DXF issue (Onshape -> Estlcam)

Software / Firmware
#1

Hi,
I’m trying to make some gears with ma MPCNC. But I can’t make a correct dxf to do that.
Look at the pictures, I often have this problem each time I try to have some ‘curves’ in my sketch. I don’t know if the problem comes from Onshape or Estlcam.
In Onshape, I tried all types of DXF (Release 14, 13, 12, 2000, 2004, etc…).
If I import back the exported DXF in Onshape, I’ve no error.
If I import the same DXF in Freecad, I’ve got something even stranger.

Has someone an idea about the problem I have? Is it Onshape or Estlcam which is the problem?
I searched several hours on internet to find an answer, but it doesn’t seem to be a famous problem.

Any idea is welcome, because I 'm stuck in the early beginning of a project…

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#2

I tried another way to make Gear in Onshape. The result is “artistic”…Pictures below…
:=/

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#3

I find a way (a real boring way…):
-Rotate the part in Onshape to be in the ‘Top Plane’.
-Export the part in IGES format
-Open the IGES in Freecad
-Export as DXF with Freecad
-Open it in Estlcam, it works now

So, the problem seems to come from Onshape. That’s sad, because I only use that now…
At least I can work again, but if somebody have another easier way, you’re welcome.

#4

I’ve got a response from Onshape Team:
Hi
Today we do not export spline data as splines but as poly lines in the DXF/DWG format. I have added you to the request for this type of support. ~Lou

Your support ticket:

“DXF export issues”

has been marked as an improvement request. Onshape development will evaluate the request and we will notify you if/when this has been implemented. Thank you for helping us make Onshape awesome!

If some people have the same problem, now you know there is a boring way to do it ;=)

#5

Please include me in this issue. I have the same desire and need to export spline data as splines. My primary use of Onshape was to model and work with gears.

#6

You have to do it from your Onshape account (even if it’s a free plan). More people ask for it, faster they will work on it.

#7

Hi,

can you send me the .dxf file so I can have a look at it?

Christian

#8

I send you a gear, but it’s the same with an half circle: if I draw my half circle clockwise it will work on estlcam, but anti-clowwise it’s not a the good place (or the opposite, I don’t remember). No problem with circles.

Copy-2-of-Part-Studio-4-Face.zip (14.3 KB)

#9

Hi,

I’ve just opened the file with LibreCAD and it shows the same issue.

Christian

#10

Has this been resolved yet? I just exported a dxf from Onshape to go to Estlecam and it is stepped instead of curved…

Have attached the Onshape sketch and the Estlecam output.

Rob
Screenshot 2022-08-14 122654
Screenshot 2022-08-14 121705

#11

Found the solution… smooth fillet corners need to be ticked

R