Support

Check the connection from the voltage pickup to the Qualimaker board.

1. Put an isolation between the roll and the voltage pickup.
2. The lower voltage pickup should be isolated to the Z-bar.
3. Measure from the lower voltage pickup (1) to the upper contact (2) (Z-bar connection). This should be 0 Ohm! (see first picture beside)
4.  Measure from the lower voltage pickup to the Qualimaker clamp 125/126, one off them should be 0 Ohm! (see second picture beside)
5. Measure from the upper voltage pickup to the Qualimaker clamp 125/126, one off them should be 0 Ohm!
6. Measure the voltage on Qualimaker clamp 125 to 126 during welding
   • the voltage should be between 0.5 and 2.5 VAC

Possible cause:

• Check if the voltage pick – up “tongues” are worn.
• Check if there’s enough the “contact pressure” of those tongues or if they are bent. If they are bent; change them, do not attempt to bend them yourself, they might break!

• Short circuit (see picture/graph beside)
  e.g. lower tongue has contact with power window!
  • check wire – usually after a short circuit the wire is damaged!

• Short circuit (see picture/graph beside)
  • the wire might be damaged/broken within the Z-rail.

Possible cause:

• Check if the wire speed is stable and not too slow? Sometimes two cans might be welded together (no gap)!
• Check if the speed of the exit conveyor is fast enough? The gap between the cans must be minimum of 10mm.
• Clean the first light barrier and the reflector and check the adjustment!