Pallet Changer

The pallet clamping check is checked by volume flow. An encoder module in the hydraulic line (Kracht) transfers digital pulses to an evaluation unit (Kubler). This unit is able to count digital signals and forward them to the PLC via 2 outputs. In the PLC program, the Kubler counter outputs are compared for the respective function and responded to depending on the situation. The volume flow counter is located in the unclamping line and requires only one defined switching threshold, independent of the clamp and unclamp functions. Output 1 of the counter indicates an clamped/unclamped pallet in the work area. Output 2 of the counter indicates overlift of the swivel clamp or clamping without pallet. This is to ensure that it is recognised if the pallet is wrongly set down on the swivel clamp.