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  • Rexipus commented on J-Max's instructable Bowden Belt Extruder2 years ago
    Bowden Belt Extruder

    J-Max,Thanks for your response! The Titan extruder has a 3:1 reduction ratio, which of course is even less than your 4:1 ratio, so if the short steppers work for that extruder, I would think it would work well for yours too. That being said, I recognize that you speak here with the voice of experience, and it would be foolish of me to think I know better just because something makes sense in my mind.I've therefore ordered a pair of 40mm steppers to use instead of the 20mm ones I'll be receiving tomorrow (I'll save those for future projects). I'll be very happy knowing that my extruders will work well with no question as to whether there's enough torque for any given situation they may face. I do in fact plan to use exotic filaments with carbon fiber, metal fillers, etc., and so I want t...

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    J-Max,Thanks for your response! The Titan extruder has a 3:1 reduction ratio, which of course is even less than your 4:1 ratio, so if the short steppers work for that extruder, I would think it would work well for yours too. That being said, I recognize that you speak here with the voice of experience, and it would be foolish of me to think I know better just because something makes sense in my mind.I've therefore ordered a pair of 40mm steppers to use instead of the 20mm ones I'll be receiving tomorrow (I'll save those for future projects). I'll be very happy knowing that my extruders will work well with no question as to whether there's enough torque for any given situation they may face. I do in fact plan to use exotic filaments with carbon fiber, metal fillers, etc., and so I want to make sure I've got the most sensible setup I can have.Thanks for your feedback!

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  • Rexipus commented on J-Max's instructable Bowden Belt Extruder2 years ago
    Bowden Belt Extruder

    J-Max, first of all, thanks for this design! I've seen a lot of extruders, and when I saw yours I decided I simply have to try it out, so I'm building two of them right now for a new dual-extrusion printer I'm building (a D-bot).My question: you mentioned that the stepper should be at least 37mm long. I didn't see this before I ordered my steppers, and I ordered short body steppers with around 20mm long bodies. I bought them because they were the same ones recommended for the E3D Titan geared extruder, on the basis that the gear reduction makes it unnecessary to have normal high torque steppers for the extruder.What's the basis for your recommendation of a minimum 37mm stepper size? Have you actually tried your extruder with a short body stepper?

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