Easy-to-follow video tutorials help you learn software, creative, and business skills.Become a member

Troubleshooting

From: Up and Running with RhinoCAM

Video: Troubleshooting

So when you've been working with CNC for a while, So I'll select my drive region that's already selected.

Troubleshooting

So when you've been working with CNC for a while, there's a couple of mistakes you see all the time. And you see them, you know, because you make them. So hopefully that can share with you some of the common troubleshooting steps that I take. And this can prevent you from wasting some of the time that I wasted. Okay so here we have a box of stock. It's about three inches deep. And I'd like to cut a hole in it all the way through that's in the shape of a plus sign like this. So let me show you what happens if we just jump in here, make a two axis path, and do profiling. And again I want to cut out the interior.

So I'll select my drive region that's already selected. I've already defined a flat mill tool. And for my cut parameters I want to, or rather levels, I want to cut all the way down through the three inches of my stock. And let's say, just because we're doing this quickly, that we do this in half-inch depth passes. So I'll hit Generate. And you'll see that by default, oops, I got those tool paths on the outside of my material. So, that often happens if you forget, down here in parameters, to set Use Inside and Outside for Closed Curves.

I'll make sure to click that, and click on Inside. So you'll notice that even when it's unchecked, it'll still just make the choice for you, but it not, might not be the one that you want. So hit Generate. And now while the cut is on the inside, we have this problem where we're not fully executing the cut. So the reason for this is that even though these slots are exactly half an inch and my bit is exactly half an inch, those two things don't go together in the real, real world, right? Have you ever tried to put exactly a half inch object into a half inch hole? Doesn't work. And the computer recognizes that. So in this particular case we're going to need to, if we want that hole to be exactly half an inch, pick a bit that's actually smaller than half an inch.

So I'll head in here to my flat mill, and edit this tool. And we can bump this tool diameter down to 0.25. Save Edits to Tool. I'll get a warning because it's an existing tool, but we know what we're doing. And you can also see a picture here of how much bit we have exposed outside the tool holder, and that will become important in a moment. So Save Edits to Tool. Okay. Generate. And then now that bit can fit on the inside of this containment area just fine. So everything looks okay, but here's another example of why simulation is so important.

Let's go ahead and simulate this. And you see that even know we get this cut in the middle, we have this strange red surface. And what the red surface tells us, is that the tool holder is actually making contact with the stock, once the tool gets low enough. And it's actually eating away at some of that material, so that red surface is a warning sign. So let's head back to our flat mill. And then here we can see that we have this much amount of material, this is the sort of cutting surface of the bit, and just a little bit of non cutting shank sticking out with the tool holder right here.

So if the bit allows for it, we should try to pull it out of the collet a little bit, say maybe to 3.125, so three and an eighths inches, again, assuming that our bit is long enough. So I have the same bit, but now that it's exposed a little bit more, we should be able to use it to get all the way down to the bottom of this cut without damaging the top of the surface. So, let's regenerate that path, still looks the same, but now if we simulate it, you'll see that we make that cut with no errors, also got this funky little piece in here; but that's so slim it'll probably just blow away as saw dust.

Okay, so finally, if you've been watching carefully as we've gone along. You'll see here in my simulation that the interior of my sharp corners are actually rounded over. Now in many cases that won't necessarily matter but if you're trying to make something, say, for inlay, or that requires a very careful fit, if your model has sharp corners in it, you want your result to have a sharp corner in it. So it's just plainly impossible to get an absolutely sharp corner if you're working with a cylindrical bit. You can get a really tiny bit so that, that roundover is very small.

But you'll never totally get rid of it. Now if you're trying to fit something in here, and all you care about is making sure that a square object can fit into this void. We'll do what some people call dog boning. Some people call bunny ears, I'll leave that up to you. So let's come in from the top and I'll temporary hide my stock. And now I'll make a circle, using my snaps will be useful in this case. So I'll make a circle right here, and I want this to be slightly larger than the diameter of my bit. We picked a quarter inch bit, so let's just make it something like 0.26.

We're just trying to make something that the bit can tuck into. Okay. I'm going to copy it over. I'm going to center over here. Now I can copy these two at the same time. Copy this fella here, here, here and here. So there's a couple of ways to do this. I can go ahead and get in here, and actually trim this out, so it's all one continuous area. Another way that I could do it, is just to make a separate profiling path. So let's just go ahead and trim it, because I think that looks kind of cool. So here are my cutting objects, the central area, and then I'll come around and cut all of these little interiors.

Enter to finish. And now we'll do it in reverse. So I select everything and then deselect the plus, so these are my cutting objects, and then my objects to cut are the insides of the cross. You can't see this happening because this is currently selected as a region for cutting. But bear with me, you'll see it's there. All right, now if we join this all together, that looks pretty good. You'll see up here it's joined into one closed curve. We might need to refresh our machining features, remove all, drive containment, like so.

