The electron beam is an excellent welding tool.During years this powerful beam guarantees high performance welds in automotive,aviation and other industries.Due to its excellent parallel seam quality this welding tool is often used for well-prepared gapless joints.Powerful fixtures have to guarantee the well-defined positioning of the work piece.However,tolerances in the work piece or the loading mechanism can cause misalignments.High quality welds frequently do not allow those misalignments.Consequently operators have to take care that the beam is proper positioned before welding.With joint tracking systems it is possible to automate those manual manipulations.The production gets more independent on adjustments by the operator.CCD cameras or electrodes for backscattered electrons for joint tracking systems need directly access to the joint.In many applications the fixture is in between the work piece and the measuring device.The joint cannot be automatically detected.Furthermore the positioning of the electrodes for backscattered electrons gives a major impact to the quality of the measurement.It becomes mandatory to integrate the joint detection into the fixture.The usage of backscattered electrons for seam tracking requests the integration of electrodes into the fixture.The fast beam deflection for electron beams opens a wide range of opportunities.Electron optical viewing improves the visualization of the work piece.Multi pool applications or surface modifications can increase the production capacity or achieve better product performance.Joint tracking can be performed offline or online.The free programmable environment allows combining tasks to match the production demands.Examples will be used to illustrate individual applications. The electron beam is an excellent welding tool. Drawing years this powerful beam guarantees high performance welds in automotive, aviation and other industries. Due to its excellent parallel seam quality this welding tool is often used for well-prepared gapless joints. Powerful fixtures have to guarantee the well-defined positioning of the work piece. Since, tolerances in the work piece or the loading mechanism can cause misalignments. High quality welds do not allow those misalignments. .With joint tracking systems it is possible to automate those manual manipulations. The production gets more independent on adjustments by the operator. CCD cameras or electrodes for backscattered electrons for joint tracking systems need directly access to the joint. Many many the fixture is in between the work piece and the measuring device. The joint can not be automatically detected. Futuremore the p ositioning of the electrodes for backscattered electrons gives a major impact to the quality of the measurement. If mandatory to integrate the joint detection into the fixture. usage of backscattered electrons for seam tracking requests the integration of electrodes into the fixture. fast beam deflection for electron beams opens a wide range of opportunities. Electron optical viewing improves the visualization of the work piece. Multi pool applications or surface modifications can increase the production capacity or achieve better product performance. Joint tracking can be performed offline or online. free programmable environment allows combining tasks to match the production demands. Examples will be used to illustrate individual applications.