Overlapping Barrel Cam

[twdrummer]

Hey guys, new to the forum here so forgive me for any nube mistakes. Anyway, I've been trying for a couple days now to model a barrel cam slot into a shaft which overlaps itself and returns back to its origin. I'm not sure of the best way to describe this but it's not just a simple cam slot which moves a cam a short distance, dwells, then moves the cam back, I actually need to move an outer roller(riding on this shaft) a long distance(several revolutions), then turn around and come back. The term for this motion I would describe as an oscillating motion. I've drawn my cam track on a plane tangent to my outer diameter, and wrapped to my desired depth. The weird part is, If I only draw half of my profile it will wrap fine, but when I try the entire path which reverses the direction of the slot, I keep getting intersecting errors. I tried only wrapping half of the profile and mirroring the feature also but again had no luck. Can anybody tell me what the heck I'm doing wrong here? Thanks in advance...Trent

 

[JohnRBaker]

Are you talking about a similar groove coming back over the first groove? If so, have you tried make two separate wrapped curve and two separate 'groove' features?

John R. Baker, P.E.
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[twdrummer]

Yes, I've tried two different wrapped curves. I mirrored my profile in the vertical y axis in a new sketch and tried wrapping that profile. It usually gives me an overlap error and won't finish the wrap function. I've attached another picture of what I really want my path to look like but Solidworks won't give me a correct part when I wrap and deboss my profile. I really don't undestand what is so difficult about what I'm trying to do?

 

[cowski]

Are you using Solidworks? If so, you should post your question in the Solidworks forum: forum559

If in fact you are using NX, I'd suggest that you create both wrap curve features before cutting material away from the cylinder. Otherwise, the 2nd wrap curve feature may see the discontinuity in the cylindrical surface and not give you want you want.

www.nxjournaling.com

 

[twdrummer]

thanks for clarifying I was in the wrong forum! I'll try reposting in the correct one...