The welding seam looks like the welding frequency is wrong. Heavy vibration (spatters) and noises during welding.

Possible cause:

  • Check the wire groove, maybe the profil is not straight anymore (see also if short near the seam).
  • Too much welding current.
  • Too low welding frequency.
  • Check the tension the belt for the profiling unit and pendulum rollerhead.
  • Servo drive transport belt: Check if the whole transport belt  unit is vibrating during positioning. If yes: Change the drive gear on top the servo motor.