Tips & tricks for mounting a flying extruder



  • As of yesterday I have converted to a flying extruder setup on my Delta. It's working very well, although the mean error after delta calibration has increased from 0.025 tot 0.065. I will lower travel speed and increase the recovery time to see if that gets it back to lower values.

    I used 4mm diameter elastic band and the extruder is hangly fairly low, with very little tension on the elastic band. I only applied some tension to align the extruder output to the hotend. I can tighten the bands, but then the bowden will be a bit longer. I have seen that some use silicone tubing instead of elastic.

    Are there any tips & tricks on mouting a flying extruder setup?



  • I have NOT done the actual extruder... hope to do so soon... I HAVE "flown" my bowden and wiring several ways since building a large-ish delta.

    The way that worked best is to use "Stretch Magic" from the carriages. SM is intended for beading and similar:

    https://www.amazon.com/gp/product/B0058E7WOA/

    Amazing stuff. VERY resistant to breaking from overstretch. VERY light.



  • Thanks. I'll have a look at it. Yesterday I lowered probing travel speed and increased recovery time, and delta calibration results have improved to 0.03/0.04.



  • @bartolomeus I know I have seen a “keyback” used to put tension upwards on the extruder. In fact I think it was Haydn (the guy who sells awesome mag ball arms) that posted about that.



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  • @bpislife said in Tips & tricks for mounting a flying extruder:

    @bartolomeus I know I have seen a “keyback” used to put tension upwards on the extruder. In fact I think it was Haydn (the guy who sells awesome mag ball arms) that posted about that.

    Fantastic idea.

    A common problem with elastic is they give more pull when stretched. The linear pull of a "belt retractor" or "keyback" might work much better.

    Must try this, and soon!


  • administrators

    I use one to support the Bowden tube and cables, to prevent their weight applying a sideways force to the effector.


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