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Possible Causes & Resolutions:

• Check the blank cutting tolerances and quality (download form for cutting tolerances): If the cutting measures are out tolerance, blanks will create downstacking and double sheet errors.
• Check the burrs on the blanks (Cutting burrs B max. 0.15 x sheet thickness s): If the burrs are too big, the blanks will create downstacking and double sheet errors.

• Check the general setting of the blank magazine acc. instruction manual. The separator notches should always be aligned with the suction cups.
• Check the separating air: If the separating air pressure is too high or tool low, the bottom blanks will not being separared correctly. Try with more or less separating air.
• Check the position of the separation air nozzles: The air shall always being directed towards the most fanned-out part of the sheet stack. The distance between the separation air nozzles and the sheet stack should be a maximum of 1mm.
• The top position of the suction cup should always be adjusted with the separation air turned on to prevent it from being set too high. Otherwise the separating air between the sheets is pressed out which will lead to double sheets.

Problem:

All drives are starting correctly, but the vacuum and welding current are not active.

Possible Causes & Resolutions:

• Welding pressure has been set below the min. value of 2.0 bar => Check the welding pressure setting value on the precise air-regulator and reset if needed.
• Solenoid valve welding pressure Y10 does not work correctly  => Check the welding pressure valve Y10. Does the valve switch correctly and do the welding rollers close?
• Welding rollers are closing and welding pressure is set correct, but no welding pressure value is displayed on the HMI => Check whether the analogue sensor B77 is working correctly or not.

Possible reason:

• Check the blank cutting tolerances (can be supplied by Can Man): If the cutting tolerances are to big, the blanks will create all kind of downstacking errors.
• Check the burrs on the blank: If the burrs are to big, the blanks will create all kind of downstacking errors.
• Check the setting of the separating air: If the separating air is to low, the blanks can not being pulled down correctly. Try with more or less separating air.
• Clean the slider of the Linmot pusher according the manual.
• Magnets in the base plate might brake the blanks to much: Can Man does equip each base plate with 4 or max 6 magnets, depending on the the blank size. Remove eventually 2 magnets.
• Check the clearance of the first rollformer roller pair: The clearance between the lower and upper roller might be too small. Adjust the value according manual.
• Check the “Quick Change Level 40mm” setting acc. below pictures on the HMI: If the distance between the blank stack and the base plate measures 30 mm, set the function “Quick Change Level 40mm”  to OFF. If you measure 40mm, set it to ON.

• Check the vacuum-stop point: The process to stop the vacuum must be activated by the mechanism around 3 mm before the blank arrives at the base plate. Please check the manual how to set.
• Check if the supporting air-pressure to stop the vacuum is adjusted correctly: Check the value / setting according the manual.