Over the past few years we have received tech support questions from some customers describing an infrequent pilot arc misfire on their Razorweld RAZORCUT 45 machines purchased from us. This misfire condition is characterized by the torch being commanded to fire in software but the pilot arc does not flash on and the plasma cutter blows air only. This misfire condition appears to be random and seems to be more frequent when cutting with a new set of consumables until they are properly ‘seasoned’. It does not affect all plasma cutters only some at random as far as we can tell.
This misfiring condition can be tested by removing the torch from the CrossFire torch mount and dry firing the plasma cutter in the air by hand in rapid succession. If your plasma cutter is experiencing this issue, you will notice that every so often the pilot arc will not come on and only air will blow out of the plasma cutter.
Customer satisfaction is always our number one priority and we have worked with Razorweld to determine the root cause of this issue as we understand that misfiring can be very frustrating when cutting on a CNC plasma machine. During investigation, it has been determined that this issue is
caused by improper timing delay between the electrode start current and the air solenoid valve.
Fortunately, a field repair using off-the-shelf supplies can be easily performed to fix the issue. Razorweld has issued the attached TECHNICAL BULLETIN that describes how to repair your plasma cutter at home if you are experiencing this issue and want to fix it yourself. RW45 MISFIRE TECH BULLETIN.pdf (994.5 KB)
If after reviewing the TECHNICAL BULLETIN you are confident that you are experiencing this issue on your RAZORCUT45 machine but do not feel comfortable performing the repair yourself, you can contact email@example.com to facilitate a repair at their warehouse. We ask that you please ensure that your misfire is not caused by incorrect operating procedures such as dirty air, irregular Air pressure or worn out consumables and that your machine is not in Air check mode or inconsistent input power commonly caused by running your Plasma cutter on an extension lead.
Thanks again and happy cutting,
The Langmuir Team