How to find the focal spot of razortek laser welding machine

The laser focus spot is setting correct when we packaged the machine, but you should to know how to find the focal spot

Here is the solution:

1. Find 2mm thickness Stainless steel sheet. Setting power 500. Scanning with 2.8,scanning speed 300

2. Connect the circuit,and loose the nut of laser head, put the scale tube  Retract to the bottom. As below picture showed,move the s.s steel from far to near, find the distance that the laser can cut through the sheet,then adjust the pipe position, then test again

If use wire when welding , we need put the scale tube go in a little bit, so ensure the focal spot superposition with wire

Here is the summing up , you can fine adjust
Scale tube with ruling -4, for interior angle welding  ,flat sheet welding, exterior angle welding with wire feeder
Scale tube with ruling 5 ,without wire feeder welding .
Scale tube with ruling -1, for galvanized sheet with wire feeding

Galvanized sheet without wire feeding .
Scale tube with ruling 3.  joint welding
Scale tube7, Exterior angle welding
Scale -10,interior angle welding