When the machine is working, the motor often starts and stops. The fuse is easily blown under the impact of the start of the motor and the high current of the reverse brake. In order to repair it in time, sometimes the maintenance personnel replace the fuse is not standard, especially the original fuse. The core tube of the device is crimped to the lead wire, and the contact is poor due to the small crimping surface and the pressure is not tight, resulting in an increase in contact resistance and an increase in current, which is more likely to burn out and cause the motor to run out of phase. If you replace all the new cores, it is too wasteful. Long-term practice has proved that the protection of thermal relays is very unsatisfactory. Thermal relays are seriously malfunctioning due to seasonal changes and changes in ambient temperature. They do not cooperate due to frequent or reverse operation, and automatically fail due to environmental pollution and corrosion. Plastic deformation occurs due to multiple impacts of starting current or short-circuit current. And defects such as failure. In view of the above reasons, we have modified some electrical circuits of the X6225 machine, eliminating the fuses and thermal relays in the original line, and using the M611 motor protection switch produced by Suzhou Electric Control Equipment Factory for short-circuit and overload protection of the motor. In the case of electrical circuits, in addition to using a set of main contacts for the main circuit, an auxiliary normally open contact that is linked to its main contact is used. As shown, the auxiliary normally open contact is used to protect the machine tool. The control circuit is specifically placed in the front end of the machine control loop by placing the auxiliary normally open contacts of the four M611 switches in series with the emergency stop button contacts, so that when any motor is blocked or overloaded, M611 protection The switch action, the main contact cuts off the main circuit, and the auxiliary normally open contact cuts off the control loop power supply, thereby protecting the machine tool safely, effectively and quickly (the medium-QM01-QM04 is the M611 motor protection switch, and the SB01 is the emergency stop button). , -SQ01, -SQ02 are the travel switch). (Finish) To obtain perfect joins, inside of the solder ring copper fitting and the outside of the copper pipe are cleaned using coarse steel wool, flux paste is applied, the pipe is then inserted into the fitting and heat applied from a portable propane torch until a ring of solder shows at the edges of the fitting. Sizes we have available are from 8mm to 54mm For EN1254-1 and 1/2" to 2" for ASME B16.22 ,solder ring Copper Fittings,presolder copper fittings,yorkshire copper fittings,pegler copper fittings,connex copper fittings solder ring copper fittings,presolder copper fittings,yorkshire copper fittings,pegler copper fittings,connex copper fittings Taizhou Runde Company , https://www.nerausmotor.com