Runout is a measure for the imperfections of a rotating shaft to be ideally round (radial runout) or flat (axial runout). Runout will be checked during manufacturing or repair of a rotating shaft. For that purpose Hofmann offers portable equipment or stationary machines.
Type RO 7000
Hofmann’s Portable Runout Inspection System RO 7000 provides a solution to measure radial and axial runout of rotors and other cylindrical parts in multiple axial planes. During a measurement a rotor will be supported for example in a lathe, in V-blocks or on rollers. Rotors may be rotated by a motorized drive or manually. The system consists of a measuring controller to be hooked-up to a PC, a sensor set and the measuring software Orbistar 2.
Orbistar 2 helps to setup a specific measuring task, acquires and displays the measuring data, provides tools for data analysis and generates reports. This software can also compensate for systematic measuring errors of typical rotor bearings like V-blocks and for the shaft movement using a reference sensor.
Runout will be measured using proximity sensors which provide adaptors with interfaces to standard magnetic bases. The angular position will be captured with an encoder wheel which is driven by the rotor surface or by a speed sensor.
A special feature of RO 7000 is its capability to measure electrical runout simultaneously with a tactile (mechanical runout) and an eddy current senor (total runout). The electrical runout is the difference between the total and the mechanical runout, i.e. the systematic measurement error of the eddy current sensor. This measuring value is useful when inspecting traces used for shaft vibration measurements.