Tool Holder (not the exact holder, just the same brand and model).Chatter is highly repeatable and largely depends on just four variables: If your shop is fortunate enough to be taking a scientific approach to chatter, you can probably quit worrying about chatter when choosing your deflection limits. If you’re in a tough situation and need a higher deflection limit, turn of Limit Chatter and dial up the Deflection Limit until you hit a Tool Life value that is as low as you can stand. For example, at 20% of max chipload, Tool Life is 92% of normal.
![plunge mill pocket in mastercam x9 plunge mill pocket in mastercam x9](https://i.ytimg.com/vi/6EFJw7A4yTI/maxresdefault.jpg)
It also tells you the impact on Tool Life. It lets you set a Deflection Limit that is a percentage of maximum chipload. Deflection Limit: If you turn off “Limit Chatter”, this area is enabled.This helps reduce tooling marks in the wall of the cut for better surface finish. Best Finish: Chooses a much lower limit if you are in the Finish (non-Roughing) portion of the Tortoise-Hare slider.Limit Chatter: Chooses a very conservative deflection limit that helps avoid chatter.You can override G-Wizard’s Deflection Limit on the Setup Other tab… G-Wizard provides a means to change that limit on the Setup Other tab: That being the case, you can probably tolerate a higher deflection limit. You could just forge ahead and choose to deal with chatter if it comes up. If you’re going for broke on your Material Removal Rates or you are having to deal with deep pockets that won’t accommodate large enough tools, you need to consider more aggressive strategies. Deflection Limits for Deep Cavity Machining It’s CADCAM Wizards will optimize both Cut Depth and Cut Width to avoid deflection right up front.īut G-Wizard’s best feature for dealing with Deep Pockets is the ability to fine tune exactly what the right amount of deflection should be for your cut. G-Wizard’s Cut Optimizer makes it easy to calculate the optimal Cut Depth or Cut Width needed to keep Tool Deflection under control. G-Wizard has a couple of tools to assist with this. Once we know how much deflection there is, we stand a chance of optimizing our cutting parameters to minimize it. This requires that we use a feeds and speeds calculator capable of predicting Tool Deflection, like our G-Wizard Calculator.
![plunge mill pocket in mastercam x9 plunge mill pocket in mastercam x9](https://i.ytimg.com/vi/kh4S9NPx8_8/maxresdefault.jpg)
The next thing is to be aware of deflection. So, large tool diameters and short stickouts are probably not available to us. Of course this article is about Deep Pockets, which are only deep in comparison to their tight corners. The first thing is to minimize tool stickout while maximizing tool diameter. In addition, excessive deflection can lead to chatter as well as wall taper, poor wall finish, and generally poor tolerances. So, if we allow deflection to reach 50% of chipload, our tool life will only be 60% of normal. As I mentioned, deflection behaves just like runout. The graph is for runout as a percentage of the allowable chipload vs tool life. A little too much and the tool’s life is reduced exponentially. Way too much and the tool snaps immediately. Think of tool deflection as being addition to chipload, and similar to runout in its effect on tool life. The further the tool sticks out and the smaller its diameter, the more a given force can bend the tool. Tool Deflection happens when sideways cutting forces bend the tool. Tool Deflection for Deep Cavities and Long Reach Situations The rest of the article gives you an even deeper dive on these techniques. Here’s my CNC Chef video from Cutting Tool Engineering magazine to provide a quick intro to Deep Pocket and Deep Slot Milling: Let’s go over the different techniques that are available to address these issues. The answer is to use proven techniques to proactively address the challenges of Deep Pocket Milling that we know are there.
Plunge mill pocket in mastercam x9 trial#
How can we make Deep Pocket Milling more of a science and less trial and error?
![plunge mill pocket in mastercam x9 plunge mill pocket in mastercam x9](https://i.ebayimg.com/images/g/8v4AAOSwZd1Vbf-G/s-l400.jpg)
Tate reports taking 0.030″ depth of cut passes and 600 rpm were the secret, discovered after some trial and error experimentation and a broken endmill. With a part like that, if the tool doesn’t chatter from the long reach the thin walls will chatter. Couple all that with thin walls and you have this part Eric Tate recently showed on the Yahoo Tormach forums:ģ.125″ deep pocket, 3/8″ endmill, and thing walls too! Using long or extended reach tools to reach down into a deep pocket situation leads to problems with:Īll this adds up to poor tool life, breakage, and longer cycle times. Whether you call it Deep Pocket, Deep Cavity, or Deep Slot Milling, dealing with extended reach situations is one of the hardest problems in machining. Click here to learn more about the Master Class.
Plunge mill pocket in mastercam x9 free#
Note: This is Lesson 18 of our Free Email Feeds & Speeds Master Class.