2. Tutorial: Engineering metrology Topic: Measuring arm FARO Prepared by: Ing. Pavel Rožek Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/04.0002 je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.

3. Measuring arm FARO

4.  Measuring arms are sectional axis measuring machines whose basic component is a mechanical arm with several joints (links).

5.  Monitored elements (e.g. sizes) are scanned by contact sensors.  Thanks to ball & joint principle, it is possible to measure by sensor at hard to access places of measured object (e.g. In cavities).  Measuring extent of these systems is from 1,2 m to 3,8 m.  Due to its small weight and high mobility, measuring arm can move easily towards measured object or it can be placed exactly on the machine tool.

6.  FARO Arm Fusion is the lowest type in line. Its advantage is measuring accuracy, ergonomics and reliability in workshop setting conditions. Type(measuring extent) – number of axis Accuracy – repeatibility of one point measuring in space Lengtht accuracyWeight

7. Measuring machine with own balance and temperature compensation PC and software POLYWORKS V11 Mobile tripod

8. Fixed fixture: used to place measuring arm directly to table or to mobile truck. Clamp is bolt to table tightly. Magnetic fixture: used to place measuring arm to magnetic surface e.g. exactly on monitored component Vacuum fixture: used to place measuring arm to non- metallic or non-magnetic surface of measured component

9. Shifting cone: used to measuring large sized components, larger than measuring arm extent. Contact probe: Selected in accordance to shape and measured component complexity. They are divided up to probe diameter (ball), up to length or shank shape.

10.  Aircraft production: components´ measuring, balancing tools and forms setting  Car industry: components´ measuring, balancing tools and forms setting  Metalworking: inspection of the 1st component, measuring in piece and series production  Forms´ and tools´ inspection, scanning and making prototypes, machining control

11.  It is necessary to make contact probe and scanner calibration before measuring or in case of contact probe change.  It is necessary to use calibration table, set measuring machine accuracy is checked by this way.

12.  At first, we calibrate calibration plate surface and then we calibrate scanner.  When the calibration is successful, we can start measuring inspection or components´ scanning

13. 3D scanning  Used to component checking by comparing with CAD model and engineering reverse.  The result is graphic report, chart or graphic detail with selected values presentation. Inspection measuring  Used to measured component inspection by contact method.  Result is measuring report or graphic comparison of measured component with model.

14.  Scan and CAD model comparing - 3D scene

15. Describe measuring arm and its measuring ways Question 2 Explain measuring arm usage in practice

16.  NENÁHLO, Čeněk. Měření geometrických veličin. 1. Praha : ČMS, 2005. 207 s.  ČECH, Jaroslav; PERNIKÁŘ, Jiří; PODANÝ, Kamil. Strojírenská metrologie : skripta. druhé. VUT- FSI Brno : AKADEMICKÉ NAKLADATELSTVÍ CERM, 2005. 176 s.  Manuál POLYWORKS 11  FARO NEWS - magazín FARO Translation:  www.seznam.cz www.seznam.cz  www.slovnik.cz www.slovnik.cz  JANATA, Petr. Handy slovník technický anglicko-český a česko-anglický. Plzeň: Nakladatelství Fraus, 2000. ISBN 80-7238-075-3  Lingea LEXIKON 5, Technický slovník anglicko-český a česko-anglický. 2010.