The APN1 serves as a mechanical seam tracking system for electric arc processes. The system is robust and reliable thanks to patented Scansonic seam tracking.

Function description

The filler wire (or guide tip) precisely detects the weld edge and safely guides the joining process along the seam. Component tolerances are automatically compensated. At the same time, the wire itself is part of the joining process. The APN1 automatically compensates laterally and vertically for any deviations in the path of the joint from the programmed path of the robot.

Areas of application

  • Arc welding and brazing
  • MIG/MAG process, especially CMT® and Cold Arc®
  • WIG, Plasma of various manufactures
  • Plasmatron®
  • Various steel alloys, sintered metals, aluminium
  • Single-bevel tee butt weld
  • Fillet seam at lap joint
  • Fillet seam at T-joint


  • Improved seam quality due to optimised process parameters
  • Impervious to soiling, extraneous light, and the influence of heat
  • Not contigent on pre-production, machining, or master machine tolerances
  • Welding of small radii and complexx seam paths
  • Consistent welding arc length
  • Easy handling – Low programming requirements for robot/master machine


  • Control system either with digital inputs/outputs or field bus interface
  • Suitable for both cold and hot wire techniques
  • Alternative use of guide tip (MIG/MAG


  • Field bus interface
  • swivel axis for seam tracking in lateral direction
  • Telescopic arm for seam tracking in beam direction
  • Force sensor for regulating seam-tracking force
  • Linear axis for guiding the laser tip


  • Field bus: PROFINET, Ethernet/IP, Profibus, DeviceNet, Digital I/O (others on request)
  • Telescopic arm (TA-Fix)
Operating range, vertical± 5 mm
Search position± ca. 90°
Operating voltage24 V / 10 A
Weight without torchapprox. 12 kg
Dimensions (L x W x H) in mm217 x 164 x 570
ConfigurationAPN1 (without torch)
  • Wire feed drive DFE
  • Crash Sensor QS
  • Pressure wheel ADR
  • Wire cutter 45° DAS
  • Position monitoring sensor torch – tip of filler wire
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