A friend chatted with me about his experience of hitting a knife in his CNC career and the reasons for it. The mood at that time was terrible, let's take a look at the pits where the knife hits today!
1. When I was working just now, I drove a Japanese wire walking machine. No computer CAM programming. The yellow box of the FANUC programming machine used. PTP paper take away program, cut a 8-shaped circular die opening. The simulation (everything is normal when drawing the track) was stuck when threading the paper tape, and all 8 holes were punched, and the holes were useless. As a result, when I came to this place, I cut it sideways. Fortunately, it was wire cutting, so the work was useless, and the bed was fine.
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2. Later, the German Hellingen single-arm gantry milling machine was opened. This bed has a special function that the Z (spindle head) and W-axis (single-arm crossbeam) strokes are superimposed. Z stroke 550. W stroke 1550. If I run Z -800 in the program, Z and W actually move together. Z goes 550, W goes 250? Or Z go 250 W, go 550 or something else? This requires a special post-processor to process the cls toolpath files generated by the original proE. This post-processor (a program written by a German engineer, the buttons one by one are like flying a fighter jet, and the operation is very cumbersome.) It is very easy to make mistakes in the operation of the workpiece.
Then... as expected, it was wrong. Milling a recessed casting internal parts mounting table, one go through the program, huh? The main shaft sleeve did not go away, and the beam went down with a whoosh. Click! Fortunately, the partner reacted quickly and slapped him for an emergency stop, only the lighting tube was broken.
Who said: "The more you hit with knives, the better your skills, and the true knowledge comes from practice!" This truth is good for the front-line workers to know, and the boss will feel distressed if he knows it. Even thinking about it makes me afraid, and the more I work, the more timid I become. It's easy to say these things now, but every time I hit a knife, I feel frightened... Sigh!
