Polycarbonate at 270-300 C on UM2+ (extrusion upgrade kit)?

[krys 206]

Hi folks,

I have recently upgraded my UM2 with the extrusion upgrade kit.

Something I have always wanted to do was to print in polycarbonate at higher temperatures. I have successfully done the Labern fan shroud in PC at 260 degrees and it works great (no warping), but for stronger parts I believe I need higher temperatures.

Others have done higher temperatures, but I want to confirm current knowledge/wisdom.

From my reading, the new TFM coupler is much better at high temperature, and I think the TinkerGnome firmware will let me set the nozzle temperature up to 300 degrees, so my questions are these:

1) Are my assumptions above correct?

2) Is TinkerGnome's firmware now stable and working with UM2+ (and upgrade kit)?

2) Should I also get an I2K, or is that no longer necessary?

3) If so, should I also get a shorter TFM so the spacer still works?

4) Would I need anything else?

5) Should I be concerned with anything else?

6) Any tips on getting PC to stick? (I used crazy glue on kapton tape and that worked sorta okay but still warped a bit.)

Any insights would be much appreciated. Thanks very much.

[neotko 1,417]

TFT can go 255C continuously, so yeah you need a I2K.

For a spacer you can print one 1mm shorter or the https://www.youmagine.com/designs/um2-adjustable-spring-replacement that it's adjustable.

That's all I can answer.

[krys 206]

TFT can go 255C continuously, so yeah you need a I2K.

For a spacer you can print one 1mm shorter or the https://www.youmagine.com/designs/um2-adjustable-spring-replacement that it's adjustable.

 

So, I2K yes and shorter spacer, not shorter TFM. Got it. Thanks very much!