Handheld Fiber Laser Welding Machine

Welding Head Problem: No Trigger Signal

Mar 04, 2022

When the trigger button is pulled, the detection page [Laser Trigger Signal] is displayed in gray

Cause Analysis:

When the trigger is pulled, the 7/8 pins of the signal interface 1 should be in a conductive state. When there is an open circuit or an internal problem on the main board, it will be displayed in gray. The structure is as shown below.


①At the same time, test whether the safety lock signal is normal. In some cases, the aviation socket is loose, which will result in no two signals. The aviation socket is located 80cm behind the wire of the welding gun.

② Directly short-circuit the 7/8 pins of signal interface 1. If it is turned on, there is no problem with the main board. Continue to the next step.

③ Disassemble the button and measure the continuity between the button and the terminal. In some cases, the line is broken.

④ When there is no problem with the above, most of them are the problem of the button itself, such as poor contact, etc., the button needs to be replaced

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