Hydraulic hose crimping machine can now provide any workshop with a retractable ball bar detector, which can be used for the rapid detection of machine tools. The detection task can be completed within 15 minutes to maintain the accuracy of machine tools. The tool's geometric accuracy, roundness and stick slip error, servo gain mismatch, vibration, backlash and repetition accuracy and scale can be accurately evaluated by using clue detection mismatch. Some club software diagnosis can provide specific errors according to ISO 230-4 and ASME B5.54 and b5.57 standards, and then provide a general English list, and list various error sources according to the overall impact on machine sequence accuracy. In this way, the machine maintenance personnel can directly go to the problem area for handling. The development trend of machine tools and the clue test stage of performance. Preventive maintenance is conducive to deviation from the machine's pre planning before processing capacity. The industry tends to calibrate machines on demand rather than on time. There is no reason why maintenance and outbound is engaged in the production of complete machines to calibrate. When something abnormal is found, or it is allowed to test the ball club and production parts to determine.