Nice touch with the flat.I was going to try dropping the triangle down also.I did translate the triangle up last night and I could only go up a small way before it would not sweep.

Thank you for all the help.I only needed to do this for a model in a basic cnc course I teach.I am creating MC SOLID MODELS from an old blueprint.This has been great practice for me.

Ok, so here is where I am. I am not sure if maybe the triangle needs to be drawn in another plane. The threads are very squarish looking.Perhaps drawing the helix to the root diameter may help.

3rd thread.emcam

I did get it to work but the threads are more square at the crest of threads on the outside dia. So, I am getting closer. That is enough for today.

Hmm....I wonder what the diffierence is. I tried moving the triangle to see if that was the problem. Was  your helix at the minor dia of the thread and what position was your triangle at ?

No dice there either. Not sure what to try except  that I will open this file at work and try it there and hope that it is just HLE that is the problem.

Thanks  again for helping. I have done all this and from solids I click on sweep, first clicking on my triangle, then green check, then selecting the helix, again green check. I have to click on target body to be able to get the cut body to activate. I keep getting a warning that result of sweep would create an invalid solid.Is it possible that this will not work on HLE? 

attachment shows where I stalled.

bolt.emcam

REKd, did you cut along wireframe helix or did you do it along a solid?

Thanks for all the suggestions, I will get on this later and post result.

Here is a pdf drawing of what I want to thread.

handlebolt.pdf

That is one angle I had not thought of. This is a project that I use for a beginners cnc course that I run. It is a small machinist vice and the threads I want to produce are for a screw that runs through the body of the vice and connects the handle to the sliding jaw. I would like to draw a helix around the bolt and install it onto the body.handlebolt.emcam

Can anyone offer a newb some advice on showing threads on a shaft or internal threads in a hole? I would think a lot of folks would consider a waste of time and it is not something I want to do regularly, but would be useful to me on occasion.Any help is appreciated.Lifelong gcoder here, and am just learning mcam and would like to do this for some project models I am doing.

Tried it with both suggestions and both worked.Thanks much for the help.

Thanks for the replies.Will try both.I did keep updating a wireframe level but did not keep a solids level.

I am having trouble saving my solid models after drawing up from wireframe and using solid extrude. When I want to save as a file it will not regenerate  the complete model again.I am pretty new to this. How do I keep my wireframe complete using levels?