Compound Angle

[cqualls]

I've put a file on the FTP named CQ_REAR_COVER ftp://www.mastercam-cadcam.com/Mastercam_forum/X4_Files/

I'm going to put the 16mm hole in on a compound angle using a Horizontal 4 axis Machining center, and a Tilt table.

I laid the hole out, with a scribe, on the part tilted the table to 32.2875 and rotated the machine to 20.483

Set up off of the tooling ball and moved X-2.9737 and Y 2.0145 and it doesn't come out Right.

Question is: What angle should the tilt table be tilted to, What angle should the table be rotated to, What distance should I move off of the tooling ball in x & Y.

[JDowe]

setting the part so the hole surface is in the top plane with 0 on the bottom of the part

Ball dia = .75

x 2.2813 y.9117

c -20.483 b -57.713

these are the posted values using 5 axis drill

parallel to a line through the center of the hole - origin set to tooling ball center

[John Summers]

You need to explain more about your rotary and tilt tables. The problem here is that you the part needs to tilt about an axis which is not parallel to a part edge, so it will have to be clamped at the 20.483 angle on the tilt table. I'll add more once I find out what kind of a tilt table you have.

[cqualls]

Thanks for the replies. JDowe I will check the numbers in the morning and see if the work out for me.

 

The tilt table is just a manual table that we set up with a 5" sine plate and indicator.

Set the table at 32.875 degrees and clamped the part on it. Then put the whole table on the machine and clamped it down and rotated the fourth axis on the machine.

[John Summers]

I'm sending you a part that shows the rotations. The final machining view is TOP. I rotated the part instead of views. I think it makes the action clearer. Before you start, create a point at the center of the tooling ball. You'll need it after you get the part rotated. You don't need any particular machining origin, because the hole is only relative to the ball. But if you make the ball center the machining origin, the offset to the hole is easier. I hope you can leave some stock so you don't have to start the hole on an angled surface.

[cqualls]

Where did you send the file to?

Thanks for the help.

[cqualls]

Got the file. Once again thanks for the help.

[cqualls]

Once again I want to thank John for his help.

We had to rotate the part on the Tilt table instead of rotating the table on the horizontal machine to get this to work out.