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Fusion 360 complex sketch question

TorontoBuilder

TorontoBuilder

Ultra Member
Does anyone ever use complex sketch geometries in fusion 360 and have performance issues?

I seem to have issues when I use sketches with complex patterns and it has crashed my computer to a black screen of death....

Wondering if it is just me. I've updated my ram to 12 gb. duckduckgo has issues too... maybe they dont play well together
 
Can you post a screenshot of what you consider complex sketch geometries? I have never had fusion crash on either of my computers. One is at least 12 years old and the other is 3. New computer has 32 gb of ram old one has 8gb. Sounds like you may have a bad RAM stick.
 
Upnorth said:
Can you post a screenshot of what you consider complex sketch geometries? I have never had fusion crash on either of my computers. One is at least 12 years old and the other is 3. New computer has 32 gb of ram old one has 8gb. Sounds like you may have a bad RAM stick.
Click to expand...
Im trying to but fusion keeps crashing when I try to open recovery file
 
Upnorth said:
Can you post a screenshot of what you consider complex sketch geometries? I have never had fusion crash on either of my computers. One is at least 12 years old and the other is 3. New computer has 32 gb of ram old one has 8gb. Sounds like you may have a bad RAM stick.
Click to expand...
I found that I can make larger sketches but I cannot copy and hold a huge number of entities in the fusion "buffer" or else the program crashes. This screen shot below in made up of almost 8000 sketch entities. I had to copy two rows at a time and shorten the length of my rows to keep the entities under 1000 per execution

1728148803561.png
 
I have not done anything like that before. Sorry I don't think I can help with this one.

Edit: Is this just a large array of hexagons?
 
TorontoBuilder said:
Im trying to but fusion keeps crashing when I try to open recovery file
Click to expand...

I'm no Fusion Geek. But I know a thing or two about puters. Some memory sticks have parity bits to help identify errors and some don't. Also, many computers don't check parity even if it exists.

You could try removing memory sticks to force the program to cache to disk. It might slow things down but it might also help you identify a memory stick problem. Also, you can find utilities that will exercise your memory to find problems. The quick check on boot is not rigorous enough.

Lastly, it is possible that your saved file is corrupted. You might have to start over.
 
Doesn't Fusion have a command that arrays or patterns a single seed feature (your hex shape) along multiple axis (in your case X&Y) with a corresponding offset distance? Generally this method is less memory intensive because it only has a couple of relations to know for regen instead of many-many relations of many-many sticks. Alternately, there may be benefits to 3D extruding/cutting the hex as a single cell in the solid & then doing the pattern command, again in 3D (vs everything in sketch mode). Maybe F360 has diagnostic tools to indicate which method is better?
 
PeterT said:
Doesn't Fusion have a command that arrays or patterns a single seed feature (your hex shape) along multiple axis (in your case X&Y) with a corresponding offset distance? Generally this method is less memory intensive because it only has a couple of relations to know for regen instead of many-many relations of many-many sticks. Alternately, there may be benefits to 3D extruding/cutting the hex as a single cell in the solid & then doing the pattern command, again in 3D (vs everything in sketch mode). Maybe F360 has diagnostic tools to indicate which method is better?
Click to expand...
fusion patterns array as grids so I cant get alternating rows to be shifted leaving me to resort to copying single row shifted, and then to copy that new array multiple times to get the grind. It is clunky. Now I can not get it to emboss on the face I want... I am not sure where the sketch plane needs to be in relation to the face of the cylinder I need to emboss.

I'll figure it out in time
 
Select 2 rows of 1 hexagon each as the feature to pattern in 2 directions.

Or ask in the Autodesk Fusion360 forums.
 
Does Fusion have a modelling concept along the lines of 'blocks' whereby you fully define a shape, in your case the hex. Then you pattern that block name that with a different, higher level command that specifies spacing offset. Again, the idea is define it once but use it in different, potentially parametric ways. This allows even more power. You can have radial pattern. Or along a curve pattern. Or further specify does the pattern stay normal or does it rotate as a function of the curve shape. I'm sure this is all software dependent but even good old AutoCad used blocks.

For many CAD packages a thornier issue is when you have generated an extensive grid just fine, but you don't want certain occurrences like don't interfere over certain regions or intersect specific borders or specify allowances. Sure, you can manually delete certain ones to suite. Then circumstances change, the hex or web is now a different dimension, back to the drawing board.

Just curious - are you going to be sending this out for CNC cutting? I encountered an issue many moons ago where the CAD package was just fine, but the segment count/complexity hit some limit on the (in that case 2D toolpath) app. I guess they would tell you that up front though.
 
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