Conversational problem.

[Powermax]

Hi all.

I am new this and have a cnc mill with Centroid M400 control.
I can't program yet without the conversational Centroid program.
I have a job making 100 parts that have a spherical hole on the inside and a spherical outside.

I have been looking on the web for quite a while but so far been unable to find a way to cut these profiles.

The machine can do thread milling so there must be a way to do the spherical hole.

Can anyone help with this one.


Thanks.

Bob

[lakeside]

do you have a solid .iges file if so post and I'll take a look

[Powermax]

Thanks Mike.

No .iges file just a drawing .dwf, .dxf or dxb.

What program uses .iges files?

Bob

[Powermax]

.dwg file, sorry

[lakeside]

I can open dwg e-mail with explanation of what your looking for,sent to mikelakeside@comcast.net

[Kiwi]

You could draw the arc and markout points along the arc at your stepover spacing.
Then write code using the XYZ points adding G02/G03 so the tool will do one revolution at each Z level. Also add a line G01 to move to the next Z point.
Something like this:

G90 G17 ;Absolute, XY Plane
G01 X21.6591 Y0 Z0
G03 X21.6591 Y0 I-21.6591 J0
G01 X21.4678 Y0 Z-0.4619
G03 X21.4678 Y0 I-21.4678 J0
G01 X21.2764 Y0 Z-0.9239
G03 X21.2764 Y0 I-21.2764 J0

If you supply the details: Diameters, Tool Dia. (Ball nose?), Step-Over. I will look at generating for you. (I have a Macro to generate code for tapered holes but with some modifications I think I can alter to do a sphere.)

[Powermax]

I have modified the drawing to be straight taper walls.

Can I e-mail the drawing?

[Kiwi]

Powermax.....Add the drawing as attachment.
Can send to me. aamcgreg@es.co.nz

[Kiwi]

Powermax.... Is this for a lathe or mill.

[Powermax]

Sorry.

Mill

Bob

[Kiwi]

Bob...I'm the one that should be sorry. I hadn't read your 1st post properly.
To make 100 this should be getting done on a lathe. The mill is good for the bolt holes, but the rest will take ages compared to a lathe.
To generate the code I need to know the tool diameter and if a ball nose?
(The code will be actual path, not G41/G42.)