And now when I hit generate, what we should get, is a little secondary drill pass that heads into each of these. And this will reveal itself it I refresh the stock and simulate it. Make the stock visual. Let's do that one more time. And there you go. So, if we want something to plug into these corners, now a sharp corner will fit into there. It will leave a little bit of a visual gap, so it just depends on the type of result you're trying to accomplish. Okay, so those are some common mistakes that I've made, so you don't have to.

Show transcript

This video is part of

Image for Up and Running with RhinoCAM
Up and Running with RhinoCAM

13 video lessons · 626 viewers

Taylor Hokanson
Author

 

Start learning today

Get unlimited access to all courses for just $25/month.

Become a member
Sometimes @lynda teaches me how to use a program and sometimes Lynda.com changes my life forever. @JosefShutter
@lynda lynda.com is an absolute life saver when it comes to learning todays software. Definitely recommend it! #higherlearning @Michael_Caraway
@lynda The best thing online! Your database of courses is great! To the mark and very helpful. Thanks! @ru22more
Got to create something yesterday I never thought I could do. #thanks @lynda @Ngventurella
I really do love @lynda as a learning platform. Never stop learning and developing, it’s probably our greatest gift as a species! @soundslikedavid
@lynda just subscribed to lynda.com all I can say its brilliant join now trust me @ButchSamurai
@lynda is an awesome resource. The membership is priceless if you take advantage of it. @diabetic_techie
One of the best decision I made this year. Buy a 1yr subscription to @lynda @cybercaptive
guys lynda.com (@lynda) is the best. So far I’ve learned Java, principles of OO programming, and now learning about MS project @lucasmitchell
Signed back up to @lynda dot com. I’ve missed it!! Proper geeking out right now! #timetolearn #geek @JayGodbold
Share a link to this course

What are exercise files?

Exercise files are the same files the author uses in the course. Save time by downloading the author's files instead of setting up your own files, and learn by following along with the instructor.

Can I take this course without the exercise files?

Yes! If you decide you would like the exercise files later, you can upgrade to a premium account any time.

Become a member Download sample files See plans and pricing

Please wait... please wait ...
Upgrade to get access to exercise files.

Exercise files video

How to use exercise files.

Learn by watching, listening, and doing, Exercise files are the same files the author uses in the course, so you can download them and follow along Premium memberships include access to all exercise files in the library.


Exercise files

Exercise files video

How to use exercise files.

For additional information on downloading and using exercise files, watch our instructional video or read the instructions in the FAQ.

This course includes free exercise files, so you can practice while you watch the course. To access all the exercise files in our library, become a Premium Member.

Join now "Already a member? Log in

Are you sure you want to mark all the videos in this course as unwatched?

This will not affect your course history, your reports, or your certificates of completion for this course.


Mark all as unwatched Cancel

Congratulations

You have completed Up and Running with RhinoCAM.

Return to your organization's learning portal to continue training, or close this page.


OK
Become a member to add this course to a playlist

Join today and get unlimited access to the entire library of video courses—and create as many playlists as you like.

Get started

Already a member?

Become a member to like this course.

Join today and get unlimited access to the entire library of video courses.

Get started

Already a member?

Exercise files

Learn by watching, listening, and doing! Exercise files are the same files the author uses in the course, so you can download them and follow along. Exercise files are available with all Premium memberships. Learn more

Get started

Already a Premium member?

Exercise files video

How to use exercise files.

Ask a question

Thanks for contacting us.
You’ll hear from our Customer Service team within 24 hours.

Please enter the text shown below:

The classic layout automatically defaults to the latest Flash Player.

To choose a different player, hold the cursor over your name at the top right of any lynda.com page and choose Site preferencesfrom the dropdown menu.

Continue to classic layout Stay on new layout
Exercise files

Access exercise files from a button right under the course name.

Mark videos as unwatched

Remove icons showing you already watched videos if you want to start over.

Control your viewing experience

Make the video wide, narrow, full-screen, or pop the player out of the page into its own window.

Interactive transcripts

Click on text in the transcript to jump to that spot in the video. As the video plays, the relevant spot in the transcript will be highlighted.

Are you sure you want to delete this note?

No

Your file was successfully uploaded.

Thanks for signing up.

We’ll send you a confirmation email shortly.


Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

Keep up with news, tips, and latest courses with emails from lynda.com.

Sign up and receive emails about lynda.com and our online training library:

Here’s our privacy policy with more details about how we handle your information.

   
submit Lightbox submit clicked
Terms and conditions of use

We've updated our terms and conditions (now called terms of service).Go
Review and accept our updated terms of service.