Tapers and ovals that appear in CNC lathe processing are usually caused by processing parameters, workpiece clamping, tool wear, or problems with the machine tool itself. Here are some common workarounds:

1. Check the fixture and workpiece clamping:

Ensure that the CNC lathe workpiece is clamped firmly on the fixture and the clamping force is evenly distributed to prevent the workpiece from moving or shaking during processing.

Check whether the fixing bolts of the CNC lathe fixture are loose, whether the position of the fixture is correct, and whether the contact surface between the fixture and the workpiece is clean and flat.

2. Adjust tool setting:

Use a special tool setting instrument or the tool setting function that comes with the CNC lathe to accurately position the tool and tool setting to ensure that the tool is correctly aligned with the workpiece surface.

3. Check tool wear and tool fixation:

Regularly check the wear of CNC lathe tools, and replace seriously worn tools in a timely manner to avoid uneven tool wear that leads to a decrease in processing quality.

Ensure that the CNC lathe tool clamping device is firm and reliable to prevent the tool from shifting or shaking during processing.

4. Adjust processing parameters:

Timely adjust CNC lathe processing parameters, including feed speed, spindle speed, cutting depth, etc., to improve processing stability and accuracy. It may be necessary to reduce the feed rate or increase the depth of cut to improve machining quality.

5. Check the CNC system and machine tools:

Check whether the settings and programs of the CNC lathe CNC system are correct and ensure that the processing path and processing parameters meet the requirements.

Regularly check the mechanical structure of the CNC lathe, including guide rails, screws, spindles and other components, to ensure that the machine tool operates stably and with good accuracy.

6. Repair machine tool problems:

If problems are found in the machine tool itself, such as worn guide rails, loose screw rods, etc., repair and adjust them in time to ensure the normal operation and processing accuracy of the machine tool.

Through the above methods, CNC lathes can effectively solve problems such as taper and ellipse that occur in CNC lathe processing, and improve processing quality and stability. If the problem still exists, it may be necessary to further analyze and adjust various aspects of the processing process to find the root cause and make corresponding improvements and adjustments.