PH20 Improves Inspection Performance Of CMMs

Renishaw has brought out the PH20 probe head, which offers 'head touches' for touch-trigger measurement and fast five-axis positioning to optimise feature access. Utilising technology developed for the Revo measurement system, the PH20 will improve inspection on a range of co-ordinate measuring machines (CMMs). Its compact design makes it suitable for new CMM purchases and as a retrofit to the majority of existing CMM touch-trigger installations. The new PH20 probe head also benefits CMM users with adaptive positioning to accommodate part misalignment, fast calibration routines and an integral TP20 probe mount that optimises the working volume of the CMM, bringing five-axis capability to smaller machines.

By incorporating the industry-standard TP20 touch-trigger probe, users of the PH20 probe head will immediately have access to a range of proven probe modules, providing a selection of trigger forces, directional sensing options and extensions to meet application requirements. The detachable modules provide crash protection and can be automatically changed using the MCR20 change rack. Companies with existing TP20 systems will be able to upgrade to PH20 and utilise their existing modules. 'PH20 minimises CMM motion, therefore reducing dynamic CMM errors, and its rapid "head touches" mean measurement points are taken much faster using only the rotary motion of the head.

'The result is improved accuracy, repeatability and significantly improved inspection throughput, with parts measured up to three times faster than current touch-trigger systems,' said Brian Gow, Renishaw's CMM marketing manager. For many CMM users, probe calibration can be a long process. The new PH20 head will offer time savings, with a rapid 'inferred calibration' technique that determines head orientation and probe position in a single operation, allowing subsequent measurement at any head angle. Available as a CMM retrofit, PH20 is available for purchase with new CMMs and is also available as a retrofit, including Renishaw's own CMM retrofit service, where it is packaged with Renishaw's Modus metrology software to give a completely integrated solution.

The PH20 system uses a Renishaw UCC controller, which provides connection to existing metrology and application software through the I++ protocol. For users of touch-trigger probing systems, PH20 therefore offers an opportunity to upgrade existing heads to the latest five-axis technology. The PH20's design means no air supply is required and it can be mounted to the CMM quill either directly or via a shank using a range of mounting adaptors. A PH20 system can also run existing indexing-head programs without modification.

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