Snmek 1

Anglicky v odbornch pedmtech"Support of teaching technical subjects in EnglishTutorial: Engineering metrology

Topic: Measuring arm FARO

Prepared by: Ing. Pavel Roek

Projekt Anglicky v odbornch pedmtech, CZ.1.07/1.3.09/04.0002je spolufinancovn Evropskm socilnm fondem a sttnm rozpotem esk republiky.

Measuring arm FARO

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

Mobile measuring arm

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.Mobile measuring arms

FARO Arm Fusion is the lowest type in line. Its advantage is measuring accuracy, ergonomics and reliability in workshop setting conditions.Faro Arm Fusion

Type(measuring extent) number of axisAccuracy repeatibility of one point measuring in spaceLengtht accuracyWeight

Basic components of measuring machine

Measuring machine with own balance and temperature compensationPC and software POLYWORKS V11Mobile tripod

Accessories

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 componentVacuum fixture: used to place measuring arm to non-metallic or non-magnetic surface of measured component

Accessories

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

Usage in practice

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.

Contact probe calibration

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

Scanner calibration

3D scanningUsed 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 measuringUsed to measured component inspection by contact method.Result is measuring report or graphic comparison of measured component with model.Measuring possibilities

Scan and CAD model comparing - 3D sceneMeasuring report

Describe measuring arm and its measuring waysQuestion 1

Question 2Explain measuring arm usage in practice

NENHLO, enk. Men geometrickch veliin. 1. Praha : MS, 2005. 207 s.

ECH, Jaroslav; PERNIK, Ji; PODAN, Kamil. Strojrensk metrologie : skripta. druh. VUT- FSI Brno: AKADEMICK NAKLADATELSTV CERM, 2005. 176 s.

Manul POLYWORKS 11

FARO NEWS - magazn FAROTranslation:www.seznam.czwww.slovnik.czJANATA, Petr. Handy slovnk technick anglicko-esk a esko-anglick. Plze: Nakladatelstv Fraus, 2000. ISBN 80-7238-075-3Lingea LEXIKON 5, Technick slovnk anglicko-esk a esko-anglick. 2010.

Literature