Sheet stacker module

A stacker module comprising:

• a lift table;
• a stacker configured to place sheets that are successively supplied thereto on top of a stack forming on the lift table;
• a controller configured to lower the lift table as the stack grows;
• a height-adjustable eject table;
• and
• an ejector configured to transfer a completed stack from the lift table onto the eject table,
• wherein the ejector is height-adjustable for transferring stacks onto the eject table in different height positions of the lift table, the stacker module further comprising a controller configured to have the stacker module perform the steps of:
• stacking the successive sheets on top of the stack forming on the lift table;
• lowering the lift table as the stack grows;
• activating the ejector for transferring the completed stack from the lift table onto the eject table;
• calculating a target height of the stack to be formed on the lift table based on a number of sheets in a print job;
• determining a height position for the eject table based on the target height of the stack, at which height position the lift table will arrive when the stack has reached the target height
• moving the ejector and the eject table to the height position;
• and
• activating the ejector as soon as the lift table has arrived in said height position.