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CNC Learning


 
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David G
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Joined: 11 Jan 2008
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PostPosted: Mon Apr 16, 2018 6:43 am    Post subject: CNC Learning Reply to specific post Reply with quote

I had a good weekend learning G code, got the simple stuff down now. I do not need to worry about making parts fast, and do not have an automatic tool changer. On my first round of coding, I just started on the part from left to right, but there were some operations I skipped because of tool change required. I am going to start programming and do all the operations that require one tool, then change tool and do next round. I also want to take a small drill and pre-bore any holes, as I can then check it for accuracy, and the plunge milling really likes the pilot holes anyway.
 
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dr sportster
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PostPosted: Mon Apr 16, 2018 7:13 am    Post subject: Re: CNC Learning Reply to specific post Reply with quote

I did not realize you were teaching this to yourself. What books do you have ?
 
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Steve@Advance
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PostPosted: Mon Apr 16, 2018 7:15 am    Post subject: Re: CNC Learning Reply to specific post Reply with quote

So will you be able to do circular interpolation, radius and arcs, engraving with with it?
 
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David G
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PostPosted: Mon Apr 16, 2018 7:30 am    Post subject: Re: CNC Learning Reply to specific post Reply with quote

I have the list of G code, just go on internet and read examples and watch videos.
 
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David G
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PostPosted: Mon Apr 16, 2018 7:31 am    Post subject: Re: CNC Learning Reply to specific post Reply with quote

I would assume so, did my first circle, now need to learn how to hog out the inside.
 
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leroy in ne
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PostPosted: Mon Apr 16, 2018 7:43 am    Post subject: Re: CNC Learning Reply to specific post Reply with quote

You mentioned predrilling to check locations. I suggest using a combination drill also known as a center drill, such as a # 4 unless you mare doing an extremely small hole then a smaller size
 
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Eric in IL
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PostPosted: Mon Apr 16, 2018 8:26 am    Post subject: Re: CNC Learning Reply to specific post Reply with quote

Are you able to use any canned cycles ? If not maybe you can write some sub-programs to be called up when needed often . A canned cycle for milling a circle with a ramp-on/off radius is nice, and saves doing a lot of trig. calculations.
 
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Eric in IL
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PostPosted: Mon Apr 16, 2018 8:34 am    Post subject: Re: CNC Learning Reply to specific post Reply with quote

Drill the hole 1/32" undersize whenever possible.
 
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Shoprat
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PostPosted: Mon Apr 16, 2018 8:54 am    Post subject: Re: CNC Learning Reply to specific post Reply with quote

What spindle taper to you have?
 
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David G
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PostPosted: Mon Apr 16, 2018 8:58 am    Post subject: Re: CNC Learning Reply to specific post Reply with quote

I will have to lookup these questions.
 
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Jim PA
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PostPosted: Tue Apr 17, 2018 3:34 am    Post subject: Re: CNC Learning Reply to specific post Reply with quote

If your software is capable of 3 axis programing skip the drilling and ramp mill the bores to rough them out. Then go back and finish the bores using cutter compensation to control size. Plunge milling with an endmill is not the way to open a hole and is harder on your machine.
 
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