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Question about zig zag cutting in stl...

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derek minetti (Tig415)
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Username: Tig415

Post Number: 3
Registered: 09-2002
Posted on Saturday, December 28, 2002 - 02:42 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

Why is it that stlworks will generate code that cuts in a zig zag fashion for a while then for no apparent reason switch over to a less efficient lift Z axis to clear and start at beginning method ?
Is there any way to control this.

Thanks
Derek
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support (Support)
Moderator
Username: Support

Post Number: 383
Registered: 01-2002
Posted on Saturday, December 28, 2002 - 03:45 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Moderator/Admin Only) Ban Poster IP (Moderator/Admin only)

You may be cutting the "mountain" condition. As StlWork cuts multiple passes in Z, the top of the mountain gradually sticks out from the plane of cut. Rather than recut the surface of the mountain for each pass, StlWork will rapid the tool in an up-over-down pattern to avoid recutting surfaces that have already been roughed out. The total time for cutting is greatly reduced because rapids are used to avoid the recut surfaces.

This does not occur if you are taking a single pass to finish the mountain. In that case the cutter follows the surface throughout each zig and zag.

There is a setting in StlWork under Setup-Options-Options. It is called "Avoid cutting air during roughing". However, if you uncheck this dialog, your total machining time will be longer in most instances.

Fred Smith - IMService

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