Changing shape of the canbody (apple-like shape), after a certain production time

Possible cause:

• insufficient cooling
  • clean cooling circuit
  • change cooling additive / lubricant in the chiller
  • clean or change main- and micro-filter in cooling system (see pictures below)
      
• Check insulation
  • feel hot spots in the entire secondary circuit by hand or use IR camera if available.
• Check Z-guide for broken parts (nosepiece or main Z – bar or, depending on welder type, intermediate Z-bar)