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Basic 3D Help
« on: March 24, 2013, 04:08:15 PM »
Hi folks,
  I have a block that I wish to machine a "tapered to straight" radiussed groove into with a .050" ball endmill.
Attached is a basic 2 view dwg of one similar.

How do I go about creating a toolpath for Mach and my mill ?
I might figure it out with MeshCam, but first need a  "model, 3D drawing" or something ?

3D is a new one for me, any help welcomed.
Thanks,
Russ

Offline BR549

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Re: Basic 3D Help
« Reply #1 on: March 24, 2013, 05:54:53 PM »
Well I can suggest a 2 1/2d approach but I am not a very active user of 3d solid modelling and 3d CAM (real old school).

(;-) TP
Re: Basic 3D Help
« Reply #2 on: March 24, 2013, 06:41:33 PM »
 ???
Re: Basic 3D Help
« Reply #3 on: March 24, 2013, 06:54:43 PM »
 ???
Re: Basic 3D Help
« Reply #4 on: March 24, 2013, 07:07:57 PM »
Hi, Russ

Well, when it comes to 3-d I am a 1-DUH guy!

Guess my approach to this would be too simple and probably wrong, but looks like it would produce a tapered line starting at y0 z-.05, moving to y.75 with z moving up to -.0285 as it traverses (should give you a taper and the radius you want) then cutting the last .25 inches at -.0285.

I am assuming as you stated that you have the cube.  If not, then I am completely wrong (not unusual).

Bob@BobsShop

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Re: Basic 3D Help
« Reply #5 on: March 24, 2013, 07:26:38 PM »
Yous Guys are 2 fancy for me(;-) I did do a sample of 2.5d workl to show its use. I did it in MAch3 conversational(;-) Of course it needs to be adjusted for use.

Being all the angle changes are linear it would be a piece of cake for a Parametric SUB

(;-) TP
Re: Basic 3D Help
« Reply #6 on: March 24, 2013, 08:32:01 PM »
this might work for ya
Re: Basic 3D Help
« Reply #7 on: March 25, 2013, 07:15:29 AM »
Wow ... Thanks for the attention guys !
Hi Bob, you can more clearly see what I am wanting from the other replies, thanks for your input though as that is similar to what I thought at first. :)

TP, I may have several of these to do. I might hit you up for a Wizard for this parametric thingy, and/or a good tutorial, thanks !

YNN, Perfect ! Until I get the .05 cutter from Bits&Bits, I will run your file scaled up and use a .125 cutter that I have.
Rhino ... happy with it ? Is it CAD and CAM ?

Thanks again so much men,
Russ :)
Re: Basic 3D Help
« Reply #8 on: March 25, 2013, 08:06:23 AM »
BTW, the material is A2 or 0-1 tool steel.
 ?  Is it possible to do all of the cutting in the longitudinal direction ?
roughing it down, then shallow stepovers for the finish passes ?

Thanks guys,
Russ
Re: Basic 3D Help
« Reply #9 on: March 25, 2013, 08:18:09 AM »
Rhino and MadCam
took less than 30 minutes including drawing the 3d surface layer to drive the cutter path.
imported the dxf for the line endpoints.
I set the step over at .010" per pass.
Used a function button named, drive cutter path between two lines.
picked the two angled lines that were previously joined to the two straight lines.
then picked the two radius lines from the angled section
then the two radius lines on the straight section.
then arranged the layers in the way I wanted it to cut.
layer order is the sequence of operation.
move the order, change the cutting path sequence.
Fun programs to learn and very powerful.  8)

while I was composing this, you posted:
this is "post processed" as stated above in both directions as you want.
I assumed it was for tool steel.