hi fellas, I want to make a barrel cam just like the video I am gonna upload but I can't, I've tried so much but every time there is a problem in it.
here is the file
Mahdi,.. I played with doing it and typically use surfaces as paths, in this case, I offset a face from the groove for the center and a point on the cam for the mate.
ah... would u plz upload the file for me? I need to examine it more closely
What version of SolidWorks are you using?
I was just wondering how I am supposed to make that groove on the surface of the cylindar? With sweep cut or wrap?
If it's sweep cut, how do I find the appropriate curve?
Excuse me Mahdi but are you a student?
yes I am a student. What difference does that make??
Dave, that link is of no use to the OP other than to add confusion to the problem.
This problem is far more complex than might be initially suspected.
Sorry J. Mather, but I wouldn't have thought so, but you definitely know better than I.
I was just trying to drop a hint rather than hand over the silver plate (you know how it works around here)
If this is a smooth (even) cut as it appears from the screen shot above, I would use a helix for the route of the swept cut.
That's what I was hinting at Jim.
Take a look at the example that Paul posted in bc_mstr_layout.sldprt and the example in this thread.
I now have a better/easier technique than this one that I wrote 9 years ago, but not sure when I will get a chance to attach my new technique.
Jim Steinmeyer wrote: If this is a smooth (even) cut as it appears from the screen shot above, I would use a helix for the route of the swept cut.
Jim Steinmeyer wrote:
Can you attach your example?
Here is how I would make the cut. I haven't tried it but you might be able to attach the point on the follower to the helix as well and save having to offset the face.
Sweeping a rectangle along a helix is not the same as sweeping a cylinder (end mill) along a helix to cut the slot.
I suspect there is probably a reason that Paul didn't present that "solution".
I think I didnt made it clear for u what I am supposed to do? I suggest u take a look at my first post in this discussion to see what I am after, But after all I think I have made it but there is a little problem with the motion
Mahdi Amirabadi wrote:... I suggest u take a look at my first post
Mahdi Amirabadi wrote:
... I suggest u take a look at my first post
I understood exactly what you wanted when I read your first post.
Can you ask your instructor to join this discussion.
Ah, I see now. I didn't understand what would be different so I replaced the bottom of the rectangle with a radius like using an end mill and it worked just fine. Then I took the time to watch the video and I see he needed it to loop so a helix would not bring it back. The screen shot led me to believe that the slot just went from one end to the other.
I stand corrected, the helix will not work for this problem.
my instructor? what do you mean by that?
One method of instruction is to present a general solution (or two) and then ask the student to use what was learned to solve a third related problem (in this case - your specific problem). Is your problem statement for someone to solve the problem for you - and present you with the final solution? If so, that can be done too.
Because you indicated that you are a student - I assumed that you had an instructor that might be able to contribute to this discussion.
I am an instructor myself.
This is similar to a cam latch mechanism I used earlier this year. I simplified the geometry to use as an example of how you can do this. On a side note it was made on a live axis lathe.
When it comes to surfaces I bow to Paul Salvador's expertise.
Hope it helps
is this a class room assignment?
Just read your tutorial and followed the thread you linked. WoW this is much more complicated than I envisioned. And considering the big guns that posted there with differing opinions I don't feel so bad about not seeing this correctly.
J. Mather, could you help me understand this better? When I envision this being cut I simplify it in my mind to hold the cutting tool stationary and rotate the work piece while pulling through the length. I know that the work piece would be stationary and a 4 or 5 axis mill would be used but for simplicity this helps me. Now as the tool goes through the material wouldn't it be perpendicular to the longitudinal axis at all times and this would create sides to the cut that are parallel to each other regardless of the bottom being square or rounded? Then if a helix were to be embossed on a wrap like you showed wouldn't it produce one side of the wave pattern as well?
I know this is a little off from the original post, but as he is a student it might help to understand the theory as well so things can be done correctly in the future.
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