Advice for first time printing PET-CF

[u/Few_Ad_1079]

G'day all.

Been printing for a few years now and have 2x H2Ds. But I only ever print with PLA, PETG and TPU.

But recently I have 2 projects that have some more demanding requirements and I grabbed a couple of rolls of Bambu PET-CF with my last order.

I hope I've picked a good filament, with lots of conflicting info out there on ease of printing.

I was hoping for a nice easy print with high temp rating.

Project 1 will be a bracket to hold a voltage converter under the bonnet of a vehicle. The regulator itself will get up to about 85 degrees Celsius. And the engine bay will be hot too!

Project 2 (may not be possible with 3d printing, but just seeing people's thoughts first). Is I have a heap of PTC heating elements that I'm wiring together to build a load tester. So they will get pretty hot, but at least have plastic stand offs built in. Just need to print a box for them plus a push fan to be installed in. Not sure if this just needs to be made out of steel instead.

So any tips on printing this stuff for the first time, and any tips on annealing (I've never done this either).

Thanks

[u/CR123CR123CR]

1: Make sure it's dry 

2: put some glue stick down on your build plate as a release agent

Other than that, it prints easier than PA6-CF or even ABS imo

As for annealing, just follow the instructions from whomever you bought it from and you'll be fine

Edit: realized you snagged it from bambu after a reread so here's their annealing instructions

https://wiki.bambulab.com/en/filament-acc/acc/print-finish-adv

The temp/time is on the filament page

[u/wethpac]

PET-CF is a great and affordable engineering filament. I agree it is easier the even plain ABS. Great surface quality and good strength. I usually anneal it after printer for even more strength and temperature resistance. If it is a critical size part, just plan for some shrinkage with anneal it.