Will the U1 do automatic flow rate and pressure advance calibration?

U1 Toolchanger
1

@snapmaker, you’ve put out a lot of info on the toohead changing features and benefits. That’s great - thanks. But please continue with more in-depth technical discussions. In particular, I’d like to know how you do flow rate and PA calibration. Your launch page states:

Fine-tuned Extrusion for Exquisite Details

U1 uses pressure advance to compensate for flow delays, reducing under- and over-extrusion for accurate prints with crisp details.

How are you doing this? Bambu did auto PA calibration with LIDAR for the X1C (not very well, IMHO) and with a synchronous extrusion motor and sensors on the H2D (which works great, also IMHO). I am a bit concerned since you don’t use the word “automatic.” Orca has had manual PA calibration tests for a long time now; I hope that is not what you are referring to. The auto filament calibration feature in the H2D works brilliantly, eliminating the need to manually calibrate filaments, which saves a LOT of time. I hope I don’t have to go back to manual calibration with the U1 - that would be a major disappointment.

The H2D does the flow rate calibration in the same way (it is one combined step with the PA calibration). Will the flow rate and pressure advance be automatically calibrated, or will that be a manual process?

Thanks.

2

Hi RD7,

check this out: U1 FAQ – Official Info Summary - #15 by Wombley

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3

Thanks. Somehow I missed that post :upside_down_face:

Is there an explanation anywhere of how the PA calibration is performed?

4

From a user perspective, it’s been shown in some reviews. You just choose that you want “flow” calibration at the start of your print, and it runs the routine for all tools prior to starting.

5

I have seen so many of these I’m losing track of what is covered where.:face_with_bags_under_eyes: I’ll go back and review again. Thanks.

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6

I mean, if that’s all you wanted to know, that’s all there really is to see, lol. You chose the option at print time on screen or in SM Orca when you send it. Then it does it.

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