Start and exit at center of Circle

[niwrad]

I want to start and exit at the center of a circle on contouring a counterbore. I saw how this is done before but I couldn't remember it. In lead in and lead out, someone posted the formula, length %, radius % and angle sweep.

I tried to draw and back figure it but I couldn't get it done. 

[#Rekd™]

Lots of good info here:

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[Guest]

There is a new end at center option in addition to start at center on the lead in out page, the sweep must be less than 180

[JParis]

Circle Mill & FTW!!

[Guest]

15 minutes ago, niwrad said:

I want to start and exit at the center of a circle on contouring a counterbore. I saw how this is done before but I couldn't remember it. In lead in and lead out, someone posted the formula, length %, radius % and angle sweep.

I tried to draw and back figure it but I couldn't get it done. 

(Hole Diameter - tool diameter)/2 the length set to perpendicular for contour sweep at 0 length

4 minutes ago, JParis said:

Circle Mill & FTW!!

I never liked that one much.it gave me such a hard time with chooks for the first year or so

[JParis]

8 minutes ago, byte me said:

I never liked that one much.it gave me such a hard time with chooks for the first year or so

It is very flexible....it's a rare day I use Contour to mill a ID diameter

[Guest]

1 minute ago, JParis said:

It is very flexible....it's a rare day I use Contour to mill a ID diameter

I generally use pocket, but the parameters are cast by the api, without that it would be a headache.. we actually even do our undercut with a pocket on finish pass with a lead in..

It would be really nice if pocket had a start at center option..

[Elmer Fudd]

49 minutes ago, niwrad said:

I want to start and exit at the center of a circle on contouring a counterbore. I saw how this is done before but I couldn't remember it. In lead in and lead out, someone posted the formula, length %, radius % and angle sweep.

I tried to draw and back figure it but I couldn't get it done. 

on your chains pick the arc center before the arc and then in lead in and lead out parameters select use enter/exit point.

[niwrad]

I haven't done CNC Mahining program for a while. I am so busy with Sheetmetal Programming that I just forgot this one certain thing. I usually do pocket or circle mill when programming and saw this in a forum, tried it and it works with overlap and arc sweep.

I am going through all my programs hoping I'll find at one.

[Leon82]

Chain a point in center then the diameter. In lead in check start point and exit point.

 

Or circlemill to make life easy

[cncappsjames]

I use circle mill nearly all the time. It's too easy. 

[gcode]

I 've said it a million times, but I sure wish circle mill could drive chamfer tools 

[Guest]

5 minutes ago, gcode said:

I 've said it a million times, but I sure wish circle mill could drive chamfer tools 

I've never heard you say that lol.

Would that be driven by a solid feature or a point or wireframe? All of them?

Chamfer Mill only or Radius Mill?

[gcode]

7 minutes ago, byte me said:

I've never heard you say that lol.

Would that be driven by a solid feature or a point or wireframe? All of them?

Chamfer Mill only or Radius Mill?

for drive geometry, all of the above

radius mill is already pretty easy 

I think just entering the pilot radius in stock to leave would do it

[Guest]

4 hours ago, gcode said:

for drive geometry, all of the above

radius mill is already pretty easy 

I think just entering the pilot radius in stock to leave would do it

Hopefully Aaron will see this and maybe think about adding this in a long with his new CHAINMilling!

[cncappsjames]

CHAINMilling FTW!

[John@WMM]

Depending on the depth i use:

Helix bore to rough

Circle mill with wear to finish

I've had my fair share of scrap using the lead in/out options on a contour 

[Leon82]

Slotmill is kind of like a circlemill for contours maybe