Commanding G40/G41/G42 with an arc move will cause a diameter compensation error that will stop the program. Note: Cutter comp turns on or off with a line move, but never an arc. Figure 1 shows how CDC Right (G41) causes the tool to move to the right of the programmed path to adjust the feature size. This allowed me to program toolpaths centered along part features rather than needing to offset the tool path geometry to compensate for the tool size. When I originally started programming by manually writing G-Code, I used cutter comp to offset the tool by the radius. What is Cutter Compensation?Ĭutter compensation (cutter comp), also sometimes called Cutter Diameter Compensation (CDC), provides a way to adjust the toolpath at the machine to compensate for tool size, tool wear, and tool deflection. So I thought it was time to write something about it. But, I’ve also started to see that there are a lot of people not using cutter compensation to adjust the size of their features. I always say that whatever process you have that makes good parts and is profitable is an acceptable process. He explained that he needed to bore another 0.0015″ larger, so he went into Fusion 360 and entered negative Stock to Leave to adjust the size. I watched all of this activity, and once the part was done I asked what he did. He reposted the program and re-ran the bore operations. After a part was done, he measured a bore, punched some numbers into his calculator, ran back into his office, and made some adjustments to his program. Most of his business involves rapid prototyping parts for Silicon Valley and Bay Area companies. He is someone I would consider a competent machinist, programmer, and businessperson. Learn about the different types of cutter comp and when to use them.Ī few days ago, I was at a friend’s shop. Cutter compensation can add accuracy and automation to your manufacturing process.
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