LaserParamsFiber laser troubleshooting: the problems I get called about
Longer write-ups on the problems that keep coming back — cut quality, alarms, gas and optics. Each one follows the order I actually check things in.
Laser cuts then stops: why a cut dies halfway through
A cut that starts clean and dies mid-way is a changing fault, not a missing one. Heat, gas sag, nozzle soot or the program.
Read →2026-10-22 · 6 min readLaser not cutting through: the order I check things in
Not cutting through describes what you see, not what is wrong. Here is the order I work through on a real call, before anyone opens the parameter table.
Read →2026-10-22 · 3 min readPower dropping with no alarm: where the loss actually is
The source reports normal output, the cut gets weaker, and nothing faults. Most of the time the energy is being lost between the source and the workpiece.
Read →2026-10-12 · 3 min readDross on the bottom edge: the order I actually check things in
Slag clinging to the underside means the melt was not blown clear. Here is the order I work through on a real call before anyone touches the parameter table.
Read →2026-10-05 · 4 min readRed beam off centre on a fiber laser — what it tells you
A red guide beam that is visibly off centre, diverging or irregular is not cosmetic. It is the cheapest alignment test you own, and it comes first.
Read →Same problem on your machine? Send a video — I will tell you what to check first.