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klaus_kraemer

How to use support blocker???

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Posted · How to use support blocker???

I'm a little embarrased, as I really don't get how to work with the new support blocker feature! ?

 

Is there any manual or descriptio, how to use support blocker?

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Posted · How to use support blocker???

Hi and welcome,

 

Don't be embarrassed :)

 

I didn't try it yet in the new 3.3 cura but usually you would create a cube and place it where you don't want support to be generated (overlap the parts of the model with the anti-overhang mesh).

 

For it to work you of course need to activate supports for the regular model

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Posted · How to use support blocker???

I did a tutorial about this feature (as it was in older version already)

 

The workflow is a bit different but it should be usefull i think

 

 

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Posted (edited) · How to use support blocker???

Thanks for this, BUT: How do I create these blocks to use as a support blocker?

 

Please don't get mad at me, but I think documentation of CURA does not meet any standards as I cannot find any comprehensive manual, which is bad. Also adding new features to software simply calls for a clear description if you do not want users to think that you don't respect their lifetime they have to invest to understand the new feature without help from the manufacturer. As I am used to self learn, I have tried for some hours to find a solution - wasted hours stolen from my life and my familiy...

 

And as an afterthought wouldn't it be more user friendly to 'simply' enable the user to draw a support blocker layer in the layer view?

Edited by klaus_kraemer
Changed mesh view to layer view

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Posted · How to use support blocker???

With your object enabled, select the Support Eraser tool. Now click on an area of the object which you don't want to be supported.

A cube will appear on that part of the model. Using the regular translate and scale tools you can move that cube around if it did not end up in the expected area you clicked.

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Posted (edited) · How to use support blocker???

First time I got this ominous cube on the screen now. A little bit weird behaviour, sometimes it disappears again, when I klick on it, sometime I can move it around and resize it. Seems to be an elaborate feature, especially when you work around round or spheric shapes. I'll try more, before I complain...

 

Still in my imagination of workflow and accuracy I can only think of working on the layers to achieve accurate results...

Edited by klaus_kraemer
Typo...

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Posted · How to use support blocker???

With the Support Blocker tool selected, clicking a support blocker cube will remove it. With the Move tool selected, you can move it around.

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Posted · How to use support blocker???

Have to say Support Blocker is not very intuitive and usable.  Since Cura is generating the support structures, seems as if, at the very least, cura could list all the individual structures its has generated and one could pick through the various structures as it highlights them in the model and turn them on/off.  The cube thing is annoying and not very user friendly....one thing is once I create one cube for an area, I want to be able to elongate it on two other axis to block out support but can't do that with the scale function. Can't even copy that cube but have to to creating more cubes and scaling them as well...what a tedious pain! 

 

 

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Posted · How to use support blocker???
39 minutes ago, IvoPi said:

Since Cura is generating the support structures

 

Cura does not generate support structures, CuraEngine does. CuraEngine only returns layer data to Cura, so Cura does not know the geometric structures.

 

The current Support Blocker is a first version of the tool. If you do not like it, feel free not to use it for now. It will likely improve over the next versions.

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Posted · How to use support blocker???

Same issues with Support blocker. Do I have to make my own cube? IF not, how do I generate it? I need to make a ring to block support on the outer diameter that steps out from a smaller diameter.

 

Is there a slicer program out there, free or otherwise, that actually blocks support with instructions we humans can follow?

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Posted · How to use support blocker???
On 5/5/2018 at 9:24 PM, ahoeben said:

With your object enabled, select the Support Eraser tool. Now click on an area of the object which you don't want to be supported.

A cube will appear on that part of the model. Using the regular translate and scale tools you can move that cube around if it did not end up in the expected area you clicked.

 

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Posted · How to use support blocker???

Thanks ahoeben,

I am using version 3.3.1 and all I can find is the support blocker. Could you direct me the support eraser tool. Have looked in the online help documentation and elsewhere, but no luck finding it.

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Posted (edited) · How to use support blocker???

Just played around with the support blocker feature and think I understand now why people may have problems using it.

Indeed the handling is not very intuitive.

Why I must

a.) first select a model to activate the blocker tool, than

b.) select the blocker tool, than

c.) click on the model where the blocker should appear?

Any chance that the (IMHO unnecessary) step a.) could be avoided?

 

Edited by berndjm

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Posted · How to use support blocker???

If I am correct, Step A is required to limit the blocker to just the model in question and not have 'mis-clicks' that put it in places you may not want.

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Posted (edited) · How to use support blocker???

What about another (or second) approach by defining two-dimensional areas to define support blocking at a layer in the layer view? Blocking the space up in Z direction.

 

Edited by klaus_kraemer
Understanding...

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Posted (edited) · How to use support blocker???
7 minutes ago, kmanstudios said:

If I am correct, Step A is required to limit the blocker to just the model in question

Unfortunately, step A is required "because of how Cura is built". You will notice that all tools in the sidebar (except from the Open button, which is not actually in the toolbar) get disabled when there is no selection.

 

This can not be changed easily.

Edited by ahoeben
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Posted · How to use support blocker???

it would be sweet if you could drag the extent of the block from either end and drag it in that direction, instead you have to "scale" it which makes it grow or shrink on both or all planes... makes it hard to position accurately.

 

 

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Posted · How to use support blocker???

I was having some troubles getting support blocker to work as well (which led me to this forum). However, through some experimentation and following the directions here, I have some additional advice for those still having issues. To be as clear as possible, here are my steps to use support blocker (with bold instructions for things that I was having trouble understanding the most):

1) Click on your model to select the model for which you want to block some/all supports. (You must activate/select the model first, in order to activate tools on the sidebar.)

2) Click to select the "Support Blocker" tool on the sidebar
3) Click on the model in the area you want to block support. (You must click on the model itself, not just on the empty buildplate.)
4) With support blocker tool still selected on the sidebar, click the gray box that appears to select the "blocker object". (This will select/highlight the "blocker object" and deselect the object model.)
5) Click on the move tool on the sidebar to move the gray "blocker object" around. (This is done the same was as moving around the model, only now the blocker object is what will move).
6) Click on the scale tool on the sidebar to resize the "blocker object". (As above, this is the same process as scaling a model.) If you do not want to scale in all planes, uncheck the "Uniform Scaling" checkbox, and you can scale in only one direction.

 

Hopefully this is helpful to the next person to stumble across this forum looking for help using support blocker.

 

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Posted (edited) · How to use support blocker???

In Cura 3.6 (waiting for IT to install newest version), I carefully place and scale Support Blockers but they are not taken into account! It makes no difference in the build preview, there's support everywhere, through the Support Blockers as well.

Capture.PNG

Edited by mgibeault

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Posted · How to use support blocker???

Support blockers should be used to “mark” overhanging parts of a model to not receive supports underneith them. So the should ovetlap with part of the model, not with the supports.

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Posted · How to use support blocker???

From my experience, that section of support in the V is caused by horizontal expansion of the support on the outsides.

 

As I understand it, the expansion is useful to prevent the interface (top) layers, or more importantly the bottom layers being supported, from falling off the edge.

 

It seems that this expansion is not aware of being completely separated from the rest of the support when there is a feature needing support on one side of a wall and nothing on the other side. It seems CuraEngine expands the footprint and never looks back.

 

It might be possible to mark expanded support as tentative until it connects with something actually providing support. Probably would need a second pass after all layers have been sliced.

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