As a key part of engine, the crankshaft's roundness has a direct impact for engine performance, such as precision, friction, vibration, noice and so on. To achieve low production cost, high efficiency and precision of the crankshaft manufacture, the noncircular grinding process technology emerged as the times require, which avoids the fixture errors in the conventional grinding process for crankshaft. In the noncircular grinding process, there are various influences affect the process precision and...