[Cyclone type o60] 0 1 2 3 4 5 6 7 8 9 10 Distance from the workpiece (mm) Lifting force (N) 30 25 20 15 10 5 0 0.4 (MPa) 0.3 (MPa) 0.2 (MPa) 0.1 (MPa) Selection Procedure 1) Check the kind of workpiece and also its size and weight. 2) Check the guide corresponding to the transfer method of the workpiece and “Selection” (Page 7). At the same time, check the distance between the workpiece to be set and the non-contact gripper. 3) Check the supply pressure applied to the non-contact gripper. 1) Clarify the lifting force corresponding to the distance between the workpiece and the non-contact gripper for each supply pressure. Example: For the case of “Cyclone type o60,” a supply pressure of 0.2 MPa, a workpiece mass of 50 g (0.49 N), and a 1 mm distance between the workpiece and the non-contact gripper From the “Cyclone type o60” graph, check the lifting force from the intersection of a 1 mm distance between the workpiece and non-contact gripper and a supply pressure of 0.2 MPa. Then, extend a horizontal line from this point to the vertical axis to obtain the lifting force. 2) Multiply the final lifting force by a safety factor and decide the temporary lifting force. Obtain the temporary lifting force by using the following equation. (Note: The temporary lifting force is the lifting force that has been set after taking into account the safety factor used for selecting a noncontact gripper.) F = f x (1/t) F: Temporary lifting force (N) f: Lifting force (N) t: Safety factor … 2 or more 3) Compare the final lifting force and workpiece mass, and determine the size and number of non-contact grippers such that the temporary lifting force . workpiece mass. If the temporary lifting force . workpiece mass, the gripper can be used under these conditions. If the temporary lifting force < workpiece mass, either increase the size of the non-contact gripper, or increase the number of grippers to be used. Obtain the required number of grippers from the following equation. N = (9.8 x W/1000)/(1/F) … Rounding up to the nearest higher integer N: Q’ty (pcs.) W: Workpiece mass (g) F: Temporary lifting force (N) 9.8: Gravitational acceleration (m/s2) Determine the positions of the non-contact grippers according to the number of grippers to be used, taking into account the balance of the workpiece. If the balance of the workpiece is poor during lifting, either increase the size of the non-contact gripper, or increase the number of grippers to be used. * The above shows selection procedures for general non-contact grippers; thus, they will not be applicable for all grippers. Customers are required to conduct a test on their own and to select the size of the non-contact grippers and the non-contact grippers to be used based on the test results. 1 Check the workpiece and operating conditions. 2 Check the lifting force. 3 Determine the layout of the non-contact grippers. 5 Series XT661 Model Selection