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  #11  
Old 04-18-2016, 04:40 PM
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Gary Campbell Gary Campbell is offline
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Mike...
Let me give you a suggestion. Start with the basics and gain proficiency before you attempt more complicated designs. The more complicated the piece, the more critical the basic components become as you attempt to combine and overlay them.

This is a common mistake new CNC users make. It is akin to believing you can handle a college level trig class before you have completed high school algebra. The basics are needed as building blocks to the advanced.

Teaser: To show that it's true, I'll show you that you don't need any of the gadgets for rotary toolpath creation, in fact you don't even require the rotary wrapped setup to cut most anything. And what is most prolific in the video, replacing 3D cutting with 2D profile cutting.
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  #12  
Old 04-18-2016, 05:42 PM
rcrawford rcrawford is offline
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Quote:
Originally Posted by Gary Campbell View Post
Mike...
Let me give you a suggestion. Start with the basics and gain proficiency before you attempt more complicated designs. The more complicated the piece, the more critical the basic components become as you attempt to combine and overlay them.

This is a common mistake new CNC users make. It is akin to believing you can handle a college level trig class before you have completed high school algebra. The basics are needed as building blocks to the advanced.

Teaser: To show that it's true, I'll show you that you don't need any of the gadgets for rotary toolpath creation, in fact you don't even require the rotary wrapped setup to cut most anything. And what is most prolific in the video, replacing 3D cutting with 2D profile cutting.
This is probably the most important technique you can teach ANYONE using a CNC machine, not just a rotary axis!!!!
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  #13  
Old 04-18-2016, 08:19 PM
mike.davison mike.davison is offline
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Oh, man, Gary, that's like tossing a steak in front of a junk yard dog. ;-) Trig, algebra....

Ok, I have a start on that leg, created solely with Aspire. I need to dig out my dovetail bits and add at least one to the tool database. The 3D finishing pass is with a 1/4 BN, which leaves the leaf details rather bland (Rest Machining perhaps?) No legs yet. No top yet. But it's a start. No more time for this today, but I'm (hopefully) attaching the file.
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File Type: crv3d 3 legged table.crv3d (7.12 MB, 21 views)
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  #14  
Old 04-04-2020, 08:02 PM
DVE2000 DVE2000 is offline
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Originally Posted by rcrawford View Post
Haven't seen that video before. Looks to me like it was hand coded.

If anyone wants to cut a continuous spiral rounding toolpath like what he was using, just bring the bit to the desired start position and type in:

G02 A11520 Y4

This will cut 4" along the Y axis, taking 1/8" cut.

He had several tool changes, and expensive tools (some pretty specific plunge profile bits).
Russell, I think the G02 is a typo. It should probably be G1, right? (I stumbled across this while using google to search for Gary's post about quickly zeroing the A-Axis without having to reverse it - L28.1) G2 is a clockwise arc, and G02 isn't in the manual.
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Last edited by DVE2000; 04-04-2020 at 09:13 PM.
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  #15  
Old 04-05-2020, 10:00 AM
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Gary Campbell Gary Campbell is offline
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Gary...
Yes, most likely a typo. G2 = G02, G1 = G01, etc. Da "OH" be silent

L28.1 does not in any way "zero" the rotary axis, or change its position. It removes the wraps.


Here is a link to the lesson with an annotated file and video: https://www.camheads.org/showthread.php?t=7358
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  #16  
Old 04-05-2020, 01:38 PM
DVE2000 DVE2000 is offline
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Thanks, Gary! I appreciate it. Yeah, I realized it doesn’t zero after playing with it. It just gets you between 0 and 360 degrees.

That lesson is going to be VERY useful.
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