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2 ways would be, a) since you have to put those holes in, just run an end-mill around there while you're holding it to do the holes, or b) from both faces, use a corner rounding endmill and blend them together.
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I´d like to make some custom Arms for my rc car, but ive started thinking, and I dont quite get it, How to i make the OUTER edge round??
Look for the picture, marked in yellow.
PS: IM USING A MANUAL MILL
Tõnis Vanaselja
2 ways would be, a) since you have to put those holes in, just run an end-mill around there while you're holding it to do the holes, or b) from both faces, use a corner rounding endmill and blend them together.
Matt
San Diego, Ca
___ o o o_
[l_,[_____],
l---L - □lllllll□-
( )_) ( )_)--)_)
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
Sorry, I still dont get it, Can u please explain the first version again, or make some pictures? Id really appreciate it
As for the second version, i dont have any corner rounding mills, and id have to order it to get it. I really dont want to wait another month to make the part.
A corner rounding endmill is about your only option for cutting that on a manual mill. The setup required to cut those radii on a rotary table will make you prematurely grey
If you are in a hurry, and already have some kind of a flycutter holder that will hold a square lathe bit, you can grind a somewhat crude corner rounding cutter. If you don't think you have the skills or grinders for that, then try using a corner rounding router bit. These should be quite readily available at a lumber yard.
First you get good, then you get fast. Then grouchiness sets in.
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
Actually, drilling the holes will get you halfway to being gray.Originally Posted by HuFlungDung
A corner rounding endmill is about your only option for cutting that on a manual mill. The setup required to cut those radii on a rotary table will make you prematurely grey
If you are in a hurry, and already have some kind of a flycutter holder that will hold a square lathe bit, you can grind a somewhat crude corner rounding cutter. If you don't think you have the skills or grinders for that, then try using a corner rounding router bit. These should be quite readily available at a lumber yard.
As for rounding the edges, a machine known as "the ******can handmill" (ethnic reference deleted) -- also known as a file -- should do the job reasonably well.
Ken
Kenneth Lerman
55 Main Street
Newtown, CT 06470
You don't need a rotary table. Drill the holes first. Then place a vertical peg on your mill table it should fit in the drilled hole. Then hold the part and rotate it around the peg with the mill doing the work. Take fine cuts and do not climb mill!!!
Actually you could mount it on a rotary table, with a spacer between the forks for rigidity....then with several light cuts with an end mill you can round each fork...flip it over and round the other fork....anyway...I think you get the pic...I was always skeptical of that approach, but several people on HSM (the magazine) use that approach.
Reading and Comprehension is Key.PS: IM USING A MANUAL MILL
ESjaavik has a quick, somewhat clean method if a corner rounding EM isn't an option.
A belt sander can provide nice results when done carefully too.
Matt
San Diego, Ca
___ o o o_
[l_,[_____],
l---L - □lllllll□-
( )_) ( )_)--)_)
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)
What about this? Drill the holes in the part. Make a fixture (steel block) with a dowel the size of the hole sticking out. Put it in the vice. Put part with hole over dowel. Line it up to the endmill the correct distance from the endmill (the radius of the arc from the center of the hole) and, holding the part with vice grips, rotate the part on the dowel while the endmill cuts the radius.
Sorry, perhaps a bad explanation....
I wish it wouldn't crash.
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