goes South on you, so does the money you spent to buy it.