Mounting bolt Usable fitting ・ Thread O.D.: o8 or less Width across flats: 8 or less Impact Impact Wind pressure Acceleration Wind pressure Acceleration Wind pressure prevention cover There is no restraining force in the horizontal direction. Horizontal movement Horizontal movement Restraining force in the horizontal direction by means of a guide Area of workpiece Size of non-contact gripper Area of workpiece Size of non-contact gripper > < Moment Positions of the non-contact gripper and workpiece Positions of the non-contact gripper and workpiece Positions of the non-contact grippers and workpiece Positions of the non-contact grippers and workpiece Selection Precautions for Each Kind of Workpiece Other Precautions Acceleration/Wind pressure/Impact When transferring the workpiece, take into account not only the workpiece mass, but also acceleration, wind pressure and impact as well. (Refer to Fig. 1.) Particular care must be taken in the case of a flat plate that has a large area. It is necessary to adopt measures such as the installation of a wind pressure prevention cover. Also, even if the relationship temporary lifting force . workpiece mass is adequate, select a larger size that provides a degree of margin. The stability of the lift with respect to acceleration, wind pressure and impact generally increases in proportional to the diameter. Workpiece with holes Depending on the size and distribution of the hole, it may be impossible to lift the workpiece. To ensure that the workpiece is lifted, the total area of the holes versus the suction area (aperture ratio) must be 1% or less. However, the lifting force will be reduced, so it is necessary to use an appropriate supply pressure and an adequate safety factor. Workpiece that has concave/convex surfaces Depending on the size of the concave/convex surfaces, it may be impossible to lift the workpiece. It is necessary to use an appropriate supply pressure and an adequate safety factor according to the workpiece mass. Regarding the XT661-2A, there is a limit to the size of the fitting for the supply port that can be used. Use a fitting whose connection thread O.D. is o8 or less and whose width across flats is 8 or less. If greater sizes than these are used, the fitting may interfere with the head of the mounting bolt. Thin workpiece If the supply pressure is higher than the necessary value, the workpiece may be deformed or damaged due to the lifting force. There is also a possibility of the workpiece vibrating. To prevent this, do not set the supply pressure higher than necessary. Soft workpiece As soft workpieces are easy to deform, there is a tendency for the workpiece to touch the bottom of the non-contact gripper. Please be aware that the workpiece may touch the gripper before using. Horizontal force A non-contact gripper does not produce a restraining force that prevents horizontal movement of the workpiece. It is necessary to install a guide at the end of the workpiece. (Refer to Fig. 2.) Size of the non-contact gripper and workpiece Use a non-contact gripper that has an area of less than that of the workpiece. If the area of the gripper is greater than that of the workpiece, a vacuum zone will not occur, so a lifting force will not be generated. (Refer to Fig. 3.) Balance of the workpiece Install the non-contact gripper at a position such that a moment is not created from the workpiece. (Refer to Fig. 4.) Also, when lifting a flat plate that has a large area with multiple non-contact grippers, install the grippers in such a way that they are well balanced with respect to the workpiece mass. (Refer to Fig. 5.) Mounting orientation The basic mounting direction of the gripper is horizontal. If the gripper is mounted obliquely or vertically, it must also install a guide and use an adequate safety factor (2 or more). Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 7 Series XT661