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hen918 - thanks for the kind words. Been designing/building this thing for about two years now.
Ok so... BIG update - first movement of the exes. Few problems on the way though, managed to kill one servo controller due to very high motor currents and oscillations. There ae few more problems for ironing out but it wooooorks .
a bit high. Without a finishing pass (... know, but I was in a hurry to mill something ) - 35mm diameter is milled 34.85mm. This is with old unknown tool and with spindle that is not centered. I guess with a finishing pass I will get closer to the final diameter (I suppose few hundreds are due to tool and frame deflection under the heavier cutting load). I am very pleased with the surface finish though. It is very flat to the touch.
Registered Member #135
Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
NICE!
What is your first major project going to be?
I just got my metal lathe a couple of months ago and I'm busy tooling that thing up for all kinds of projects.
If you need a really fine surface finish, you can fly cut. One tooth will provide a more even surface then two, and just take a half-mil pass and it will produce confetti, while leaving the surface very finely finished.
Thanks for the nice words and suggestions. Have to find/build a fly-cutter. We did a very fast test at cutting mild steel. With old 8mm tool at 0.7mm depth and 200mm feed seems to be doing really well
First project ... hmm already milled the housing for the spindle backlight
It turned out quite good. took about 1hour (including setup time, tool changes etc.) - good in my book - can't compare with professional machine . This would have been a full day job on my previous mill haa haa.
Registered Member #1749
Joined: Fri Oct 10 2008, 02:04AM
Location: Claremont New Hampshire
Posts: 497
Awesome work DR H looks allot better than my attempt to a 3D printer with servo's and induction heat. I wish I could do nice work like that especially since that kind of thing is my job.
Finally the mill is on its new work place. A lot of work went into properly aligning it and tuning the servos a bit more. The accuracy have greatly improved and in general works better than before
And here is the man who made this project possible - my father.
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Big Mama CNC Mill
.
) - 35mm diameter is milled 34.85mm. This is with old unknown tool and with spindle that is not centered. I guess with a finishing pass I will get closer to the final diameter (I suppose few hundreds are due to tool and frame deflection under the heavier cutting load). I am very pleased with the surface finish though. It is very flat to the touch. 
