Toolpath points

[kalunpaja]

Hi

I'm building a plasmacutting solution and bit by bit learning how to use Fusion 360 for making cutting programs. I already have managed to get good toolpaths for simple drawings but now I'm trying to make toolpaths for drawing that was originally picture. When zooming in it looks like this:

In curves there are two points very close to each other and my machine don't like them, and my machine can only work with straight lines. So my question is can I delete excessive points some how or can I determine what is the minimum distance between points? Or what would be the best solution?

Thank you in advance

-Kalle

[HarrisonClassic]

your machine cannot do arcs? G02, G03?

[kalunpaja]

Unfortunately it does not support any G codes, it is industrial 6 axis robot that is working with XYZ coordinates. I have to post coordinates to CSV format and then use those XYZ coorniates. It is not very accurate cutting machine in the first place so let's say that if there is points 2mm between each other in the arcs it is more than enough for me. It would be nice if that minimum distance between every point could be determined, but is it possible in any way?

[HarrisonClassic]

Have you tried altering the Tolerance values in the toolpath in the hope it creates few points but with enough accuracy still, or more points with distances that are still not too small?

[kalunpaja]

Yes I have tried both methods but for some reason Fusion wants to make every other point in the arc very very close to each other, the distance between those remains less than 0.1. Even if i put tolerance to 5mm it give very rough straight lines but still it keeps those two points closer than 0.1mm to each other.

[engineguy]

@kalunpaja 

Have you tried setting both the Tolerance and the Smoothing to say for example 2mm and see what that gives you ??

[kalunpaja]

Just tried but still it wants to keep those two point at the "corners".

[kalunpaja]

But hey, thank you all for trying to find solution😊

[seth.madore]

I may have missed it, but do you have a file you can share? Without the file, all we can do is guess

[kalunpaja]

I actually tried to attach also 3D model of a test piece I'm practising but now I realized it is not in my first message. And now I'm writing from another computer and there is not that file..

But I think I partly solved what is happening there. There were roll around cornes function on and it made a smoothing to all corners. Those "corners" were so small that the smoothing motion was only that about 0.05-0.1mm. When I selected "keep sharp edges" 95% of those close to each other points disappeared. I think I can live with those remaining 5% "double points" but still if someone have an idea how to control those toolpath points I would be happy to know.

[RoboTomo]

I am facing a similar problem. I want to export the machining program on to the robot, but because of the robot's minimal "blend radius" of 1 mm, the distance between points should be at least 3 mm, otherwise robot is skipping points. I tried to use different tool diameters but min. distance is still around 0.1-2 mm, I also tried tolerance and smoothing to 2 mm and then points are spaced from 0.6-40 mm. Is there any good method or option in Fusion360 to evenly space the points on the toolpath, mainly for "Flow" / "Steep and Shallow" machining strategy?

[seth.madore]

Would you be able to share your Fusion file here?
File > Export > Save to local folder, return to thread and attach the .f3d/.f3z file in your reply.

What post processor are you using?

Are you saying that you would like to force a distance between points to be about 3mm apart? Isn't that going to result in a very faceted toolpath and finish?

[RoboTomo]

Thank you for your response. I am transferring CAM project via RoboDK Add-in. Then in RoboDK I am using Universal Robots post processor which is also available in Fusion.

Yes that was my goal, but I have done some tests now and big increase of tolerence results in faceted toolpath, therefore the finish will not be ok, so you are right. I will have to find another way to run this path on the robot.

Anyways, I am posting my simple test workpiece, maybe with different settings it is still possible to achieve a good balance.