Impossible to machine lathed shapes

[Kosh]

Like the new site. Anyway, I've finally gotten the hang of the software and I'm using the Revolve function a lot, but there's something that troubles. I can design a shape in a 2D side view that is actually closed all the way around, with hollow space inside, Revolve it, and get it quoted. (it actually successfully checks the design and has no problems with it) But this is impossible because there's no way to machine internal features in a closed revolved shape. Like, imagine a hollow ball for example.

That's an extreme example... but I am working on a design that has narrow holes on two ends that I am highly skeptical of the ability to machine internal features from small holes like that. I'm just trying to figure out how far i can go. I don't want to submit a job that can't actually be done.

[Tech2]

You can add features that are not revolved by using the Mill machine in addition to the turned revolve feature. Furthermore, you can use the Comments To Machinist feature to do things that cannot directly be modeled.

[Kosh]

Thanks for the reply. I understand what you're saying. But my question is more about if I draw a design that cannot actually be fabricated, what happens? Like, what if the machine cannot reach to the inside of a cavity?

If an illustration or something would be helpful, let me know.

[Tech2]

I understand your point now. Although the software detects a large number of manufacturing issues it does not detect all cases. But orders are reviewed by the eMachineShop staff before production begins, so something like your example would be detected and you would be informed. It's kind of like airport controllers - a lot is computerized but you don't want put everything under software control.

[Kosh]

Ah, good to hear! Thanks. Then, I guess my next question is if it's possible to get a machinist to take a look at a file before I formally submit it, just to see if it's Kosher, so to speak. (I'm working on something for a run of probably 100, and so those fixes/changes will affect my pricing and I need to be sure of my final quote before I get them fabricated)

[Tech2]

The software catches most issues but if you need engineering assistance, please see Custom CAD Design Services.

[Kosh]

Thanks for the help!