Originally Posted by TCGliderguy  O.K.... so let's take this from the simplest level. Let's say that I just want to cut out 2D parts (like could be done by hand with a scroll saw).
I draw up my part in a CAD program...(I happen to have VectorWorks, TurboCad, and a couple of others that I can't even remember). I export the drawing as a DXF file.....
So now it needs to be converted to G Code, right? If Ace Converter (for free) will do the job, then why would I need anything more sophisticated? (Based on my simple, 2D example....) |
Lots of reasons.
1)Say ACE may want to cut in a certain direction, but you want to cut in the opposite direction. A CAM program will let you switch with a simple click or two.
2)ACE will program the tool so that the center of the tool follows the lines you've drawn. So you'll need to offset the lines in your CAD program 1/2 the tools radius, in order to get your parts the right size. CAM programs will create the correct toolpath automatically.
3)ACE will plunge the tool straight down into the work, which is bad for your router bearings as well as for the tool. CAM will let you ramp in gradually, and even give you several options for ewntering the cut from outside the actual part, to prevent gouging that may occur from the entry into the part.
4)Pocketing. Sure, you can pocket with ACE, but you'll have to draw all the toolpaths to clean out the pocket yourself. CAM can do pocketing with only the pocket border being drawn.
5)Drilling. ACE doesn't do drilling, but most CAM programs do.
Basically, with ACE, you need to actually draw the toolpaths that the tool will follow. Wherever you want the tool to cut, you draw a line (or arc).
With CAM software, you draw the part and let the software create the toolpaths.
Originally Posted by TCGliderguy
Once converted, the G Code goes into Mach3.... and it controls the steppers, right?......
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Sort of. Mach3 controls the stepper drives, which actually control the steppers.