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Gryphon precision robotThe Gryphon robot (Fig. 1) forms part of a family of robots designated by the Walli group of robots, which are products of Italtec Company, Italy. Gryphon is a conventional robots emulating the movement of the human arm and hand and having axes for rotation about the shoulder, elbow and wrist in the forward plane. The wrist has two axes, effective for rotation and elevation. There are five in all axes and a gripper. Either a two-fingered or a vacuum gripper may be fitted and these may be readily interchanged. The gripper requires an air supply with a pressure of about 5 to 8 bar. The gripper entry is either 0 or 1, indicating open or closed for the pneumatic gripper actuated.A control box is supplied together with the robot. Any other compatible devices may be connected to form a workcell via the control box. Each axis is powered by a stepper motor with optical encoder feedback to provide closed-loop control. The articulated arm is under the control of four microprocessors and, if properly programmed, will accurately work with components in a workcell. The processors are in communication with the host processor via a serial link well-formed from four twisted pairs, to a RJ45 Interface Board in the host computer (Fig. 2). This board is the preferred means of communication between the host PC and the control box and is used for all digital control systems. But for the Gryphon robot it is the only means of communication between the robot and the host computer. The RJ45 interface is a proprietary design for serial transmission and uses a pre-installed cable with a well-formed standard RJ45 plug at each end.Programming may be accomplished in a variety of ways. Data for each axis may be directly entered on-screen, using WALLI3 software. Alternatively, the Gryphon robot may be moved by a teach pendant or by hand (lead-by-the-nose).
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