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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 cause:

Possible cause:

U1 inverter feeder motor reach the adjusted current limit because sheet stack falls down/feeder crash. Remove sheet stack and check the mechanical adjustment of blank magazine and feeder.
U1 inverter current limit is set too low. Can be adjusted with parameter C022. Attention! Before you increase that limit check if the feeder can be turned by hand easily and mechanical condition is perfect.
For reset inverter switch off and on the machine.

Possible cause:

Wrong direction of rotation of the vacuum pump motor (only when machine has been disconnected from the power).
- change phases
Clogged filter of the vacuum pump (or in the vacuum hose / tube).
- replace it
Clogged bores in the sucker cups.
- clean it
Worn sucker cups.
- change sucker cups
Wrong vertical adjustment of the sucker bar.
- see manual of welder (chapter 5.3) and learn how to adjust sucker bar upper position
Badly cutted blanks with lots of burrs.
- grind / adjust cutters of slitter
Clogged vacuum valve.
- clean it (see here ) or replace valve (CM article No. 005925)
LED not “ON” when production “ON”.
- refer to the electrical manual
Too tight adjustment of the blank magazine.
- see manual of welder (chapter 5.3.) and learn how to set blank magazine correctly
Worn sucker rod or worn seals/bearing in the vacuum housing.
- replace it

NOTE: Only applicable for the model X8-350!