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JEFFERSON169710REVISION2.dxf

Hello, this is my first post, hello from NY, America. I am using Megacad 2005 to program our Wema cnc lathes, and also create shop drawings for job approvals. I sometimes have issues when using the function " extend entities to a point." When using the tool on arcs, I sometimes get very large arcs that are not visible in the drawing, but are visible when I export a dxf to open in a CAM program. Sometimes these arcs are so problematic that I am notable to create a toolpath using them, and I need to delete them and  create separate 3 point arcs to replace them. This is not ideal because the arcs are not as smooth as using extend entity to a point. I have attached an example .PRT file, and also a screenshot image file. Thank you.

[Diese Nachricht wurde von Ian Giudilli am 08. Apr. 2022 editiert.]

[Diese Nachricht wurde von Ian Giudilli am 08. Apr. 2022 editiert.]

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Dear Ian,

somehow i cannot open your file, and its not a .prt.
I experienced that arc-issue earlier myself...

Maybe you check your files again

greetings, Ulrich

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MEGACAD_ARCEXPORT.pdf

I am having issues with exporting files properly, I converted the .PNG file that I created to view this issue to PDF, I hope it loads properly. I have succesfully exported as .PDF from VCARVE, you may need to use "fit to page" to view it properly

[Diese Nachricht wurde von Ian Giudilli am 10. Apr. 2022 editiert.]

[Diese Nachricht wurde von Ian Giudilli am 10. Apr. 2022 editiert.]

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hi,

could you not just post the original .prt?

G, Ulrich

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megacadarcissue_2005_extendentitytoapoint.zip

Hopefully this loads correctly

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extended.jpg

Hello,

yes it does.
Is "Extended to a point" the function shown in the attachment?

I experienced strange arc-fragments when i made a Dimetric from a round and cut 3D-body...

Which lines do you extend? If i extend the very large radius "wrong way around" (extending towards the opposite end of arc), then i get the large circles you showed in the pdf.

Somehow itŽs a pretty simple drawing, so I think if you do the drawing carefully and delete double lines that should work. Consider using Splines for the top part...actually it consists of four lines, maybe something is intersecting there.

Greetings, Ulrich

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I am extending from larger diameter in the center toward smaller diameter.

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