What are the common errors during tool setting on a vertical lathe?

I. Human Operation Errors

Trial Cut Measurement Error: Inaccurate workpiece dimension measurement after trial cut, or deviation due to visual judgment of contact position during operation.

Parameter Input Error: Incorrect coordinate input of tool compensation parameters, omission of decimal points, or confusion between metric and imperial units.

Contact Force Error: Insufficient contact force of the tool during tool setting leads to coordinate shift; excessive contact causes slight deformation of the workpiece.

II. Tool Clamping Errors

Tool Tip Height Error: Mismatch between the tool tip and the workpiece's rotation centerline causes the actual trajectory to deviate from the theoretical contour.

Tool Holder Reference Error: Loose fit between the tool holder and the turret; tool holder wear and deformation cause reference shift.

Multi-Tool Reference Error: Inconsistent reference when multiple tools are used, with the workpiece end face not being used as the Z-axis zero point.

III. Equipment System Errors

Instrument Measurement Error: Deviation caused by insufficient manufacturing and installation precision of the instrument when using a tool setter.

Zero-point drift error: Zero-point drift occurs during the machine tool's return to the reference point, causing zero-point return error.

Dynamic stiffness error: After static tool setting, the actual dimensions differ from the preset dimensions due to cutting forces and vibrations during machining.

IV. Machine Tool Geometric Errors

Spindle rotation error: Spindle radial runout causes the workpiece rotation center to shift, affecting the accuracy of the tool setting reference.

Guideway motion error: Deviation in guideway straightness causes the tool holder's movement trajectory to deviate from the theoretical position, which is transmitted to the tool setting results.