Big Chamfer

[Randy Morton @ Clem Industrial]

Hey all,

 

Working on an 18" diam. part and I have made a flat on the face (horizontal machine). Now I need to make a big bevel with my 5" x 45deg. facemill. The front of the stock is Z1.8 obviously down to Z0....

 

I did a search for this last night but could not come up with the results I wanted. Any help would be awesome.

[Psychomill]

Is this a large chamfer on the diameter? If so, how big?

[Randy Morton @ Clem Industrial]

Basically the depth of my facing cut is 1.8" deep from the front rad of the part (18" dia) x 45 deg. So, it's a fairly large bevel. And the bevel is technically not on the diameter, it's flat.

[Jack Neelands™]

you can cut it using depth of cut and click on tapered walls and input the angle

[Randy Morton @ Clem Industrial]

The problem that seems to be occuring with that is it creates a toolpath over the top of part, as per the picture below.

 

 

The pce with the X on it is the face that my horizontal will cut, and the angle above it is 45 deg. x 2.25 long (5" wide).

 

Again, maybe I am just unsure how to chain this properly or maybe it's just that I am not using the right TP.

 

Thanks for the help thus far!

[Jack Neelands™]

Can you put the file on the ftp site randy...or even a close facsimile of it ...

 

next request...can you put in on in Version X?

 

I only have the demo at home...boss wont let me take the sim as its being shared with the nightshift sometimes

[Thad]

Randy,

 

Will a 2D swept work?

 

Thad

[Randy Morton @ Clem Industrial]

I gave the swept a boo and didn't have much luck with it, Thad. I also have only used it on one occasion before with minimal success, so chances of me chaining incorrectly are pretty good.

 

Jack, I managed to bring home the key this weekend for just such an instance. I have been told we do a lot similar to this, so I really should try and find a good way to do it.

 

I have posted it on the ftp site in the MCX_MR2 or Earlier Files folder and named it MMBevel Test.MCX. I saved it in MCX version 1 just for you, Jack. =]

 

Thanks again!

[Jack Neelands™]

 

 

is this what you are looking for?

 

Demo---hahahahaha

 

 

if so than the tool /construction plane is from the front and the I picked a line that I created on the inside edge of the chamfer

you may need to change your curser to single to get this

my lead in is 5.0 with no sweep arc

depth of cuts .05

from the looks of it you have the room to do a multi pass of 3 @ 3.75 and do something like this by clicking contour instead of depth

 

 

 

Im not sure how well level 1 will take to this though

 

 

Ps ...thanks for regressing for me

 

[ 01-12-2007, 10:21 PM: Message edited by: Jack Neelands - Rho-Can Machine. ]

[Randy Morton @ Clem Industrial]

Jack, I don't really understand what you mean by no swept arc....but this is the result that I got from what I took from your example....

 

With the geometry that I had in level 2 hidden, I made it visible, then selected the line at the inside base of the chamfer. Selected contour, 5" x 45deg facemill, and DOC @ .15" (for this example) with tapered walls at 45 deg. It verified well, but left funny cut lines on the overlap like it was cutting deeper and not consistant on each DOC. Is this likely just a graphics thing?

 

Other then that it seems like it works just ducky.

[Randy Morton @ Clem Industrial]

Also, when it rapids back to the start point for the next cut it collides with the part and I can't seem to stop it from doing that....how can I correct this?

 

Thanks!

[Jack Neelands™]

I was referring to your lead in and lead out....arc is 0 so that you have a straight line

 

some times your verify can llok a little off ..if you set your graghics bar all the way to the right it should look a little better

 

your retract should be absolute and not incremental and set at approximately .25 above your highest point

 

Are you taking multi pass as well?

[Randy Morton @ Clem Industrial]

I have to take lots on the DOC based on the cutters that we use, but no on the multi passes.

 

One thing that does occur to me is that I would like to take 2 other cuts along that face with each stup down so that I can keep the cutter pressure equal. I tried creating 2 other lines down below the bevel base and chain those in with the the bevel only to run it and it not cut the bevel anymore.

 

Any idea how I can incorporate both into one toolpath?

 

Thanks!!!

[Randy Morton @ Clem Industrial]

Nevermind, I got it. Silly me.

 

Thanks so much for all the help, Jack (and others of course!)!!

[Jack Neelands™]

you found the finish cuts?

 

 

Glad we could help

[Randy Morton @ Clem Industrial]

I didn't actually do it with a finish pass, per say. Must have just been wonky last night when I tried with the multi line cuts thing, cause it worked this morning.

 

Second problem on the same lines; What if I wanted to do a similar thing except with a bevel (the same size) on the bottom and the top. Would DOC tapered walls still work?