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First splice consistently fails.

I am trying to print something in PETG and TPU. I have done splice calibration and determined values that work for petg->tpu and different values for tpu->petg. They work consistently when using the local splice setting feature on the palette 2S.

I input the values in canvas for my project, sliced and sent to the printer. The first splice always fails. It looks like nothing or close to nothing is actually done during the process.. both petg and tpu ends look just cut.

I opened the canvas generated gcode in notepad and noticed that I can't find the splice settings anywhere (in the commented definition of the 4 extruders beating, cooling, and compression are all defined at 0 and the material names are just “material 1”, “material 2” etc.. the print settings overrides seem to be applying though.

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Answering my own question here.. turning off Endurance mode seems to have made a difference.. it’s very likely that my print will still fail as the splices seem still weaker than they were during the calibration process, but we’ll see..

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2 Answers

Hey @anmael, thanks for reaching out about this. While Palette can splice TPU <-> TPU and PETG <-> PETG, it is very difficult to splice TPU <-> PETG due to the difference in rigidity between these materials. These combinations are very challenging to be printed reliably by most printers, and are not officially supported by Palette 2. Please check out this article on flexibles for more information.

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The problem is not that the splices are not solid.. when I use the splice tuning feature on the palette, I found the right numbers (2/4/-2 petg->tpu and 1/1/-1 tpu->petg).. these numbers work consistently in splice tuning.

However, when I start a print sliced in canvas, the first splice completely ignores these numbers and the PETG looks that it did not even get heat up.. the subsequent splices are perfectly fine and stay connected without effort.

The very first splice is the problem :/

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Thanks for clarifying - could you share your Canvas project with us here (instructions: mm3d.co/canvas-sharing)? Please make sure to share the model, printer profile, material profile, and splice settings. We will take a look on our end. In addition, have you noticed if the splice core lights up during the first splice? The light will indicate that heat/compression/cooling is being applied to the splice.

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Tommaso Ciofi will be eternally grateful.
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