Hoerbiger-Origa is introducing a range of intermediate stop modules to complement its heavy-duty, precision-guided rodless pneumatic cylinders. These ZSM modules enable precise intermediate positioning of the guide carriage at any desired point along the stroke of the cylinder, using simple pneumatic technology.
The module is a mechanical device that extends and retracts a physical stop, which provides for a high level of accuracy and repeatability. Its simple pneumatic operation can be readily sequenced using either a PLC (programmable logic controller) or pneumatic logic.
With a ZSM module, movement to the next position is possible without the need to initially reverse-stroke the piston. (When using most other retractable mechanical stops with pneumatic actuation, it is necessary to momentarily reverse-stroke the actuator from the mechanical stop prior to retracting the stop).
Shock absorbers integrated into the guide carriage guarantee a smooth linear deceleration to eliminate shock loading and optimise cycle times.
As a standalone module, the ZSM can be factory-fitted to new cylinders or retrofitted in the field to upgrade a cylinder's performance. Multiple modules can be fitted to a single cylinder, the only restriction being physical size, so that various stop positions can be realised. This would be useful in many applications such as cut-to-length machines and multi-station assembly machines.
By itself, the ZSM provides open-loop accurate positioning. It can also be used in conjunction with an Origa Sensoflex Incremental displacement measuring system providing a feedback signal of actual position, for applications where absolute surety of position is required.
Compared to servo/stepper drive alternatives, the ZSM is said to provide a cost-effective means of achieving accurate mid-stroke positioning. The twin-rail guide system with multiple-race recirculating ball carriages ensures a high degree of rigidity and precision, enabling the system to compete with significantly more expensive precision slide tables.
A fully integrated design offering actuation, guidance structural support and position sensing built into a single unit, the ZSM minimises engineering costs and provides a simple, compact, reliable, maintenance-free device for the many industrial applications requiring intermediate positioning along a linear axis.