The Roundness Error Detection Method Of NC Machine Tool Based On EIB741

Machining accuracy is an important technical indicators, the factory must be accurately detected in the assembly shop. Machine precision test is divided into static testing and dynamic testing of two categories. Especially for high-speed machine, the results of dynamic tests to better illustrate the level of accuracy of the machine movement. Through the dynamic test results were analyzed, the machine can understand the current state of motion. Through the static test, the machine can reflect the geometric precision."Circle check" by the state in the non-processing machine instructions for the two linear axes circular interpolation motion. From the measured circular trajectory (motion profiles) can be obtained judgment motion accuracy and error sources.Dalian Machine Tool Group introduced HEIDENHAIN KGM and VM grating detection machining accuracy, high detection accuracy, Detection method is to get the position encoder signals are connected to the PC with IK220capture card. Equipped ACCOM software for signal processing on a PC. But there are disadvantages:First, capture cards will be collected through the PCI bus data transfer to the PC, so it must be connected to a desktop computer with a PCI slot, the measurement needs to be moved to the workshop host and display the measurement is very inconvenient. Second, because ACCOM software comes with a dongle, so limited right to use the software. Third, the software interface in English, precision machine tool factory workers trained to detect a certain degree of difficulty.Major improvements to the hardware and software for the problem of three of the papers. By comparing the technical parameters, choose the encoder can accept KGM collected sinusoidal incremental signals EIB741connection box. Such hardware system can be EIB741junction box instead of IK220grabber. EIB741connection box and can be connected to the notebook via a network cable, the measuring instrument can be connected to the notebook. As the driver software and sample programs and EIB741 the Labview application software supplied with the product, user-friendly computerized measurement. Driver software enables customers to easily create their own applications. So with Labview software to develop new program, select EIB741polling module programming.Origin by obtaining module design, design finishing, the scale error data module design, so as to realize the function processing of the data.Machine precision measurement tests showed that:Labview software and connection box EIB741acquisition and processing machine precision error of size. Achieve Chinese interface, get rid of the dongle, replace ACCOM software to solve practical problems factories, has some practical value.