1. Got a question or need help troubleshooting? Post to the troubleshooting forum or Search the forums!

Solved *Read me*, EStep Calibration (FAQ)

Discussion in 'Troubleshooting' started by Ben R, Feb 25, 2015.

  1. Ben R

    Ben R Active Member

    Joined:
    Nov 21, 2014
    Messages:
    651
    Likes Received:
    89


    A Z step is the amount of steps (wiki stepper motors) it takes to raise the Z axis 1 mm. This is all mathy with the diameter of the rod and pitch of the screw (you have 8mm rods). The answer to Z steps is 2560 only. Unless you change rods.

    An E step is the amount of steps it takes to turn the hobbed bolt enough to move the filament 1 mm. That is NOT to extrude 1mm of filament. to move the solid unfettered 1.75mm cold filament 1mm. This number is like... 723 or something from factory. Having this out of whack will cause you to have trouble "overfilling" layers, splitting layers, clogging on the first layer, dragging, gooey nonsense, oversize parts etc.

    You can VIEW AND EDIT your steps in the EEPROM. This is for "fun" only. They will reset to firmware norms when you power off and on.

    You can find EEPROM viewer in most software front ends.

    To permanently modify E steps (again... do not modify Z steps, they are hard 2560) you need to modify the firmware in the arduino IDE.
    http://help.robo3dprinter.com/Wiki/RoBo_3D_Firmware

    to calculate your extrusion, you can do a LOT of trial and error.. or.. do some maths http://reprap.org/wiki/Triffid_Hunter's_Calibration_Guide
    there's a calculator out there that can math for you. Its got strange nomenclature though.

    The picture is of the line in the code that tells the machine what each axis uses for its steps. the last one is extruder steps.
     

    Attached Files:

    #1 Ben R, Feb 25, 2015
    Last edited by a moderator: Feb 25, 2015
    mjensen2k likes this.
  2. Mike Kelly

    Mike Kelly Volunteer

    Joined:
    Mar 11, 2013
    Messages:
    6,967
    Likes Received:
    2,276
    This is my go-to guide for it.

     
  3. Ben R

    Ben R Active Member

    Joined:
    Nov 21, 2014
    Messages:
    651
    Likes Received:
    89
    I added it up top as you were. I saw your recent post... hadn't seen that since awaiting my first printer.

    Was wondering where I learned it... none of the other pages seemed familiar.
     
  4. Magnumr

    Magnumr Member

    Joined:
    Sep 2, 2014
    Messages:
    40
    Likes Received:
    5
    what are the values for the imperial rods in the Kickstarter version of Robo 3d.. having hard time finding that info.. it is like now one is talking about the kickstarter edition any more.
     
  5. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
    Staff Member

    Joined:
    Feb 21, 2013
    Messages:
    23,477
    Likes Received:
    7,303
    For eSteps? Should be the same. The threaded rods are different, not really the extruder.

    I have one left with 5/8 rods.
     
  6. WheresWaldo

    WheresWaldo Volunteer ( ͠° ͟ʖ ͡°)
    Staff Member

    Joined:
    Feb 18, 2015
    Messages:
    5,905
    Likes Received:
    3,593
    @mark tomlinson, you should really do the lead screw upgrade to that last printer even if yuo have no apparent issues with X/Y resonance or Z banding. I would do it the way I outlined in the Mods forum since you will only be in it for about $25-30.
     
  7. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
    Staff Member

    Joined:
    Feb 21, 2013
    Messages:
    23,477
    Likes Received:
    7,303
    I know :) and I will at some point.
    That one printer is primarily used for rough-in work anyway, but it would not hurt to just do it.
     
  8. mjensen2k

    mjensen2k New Member

    Joined:
    Mar 29, 2016
    Messages:
    12
    Likes Received:
    7
    Just a little feedback from a newbie! This was excellent, first, thank you! My printer was underextruding out of the box. No problem. I make a few measurements, I average them, I do the calculation, I set it in Matter Control in the EEPROM and I retest and it puts out a TON of filament. Like my math was WAY off. I'm an engineer, math is something I'm pretty good at. I try again and again and it's confusing.

    I watched the video above and I found the GCode terminal and I did things from the terminal instead of the Matter Control and sure enough my calcs were pretty darn good. Something with the Matter Control was being wonky (technical term).

    I offer this in case it saves someone the hour that I just spent trying to figure it out!
     
    mark tomlinson likes this.
  9. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
    Staff Member

    Joined:
    Feb 21, 2013
    Messages:
    23,477
    Likes Received:
    7,303
    Situation normal.
     

Share This Page