Cylinder 1, attached to the travelling ram of the shaper is connected to cylinder 2 at the front end of the ram. Piston 3 of cylinder 2 is linked to the tool head of the shaper. The left end of cylinder 1 is connected to the lower end of cylinder 2, and the right end of cylinder 1, to the upper end of cylinder 2. When fluid is delivered by pump 9 to the left end of cylinder 1, piston 3 of cylinder 2 moves rapidly upward and advances the tool head to the workpiece being machined. When fluid is delivered to the right end of cylinder 1, it flows to the upper end of cylinder 2 and rapidly retracts the tool head from the workpiece (on the return stroke of the ram). Until trip dog 4 reaches pin 5 of valve 6, the ram has rapid traverse motion. At this point, valve 6 switches in speed regulator 7 and further travel of cylinder 1 and the ram is at a lower working speed. At the end of the working stroke, trip dog 8 presses pin a of reversing device 10 and switches on the rapid return stroke.
$4158$CHP,Dr$