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 Posted 3/29/2018 1:23:32 PM |
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Supreme Being
 
Last Login: 4/6/2024 5:28:59 PM
Posts: 1,684,
Visits: 5,334
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Experimenting with my CNC Router.
This is big enough that I got to practice splitting it. I think it was fine, although hard to tell as there were some milling problems with the right half, and part of that was it didn't cut the divided part in the middle.
Tried two different milling strategies. Obviously the one on the left worked better.  The wavy lines on the left side are suppose to be that way, so that's good. I only ran this one on rough cut and didn't do the finish cut, that's why some of the detail is missing. Milling strategy used on the right half caused the motors to bog down by the end and caused the machine to start to cut off line.
In the end, I've learned a lot about setting up the software.
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| Posted 3/29/2018 6:11:51 PM |
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Junior Member
Last Login: 5/10/2020 8:35:22 PM
Posts: 40,
Visits: 473
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| That's awesome! Definitely a unique bat item!
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| Posted 3/30/2018 5:20:04 PM |
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Supreme Being
Last Login: 4/6/2024 5:28:59 PM
Posts: 1,684,
Visits: 5,334
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Ran the Gotham Manhole Cover program again but resized it so I could do the whole thing on my machine. Rough cut went great. It looked clean and crisp. only thing is the G and A don't finish. I guess because the quarter inch bit is too big. The finishing pass is done with a eighth inch bit and fixes the G and A but left all the edges rough. Not happy with that.
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| Posted 3/30/2018 9:07:01 PM |
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Has NO LIFE!!
Last Login: 12/4/2023 11:08:55 PM
Posts: 3,232,
Visits: 5,166
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Hey sly,
Looks great.
I use meshcam/machmill on my 4 axis milling machine.
Most problems I had in the past were caused by using too fast feed rates and too fast rapids.
Motors would jump steps.
I solved most of my problems by keeping my bit cut rates SFM (surface feet per minute) (not the same as bit RPM) about 90% of maximum. and slowed my X Y Z rotation axis feed rates down until the motors quit jumping steps. Most CNC home mills used to cut foam can't reach anywhere near the operational feeds and rapids rates possible with the commercial machines.
Here is a plug in the variables SFM calculator
Milling Formula Interactive Calculator
carbidedepot.com
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| Posted 3/31/2018 12:56:28 AM |
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Forum Member
Last Login: 12/6/2023 2:20:22 PM
Posts: 254,
Visits: 3,355
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| I can picture that hanging in my bar. Looks very cool
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| Posted 3/31/2018 12:21:54 PM |
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Supreme Being
Last Login: 4/6/2024 5:28:59 PM
Posts: 1,684,
Visits: 5,334
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Thanks for the info and link Vertigo. Those are the kind of things I'm learning about.  I have lowered motor settings in Mach 3 and that helped a lot but I haven't lowered feed rate, so I will try that. I have two programs that I am using to generate tool paths, Fusion 360 and Cut3d. Fusion is a great program and makes the cut much cleaner. Unfortunately you can only use a few file types to make tool paths and it is very difficult to even work with .stl files. Nice thing about Cut3d is that it will make a tool path out of almost and 3d file, but it's not as clean, has very limited tool path options, and it doesn't make as clean a finished product as Fusion. Plus it's not free. Supposedly Fusion can convert stl files into a form that it can use, but it has to reduce the mesh so much that the object is no longer recognizable.
Thanks for the kind words Bopenstein. I'd be glad to send you one, but you would have to pay for the shipping. 
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