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WorkBee 1010 homing and endrun switches issues

Discussion in 'OpenBuilds Forum Help' started by bigbridge, Dec 29, 2019.

  1. bigbridge

    bigbridge New
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    I'm new to CNC, so apologize if my issues are trivial!
    Please, help me troubleshooting my brand new built WB 1010.
    I double checked all connections to steppers and to xPro V3 connectors (both motors and switches).
    I set all grbl parameters as told in the mounting video. Issues and questions are still here:
    1) Why in the video you let the "limit switch installed" toggle set to off? With this set endruns are ignored and, e.g., the Y motors stop in different times when reaching the end and the gantry goes wrong (on one side there's the switch that phisically blocks the run while on the other side it goes on for a couple cm more)
    2) I tried many times to do "homing" but always got an error on the first axys (Z): please see attached photo of the error. I tried incrementing pulloff value as hinted but got the same result WB_1010.jpg
    3) X and Y axys manual jogging is ok but jogging Z axys gives strange behaviour: both up and down buttons seem to act random: sometimes the "up" button sends up and the next time you press it sends down and so for the "down" one! As I told all wiring is ok, so what?
    4) When moving X and Y axys are smooth and only the stepper hiss can be heard but when Z moves it makes a lot of noise and vibrations but it seems correctly assembled: is this normal?
    Sorry for so many questions but I spent many hours troubleshooting before posting and couldn't find any answer! Thanks in advance for your time :)
     
  2. Gary Caruso

    Gary Caruso OpenBuilds Team
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    Hi Bigbridge,
    The Z axis issues sound like either a wire is loose or incorrectly paired coils.. or you just need to increase the current on that channel, try increasing (click-wise turn of the z-pot) a 1/4 turn and try again.
    As for the ends crashing, avoid commanding past the ends first off, and second many people install some type of phisical stop such as a bumper to keep the machine from bending itself off square.
    Best practice is to get everything working well before trying limit switches or homing. Things need to be moving reliably first! Many people never use home or limits and work this way for years.. I for example almost never use home except for when using expensive material or complex projects, and I don't have limit switches.

    Cheers
    Gary
     
  3. bigbridge

    bigbridge New
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    Thanks Gary, I'll try increasing the current. Maybe this is the indirect reason for homing error in Z axys?
    It can't find the switch but I tested it and V goes to 0V when activated!
    I'll find and install a bumper as well! No hint for point 4 (Z axys strong noise)?
    Thanks again, I'll let you know results!
    Enzo
     
  4. Gary Caruso

    Gary Caruso OpenBuilds Team
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    Yes, the z axis noise, failure to move reliable and home failing is all related.
    Gary
     
    Alex Chambers likes this.
  5. bigbridge

    bigbridge New
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    I increased Z current by a quarter turn clockwise and now moving is more steady (some vibrations again however).
    But the strange buttons behaviour persists: I click on the up button in the application once and it goes up, again and it goes up, again and it starts to go down.
    Now press the down button and and it goes down or up randomly (or I can't find a reason for this).
     
  6. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    For total beginners, Endstops add some extra "i don't understand it" so starting off without them is just a little easier for the Newbies :) - gets you testing and jogging without having to understand homing, etc

    The error relates to Max Travel distances, not Homing Pull off: See gnea/grbl - it will only seek those values x1.5 if it doesnt find a switch in that distance, you get the error shown


    Sounds like wiring: make sure you have a coil on the first 2 pins of the connector and another coil on the second. Color codes may be different if its old stock, different supplier/reseller, or a different motor so best to confirm the coils with a multimeter
    That, or only 3 of the 4 wires are making good contact

    Exactly what happens when either the coils are incorrecty wired, or only 3 of the 4 wires make contact - recheck wiring :)



    Exactly! :) neither do I (;
    The only real use for homing in my book is if you are running the same job over and over day after day, then its nice to build jigs, and be able to rehome the next day and carry on without having to find work origin again
    These: Rubber Feet Set (4 Pack) with some M5s, and Tee nuts make great bumpstops :)
     
  7. bigbridge

    bigbridge New
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    Thanks a lot, Peter: I reworked all connections to Z axys and now it runs smooth as other steppers!
    I guess some connector screw didn't catch the copper but the insulating plastic.
    Now I hear a hiss from the X axys stepper when it's stopped while all the others are silent: any hint for this?
    It runs smoothly when powered.
     
  8. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    A bit of a hiss is not abnornal, playing with the current adjustment can sometimes change it.

    Modern stepper drivers employ chopping current limiters, and they can sometimes result in a little audible noise when they are just doing what they are supposed to (keeping the motor at the set current limit by chopping the output voltage with a fast pwm signal)
     
  9. Gary Caruso

    Gary Caruso OpenBuilds Team
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    I would also recheck all motor wiring, if you had issues with the Z maybe more issues, but not as bad to cause it not to "work".
    Cheers
    Gary
     
  10. bigbridge

    bigbridge New
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    Ok, I'll try to adjust the current. One last question: after uploading the "hello world" G-code to the control software (updated to last version available) it shows correctly and simulates the path but in the video I see I should be able to move it in 3D (as in Cura e.g.) but I can only move it on the plane by the right mouse, left mouse does nothing. I tried using "alt", "ctrl" and "shift" with right or left mouse but it never rotates in 3D as seen in the video. Can you tell me what I'm doing wrong?
     
  11. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Middle mouse button drag :)
     
  12. bigbridge

    bigbridge New
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    Of course, the one I didn't check :)
    Reducing the current by 1/8 turn on the X axys stopped the hiss, too!
    Thanks! Now I can start learning CNC!
     
    Peter Van Der Walt likes this.

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