Willrich Precision Instrument Company, Inc

Renishaw QC20-W Wireless Ballbar for Machine Tool Performance Diagnosis Video

The Renishaw QC20-W wireless ballbar for machine tool performance diagnosis
• Helps ensure accurate parts, first time, from CNC machines
• Reduces down-time & cost (Reduces machine down-time, scrap and inspection costs)
• QA compliance (Show compliance with both machine performance and quality management standards)
• Predictive maintenance (Allows fact based predictive maintenance)
The Renishaw ballbar
Renishaw's QC20-W ballbar offers you the perfect solution. It's the quickest, easiest and most effective way to monitor machine tool condition. The heart of the system is the ballbar itself, a very high accuracy, telescoping linear sensor with precision balls at each end. In use the balls are kinematically located between precision magnetic cups, one attached to the machine table and the other to the machine spindle or spindle housing. This arrangement enables the ballbar to measure minute variations in radius as the machine follows a programmed circular path. The data collected is used to calculate overall measures of positioning accuracy (circularity, circular deviation) in accordance with international standards such as ISO 230-4 and ASME B5.54, or Renishaw's own analysis reports. Data is displayed graphically as well as in numeric format to aid and support diagnosis. Supplied as a complete kit-in-a-case, the ballbar kit provides a powerful and portable solution -- just add a PC and you're ready to start testing.
Renishaw ballbar testing Typically, a quick 10 minute test is all that is required. Ballbar 20 software guides you through the circular test described above, with clear information and guidance throughout the simple four step process
1. Set-up
Quick and easy, the QC20-W ballbar is mounted between two repeatable magnetic
joints.
2. Capture
The machine performs two consecutive circular arcs (clockwise and counterclockwise) in any one of the machines test planes (XY, YZ, ZX) and very accurately measures any variations in the test circle radius traced by the machine during the test.
3. Analyze
Renishaw's Ballbar 20 software then analyses the measured data to give results in accordance with various international standards (eg. ISO 230-4, ASME B5.54).
4. Diagnose
Renishaw's own and uniquely comprehensive diagnostic report also gives you an overall assessment of machine performance(circularity) but in addition provides an automatic diagnosis of up to 15 specific machine positioning errors. Each error is ranked according to its significance to overall machine performance alongside the error value. Even nonexperts can get expert results. It is such a powerful diagnosis that many of the world's leading machine tool builders and manufacturing companies choose it as their standard test report format.
As simple as A-B-C
Fixing your machine
The Renishaw diagnosis report (a) not only ranks individual machine errors but using the 'hot links' to the system manual you can see typical machining faults (b) related to these, and even some possible fixes.
Even with this diagnosis you can be faced with many alternative strategies to get your machine within the required specification. Your choice will depend on the machine configuration and what resources you have available. However, using an integrated simulator package you can use the results file to see what combination of error fixes will produce what overall improvement in machine performance.
This allows you to make an informed decision on the best course of action, whether that is inhouse correction, contracted-in machine maintenance, or even moving production to an alternative machine.
Advanced diagnosis
The QC20-W and Ballbar 20 software allows you, for the first time, to carry out testing in three orthogonal planes with only a single set-up. This gives much quicker testing and allows for a true 'volumetric' analysis of your machine.
Checking trends
Regular, repeatable testing is the key to effectively tracking changes in machine error sources over time. Ballbar 20 uses customer defined test templates to ensure repeatable testing. A comprehensive machine history function (c) then gives you a quick and simple way to examine the data. You can see if problems are developing and so schedule preventative maintenance (PM) if necessary in a targeted and timely way. Fixing problems before they become critical minimizes downtime and maintenance cost.
Please visit Renishaw's website for more information on the Ballbar:
www.renishaw.com/ballbar

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