Question about psssible modifyication of the Hemera stepper

Discussion in 'Tool heads & ToolChanger' started by W1EBR.Gene, Feb 21, 2020.

  1. W1EBR.Gene

    W1EBR.Gene Well-Known Member

    Joined:
    Apr 10, 2016
    Messages:
    298
    Likes Received:
    40
    @Greg Holloway , is the Hemera stepper motor a basic Nema17 stepper motor with custom endplates and a custom drive gear? If yes, then using a shorter Nema17 stepper motor (body and rotor) and replacing its' endplates with those from a Hemera stepper might be a way to make a lighter version of a Hemera.

    Also, is the drive gear press fit onto the drive shaft or held in place with a grub screw? Cutting the drive shaft on a standard Nema17 motor shouldn't be too difficult.

    Would this work? Just curious :)

    Gene
     
    #1 W1EBR.Gene, Feb 21, 2020
    Last edited: Feb 21, 2020
  2. Greg_The_Maker

    Greg_The_Maker Administrator
    Staff Member

    Joined:
    Sep 4, 2015
    Messages:
    1,035
    Likes Received:
    632

    Hi,

    I'm not a part of the Hemera dev team so I can't really comment on the technicallities with any authority. it is a nema 17 based system, I wouldn't describe it as basic though. you can use any size motor you like, just remember with a smaller motor you get less power. There are no grubscrews.
     
  3. W1EBR.Gene

    W1EBR.Gene Well-Known Member

    Joined:
    Apr 10, 2016
    Messages:
    298
    Likes Received:
    40
    I was thinking of a way to lighten the extruder for use in the toolchanger. I took apart a stepper and was surprised at how modular and straightforward they are to repair.
     
  4. Nibbels

    Nibbels Well-Known Member

    Joined:
    Dec 12, 2019
    Messages:
    165
    Likes Received:
    32
    I had the same idea.

    But for practical use I switched both of the TitanAeros from slimline back to the default motor.
    The reason was that some filaments are not quite happy with less force. And I wanted to have a more efficient force generation in terms of heat production. (You wont have this heat problem so much as I because the hemera is one piece and the cooler sits in front of it.)

    The difference you might gain is 70g. That is around 14% of the tool and less % if you calculate the coupler into that calculation. After a PETG print failure I figured that for me the 70g are not worth the risk of figuring out why the print broke.
    Maybe I come back to the pancake after oiling my hotends of if I start printing flex.
     

Share This Page