Dongguan Leda Metal Co.,Limited
Hey guys! Look at there. I will completely guide to you 4 Axis CNC Machining.
In this guide you`ll learn:
but today, we come to the Chapter 1. Lets go:
4th Axis machining is an interesting and important sub-part of the CNC milling world.Haas actually got it`s start building a 4th axis before it ever built entire CNC machines (pictured as shown below). This is an article series to help beginners understand how and why a 4th Axis is used on CNC Mills. In the first installment, we`ll look at what a 4th axis is used for. In the second, we`ll look at how they work.
If you`re new to CNC, your first impression may be that the 4th axis is used in the same way a rotary table is used for manual machining. Indeed, there are many projects out there where someone converted a manual rotab to become a 4th axis. While there is a grain of truth to this idea, largely it`s incorrect.
Most manual machining 4th axis work is about cutting features along an arc, something that`s hard to do with a manual machine. With CNC, cutting along an arc is easy–that`s what the G02 and G03 g-codes are for. There are cases where we do continuous machining with a 4th axis–in other words, we want the cutter to be machining as the 4th axis turns. But there are also many other applications.
A 4th axis is typically either used in an [indexing" mode or a [continuous" mode. When indexing, no cutting happens until the 4th axis is stopped (and often locked with a brake of some kind). In fact, there are some types which are called [indexers" that can only be used to index in fixed degree increments rather than continuously rotating to any desired position. By contrast, [continuous" means that machining happens as the part is being rotated.
You may wonder why you`d ever want anything but continuous machining, but bear with me–there are lots of useful ways to take advantage of indexing. Also, you`ll need much fancier CAM software to program continous machining. It`s very powerful, but plenty of work (perhaps even the majority of 4th axis work) is done simply with indexing.The most obvious case for indexing is to gain better access to the part. Suppose you`re making something complex, like a gear:
The 4th Axis indexes each tooth into position, stops, and then the cutter makes a pass back and forth until the tooth is done. They the next tooth is indexed into position.
Gears are kind of an extreme case because it would be hard to imagine how to make one if we couldn`t index the teeth. But, there are much simpler cases where indexing is also extremely helpful. Suppose you have a part like a throttle body that has holes on all sides. You could build fixtures and do a bunch of setups, one for each side. Or, you could also use a 4th axis to index the sides so more than one can be machined with a single setup.
Ok,today,lets stop there! Tomorrow I will explain Chapter II to you,bye~
In addition, if you want to know more about 4th axis machining, you can add my whatsapp(+86 18826568303) or send inquiry to me for in-depth discussion~
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