Uploaded DWG arcs will not create continuous line/face.

[Anonymous]

Hello

I have been supplied with a .DWG drawing of stations I need to turn into templates for cutting with CNC in 10mm MDF.

This link http://a360.co/2ehyk8X shows 6 stations on a rudder blade. The top station I have already added the material behind the curved face that is needed for the template. I cannot get A360 to recognise the series of arcs as a continuous curve. This means that I cannot press/pull the face into the 10mm template to be sent to CAM.

The designer who sent the file says it must be a problem with the software as this is a basic series of poly arcs I think he said. He asks if A360 runs on poly arcs (if I've got that right) or splines? 

Either way it's a very basic process so I can't help bit think it's me being a rookie.

Thanks for your help in advance.

Bill

P.s attached as file also incase link doesn't work

[Anonymous]

Secondly when the .DWG file is uploaded to A360 all the measurements are X10 of 1:1. so 3000mm measures as 30,000mm. Again my designer friend hsa checked this with Auto CAD and Rhino and they both measure 3000mm. Why would this be?

When I go to CAM it tells me I need a piece of plywood 16 x 40 metres to cut a template!

[HughesTooling]

Can you attach the DWG. In Rhino and AutoCAD if you set the units to mm and export Fusion will read the units correctly, the default from AutoCad is unitless. Don't know why but someone decided the default for unitless files uploaded is CM!

I've attached a file exported from Rhino as a DWG and it imports correctly, circles are circles and saved in mm and opens in Fusion in mm, 50mm square and 25mm circle.

Mark

[HughesTooling]

Forgot to ask what program you're exporting the DWGs from, if it's Rhino try the settings in this link.

http://forums.autodesk.com/t5/post-your-tips-and-tutorials/dwg-dxf-export-from-rhino-settings/td-p/6...

Mark

[Anonymous]

Hello Mark,

Attached is the original file from the yacht designer and secondly the file from my designer friend who stripped it down to just what I need while he was checking if he could find any problems.

I'm going home as it's the end of long day and I can look at little blues lines any longer. Thanks for your help and I'm sure I will be able to make sense of it in the morning.

[HughesTooling · Accepted solution]

Looking at your original file you are not going to get very good surfaces from it because it's all short line segments in polylines. I've made a screencast that shows the ends don't meet and the sections are made from hundreds of line segments.

If you're going to try and work from files like this your best bet will be to use the sketches and trace over them with splines in Fusion, I'll do another screencast to give you an idea.

Mark

[HughesTooling]

Here's an example tracing over one of your sketches. I don't use splines much so it's a bit slow going, doesn't help that there are so many lines and points. One tip while dragging the handles hold the Ctrl key down to stop Fusion from trying to add constraints, you'll want grid snapping off as well. I've attached a slightly cleaned up version of your DWG, it should open the correct size assuming the original was in mm.

 If you're interested in this method let me know as I've thought of a slightly better way using symmetry constraints.

Mark.