issues with chamfering and converting files?

[Joe2up]

Hello all! Great site you have here, had a go at searching to see if this was a known issue or if anyone else had this but to no avail.

I'm currently doing an internship learning CAD and CAM with a mind to making components for bicycle frames though I'm guessing I may want to take it further than that when ready. Right now I have designed my piece in pro desktop and exported it as a STEP file. Upon opening it in onecnc and verifying dimensions there are a few initial errors- what should be surfaces parallel with z=0 plane are at an angle and a few other dimensions have shifted, not enough to worry about on a tolerance level but it seems to be enough for onecnc to refuse to make tool paths. The slight angle wouldn't be too much of a problem as i can make an absolute rectangle and move the top surface to it but then other parts are out.

It also seems to have issues with adding chamfers or fillets to complex shapes- creating odd shapes or refusing to do the operation, or worse- persistently crashing.

I accept that there is probably a fair amount of user error involved here, I've only been using the program for 3 days so please bear with me! I find it necessary to use another program to create the basic shapes as the interface on onecnc doesn't lend itself to parametrically creating complex shapes which can be editted on the fly.

Thanks in advance for any help

[Harri J]

Hi Joe,

I'd recommend joining the Onecnc user forum, tons of videos, posts and guys with years of experience.If you bought the software new, you have access to the forum and free support (Peter at UK support is great!). If not, I think you can join by paying a license transfer fee, best to check with support..
However, here are some quick pointers:

Importing: should work fine with stp. If the model's surface to be machined isn't flat in the XY-plane, rotate as needed or use the in car position buttons after setting up a plane. Machining boundaries need to be level, easiest way is to project them to any convenient z height (in a new layer maybe)
I've never had any problems with dimensions changing and I'd guess it's something else in this case.

Filleting: yes, it can be tricky. Make sure your surfaces are properly trimmed. There are some good posts in the support forum

Crashing: OneCNC is a little picky when it comes to hardware. Make sure you have the latest display drivers, this usually fixes crashing.

Welcome to the Onecnc gang, I'll be trolling around with others, happy to help whenever possible. To be of any real use, anyone helping you would need a file to look at/fix. Again, easiest through the forum, but you can also email me if you need help with a file.

Regards,
Harri
(XR4 Mill Expert)

[David Ferguson]

Please let us know what version of the software you are using. You should make sure you've updated to the latest version of XR3 or XR4 available at: http://onecncsupport.com/