Steps/mm

Discussion in 'Titan' started by sigxcpu, Jun 14, 2016.

  1. sigxcpu

    sigxcpu Member

    Joined:
    Jun 14, 2016
    Messages:
    2
    Likes Received:
    2
    I have the "standard" 16 microsteps extruder driver, so the formula for steps/mm should result in 456. Tried this (with no hotend) and 100mm asked resulted in 112mm extruded. Adjusted to 407 steps/mm.

    Attempting to understand the cause led me to this: The boring in the hobbed gear is not flat, therefore it is important to have the filament as centered as possible, otherwise the radius of the hobbed gear is changed (hopefully not during printing) and the steps/mm is changed too. The reason for not centered filament seems to be the black (1.75mm) guide that tries to put it off-center.

    I've attached a picture that clearly shows the filament "liking" the bigger radius of the hobbed gear.
     

    Attached Files:

    moe9584 likes this.
  2. mike01hu

    mike01hu Well-Known Member

    Joined:
    Apr 22, 2014
    Messages:
    957
    Likes Received:
    166
    What is it like with the Bowden tube in place?
     
  3. Alex9779

    Alex9779 Moderator
    Staff Member

    Joined:
    Sep 4, 2015
    Messages:
    2,405
    Likes Received:
    731
  4. sigxcpu

    sigxcpu Member

    Joined:
    Jun 14, 2016
    Messages:
    2
    Likes Received:
    2
    Heh, I've went from assembly to steps/mm in that article. Missed the gears alignment (fixed yesteday) and the PTFE tube in the lever. I'll do it and report back.

    LE: Yeap! Thanks for pointing me on the right track.

    @mike01hu: if by "bowden tubein place " you were referring to the lever side, you were too vague for me to understand :)
     
    #4 sigxcpu, Jun 14, 2016
    Last edited: Jun 14, 2016
    PsyVision likes this.

Share This Page