Presentation on theme: "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."— Presentation transcript:
Tutorial: Engineering metrology Topic: Measuring arm FARO Prepared by: Ing. Pavel Rožek Projekt Anglicky v odborných předmětech, CZ.1.07/1.3.09/ je spolufinancován Evropským sociálním fondem a státním rozpočtem České republiky.
Measuring arm FARO
Measuring arms are sectional axis measuring machines whose basic component is a mechanical arm with several joints (links).
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.
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
Measuring machine with own balance and temperature compensation PC and software POLYWORKS V11 Mobile tripod
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
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.
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
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.
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
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.
Scan and CAD model comparing - 3D scene
Describe measuring arm and its measuring ways Question 2 Explain measuring arm usage in practice
NENÁHLO, Čeněk. Měření geometrických veličin. 1. Praha : ČMS, s. ČECH, Jaroslav; PERNIKÁŘ, Jiří; PODANÝ, Kamil. Strojírenská metrologie : skripta. druhé. VUT- FSI Brno : AKADEMICKÉ NAKLADATELSTVÍ CERM, s. Manuál POLYWORKS 11 FARO NEWS - magazín FARO Translation: JANATA, Petr. Handy slovník technický anglicko-český a česko-anglický. Plzeň: Nakladatelství Fraus, ISBN Lingea LEXIKON 5, Technický slovník anglicko-český a česko-anglický