The Apollo Compensating Stacker processes saddle-stitched products reliably into cross-stacked piles. It is employed in the low- to mid-range performance sector and can achieve a production speed of up 16,000 cycles per hour. The Apollo can be operated by just one person. Size changes are carried out quickly and without tools, shortening the set-up times. The Compensating Stacker processes one-up and two-up products.