Magnetic Sensor Orientation Control9 -109.7 Magnet and Magnetic Sensor MountingsThe Magnet is mounted directly to the load shaft as shown in the following diagram. The Magnetic Sensor ismounted to a part of the load shaft that does not rotate, but must be mounted so that the positioning of the centerof the Magnet agrees exactly with the center of the Magnetic Sensor.J Mounting DiagramMounting panel(panel width 8 mm max.)MG-1378BS MagnetFSH-1378CMagnetic Sensor(a) MG-1378BS/FS-1378CMG-1444S MagnetFS-200A Magnetic Sensor Magnetic Sensormounting panel(b) MG-1444S/FS-200ALnS 1RδnS 2LLnS 1RδnS2LFig 9.12 Magnet and Magnetic Sensor Mounting Diagram 1J Mounting DimensionsThe mounting dimensions for the above diagram are shown in the following table.Sign Name MG-1378BS/FS-1378C MG-1444S/FS-200AR Radius of rotating partmounted to the Magnet *1 60 to 70 mm 60 to 70 mmL Gap (between center ofMagnet and MagneticSensor) *26 mm (6 to 8 mm) 5 mm (3 to 7 mm)∆L Gap (between tip of Mag-net and Magnetic Sen-sor) *21 to 2 mm 1 to 2 mm∆S 1 and ∆S 2 Magnet and center ofMagnetic Sensor are nolonger aligned. *30.5 mm max. 0.5 mm max.δ Angle of misalignmentfrom base surface.*3 0.2_ max. 0.2_ max.* 1. When specifying the radius of the rotating part mounted to the Magnet, consider the maxi-mum speed tolerance of the Magnet.* 2. The value of L is the recommended value. Adjust the gap to satisfy the value of ∆L.* 3. When the mechanical central shaft (e.g., the spindle nose key in the machining center) hasbeen matched, make sure that the center misalignment of the Magnet and Magnetic Sensor,as well as the standard of accuracy of the emitter mounting, have been satisfied. Make surethe base surface is parallel to the tangent at the point where it crosses the circumference ofthe rotating part mounted to the Magnet and the Magnet centerline.Fig 9.13 Magnet and Magnetic Sensor Mounting Diagram 29
