AWS J1.2M-J1.2:2016 pdf download.Guide to Installation and Maintenance of Resistance Welding Machines
1.1 Scope. While resistance welding machines vary considerably in size and complexity, there are basic principles applicable to the installation, operation, maintenance, and troubleshooting. This document is intended to provide basic information to the users of the resistance welding equipment to supplement the instructions and recommendations of the equipment manufacturer. Where there is confict, the equipment manufacturers' document shall take precedence. Although this guide is not written with mandatory requirements, mandatory language, such as the use of“'shall," will be found in those portions of the document where failure to follow the instructions or procedures could produce inferior, misleading,or unsafe results.
It is the responsibility of the resistance welding equipment user to ensure the equipment conforms to relevant electrical,mechanical, and operating safety standards.
Further assistance relating to interpretation or applicability of any of the suggestions outlined in this guide shall be obtained from the original machine manufacturer, rebuilder, integrator, other organization or individual qualified to make such a determination.
4.4 Setup. After the equipment is set in place, consult the operator's manual or the manufacturer prior to beginning the setup procedure. Remove all shipping tie-downs, brackets, and blocks, paying attention to ensure part clamping mechanisms or other moving members do not descend upon personnel. Separately mounted units should be located and interconnected in accordance with the manufacturers' instructions. It is advisable to leave protective masks, barriers, and temporary guards in place until it is necessary to remove them as manufacturer recommends. If it is necessary to perform elevated work, a ladder or scaffold should be employed instead of climbing on the machine.
4.5 Utility Connection. Generally, three services will be required: electrical power, compressed air and cooling water.The following sections give some general guidance relating to the supply requirements and connections. However, if the machine is part of a larger system of machines, the requirements for services that supply the system may be different. The connections must follow all applicable federal, state, and local codes.
In general, the welding machine should be protected from any cutting, welding, or installation, which may cause damage.All electronics must be free of installation debris such as metal chips and wire scraps. The use of compressed air to aid cleanup is discouraged. Service lines for air and cooling water should be purged or cleaned before any connections are made to ensure contamination is not introduced into the welding machine. The individual services should be locked out according to a proper procedure until it is time to apply energy to the welding machine and begin the commissioning process. Contact the welding machine manufacturer or an experienced contractor if the requirements of the utility services and connections are not well understood.AWS J1.2M-J1.2 pdf download.