Dual Extrusion Centering Anchors

by IronFace, published

Dual Extrusion Centering Anchors by IronFace Aug 19, 2012

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I've been playing with Dual Extrusion on my Replicator a lot lately. and I realized I needed something that will be consistently placed as a reference point during the process of combining STL files.


Each anchor has a second stacked on top of it.

Add this geometry to your STL files.
Select the anchors that are closest to the outside of your largest object. And delete the rest.

Add the bottom anchor of the stack to your Left Extruder object, and the top to your Right Extruder object.

Now when you combine the objects it should align them with little fuss.

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Sorry, but I don't understand what this is used for.

Does forcing a shared bounding-box between the two STL's have some benefit when generating the dual-extrusion GCODE? (I've had mixed luck with dual extrusion, so I'm actually curious)

Or are you saying this helps when aligning the models for preview in an editor like Blender?

Thanks for the question! Yes, I've had terrible luck with centering objects after I've exported them to STL. I use Lightwave as a modeling engine, which rotates the object after the geometry is tripled. By creating a bounding box around the object, replicatorg will center it based on that box.

The coaster I created has a non-symmetric object in it which doesn't center correctly. In order to fix this, I had to create a ring around the object layer so it would mesh correctly, this wasn't in my initial plan.(But it actually looks better now that I've gotten used to it.)

Hope that answers your question.