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Post by markwisniowski on Apr 1, 2017 20:43:13 GMT
Here are my first tests cutting aluminium. I overlayed all the settings out of Fusion360 on top of the video to help others see and hear what the CNC will act like.
Enjoy!
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Post by Derek the Admin on Apr 1, 2017 23:21:51 GMT
Nice. Your videos are always really good. Overlaying the settings is a really good idea.
Gonna try to get more aggressive? Say with a 0.3mm stepdown?
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Post by markwisniowski on Apr 1, 2017 23:27:22 GMT
Yep! The purpose of this thread is to get input on where to go next. Feedrate at 700mm seemed to be best with the 2D pocket for that type of cut.
I'll film progress after I get a few suggestions what to do next.
I have to cut dry as of now since I don't have a wet setup.
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Post by mp4doggie on Apr 1, 2017 23:46:48 GMT
Impressive , this is really showing the capabilities of the M3
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Post by Derek the Admin on Apr 2, 2017 12:03:41 GMT
Yep! The purpose of this thread is to get input on where to go next. Feedrate at 700mm seemed to be best with the 2D pocket for that type of cut. I'll film progress after I get a few suggestions what to do next. I have to cut dry as of now since I don't have a wet setup. I usually feed faster on the M3 I use but I have it outfitted with a DWP611 so it has some more umph. I might run about 0.3 or 0.4mm step downs at 800 to 1000 mm/m with a 3.175mm end mill with the DWP611 router on 1 or close to it. 0.4mm at 1000mm/m feed is pushing it pretty hard and more prone to failure. This all requires a good solid build with good tension on the belts. You can derate those settings from there for the spindle. |
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Post by aforww on Apr 2, 2017 12:11:09 GMT
Here are my first tests cutting aluminium. I overlayed all the settings out of Fusion360 on top of the video to help others see and hear what the CNC will act like. Enjoy! You're not even close to pushing the limits so don't be afraid to go at it. Feed per tooth should be around .05 mm or .003 - .002" per tooth. At 12k spindle Speed with a 1/4" bit at that chip load you should be around 1200mm/min. Just by mindful of DOC at that speed. Start at 1mm and go from there. Running it with no coolant is actually worse and slow feed rates because it's building more heat in a given area. Also, remember from my info post that chips are how we remove heat so taking tiny little bites won't accomplish this very well. Good job though. Edit: I didn't consider the torque difference of the 400w spindle as Derek mentioned. I'm not gonna lie. I wanna see you run my settings and see what happens lol. On a side note, what are you using to edit/overlay? I'm working on those tutorial videos and my editing software is annoying me. |
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Post by markwisniowski on Apr 2, 2017 13:32:53 GMT
Here are my first tests cutting aluminium. I overlayed all the settings out of Fusion360 on top of the video to help others see and hear what the CNC will act like. Enjoy! You're not even close to pushing the limits so don't be afraid to go at it. Feed per tooth should be around .05 mm or .003 - .002" per tooth. At 12k spindle Speed with a 1/4" bit at that chip load you should be around 1200mm/min. Just by mindful of DOC at that speed. Start at 1mm and go from there. Running it with no coolant is actually worse and slow feed rates because it's building more heat in a given area. Also, remember from my info post that chips are how we remove heat so taking tiny little bites won't accomplish this very well. Good job though. Edit: I didn't consider the torque difference of the 400w spindle as Derek mentioned. I'm not gonna lie. I wanna see you run my settings and see what happens lol. On a side note, what are you using to edit/overlay? I'm working on those tutorial videos and my editing software is annoying me. I'm ready to push it for sure! In you're response you mentioned a 1/4" end mill and not the 1/8" that I'm using. Do you're numbers still apply? I'm using adobe premiere cc as my edit software. I use it a lot for work and have been using it for years so it's really easy for me to churn out vids and share. |
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Post by Derek the Admin on Apr 2, 2017 17:17:48 GMT
Cutting with a 1/4 will involve more force than a 1/8. Recommendations for chipload change based on the diameter, so your feeds/speed settings will too. I'll also point out that there's a different "maximun load and depth" depending on whether you are doing an adaptive clearing operation or a full slot cut. My figures refer to the edge of cutting at the full width of the cutter which will involve more forces than trochodial milling (adaptive clearing).
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Post by markwisniowski on Apr 2, 2017 19:56:49 GMT
Cutting with a 1/4 will involve more force than a 1/8. Recommendations for chipload change based on the diameter, so your feeds/speed settings will too. I'll also point out that there's a different "maximun load and depth" depending on whether you are doing an adaptive clearing operation or a full slot cut. My figures refer to the edge of cutting at the full width of the cutter which will involve more forces than trochodial milling (adaptive clearing). Here are my settings for setting DOC, am I using them correctly regarding "maximun load and depth"?  |
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Post by aforww on Apr 2, 2017 23:32:39 GMT
I'm ready to push it for sure! In you're response you mentioned a 1/4" end mill and not the 1/8" that I'm using. Do you're numbers still apply? I'm using adobe premiere cc as my edit software. I use it a lot for work and have been using it for years so it's really easy for me to churn out vids and share. Ahh sorry. Yea 1/4" bits will tolerate more tool load than the smaller ones will. The chip load is also less at .0005-.001. If you're using Fusion just input your spindle speed and then your desired chip load and those settings should be dead on. Here's what I got in my calculator at a 1/16 doc.  |
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Post by markwisniowski on Apr 5, 2017 15:07:04 GMT
So I bumped up the feedrate, depth of cut and step over last night. Jumped from 700mm/m feedrate to 1200mm/m and .5mm DOC. Surprisingly it was keeping up! The chips where larger and I was overall happy with the finish but there was one thing I didn't expect....the LOUD NOISE.
Had to stop milling late last night because it was just too loud for 11pm at night.
Now I'm researching Soundproof enclosures...
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Post by aforww on Apr 5, 2017 15:49:16 GMT
So I bumped up the feedrate, depth of cut and step over last night. Jumped from 700mm/m feedrate to 1200mm/m and .5mm DOC. Surprisingly it was keeping up! The chips where larger and I was overall happy with the finish but there was one thing I didn't expect....the LOUD NOISE. Had to stop milling late last night because it was just too loud for 11pm at night. Now I'm researching Soundproof enclosures... Right on. Bigger chips is a good thing as long as you're not hacking away at it lol. Noise with metal is a given. |
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Post by Derek the Admin on Apr 5, 2017 20:10:18 GMT
Yup. It's going to be loud for sure. Glad you are pushing the envelope. You don't know the limit until you hit it.
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