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Milling issue with 3d milling

flowingestonia
Explorer

Milling issue with 3d milling

flowingestonia
Explorer
Explorer

Hi everyone

Sorry my english is very bad, but maybe somebody can help.

I have strange issue with my hobby cnc. I tried to 3d mill serving plate. First setup (adaptive clearing) worked well, but second setup 3d parallel starts good but suddenly it cuts trough my stock and deep to spoilboard (about 10mm). Bottom height is model height and simulation doesn’t show this issue. I checked all settings 4 times and tried again but it does everytime this. I add pictures from settings and small video also how it crashes. It seems that something resets zero middle of operation because before starting i reset zero to upper left stock corner. After it cuts through my stock and spoilboard i ask to return to zero, but it goes to same spot on xy-axes, but on z-axe it is about 10mm lower. I use Bulkman Ultimate workbee machine and UGS platform for controlling. 

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a.laasW8M6T
Mentor
Mentor

Looking at that vid I suspect you are losing steps on your Z axis due to too much tool load/too fast feed.

Without your Fusion .f3d file to look at I cant really say much more than that.

 

The Zmin for that tool is showing -31.407mm which I assume is the bottom of the model?

 

If you can upload your Fusion file we can have a look and see if its anything there

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flowingestonia
Explorer
Explorer

Hi :slightly_smiling_face:

Thanks for quick answer. Here is .f3d file attached :slightly_smiling_face:

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a.laasW8M6T
Mentor
Mentor

Ok so I believe the issue is due to your initial Adaptive leaving too much stock before the parallel passes.

The tool is then running hard into material which causes the Z axis to lose steps hence the problem you are seeing.

 

I have done a second setup with my suggested approach that should yield much better results.

First off, you should not try to contain the 3D adaptive with stock contours, this needs to be done with boundary selections

You will see with the boundary set correctly the adaptive now removes material correctly up to the edges of the part.

It now takes longer to machine but this time will be made up in the finishing passes.

You no longer need to use multiple step downs to finish so this saves much more time.

 

 

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flowingestonia
Explorer
Explorer

Hi :slightly_smiling_face:

  • Thanks. I tried with these settings, but did same thing. About after 10-20 seconds parallel cutting it goes crazy :slightly_smiling_face:
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HughesTooling
Consultant
Consultant

Does the controller support arcs on the XZ and YZ axis? I noticed you've turned off vertical lead radii in the adaptive operation but the parallel op will produce arcs on the vertical axis if you have smoothing enabled like you do.

 

Just checking, even with smoothing disabled you still get arcs on the ZX(G18) plane! 

HughesTooling_0-1651330732036.png

This looks like it might be where you get the problem. One easy test would be to set the pass angel to 45°, this way the only arcs you'll get are on the XY plane. Also please don't attach pictures, you can just paste direct from the clipboard or use the Insert Photo Option.

HughesTooling_1-1651331000691.png

 

Mark Hughes
Owner, Hughes Tooling
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flowingestonia
Explorer
Explorer

It still does these weird movements on 3dparallel, but i tried with 3d scallop and it worked. Thanks for help to everyone. I am just starting my cnc journey and i got some good tips from you :slightly_smiling_face:

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