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3) When turning over Clearance Impact load Turning over 1) Stroke end when fingers are opened With clearance Without clearance Clearance Clearance Impact load 2) Stroke end when gripper is moving With clearance Without clearance Clearance Clearance Impact load Aligned Not aligned Impact load Mounting Caution 1. Avoid twisting the gripper when mounting an attachment. Any damage to the gripper may cause malfunction and reduce the accuracy. 2. Avoid external force to fingers. Fingers may be damaged by a continual lateral or impact load. Provide clearance to prevent the workpiece or the attachment from striking against any object at the stroke end. Air Grippers Precautions 2 Be sure to read this before handling. 3. Adjust the gripping point so that an excessive force will not be applied to the fingers when inserting a workpiece. Confirm that the gripper can operate without receiving any shock by testing it in manual operation mode or by low speed operation. 4. Control the opening/closing speed with the speed controller to avoid excessive highspeed operation. If the finger opening/closing speed is greater than necessary, impact forces on the fingers and other parts will increase. This can cause a loss of repeatability when gripping a workpiece and have an adverse effect on the life of the unit. When an angular gripper is used, depending on the length of the attachment, it might be necessary to adjust the open/close movement to a slower speed. This will prevent the base of the fingers from being exposed to shocks that are created by inertial force. Finger Opening/Closing Speed Adjustment Example of Using SMC’s Speed Controller Guide to Built-in Needle Adjustment Applicable speed controllers Air gripper mounted type AS1200-M3/M5 AS2200-01, etc. Piping type AS1000 series AS1001F, AS2051F, etc. Double acting Model Number of needle rotations from fully closed state (.) MHC2-10 MHC2-16 MHC2-20 MHC2-25 MHK2-12D MHK2-16D MHK2-20D MHK2-25D MHKL2-12D MHKL2-16D MHKL2-20D MHKL2-25D Single acting Connect one speed controller, then adjust the speed with the meter-in control. External gripping Connect to closing port. Internal gripping Connect to opening port. . The speed can be adjusted with the built-in speed controller in the following series: MHC2-10D to 25D, MHK2-12D to 25D and MHKL2-12D to 25D. Use the table below as a guide for adjusting the speed. . Series other than those previously mentioned For a cylinder with an inner diameter of o6 and o10, connect 2 speed controllers in a meter-in state or 1 dual speed controller. If the cylinder has a bore size of o16 or larger, connect 2 speed controllers in a meter-out state. (.) Needle is tightened until it strikes the end lightly. 1/4 to 1/2 1/2 to 1 1 to 1 1/2 1 1/2 to 2 3/4 to 1 1 to 1 1/4 1 1/2 to 1 3/4 1 3/4 to 2 1 to 1 1/4 1 1/4 to 1 1/2 1 3/4 to 2 2 to 2 1/4 30