Probing Systems For Co-ordinate Measuring machines - Teknikel

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Probing systems forco-ordinate measuring machinesSP80 - ultra-high accuracyscanning probeThe SP80 is a passive scanning probe usingdigital scale and readheads which enable asystem resolution of 0.02 µm (0.00000079 in).This gives exceptional scanning performance,even with long styli.Scanning probes4-7The SP80 can carry styli up to 800 mm(31.50 in) long and 500 g (17.64 oz) mass,including star confi gurations. Unbalancedstar confi gurations do not requirecounterbalancing. Kinematic stylus holderchanging allows for the repeatable re-locationof the stylus, optimises stylus arrangementsfor each feature, and overcomes the need forre-qualifi cation.The SP80 has a kinematic mount thatprovides a repeatable connection to themating plate mounted on the quill (KM80),allowing the probe to be easily removed.Kinematic stylus holders provide crashprotection in the XY plane, and a bump-stopprevents damage to the probe in the Z axis.NOTE: Please see the accessories page 13-4for details of adaptor plates PHA80 and PHA3which permit rapid interchange between SP80and PH10MQ indexing motorised head.Isolated optical metrology systemUsing an isolated optical metrology system,SP80 directly measures the defl ectionof the whole mechanism, thus providingoutstandingly accurate position sensing.The isolated optical metrology system candetect sources of variable error such asthermal and dynamic effects. In contrast,probes with displacement sensors mountedto stacked axes suffer from latency underchanging inertial loads, and cannot detectthermal growth in their mechanisms.Electrical connectionfor readheadsThe readheads for each axis are fi xed to thebody of the probe, and measure the defl ectionin each direction. Any inter-axis errors causedby the arc motion of each pair of parallelactingsprings are directly measured by thesensor system. Isolated optical metrologysystems have no moving wire connections.Readheadsattached toprobe body‘Moving cube’with scalesLight is refl ected fromthe moving cube ontoreadheadStylus mountShaded areasindicate themoving partsIsolated optical metrology
SP80 probe bodySP80 probe kitThe sensor mechanism comprises an arrangement of threesets of parallel springs, one for each body axis, set in a cube- hence the body shape. The motion of the stylus is coupledto a ‘moving cube’ holding graduated refl ective scales - againone for each axis. The readheads are mounted on the wall ofthe probe and the light projected from them is refl ected fromthe moving scales. This method of motion detection does notrequire any form of moving wire connection.Interface optionsInterfacing the SP80 to a CMM can be achieved by:• Using an SP80 daughtercard for direct UCC1 or UCC2integration• Using a Renishaw PCI counter card (CC6) and theRenishaw interpolator unit IU80KM80 kinematicquill mountSP80 probebodyTypical CMM quillScanning probes4-8• Using interface cards designed by the machine builder andused in conjunction with an IU80• Using a counter card and interpolator unit designed by themachine builderThe IU80 conditions the probe signal to provide a digitalindustry standard EIA RS422 quadrature scale output, whichcan be accepted by CMM controllers.Please contact Renishaw for full information on the methodsdetailed above.SH80 stylusholderAdjustablestylus mountKM80 quill mountThis is fi xed to the quill and provides rapid and repeatablekinematic mounting of the SP80 body to the CMM.SH80 stylus holderThe detachable stylus holder is located on the probe bodyusing a repeatable kinematic joint and magnets. It providesautomatic stylus changing capability and has an M5 stylusmount attachment. For additional fl exibility, this may be rotatedby adjusting a grub screw, and does not need to be removedfrom the probe body to make the adjustment.Two SCP80’s mounted on an MRSMRSSCP80 stylus changing portThe SH80 stylus holder can be removed automatically andreplaced on the probe body using an SCP80 mounted on amodular rack system (MRS). The SCP80 has a spring loadedmechanism which has been designed to ease the stylusholders away from the probe body. Using the SCP80, the SP80pull-off force is reduced to less than 20 N.PHA3 and PHA80The PHA3 and PHA80 adaptor plates enable rapidinterchange between PH10MQ (using PHA3) and SP80 (usingPHA80) on the same CMM.SCP80
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Page 5 and 6: Step 3 (see sections 5/6/7/8)Probe
Page 7 and 8: TP2-5W probesM8 × 1.25 threadThe T
Page 9 and 10: TP200 / TP200B modular probesThe TP
Page 11 and 12: TP200 / TP200B features and benefit
Page 13 and 14: TP20 stylus moduleThe TP20 stylus m
Page 15 and 16: Specification summary (2)Module App
Page 17 and 18: SP25M modular componentsystemSP25M
Page 19 and 20: Automation using the FCR25 flexible
Page 21: Specification summary SP25MPROBE AT
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