Preventing Collision Knife Tips When Operating CNC Lathes

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Custom CNC Lathe

A knives is a machine accident in which a tool (including a tool holder, a carriage, etc.) accidentally collides with a work piece, a chuck or a tailstock during a movement. The collision knife is the most likely accident that occurs when a novice CNC lathe is operated. In the case of a knife accident, the lighter affects the accuracy of the machine tool, and the heavy machine damages the machine tool, which must be highly valued by the operator.

In order to prevent the occurrence of a knife collision, it is recommended that the work should be done in two aspects: the operator and the program:

Operators should pay attention to the following points:

(1) Always check whether the lathe limit stop is in the correct position and whether it is loose; (but it should be noted that the machine limit can only be used at the limit position of the machine. Due to the different position of the tool, the work piece blank size is different. In the case of other conditions, in most cases, the machine limit is not effective in preventing the impact of the knife during the machining process.

(2) After the program input is completed, it is necessary to carefully check whether there is an error and avoid the collision caused by the coordinate number input.

(3) Correctly set the tool and set the tool compensation. Pay attention to the Z-direction test cutting tool. It must be noted that the Z-direction zero point used for the tool should be unified with the Z-direction zero point used for programming to avoid collision caused by the inconsistent setting of the work piece coordinate system. Knife.

(4) When the start phase is running, set the fast override to be slower (for example, set to 25%).

(5) After programming, you should perform single-segment debugging and switch the display screen to the page where you can see both the work piece coordinate system and the program being executed.

(6) At any time during the debugging process, pay attention to the current absolute coordinate value and the end point coordinate position of the next block to determine the distance the tool will move, and then observe the distance between the current tool position and the work piece position to determine whether it is possible to collide.

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