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solarbirdLast month, I wrote about PHA, an interesting and supposedly-easier-to-compost #3Dprinting material with heat tolerance notably higher than even HTPLA.
And last weekend, I finally got around to printing 170° and 175°C temperature tower elements. It took a while because I have to change nozzles and also generate new models and such, but I finally got to it. I was really hoping that maybe the spanning and threading improvement seen moving up the tower (which means down in temperature) would continue, and maybe we'd see some really clean spans.
Sadly...
...we did not. The spanning starts getting worse again below 180°, but for different reasons. This time, it's adhesion issues - it's too cool to stick to the cross-supports, so it doesn't. In short, the best point of these two curves is 180°C, and that's how you want to print it if you have parts fan on. (And if you don't, 220°C is best, but that's not as good as fan-on 180°C.)
All that said, I am looking forward to playing more with this material, because all the claims about a high glass point (just over 100°C!) held up in my testing. I've had real applications for this in the past, and I'm sure I will again.
First though I should probably print a small model and try staining it. I wonder how it'll stain up.
And last weekend, I finally got around to printing 170° and 175°C temperature tower elements. It took a while because I have to change nozzles and also generate new models and such, but I finally got to it. I was really hoping that maybe the spanning and threading improvement seen moving up the tower (which means down in temperature) would continue, and maybe we'd see some really clean spans.
Sadly...
...we did not. The spanning starts getting worse again below 180°, but for different reasons. This time, it's adhesion issues - it's too cool to stick to the cross-supports, so it doesn't. In short, the best point of these two curves is 180°C, and that's how you want to print it if you have parts fan on. (And if you don't, 220°C is best, but that's not as good as fan-on 180°C.)
All that said, I am looking forward to playing more with this material, because all the claims about a high glass point (just over 100°C!) held up in my testing. I've had real applications for this in the past, and I'm sure I will again.
First though I should probably print a small model and try staining it. I wonder how it'll stain up.
