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CAD Question - Revolve Cut/Spiral Sweep issues

    
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Rank: 2

Mattyvdv

Assistant Engineer

posts: 60

Registered: 2012-7-8

Message 1 of 4

 CAD Question - Revolve Cut/Spiral Sweep issues
25-04-2013 06:03 . pm   |   View his/her posts only
Hello all,
Having a slight issue. I am trying to put a diamond pattern into a conveyor roll. I start by drawing the cuts i want to make on the end face of the roll, then i spiral sweep remove the cuts along the face, this works the way i want it to. Picture shows perfect results.

1st Revolve - Perfect

REVOLVE1.PNG
2013-4-25 17:55


Next, i use exactly the same tool (revolve sweep) exactly the same sketch except this time i check the "revolve clockwise" button to revolve this the other way. The preview looks like this is going to work perfectly. Picture shows the preview looks good.

Revolve preview

REVOLVE CUT PREVIEW.PNG
2013-4-25 17:55



The problem is, once i click OK i get mixed results. Some of the roll is perfect and some of it is missing the pattern. Picture shows results.

Results

RESULTS.PNG
2013-4-25 17:55



Does anyone know what might be causing this or can anyone offer a way around this?

Thanks in advance for any replies. :P

Rank: 7Rank: 7Rank: 7

Paul

Moderator

posts: 344

Registered: 2011-9-17

Message 2 of 4

26-04-2013 10:22 . am   |   View his/her posts only
Hi Matty,
there is an explanation for the fail it if I am reading your process correctly. The second spiral features cuts though so the original feature is no longer complete - e.g the forming faces have chunk/s cut out it. In truth ZW3 is probably doing a good job. (failed for me)
Try making the spirals as bodies, then pattern, then subtract from cylinder.
You should be able to use the thread tool.
Report back.
Cheers
Cheers

Rank: 2

Mark

Assistant Engineer

posts: 100

Registered: 2011-7-11

Message 3 of 4

26-04-2013 05:19 . pm   |   View his/her posts only
Make one spiral. Offset spiral end faces past cylinder each end. Mirror to geto opposite rotation. Rotate copy both. Subtract one way first. Then other way second.
Works for me every time.

Rank: 2

Mattyvdv

Assistant Engineer

posts: 60

Registered: 2012-7-8

Message 4 of 4

27-04-2013 06:26 . pm   |   View his/her posts only
Reply 3# theMIB
Thanks for helping guys. Worked perfect.
Capture.PNG
2013-4-27 18:26
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