» Topic: 4th Axis rotary Tool-path puzzle.
- October 15, 2013 at 3:32 am #15638
A very kind chap on cnczone helped out on the issue of rotary cuts below the rotary axis.
Although the somewhat cryptic Help entry gives no hint of this it’s the Base Point which needs to be set to define an axis within the part, paths can then be generated down to this Base Point. (Base Point isn’t even a point, it’s an alternate axis for the part parallel to the defined rotary axis.)
If your rotary axis is in X then use Y and Z to define an alternate axis parallel to the rotary axis and use this to generate paths for the problem section.
Parts with multiple sections where one axis will not suffice can be processed as several sections, each with it’s own appropriately set Base Point (It’s not a point it’s an axis).
For my S shaped part I needed 3 Base Points with the job split into sections along the axis, see image attached
Attachments:You must be logged in to view attached files.October 16, 2013 at 4:04 pm #15656
Thanks Nick that sorted things out. I have been following this on CNCzone too.
The help is a bit vague on these base lines.
CalumOctober 17, 2013 at 1:15 am #15657
Are you able to get roughing passes with as much surface height differences that you have?
I’m having trouble with differences of approx. .75 inch it will give me large rapids in to part to lower surfaces maybe you won’t get them if don’t have sharp drops.
RAFOctober 17, 2013 at 4:12 pm #15661
I’m not sure what you are getting at. What I have done is use multiple 4th axis rotary features with decreasing allowance, 20mm down to 1mm, then do a finish pass. I did this because the Multiple Passes option of the 4 axis rotary feature didn’t give the results I expected, might now that I understand the base line better. Is there another way to do roughing? Guess I could use 3d features and indexing, still have a lot to learn.
CalumOctober 18, 2013 at 5:14 pm #15677
Help entries describe parameters from poorly to entirely inadequately, it’s no wonder we’re struggling.December 26, 2014 at 1:55 am #20752
You must be logged in to reply to this topic.
- Newbie – computing for the first time – not working by Ancient Works1 week, 4 days ago
- Missing canned cycle parameters for Centurion 6 by RSB2 weeks, 5 days ago
- Missing arc moves in post by RSB2 weeks, 6 days ago
- Bobcad V23 4 axis arc issues by spach231 month ago
- Ball nose tools into tight corner features by Barrie1 month, 3 weeks ago