So got my mill and have learned an awful lot.
My teens put it together with no trouble.
Did a first cut doing the āLongmillā text on a piece of leftover hardwood floor.
That was kinda cool. Hard maple, cut like butter. Nice.
I learned two really important things:
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I might be a hell-on-wheels old manual machinist, but I sure donāt know beans about CNC milling!
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You can generate usable tool paths easily; but efficient tool paths are quite a different story!
We have an old house that used to be an old folksā home with an insulated room with a chiller (my kids call it āthe Morgueā and I guess you never know). Weāre going to make it our tool room, so we made it a new sign:
Itās just a leftover chunk of 2x10 joist. Iām still trying to get my head around my toolchain. I did a model in FreeCAD using the Draft workbench, exported as STL. Imported into CamLab and pretty much used the default settings, knowing no better, and piped it over to UGS.
Iām sure a few things can be improved because that thing took 3 hours to carve! About halfway through I found that UGS lets you play with feeds on-the-fly, so I did that - at 24,000 RPM and 1600 feed rate (double the 800 I started with) the machine, router and carbide end mill were as happy as a pig in mud.
But that didnāt really speed it up. The toolpath seemed so random - buzzing over to rough out the top of the āBā, then the first āOā, then a little random pocket in the bottom left corner and the bottom pocket of the āBāā¦ Iām sure itās just a question of settings but wow.
Iām interested in ideas using canned cycles, and Iām thinking of taking my 3D models and splitting them up into a bunch of discreet STLs or somethingā¦ I donāt know, would be interesting to hear what others have done to speed the process up
Anyhow, the machine lives and itās definitely a success, and not a toy - I think weāre going to have a lot of fun with it.