Research on Adjustment Device to Find Zero Position for Rotary Encoder

The adjustment device was designed in order that rotary encoder could be installed at zero position.The adjustment device was composed of a electronic handwheel,a step motor,a helical gear,a worm and a magnetic table block.The helical gear was installed on hollow shaft of rotary encoder,the magnetic table block was fixed on automated equipment by means of magnetic suction,the worm was installed in axle sleeve,which was clamped in elastic hole chuck of the magnetic table block.Output signals of the electronic handwheel was connected to step motor driver,the worm was driven by the step motor,which rotated following the electronic handwheel.The helical gear was driven by the worm,the hollow shaft of rotary encoder was driven by the helical gear.At the same time,output signals of the rotary encoder was read by software and used to judge whether the rotary encoder was at zero position.The rotation of the electronic handwheel was stopped immediately if the rotary encoder was at zero position.Experimental results show that the rotary encoder can be installed at zero position efficiently and easily with the adjustment device.