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Keep your PVA as dry as possible. Don't leave it on the machine when not printing. Keep it with lots of dessicant in a sealed bag (I use 2 gallon zip locks and large amounts of dessicant).
Anyway according to that chart you can try "breakaway". But if breakaway works I'd consider trying PLA.
I've never tried support with TPU.
I would assume the materials will not stick at all. So you can probably use PLA as the support material but realize that the PLA probably will not ever print on top of the TPU and the TPU must be connected to itself to print on top of PLA. So for example if you are printing a table, then the PLA can easily support the main structure of the table because it can "bridge" and grip the legs. But if you are printing a model of a man with his hands pointing down to his toes - when you get to time to print the finger - the TPU on top of the PLA support it just won't stick at all and will fail. In other words you can print overhangs and bridges but not things "in thin air" supported only by support material.
Anyway I've never tried support with TPU so I could be wrong about a lot of this.
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We don't often release an alpha version of Ultimaker Cura... So what's different this time? This Alpha contains such a huge slicing engine overhaul that we really need your help!
We wish to celebrate and honor the innovators that push forward the field, technology and world. We opted to not present it as a competition or ranked list. Every innovator has earned his spot on that list in their own way. We also look at the 3D printing industry as a whole and not limit the list to those only using Ultimaker.
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According to this chart - it's not necessarily going to work:
https://support.ultimaker.com/hc/en-us/articles/360011543699-Ultimaker-S5-Material-compatibility
Keep your PVA as dry as possible. Don't leave it on the machine when not printing. Keep it with lots of dessicant in a sealed bag (I use 2 gallon zip locks and large amounts of dessicant).
Anyway according to that chart you can try "breakaway". But if breakaway works I'd consider trying PLA.
I've never tried support with TPU.
I would assume the materials will not stick at all. So you can probably use PLA as the support material but realize that the PLA probably will not ever print on top of the TPU and the TPU must be connected to itself to print on top of PLA. So for example if you are printing a table, then the PLA can easily support the main structure of the table because it can "bridge" and grip the legs. But if you are printing a model of a man with his hands pointing down to his toes - when you get to time to print the finger - the TPU on top of the PLA support it just won't stick at all and will fail. In other words you can print overhangs and bridges but not things "in thin air" supported only by support material.
Anyway I've never tried support with TPU so I could be wrong about a lot of this.
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