The following tips contain important information on how to achieve good weld joints.

1. The welding elements and workpieces must be weldable. Only use material combinations specified in these operating instructions (otherwise suitable tests must be carried out beforehand to confirm the necessary quality features).

2. Make sure that the maximum roughness of the welding zone does not exceed 80 µm.

3. The welding zone should be metallically bright: Workpieces of aluminium or with aluminium coating may only be cleaned with a rust-free wire brush. Carefully remove all soiling like rust, scale, paint, moisture, grease and oil. Strip anodised workpiece surfaces with a caustic soda lye or grind them clean.

4. The welding site must be designed so that there is always a surface of at least Ø 40 mm available to receive the positioning feet. When using centring tubes or similar, at least Ø 20 mm.

5. Make sure the workpiece is supported such that it is free of vibrations. This is especially important in the case of large and thin walled workpieces.

6. Always lay the welding and earth cables free of loops. In this way electromagnetic influences can largely be avoided.

7. Fasten the earth clips symmetrically to the welding site and not too close to it. In this way flaws in the weld quality caused by arc blowing can be avoided.

8. Make sure there is a good transfer of current (low resistance) at all contact points in the welding circuit (welding cable connections, chuck, earth cable connection, earth clips).

9. Observe the necessary settings on the welding gun and power unit for your welding job. 4. Operation Stud welding system NOMARK 66/88

10. The welding gun and workpiece may not be moved during the welding process.

11. Always pull the gun off the welding element vertically. This prevents overstretching of the chuck blades.

12. Avoid welding on one workpiece with more than one welding system at the same time (possible influence on the arcs).

13. In order to check that the settings are correct, a number of trial welds should always be performed before commencing work. The quality of the welding results must be checked.

14. Check the clamping force of the chuck blades from time to time and bend them together a little if necessary. This increases the lifetime of the chuck.