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P3P Buffer tube max/min sensors no effect during print

I've noticed while printing that the Palette 3 Pro doesn't utilize the max/min sensors to control filament usage during a print, only during loading does it seem to control the extruder drives inside the p3p. This would be a handy feature to be able to have the min sensor pause a print so the palette can finish a splice and catch back up instead of having to manually watch it and hit pause every time.

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Hi @desirededge, thanks for getting in touch.

You should definitely not need to pause your print to allow the buffer to refill. When the min buffer switch is triggered more filament should be produced. If you do not see this, please could you take a video of the error and share with us, to help us diagnose the issue? You can use a file sharing service like Dropbox and send the link to support@mosaicmfg.com

You can also confirm that your min/max buffer switches are working in X-ray mode.

Let me know if you have any questions,
Guy

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@guyelston thanks for the reply, the switch works while initially loading the unit and feeding the extruder, my main issue is during the actual splicing action that sometimes the printer uses the remaining filament in the buffer tube and the splice is not completed yet. The printer will try and continue to pull filament when there's nothing available. I didn't know if maybe this was something to possibly look into being able to make the printer pause when this switch is contacted until the splice finalizes and extra material is available. I'll try and duplicate the situation and send it to you. Thanks again!

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Hi @desirededge, my pleasure - what's your print speed currently? A high print speed could cause this issue. Can you also confirm what length of outgoing tube you're using, and that this is the correct one entered on Palette under Printers> Select Printer > Edit calibration data ?

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@guyelston print speed is slowed down to 40 mm/s as I'm using a .8 nozzle as I planned on running into the issue of the splice not being completed before the buffer ran out. Prints are coming out good for the most part, occasionally it hiccups but I think that's more an issue with canvas, but that's a project for another day. As far as outgoing tube I'm using an 80 cm outgoing tube and everything's calibrated correctly. Mainly I was just wondering of a way to implement a printer pause in the firmware if the pallette runs out of buffer filament mid splice.

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@desirededge There's no way to implement a pause like you suggest, but you can try using our 'slow down while splicing feature': Slow Down While Splicing

With this you can significantly reduce the print speed while splicing, which should help your buffer keep up with the printer. You can try setting the speed to 10-20%.

If you still see issues, then you'll need to reduce your nozzle size. I think Palette is struggling to keep up with the high output of your large nozzle at the moment.

Let me know how you get on, and if you have any questions!

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@guyelston yea, slowing down the print speed to 50% during splices works 90% of the time, I just didn't know if there was maybe like an emergency pause that could be implemented short of manually pressing pause print on the screen. It only happens occasionally and I've been lucky enough to be present when it does it, I'd just hate to have a failed print or worse broken equipment if I'm not and it happens. Thanks for the help!

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@desirededge, my pleasure, let me know if I can be any help in the future. As I say, reducing the nozzle size would be another way to ensure that Palette can keep up with your extruder in this situation

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Author avatar Daniel Waldron will be eternally grateful.
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