1. Accurate workpiece size and poor surface finish

Causes: The tool tip is damaged and not sharp; The machine tool resonates and is placed unevenly; The machine tool has crawling phenomenon; Poor processing technology.

Solutions: If the tool is worn or damaged and not sharp, regrind the tool or choose a better tool to readjust the tool; If the machine tool resonates or is placed unevenly, adjust the level, lay a foundation, and fix it smoothly; The reason for mechanical crawling is severe wear on the guide rail of the carriage, wear or looseness of the screw ball. The machine tool should be maintained carefully, and the iron wire should be cleaned and lubricating oil should be added in a timely manner after commuting to reduce friction; Choose a coolant suitable for workpiece processing and try to choose a higher spindle speed.

2. The phase light of the driver is normal, but the size of the processed workpiece varies from large to small

Causes: The machine tool carriage has been running at high speed for a long time, resulting in wear and tear on the screw and bearing; The repeated positioning accuracy of the tool holder deviates during long-term use; The drag plate can accurately return to the processing starting point every time, but the size of the processed workpiece still changes. This phenomenon is generally caused by the spindle, and the high-speed rotation of the spindle causes severe bearing wear, resulting in changes in machining dimensions. Metal processing, good content, worth paying attention to.

Solutions: Use a dial gauge to lean against the bottom of the tool holder, while editing a fixed cycle program through the system to check the repeated positioning accuracy of the drag plate, adjust the screw clearance, and replace the bearing; Check the repeated positioning accuracy of the tool holder with a dial gauge, adjust the machinery or replace the tool holder; Use a dial gauge to check whether the processed workpiece accurately returns to the starting point of the program. If possible, repair the spindle and replace the bearing.