Fusion too slow

[Anonymous]

Hi All

Just built a new PC for Fusion, Windows 10 64bit, 4Gb Video card, 16Gb main memory on an i7-7700 3.6Ghz and Fusion is terrible to work with on even basic tasks.

I created a DXF of a simple sign that I wanted to use Fusion to do the cam work on but the performance is abysmal. Trying to select a simple pocket to A 2D Adaptive on locks the machine up and the video goes silly and blacks out. Selecting the pocket just causes Fusion to stop responding for minutes at a time until it works things out, I haven't even got to doing the toolpath yet.

I will attach the file I am trying to work with and if anyone can see what may be causing it I would be appreciative. If there is nothing glaring I'll have to abandon Fusion and go with other software as I am a time restraint to get this very simple sign done.

Anyone out there know what might be happening?

OK can't figure out how to save the file to f3D so heres a public link instead (Fusion refuses to Export the file!)

http://a360.co/2HAmL8H

Cheers

[paul.clauss · Accepted solution]

Hi @Anonymous

Thanks for posting - I am sorry to hear you have been experiencing performance issues with Fusion 360.

I had a look at your file and noticed that the DXF file brought in only straight line segments - it linearized some of the arcs. I believe this is the cause of the performance issues you are experiencing, as it creates many faces in the geometry. When a toolpath is created, Fusion needs to chain all of these faces together - this is a large task due to the number of faces on the curves of the text in this model.

This is related to some of the DXF performance limitations described in this article, and directly relates to the issues described at this link.

This issue is usually due to the source program used to create the DXF. Which program did you use? Did it include any export options? Fusion uses R14 DXF files by default (and does not include options), perhaps saving the source file in this format will help allow the arcs to be drawn. You will also need to confirm that arcs are used in the original file, rather than polylines.

With a part like this, it may be easier to trace over the inserted DXF sketch in a new sketch that uses the proper arcs, rather than the many straight segments. Extruding this sketch will create a solid with cleaner faces and should eliminate the performance issues you are experiencing, if you cannot find a DXF export option that will use arcs in the source software.

I hope this helps! Please let me know if you have any questions - I am happy to assist.

[Anonymous]

Thanks Paul for working it out, I was hoping it was something simple rather than a true Fusion 360 problem.

Tonight when I get home I will see if I can fix the DXF in Autocad before bringing it back into Fusion. Failing that I will bring the DXF in as an image and recreate the sign by tracing.

Really appreciate the detailed explanation, made it easy to understand for this older bloke 🙂

Cheers