this post was submitted on 15 Aug 2024
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One reason I love the 3D chameleon is that it is easily modified in how it operates.
I have mine doing color changes at 20 seconds! It shaves many hours off of some big 4 color prints
I always Purge to infill and if there is a lot of purge material in the block I will add an object that is printed using the Purge. Something that I don't mind being stripey
What annoys me and I don't entirely understand is the purge tower. If I purge to infill or another object, why am I still having to build this dumb tower? If you choose to disable the tower, it disables the purge to infill option.
If the infill is enough to take up the entire purge volume needed to get rid of the previous color, then you are right.
Most of the time there are sections where there is not enough infill to purge what it needs to though
Since it's not a good idea to extrude filament into open space, it has to build up a structure for that later Purge. That's why it seems to make a hollow pointless Purge Tower sometimes.
Another factor is the minimum Purge amount. I think that is set in the filament settings. By default it is not zero, meaning it will always create the tower no matter what, though it might be really skinny.
If you add objects that will be created from The Purge material you should see that Purge Tower get smaller when you reslice, or at least less dense