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I have a face selected but my toolpath completely ignores it. Any ideas why?
Solved! Go to Solution.
I have a face selected but my toolpath completely ignores it. Any ideas why?
Solved! Go to Solution.
You should be selecting the whole model you want to machine in the setup whether that's a single body or more. The model on the op where you've selected faces is meant for selecting patches to cover holes for just that op not for selecting just what you want to machine. You might get what you're after by going back to the setup selecting the model then unselect the 4 face in that op then reselect them under the Avoid\Touch surfaces section. Or you could try selecting a boundary around the surfaces.
So in setup select everything under Model. Why this is not at the top of the dialog I don't know as it's the most important selection.
Select a boundary, click the boundary curve again and you get an option to change the path.
Here I clicked one of the boundary lines and now have the option to change the boundary.
Or use touch surfaces.
Mark
Edit I would recommend using a boundary as you have more options for how the tool is confined like inside, centre or outside.
Mark Hughes
Owner, Hughes Tooling
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Mark, I'm not sure if I'm following you. I have my model selected in the setup.
In this case it's called 'Back - Outside." I'm then selecting Back Outside and using the drop down menu to select my operation
If I select "Include Setup Model" it creates a tool path for the entire model. What if I want to use a different tool on the cutaway portion of the back? I was under the impresssion I could just select the faces I wanted to cut? So, are you saying to do the reverse? Select "Include Setup Model" and then select only the faces you want to cut and choose "Touch Surface?"
I tried that and I still get the same result. It ignores that same small area.
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Leave model unselected in the Morphed Spiral op and I'd just use a boundary to contain the toolpath. If you want to select the surfaces use Avoid\Touch Surfaces and tick the touch tick box.
Notice in the image Model is not used at all and I've selected 10 surfaces I want to touch\machine.
As for the area that unmachined at the moment, have you got the Bottom Height set low enough.
Mark.
Mark Hughes
Owner, Hughes Tooling
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Here's an example where you'd use Model and Include Setup Model.
Say you have a part with a hole but you don't want the cutter going into the hole when finishing.
You'd go to the Patch Workspace and create a patch.
Then in your op You'd select the patch as the Model Surface and include the setup model.
If you don't select include setup model you risk something like this happening.
Mark
Edit, and this is what you get with include stock model. So be careful if you are selecting just the surfaces you want to machine as the model in an op because the op will not look at the set model.
Mark Hughes
Owner, Hughes Tooling
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Sorry, I'm kind of confused. So... what is a good rule of thumb? When would you not want to use Model and Include Setup Model?
For what you're doing you don't want to select the model in the op at all. The only time you'd select the model in the op is if you have holes in the part you don't want to machine, then you make patches to cover the holes and select just the patches and include setup model. What you are doing then is adding surfaces to the setup model to fill\cover the holes just for that op.
For the part you're doing now I'd make a boundary curve, you might have to make a sketch in the model workspace if you can't pick a boundary from the body.
Mark
Mark Hughes
Owner, Hughes Tooling
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The model selection in the operation is really intended as an override for the model defined in the job setup. Most of the time you shouldn't really need to use it. The purpose of defining the models in the setup (or in the individual operation) is to let the CAM system know which bodies/components it needs to be concerned with and which it can ignore. But note that this isn't just defining what areas can be machined, it's also defining what areas it needs to *avoid*. Any object included as a "model" in the job setup or operation will be avoided unless it is specifically included within the machining boudary. For defining the machining boudaries you use the "Geometry", "Slope", "Rest Machining", and "Avoid/Touch Surfaces" settings.
I rather like using touch surfaces for defining what to machine because many times it's easier to pick the surfaces directly than to pick an edge boundary. But this depends on the part. Sometimes an edge boundary is easier.
C|
Thanks Mark! I got it to work by leaving Model unselected and selecting Touch Surface and selecting my faces.