If you wanted to take advantage of the separate T and M06 to give your machine maximum time to get ready in order to make the tool change faster, you’d do something like this: If the machine doesn’t use M06, the sample would look like this: On those machines, it is likely an error to use an M06. On most lathes, and even for some mills, the M06 is not needed. This gives the ATC a little bit of advanced warning, allowing it to rotate the new tool into position while the machine is busy doing something else, which can make for a faster tool change. On a VMC with ATC, usually the “T” word tells the mill to select that tool, but it requires the M06 word to be executed before the tool is actually changed. The “T” word is commonly used to select a tool.
Let’s go through each possible g-code and it’s style of use. It will adjust its notion of where the tool tip is when you make your next move based on this.Īccomplishing these two functions can require anywhere from one to several g-codes. The tool length offset tells the CNC machine how much the length of the current tool differs from tool #1. The second role of these codes is to set up a different tool length offset. First, in the case of a machine with an automatic tool changer (ATC), the tool changing g-codes tell the ATC to load a particular tool in the spindle or, in the case of a lathe, to rotate that tool into position on the lathe’s turret. That’s because the tool change programming serves two purposes. This will be true even if your machine doesn’t have an automatic tool changer. Most CNC g-code programs will have one or more g-code tool changes programmed into them. Tool Changes and Tool Offsets in G-Code CNCCookbook’s G-Code Tutorial G-Code Tool Changes
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