Optics System Clears Up Uncertainty in Shaft Measurement
Quality Vision International’s TurnCheck system addresses sources of uncertainty in shaft measurement by focusing on advanced optics, thermal stability and ease of use.
The TurnCheck system from Quality Vision International (QVI) addresses sources of uncertainty in shaft measurement by focusing on advanced optics, thermal stability and ease of use. Its illumination system produces collimated light with a constant wavelength, eliminating the wrap-around effect on turned parts. The receiving optics are telecentric, with each element designed to eliminate distortion. The result is a uniformly magnified image with no edge effects or exclusion zones.
The system is designed to mitigate the effects of thermal variation found in shopfloor environments and to deliver accurate measurements in conditions where vibration is common. Users do not need to adjust lighting, focus, or image tools because the system optimizes these features automatically. Its controls and tools, designed for ease of use, facilitate fast setup without extensive operator training, according to the company. QVI offers the TurnCheck system in three different models to accommodate parts ranging to 1,200 mm in length.
Virtually every machine tool builder lists, as part of a machine's specification, accuracy and repeatability figures. What's generally not given is the method used to arrive at the figures. Though these methods are defined in linear positioning standards, not all builders use the same standards.
Functional gear testing, also known as total radial composite deviation, is a method of looking at the total effect of gear errors. This test method simulates the conditions under which a set of gears is likely to operate as a result of the gears meshing together.
Few manufacturing companies rely on ballbar testing to maintain machine tool accuracy as thoroughly as Silfex. Now, advanced training and a move to a Renishaw QC20-W wireless system have enabled the company to take the benefits of ballbar testing to a higher level.