The first type: G00 moves the knife, no matter you use the previous plane or the safe plane, the lighter overcuts, and the severer hits the knife.
Solution: Select G01 feed mode output for fast output and give a corresponding value at the same time.
The second type: using the reference tool will lead to tool collision or overcutting, because the reference tool is just an assumption, the actual residual margin of the last tool is not calculated when the tool path is calculated, there are many uncertain factors, which are completely Rely on the programmer's experience to estimate and judge. Generally speaking, there is no problem in steep corners, but the calculation is generally inaccurate in relatively flat corners, such as V-type models.
Solution: The reference knife can be appropriately larger. It is necessary to use a layer-based with trimming, which is mainly to test the experience of the programmer.
The third type: use to follow the periphery when milling the cavity, without hooking the island to clean the wall.
Solution: directly replace with following parts.
The fourth type: When the cavity milling follows the periphery from the outside to the inside, the true down-and-up milling cannot be correctly identified. If you want down-milling, it will be up-milled and follow you. Especially when the bull nose cutter is roughing, up-milling is easy. It flicks the knife, and it is very loud at the corner, or even severely over-cut, the blade is easy to jump off.
Solution: Choose the cutting sequence from inside to outside, of course, you can also consider following parts.
The fifth type: Plane milling, side overcutting or collision. The main reason for this situation is that the model is a figure imported from other software, and there may be intersecting faces or broken faces.
Solution: Check the graphics and trim the model. If the graphics are complex and inconvenient for trimming, you can consider using cavity milling to mill the plane.
Type 6: Suddenly hitting the knife during the cutting process of the fixed axis climbing surface (the knife is dropped or the knife is missed).
Solution: re-stitch the model and extract the B surface when necessary.
Type 7: The first or last cut hits the knife or overcut when there is no part selected in the curved surface drive.
Solution: Fine-tune the start and end percentages of the surface to be small and it's OK.
The eighth type: advance and retreat knife over-cutting.
Solution: Select G01 feed mode output for fast output and give a corresponding value at the same time. Because the lower version does not have this option, the value of the advance and retreat tool must be defined.
The 9th type: accidental use of auxiliary body leads to overcutting.
Solution: To make an auxiliary body without selecting components, carefully check whether the auxiliary body is correct to improve the modeling skills.
The tenth type: The bull nose knife is easy to cut first in 2D finishing.
Solution: Start to increase the plane a little (such as 0.2MM or 0.5MM), you can also consider cheating.
The 11th type: After the roughing is completed, the smooth plane hits the knife. Especially when opening the frame and the light plane, the second knife did not consider the margin of the first knife's corner, and did not set proper round corners to cause the collision angle.
Solution: It is necessary to fully consider what kind of knife is used for roughing, how many corners are set, and then the second knife should also give the corresponding rounded corners.
The twelfth type: the light plane forgets to set the side margin and the tool hits the side because the programmer did not consider the margin left by the front knife.
Solution: Consider the margin left by the previous tool. According to the situation, generally leave about 0.2MM more than the previous tool.
The thirteenth type: The tool path hits the knife or overcut at the rotating body. This situation often occurred in the previous low version, but it is basically gone.
Solution: re-stitch the extracted body, it is necessary to extract the B surface.
Type 14: The program sheet is written wrong and the tool is overcut. For example, it is originally a 25R5 tool, but you write a 30R5 tool, but it is strange that the cutting tool is scrapped.
Solution: It is recommended to use the automatic program sheet. Of course, the operator should also give some thoughts when inputting the NC program. If there is anything wrong, immediately report to the programmer.
Type 15: The cut is scrapped due to the change of the tool path. For example, the two sides of the model are rotated. As a result, if you mirror the tool path, then the cut is over. There are other changes that are the same.
Solution: Before the transformation, the model must be transformed to verify that it is not wrong. If the transformed model overlaps with the original, it is correct.
The 16th type: machining the straight side of the body due to the friction of the knife shank, which leads to over-cutting, especially when the blade is thickened. Due to the wear of the blade, the 90-degree side wall will naturally rub against the tool shank, which will eventually lead to the over-cutting of the elastic knife. .
Solution: Use a shank a little larger than the diameter of the tool, such as 17R0.8, 21R0.8, etc.
The 17th type: The safety height is hit by the automatic plane.
Solution: You can avoid it if you choose a high degree of safety, which is made by yourself, or you choose to have components, or a single post-processing.
Type 18: Drilling and hitting tools on different planes, because drilling generally does not require component selection, and drilling at different heights sometimes hits the knife.
Solution: different plane drilling ideas to avoid, or different planes can separate the program.
Type 19: Depth priority of equal height leads to overcutting. When two or more islands with bevels are connected for full open cutting, the depth priority will overcut and even the tool will be crushed.
Solution: Choose layer first, or consider cavity milling to follow comparison.
Type 20: Knife collision based on layer-fault, the main reason is that the difference between the margins left by the front and rear knives is too small.
Solution: It is recommended that the difference between the margin left by the two knife programs is greater than 0.15, and the following parts should be used.
The 21st type: the blank uses the part offset to cause the knife to hit.
Solution: If a simple model can use modeling commands to offset a blank, if the model is complex, you should consider inserting fake programs based on layers.
The 22nd type: with the R flying knife and the same height, causing the knife to hit the knife.
Solution: Extend a depth of R, or do not remove the tool path tracking, select the trim boundary instead.
The 23rd type: the mold frame has a thick bottom surface and overcut, the reason is thermal expansion and contraction.
Solution: leave a little more bottom margin (for example, leave more than 0.2)
Type 24: The corners of the spiral lower line will cause tool collision, because many machine tools cannot recognize this arc.
Solution: Linear output, or cut along the shape, or follow the periphery from the outside to the inside.
The 25th type: Setting the safety height does not consider the clamp to cause the knife to hit. Novices who have no experience in operating machines are often recruited. Pay attention to the reasons for lack of experience and carelessness.
Solution: Be careful before issuing the program list, improve programming awareness, and use disk processing as much as possible.
