Function of Tool Setter

Qidu Metrology

When NC machining products, in order to ensure the accuracy of workpiece processing and production, it is necessary to correct the position origin of the tool, which is the most time-consuming and skill testing work.

For CNC machine without tool setter, the offset value of each tool can be known only after measuring, calculating and compensating the size of the workpiece (manual tool setting) after trial cutting the workpiece with each tool, and the workpiece will be scrapped if you are not careful. After changing the tool, this work needs to be carried out again. It can be said that tool setting is one of the work contents that occupy the longest auxiliary time of the machine tool.

The machine equipped with tool setter can automatically set the offset value of the tool to the workpiece coordinate system after tool setting, so that the workpiece coordinate system can be established automatically. In this way, the setting of workpiece coordinate value can be easily realized. It can be said that the use of tool setter not only saves time, but also improves efficiency.

Because of this, all kinds of CNC engraving machines, engraving and milling machines, jade engraving machines, mold engraving machines, woodworking cutting machines and other models are equipped with tool setters to facilitate wo

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1. Measure and compensate the tool deviation in the five directions of ± X, ± Y and Z axes
Measuring and compensating the tool deviation in five directions can effectively eliminate the error and low efficiency caused by manual tool setting. No matter what cutting tools are used (outer circle, end face, thread, groove, wok hole or milling and drilling power tools on the turning center), when turning or milling the workpiece contour, all tool tip points or tool axis lines involved in cutting must be adjusted or compensated to make them accurately located at the same theoretical point or axis line of the workpiece coordinate system. For power rotary tools, in addition to measuring and compensating the offset value in the length direction of the tool, it is also necessary to measure and compensate the offset value in the diameter direction of the tool (the offset value of the two radii of the tool divided by the axis). Otherwise, the machine cannot process the workpiece with correct size.

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2. Automatic monitoring, alarm and compensation of tool wear or damage during machining
It is very troublesome to complete the compensation of wear value on the machine without tool setter. It is necessary to stop the machine for many times to manually measure the size of the workpiece, and manually modify the tool compensation parameters of the obtained wear value. After installing the tool setter, this problem is much simpler, especially after installing DTS200 or DMTS-L. As long as the machine is stopped after a certain number of workpieces are finished according to the wear law of the tool, and the tool setting process can be carried out again with the tool setter; Alternatively, as long as the number of machining cycles is set in the program and the automatic tool setting is executed once, the tool compensation can be completed.
For tool breakage alarm or replacement after tool wear to a certain extent, set a “threshold value” according to the allowable wear amount of the tool. Once the error monitored by the tool detector exceeds the threshold value, it is considered that the tool has been damaged or exceeded the allowable wear value, the machine tool will automatically alarm and stop, and then force the replacement of the tool.

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3. Compensation of tool deviation caused by thermal deformation of machine tool
The working accuracy of the machine will be affected by the heat, especially the position of the lead screw in the working process of the machine. The above problems can be solved by installing a tool setter on the machine tool. The change of tool tip position caused by thermal deformation is regarded as the wear value of the tool, and the tool offset value can be measured by the tool setter.


Post time: Apr-08-2022