CIRCOSCAN leaflet
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CIRCOGRAPH® Sensor systems Ro 20/Ro 35/Ro 65/Ro 130 6.452/6.453/6.460/6.461 Fig 1 Rotating sensor system Ro 35P

tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:11.00pt "Arial", sans-serif; } .font1 { font:12.00pt "Arial", sans-serif; } .font2 { font:14.00pt "Arial", sans-serif; } Application The sensor Systems Ro 20/ Ro 35/ Ro 65/ Ro 130 operate on the basis of the eddy current principle in accordance with ISO 15548. They permit a highly sensitivet noivcontacting testing wrth electronic clearance compensation of ferro-magnetjc. austenitic and non-ferromagnetic round matehal (wire, bar. tube) for mainly longiludinally oriented flaws in combinatkxi with testing and evaluabon...

tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:12.00pt "Arial", sans-serif; } .font1 { font:13.00pt "Arial", sans-serif; } .font2 { font:14.00pt "Arial", sans-serif; } .font3 { font:25.50pt "Arial", sans-serif; } Mode of opration Rotating Systems are used to detect longitudinal surface delects. Probes rotate at high speed and wrthout physical contact around the test pice. By feeding the material the probes scan the surface in heltcal paths. Due to the locally high r騩solution of the probes and the transverse movement across the crack by each rvolution, this is the most...

6.452/6.453/6.460/6.461 4 Mechanical construction In general a complete CIRCOGRAPH test system consists of • Testing and evaluation electronics • Motor control • Sensor system • Cables and accessories Testing and evaluation electronics Fig 6 CIRCOGRAPH DS Motor control An external motor control is required for powering the drive. The motor control does not only supply the required voltages and currents but also contains the required switching and safety facilities (motor protection switches, EMERGENCY-STOP, protection against self-starting after power failure and a fast braking device). The...

5 6.452/6.453/6.460/6.461 The sensor system consists of the following main components Test head Test heads consist of an eddy current probe with field, measuring and clearance windings which are installed in a precise mechanical holder. Two types exist: In pin design at Ro 20 and Ro 35P the test heads are full cast. Fig 8 Test heads in pin design In lever design at Ro 35L, Ro 65 and Ro 130 the test heads are mass-compensated and can be swiveled about a fixed bearing pivot pin. The tension spring can be transposed, so that a LIFTOFF- function controlled by rotational speed will be available....

6.452/6.453/6.460/6.461 6 Fig 12 Rotating disc at Ro 130 Roller guide Roller guides are recommended if the drivers for conveying the material cannot be installed directly in front and behind the sensor system. The roller guides have two advantages: In set-up mode, a calibration sample with reference flaws can be used outside the testing line, which will be positioned right in the center by the roller guides. In test mode, the roller guides improve centricity, in particular with smaller sizes, and damp vibrations. The roller guides are mounted at the rotating head on entry and exit side. The...

7 6.452/6.453/6.460/6.461 Protective nozzles The protective nozzles protect the test heads from damage, particularly during entry and exit of test material. The nozzles are available in the nominal diameter from 2 to 135 mm. They limit the maximum eccentricity of the test material so that the clearance compensation works properly. Fig 15 Protective nozzle and nozzle holder standard Fig 16 Principle of protective nozzles and nozzle holder standard The protective nozzles robust for Ro 35L and Ro 65 are recommended at usage in drawing machines. Fig 17 Principle of protective nozzles and nozzle...

6.452/6.453/6.460/6.461 8 Nominal diameter of Test material at Ro 20 Grading of protective nozzles d [mm] d1 [mm] 2 – 4 d + 0.1 4 – 10 d + 0.2 10 – 14 d + 0.3 14 – 20 d + 0.4 Nominal diameter of Test material at Ro 35P Grading of protective nozzles 2 – 8 d + 0.1 8 – 15 d + 0.5 15 - 35 d + 1.0 Nominal diameter of Test material at Ro 35L Grading of protective nozzles 5 – 8 d + 0.1 8 – 15 d + 0.5 15 - 35 d + 1.0 Nominal diameter of Test material at Ro 65 Grading of protective nozzles 5 – 6 d + 0.2 6 – 7 d + 0.3 7 – 8 d + 0.4 8 – 14 d + 0.5 14 – 30 d + 1.0 30 – 65 d + 1.5 Nominal diameter of...

tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:9.00pt "Arial", sans-serif; } .font1 { font:12.00pt "Arial", sans-serif; } .font2 { font:14.00pt "Arial", sans-serif; } Technlcal data Sensor System Ro 20 Sensor System Ro 35 P/L Sensor System Ro 65 Sensor System Ro 130 Test material diameter range 2 - 20 mm 0 2 - 35 mm 0 (P) 5-35 mm 0 (L) 5-65mm0 10- 130 mm 0 Rotating speed 9000 or up to 18000 rpm 4500 or 9000 rpm 3000 or 6000 rpm 1500 or 3000 rpm Max. Dcl驩ration time (dpendent on rotating speed) approx. 30 seconds with brak魭ing, approx. 360 seconds without braking approx. 40...

6.452/6.453/6.460/6.461 10 Flaw detection limit The limit is dependent on the noise level. This level is influenced by the surface on the test material, by the surface roughness, magnetic inhomogenity, as well as guiding and transportation. Flaw detection for improper surface condition is not reliably reproducible, or is limited to a great extend. Flaw type: Longitudinal surface flaws Flaw detection: Dependent upon surface roughness, test flaws may be detected • starting from 30 ìm at Ro 20 / Ro 35 • starting from 80 ìm at Ro 65 / Ro 130 Speed table Transportation speed vS = Scanning track...

tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:12.00pt "Arial", sans-serif; } .font1 { font:14.00pt "Arial", sans-serif; } .font2 { font:15.00pt "Arial", sans-serif; } .font3 { font:20.00pt "Arial", sans-serif; } .font4 { font:13.00pt "Georgia", serif; } Two test head types are availaWe N for testing bright matenal DF for testing rough rolled steel Speed table for sensor System Ro 20 Maximum testing speed [mfs] Decreasing sensitivity to short flaws Tiack nidth BS [mm| Test head type 0.45 ^-^"^ N 646001-?015 ^^^^ 0.9 2PK/1.S i)l 6.460 03-2015 0.75 N 6.460.01-2025 1.5...