The first level for alarm, the second for downtime. Such as switch FM2035 wandering vertical roll Angle up to 20 ° when will send out alarm signal, when reach 35 ° signal downtime. Which could be achieved by two aspects. 1. Through the inclined installation, let the switch itself Angle offset, can reduce the running deviation alarm and stop the Angle of the switch. 2. To the inside of the shell of micro switch Angle adjustment, realize vertical roll by small Angle offset realize running deviation alarm and stop function. 

Opposing roller attached regularly to remove dust, at the same time, confirm the vertical roll wear and tear will be replaced during the more than 2 mm.after replacing the roller, plstighten the nut.Fisher’s belt sway switch with IP67 protection grade and imported from gas bearing, no lubrication and maintenance.