Measuring Machine
Saturday, July 2nd, 2011 |
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Advances in Coordinate Measuring Machine Probe Calibration
When needing to take the exact measurements of an object one of the best and most efficient ways of doing so Is by using a Coordinate Measuring Machine. In order to assure proper function, however, the coordinate measuring machine should be calibrated so as to generate accurate measurements. Unfortunately, the calibration process can take be long and tedious with the need to continuously check the machine for proper operation. In fact, it's not uncommon for hours to be allocated before machine operation in order to properly calibrate the device.
The reason for such a strenuous calibration process is due to a few factors – all of which run a great risk of influencing the measuring capability of the machine thus resulting in a greater chance of operational errors. One of the largest factors that can influence the CMM's measuring capability is outside "noise". Any sort of outside motion must be dampened before it reaches the sensory probe that does the vast majority of the measuring. Aside from that, the probe itself along with the data cables must be protected from both physical damage and electromagnetic interference that may occur if there are devices in near proximity that generate powerful electromagnetic waves.
Since the calibration process mainly involves the probe there have been advances in rapid coordinate measuring machine probe calibration. This reduces the probe calibration time significantly and thus increasing the CMM's operational time. Other calibration advances such as "rapid inferred head calibration" achieve a significant reduction of risk of error along with a reduction in calibration time.
An example of such probes is Renishaw probes. These Renishaw probes are equipped with that very same rapid inferred calibration feature which enables them to accurately determine the head orientation and the probe position in one single operation. This allows the machine operator to perform accurate measurements at any head angle.
Renishaw probes also have the option to be hooked up with a camera that allows the CMM operator to confirm the proper measurement area. This makes them valuable tools in any environment that utilizes a CMM. The time saved for calibration along with enhanced ease of use and probe protection make it easier for the CMM to measure objects correctly.
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