![]() Alright, minimum tool path radius looks good, percent of tool- So you take a look at these things here, and because this is a roughing operation, you generally want to leave a little bit of material on the walls as well as the floor. Now we are going to be going to full depth with this cutter, so that might be a little bit heavy, so let's go ahead and say, let's use like 13 or 14%, let's say type 14 there, and that's going to be only 70 thousandths, which is fine, but I'm going to be cutting 1.25 deep so you can see I'm using the entire flute length of my tool so I don't want to take that big of a radial cut. So you look at the stepover, that's going to be 25% of the tool so it's an eight of an inch of a cut. I'm going to make sure that I'm doing a climb operation. I'm go ahead and just define it under parameters. I'm going to choose this half-inch endmill. Alright, so right over here and choose a tool. But in this one I'm going to be focusing on dynamic mill, so here it is. These are all pretty much dynamic tool paths or what we call HighSpeed tool paths. And then the same thing as blend mill, another cool way, you're just kind of going back and forth but you're removing that material as you go. This is pretty much going to be removing some material across and you're just kind of peeling that material away, so it's a very efficient tool path. Notice these little loops it's doing here, when it gets into there. I can also do this dynamic contouring so you can use that for just doing a contour but not over-engaging that tool when you get into these corners. But I could switch over here to area mill, so notice what the picture down here will change to if I change to area mill, it's doing more of a kind of a traditional pocket there. Click OK, and right over here we've got dynamic mill selected. As far my machine region, I'm going to choose the bottom of that pocket right there, and if you go over to chains you can see it's just that one chain. Let's go ahead and just choose the very first one here, dynamic mill. So these are pretty much different variations of the same dynamic milling tool path. Okay, so head up here to 2D HighSpeed tool paths, and you can see I've got this dynamic mill, I've got this dynamic contour, I've got area, peel, and blend. ![]() Now this is generally a roughing operation, we just want to get that material out of there, and that is where dynamic milling really shines. Now right over here, you can see I've taken the same part we've been working with and I've put a big pocket in the center of that. So let's go ahead and jump into MasterCAM and I'll show you how it works. That makes it so you can go full speed ahead into the corner and not even have worry about it, because that allows you to maximize your tool path feed rate and not have to worry about breaking that tool when you go into a corner because the software is calculating how to not over-engage the tool. So as you get into a corner the machine backs off and instead of going straight into the corner, it may do a few loops in the corner, so you're not engaging any more than you defined in your tool path. So that's what the adaptive contouring, the dynamic milling, some of these adaptive tool paths, what they do is make the cutter engage the same amount of material no matter where it is in your tool path. So, we get chatter, we might even break the tool, or it really depends on how fast you're going with that tool and that's a problem. So- and that can really cause a lot of trouble. And all of a sudden, now that engagement goes up to over half of the tool, so it goes up by 50% or 100%. Now as you get into the corner of that pocket, bad things start happening because you were about a quarter of the tool engagement. ![]() So traditionally if you had a regular end mill and you're machining on a pocket, as your going down a straight edge of the pocket, you're engaging maybe a quarter of the end mill. They're what's called a constant engagement tool path. Some companies call it adaptive contouring, but all these type of tool paths are pretty much the same. Now, different companies use different names for the same thing. But the companies who are developing this style of tool path have been doing a lot of work over the past few years. Now dynamic milling has not been around for that long, maybe like 10 years. In this video, we're going to be talking about dynamic milling.
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