In it’s uppermost position, the sucker should lie slightly above the sheet inlet, between the first pair of rollers.
If the setting has to be changed, the screw on the setting ring will have to be loosened.
NOTE:
Further information regarding the exchange of sucker unit of the feeder can be found in Chapter 6. Changeover.
To perform a good timing, the best way is to disconnect the air hose of the cylinder and block it. In that way you can manually lift the sucker unit and find the correct timing.
If you move down the sucker unit to the blank, the vacuum will be activated. Then move up the unit together with the blank until the vacuum breaks.
The correct timing of “breaking” the vacuum is, when the blank just arrives between the roller pair.
