Fusion360 Code/Simulation did not match to the X-Carve behavior (Z-Axis)

Hello everyone,
today I broke my bit.

I want to carve a small object (50mmx12mm) out of a 6mm thick aluminium.
I’ve created an object and the toolpaths in Fusion360.
I also used the Easel settings for aluminium.

The Fusion simulation look perfect, but this is not what the X-Carve does.

The material is 6mm thick, my model has a height of 4,5mm. So, the X-Carve should slowly remove this material. In 0,1mm steps.

But, for whatever reason, the X-Carve (Z-Axis) moved in one single step into the material. something like 1,5mm or even more.

In the past I cut some other object out of aluminium. Everything works fine. But there the material was 3mm and the model was 3mm.
Maybe I did here something wrong in Fusion with the 6mm/4,5mm?
Thanks for your help.

This is the model and the raw workpiece. Model 4,5mm and the raw workpiece 6mm.

Here you can see the Simulation and the first Z-coordinate.

Apologies that I don’t have an answer for you, but I’m sure someone here does. I’m commenting because I too am curious about this and have noticed the same behavior. It seems like everything I carve from fusion cuts too deep and I don’t see this on other software that I use.

if you still have it saved it would be best to share the toolpath settings also.
my guess would be something didn’t add up/set accordingly in the CAM

Hi,
yes I have it.
Thanks for your help.

Here is the g-Code.

First lines of code

G90G94
G17
G21

(TOOL/MILL,2,0,6.8,0)
(STOCK/BLOCK,12,50,6,0, 0, 0)
M9
T1M6
S16200M3
G54
M9
G0X6.15Y12.3
Z15
Z5
G1Z1.1F76.2
Z0.1
X6.177Z0
X6.25Z-0.073
X6.35Z-0.1
X6.55F127
X6.65Y12.327
X6.723Y12.4
X6.75Y12.5
X6.713Y12.732
X6.607Y12.941
X6.441Y13.107
X6.232Y13.213
X6Y13.25
X5.768Y13.213
X5.559Y13.107
X5.393Y12.941
X5.287Y12.732
X5.25Y12.5
X5.287Y12.268
X5.393Y12.059
X5.559Y11.893
X5.768Y11.787
X6Y11.75
X6.232Y11.787
X6.441Y11.893
X6.607Y12.059
X6.713Y12.268
X6.75Y12.5
X6.723Y12.6
X6.65Y12.673
X6.55Y12.7
X6.35
X6.25Z-0.073
X6.177Z0
X6.15Z0.1
G0Z5
Y12.3
G1Z1F76.2
Z0
X6.177Z-0.1
X6.25Z-0.173
X6.35Z-0.2
X6.55F127
X6.65Y12.327
X6.723Y12.4
X6.75Y12.5
X6.713Y12.732
X6.607Y12.941
X6.441Y13.107
X6.232Y13.213
X6Y13.25
X5.768Y13.213
X5.559Y13.107
X5.393Y12.941
X5.287Y12.732
X5.25Y12.5
X5.287Y12.268
X5.393Y12.059
X5.559Y11.893
X5.768Y11.787
X6Y11.75
X6.232Y11.787
X6.441Y11.893
X6.607Y12.059
X6.713Y12.268
X6.75Y12.5
X6.723Y12.6
X6.65Y12.673
X6.55Y12.7
X6.35
X6.25Z-0.173
X6.177Z-0.1
X6.15Z0
G0Z5
Y12.3
G1Z0.9F76.2
Z-0.1
X6.177Z-0.2
X6.25Z-0.273
X6.35Z-0.3
X6.55F127
X6.65Y12.327
X6.723Y12.4
X6.75Y12.5
X6.713Y12.732
X6.607Y12.941
X6.441Y13.107
X6.232Y13.213
X6Y13.25
X5.768Y13.213
X5.559Y13.107
X5.393Y12.941
X5.287Y12.732
X5.25Y12.5
X5.287Y12.268
X5.393Y12.059
X5.559Y11.893
X5.768Y11.787
X6Y11.75
X6.232Y11.787
X6.441Y11.893
X6.607Y12.059
X6.713Y12.268
X6.75Y12.5
X6.723Y12.6
X6.65Y12.673
X6.55Y12.7
X6.35
X6.25Z-0.273
X6.177Z-0.2
X6.15Z-0.1
G0Z5
Y12.3
G1Z0.8F76.2
Z-0.2
X6.177Z-0.3
X6.25Z-0.373
X6.35Z-0.4
X6.55F127
X6.65Y12.327
X6.723Y12.4
X6.75Y12.5
X6.713Y12.732
X6.607Y12.941
X6.441Y13.107
X6.232Y13.213
X6Y13.25
X5.768Y13.213
X5.559Y13.107
X5.393Y12.941
X5.287Y12.732
X5.25Y12.5
X5.287Y12.268
X5.393Y12.059
X5.559Y11.893
X5.768Y11.787
X6Y11.75
X6.232Y11.787
X6.441Y11.893
X6.607Y12.059
X6.713Y12.268
X6.75Y12.5
X6.723Y12.6
X6.65Y12.673
X6.55Y12.7
X6.35
X6.25Z-0.373
X6.177Z-0.3
X6.15Z-0.2
G0Z5
Y12.3
G1Z0.7F76.2

And here the settings for the first toolpath, which the X-Carve did wrong.

005

It doesn’t look like you’ve selected the “multiple depths” box. Without giving it a maximum roughing stepdown, it will assume that you want to cut the entire thing in one pass.

No sorry. The picture is not shown completely. I don’t know why.
But if you click on it you can see the whole image.
There I set the multiple depths to 0.1.
thx

Yeah that’s weird that it would do that even if it was checked for multiple depths. Are you using if you zeroed everything out then maybe it’s a bug. I have been using ugs now since easel has problems

It’s strange. I also have no idea or solution for it.
I will order some new bits and try it with UGS.

Did you run it in easel? From the gcode. I’ve been using ugs now since their update and also with having my jtech laser it’s just easier to go then that and v carve.

How are you zeroing your z axis? I don’t see a reason why that would happen. What sender are you using?

Hi,
I used in Fusion360 the easel cloud post processor and imported then the g-code in easel.
From there I started with the normal workflow.

I zeroing the z axis manually with a piece of paper and the control buttons in easel.

Did you zero from the top of the work piece or the wasteboard?

Under the main Setup-folder did you edit the stock material dimensions?
Default stock offset = 1mm meaning if you zero Z on stock the initial plunge will go 1mm too deep.

You can either edit Z offset = 0 or zero the Z of the material, lift Z 1mm and use that as Z zero.

I’m a little confused. From what I’m reading, you are having an issue with the holes? If that’s the case, you are running a 2D contour. It should be an adaptive clearing. Also try raising your safety hight. It’s a bit close.

I would use 2D adaptive for such an operation too.

1 Like

Thanks for your help.

@A_hartman90
I zero the z axis from top of the stock material.

@DennisSchell
The holes are one example from the wrong toolpath. Everything else went also wrong.
Thx for the info with the adaptive clearing. I will do that in the future.

@HaldorLonningdal
Interesting. Maybe this is the Problem.
Here is my setup.

009

011

@theguymasamato I originally thought the same as @HaldorLonningdal, but your gcode only shows the toolpath going to Z-0.1mm. Can you share the Fusion file?

@NeilFerreri1 yes of course.
What’s the best way to do that? Create a public link and share it or with an f3d-file?

Either way will work. I don’t know if you can attach a f3d, though.

Sorry for the delay.
Here it is:
pw: inventables

https://a360.co/2Lb2Kqv