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

Solved Z-Axis Waaaaay off!

Discussion in 'Troubleshooting' started by woofguy, Aug 28, 2016.

Thread Status:
Not open for further replies.
  1. woofguy

    woofguy New Member

    Joined:
    Jul 31, 2016
    Messages:
    10
    Likes Received:
    1
    so i just installed the E3D V6 and a titan extruder in my R1+.
    everything went well, except got the firmware from the forum edited and uploaded.
    strange issue now with z-axis. if i send a G1 Z40.000, it moves up about 120mm. WTF!?
    0.1 and up to 10mm commands appear to work ok. it homes ok too. i sent a Z100 and im not joking, it went up and off the rails!!!!!!!! any idea why this is happening?
    X and Y seem to work just fine btw.
    im not good with firmware, so any help would be greatly appreciated!
     
    #1 woofguy, Aug 28, 2016
  2. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
    Staff Member

    Joined:
    Feb 21, 2013
    Messages:
    23,912
    Likes Received:
    7,338
    Your Z steps per MM are probably wrong. What number do you have in the firmware you loaded?
     
    #2 mark tomlinson, Aug 28, 2016
  3. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
    Staff Member

    Joined:
    Feb 21, 2013
    Messages:
    23,912
    Likes Received:
    7,338
    Here are the correct numbers for an R1+

    #define DEFAULT_AXIS_STEPS_PER_UNIT {80,80,800,723.38} // default steps per unit for RoBo 3D R1
     
    #3 mark tomlinson, Aug 28, 2016
  4. woofguy

    woofguy New Member

    Joined:
    Jul 31, 2016
    Messages:
    10
    Likes Received:
    1
    mine are the same EXCEPT i changed the 723.38 to 420 for the titan extruder.... i read that was right one for extruder?
     
    #4 woofguy, Aug 28, 2016
  5. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
    Staff Member

    Joined:
    Feb 21, 2013
    Messages:
    23,912
    Likes Received:
    7,338
    Can't speak for the titan. Don't use one and few others do.

    You need someone who worked with a titan to talk about that, but the problem seems to be the Z steps. Not the extruder. The Z steps is the 3rd parameter. {X, Y, Z, E}
     
    #5 mark tomlinson, Aug 28, 2016
  6. woofguy

    woofguy New Member

    Joined:
    Jul 31, 2016
    Messages:
    10
    Likes Received:
    1
    so than my setting of 800 is correct?
    any other ideas?
     
    #6 woofguy, Aug 28, 2016
  7. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
    Staff Member

    Joined:
    Feb 21, 2013
    Messages:
    23,912
    Likes Received:
    7,338
    I don't see how it can be anything other than the Z steps being off. Way off. If you did not touch the leadscrews that is.
    If all you changed was the extruder that is all that should matter.
    If you are certain the 800 is correctly loaded then the only other culprit is bad electronics (possible bad stepper drivers or bad ramps or bad arduino) and really... it sounds OK except for the one axis.
     
    #7 mark tomlinson, Aug 28, 2016
  8. woofguy

    woofguy New Member

    Joined:
    Jul 31, 2016
    Messages:
    10
    Likes Received:
    1
    the only thing i did to the leadscrews, is manually turn them (with power off of course) to unmount/remount the carriage.
    that wouldnt do this?
     
    #8 woofguy, Aug 28, 2016
  9. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
    Staff Member

    Joined:
    Feb 21, 2013
    Messages:
    23,912
    Likes Received:
    7,338
    No, absolutely not.
    Only changing them mechanically to a different thread would make a difference.
     
    #9 mark tomlinson, Aug 28, 2016
  10. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
    Staff Member

    Joined:
    Feb 21, 2013
    Messages:
    23,912
    Likes Received:
    7,338
    You can experiment by cutting the Z steps in half and see if that has any effect.
    Will let you know it is doing anything...
     
    #10 mark tomlinson, Aug 28, 2016
  11. woofguy

    woofguy New Member

    Joined:
    Jul 31, 2016
    Messages:
    10
    Likes Received:
    1
    Ok, so that was a good exercise!
    I tried cutting it down to 400 and it was slooooow as dirt, BUT it seemed to change.
    I moved it back to 800 and uploaded again *BANG* it seems to be working ok now.
    Perhaps a bad upload the first time?
     
    #11 woofguy, Aug 28, 2016
    mark tomlinson likes this.
  12. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
    Staff Member

    Joined:
    Feb 21, 2013
    Messages:
    23,912
    Likes Received:
    7,338
    Yup. It happens :)
     
    #12 mark tomlinson, Aug 28, 2016
    woofguy likes this.
  13. danzca6

    danzca6 Well-Known Member

    Joined:
    Jul 27, 2015
    Messages:
    2,161
    Likes Received:
    1,077
    So when you went to change the E steps for the titan, did you accidentally change the Z instead? Also, after any firmware upload if you are on the R1+ or the newer V3 version for the R1s you should send the command M502 followed by M500 to refresh the EEPROM with the newly uploaded firmware settings. What do you have if you send an M503 command? It should dump your steps for all axis.
     
    #13 danzca6, Aug 28, 2016
  14. danzca6

    danzca6 Well-Known Member

    Joined:
    Jul 27, 2015
    Messages:
    2,161
    Likes Received:
    1,077
    Oh sorry didn't see you got it solved.
     
    #14 danzca6, Aug 28, 2016
  15. mark tomlinson

    mark tomlinson ༼ つ ◕_ ◕ ༽つ
    Staff Member

    Joined:
    Feb 21, 2013
    Messages:
    23,912
    Likes Received:
    7,338
    Still, good point about the EEPROM I am always forgetting about that since I do not normally use it.
     
    #15 mark tomlinson, Aug 28, 2016
  16. woofguy

    woofguy New Member

    Joined:
    Jul 31, 2016
    Messages:
    10
    Likes Received:
    1
    just wanted to thank you both for all of you help! especially @danzca6 for putting up with all my DMs and responding so quickly. i finally have my new hardware working. ive attached some photos of my @3dbenchy. i think its respectable, but could prolly use a few more tweaks. the Titan and V6 are great, just need to dial them in a little more. thank you both again for all of your help with this!
     

    Attached Files:

    #16 woofguy, Aug 31, 2016
  17. danzca6

    danzca6 Well-Known Member

    Joined:
    Jul 27, 2015
    Messages:
    2,161
    Likes Received:
    1,077
    Awesome! Glad I was able to provide you some help getting things going. Happy printing man. Cheers!
     
    #17 danzca6, Aug 31, 2016
Thread Status:
Not open for further replies.

Share This Page