A new one even for me.

Discussion in 'BigBox General Chat' started by KNM3D, Mar 6, 2017.

  1. KNM3D

    KNM3D Well-Known Member

    Joined:
    Sep 4, 2015
    Messages:
    150
    Likes Received:
    4
    so im printing along woohoo.:)
    then i go to do my print it heats up just fine, homes and then when it is supose to go back to the dump chamber the z axis just starts going down.
    and unless i stop the print the bed will bottom out.

    what would cause this? lol

    i didnt do anything different except load a gcode profile of a part onto the sd card inserted it into the printer and chose the print to print just like every other time i have printed something.

    any help would be awsome thank you,
    KNM.
     
  2. Henry feldman

    Henry feldman Well-Known Member

    Joined:
    Sep 5, 2015
    Messages:
    969
    Likes Received:
    389
    Does your Z-probe light up?
     
  3. KNM3D

    KNM3D Well-Known Member

    Joined:
    Sep 4, 2015
    Messages:
    150
    Likes Received:
    4
    yes it does,
    it homes great.
    but then when i go to print it homes again of course and instead of going to the dump chamber before starting the print the z axis just starts going down and doesnt stop
     
  4. KNM3D

    KNM3D Well-Known Member

    Joined:
    Sep 4, 2015
    Messages:
    150
    Likes Received:
    4
    well never mind, i just returned to failsafe. fixed it right up for me.
    **************
    so I fixed the z axis bottoming out issue.
    but now I get thermal runaway. uhg,

    do I just need to reload the FFF from git hub again?
     
    #4 KNM3D, Mar 6, 2017
    Last edited: Mar 6, 2017
  5. KNM3D

    KNM3D Well-Known Member

    Joined:
    Sep 4, 2015
    Messages:
    150
    Likes Received:
    4
    what would cause this?
    so I fixed the z axis bottoming out issue.
    but now I get thermal runaway. uhg,

    do I just need to reload the FFF from git hub again?
     
  6. KNM3D

    KNM3D Well-Known Member

    Joined:
    Sep 4, 2015
    Messages:
    150
    Likes Received:
    4
    so i get this beuty printing again, holds temp on the hotend for about 10-20 layers then starts dropping from 240* its print temo won to 225* which is when i get thermal runaway.
    should i be getting a new pt 100 to plug in? or whatdo you guys think. im kinda lost at this stuff.

    could the heater block not having the blue silicone sock around it any more cause this. since i use to have it on all the time but then the heater block got covered in a good amount of plastic because of a mishap.
    i got the heater block cleaned off as well as i could. would any of this cause my problems?
     
    #6 KNM3D, Mar 7, 2017
    Last edited: Mar 7, 2017
  7. jfb

    jfb Well-Known Member

    Joined:
    Mar 30, 2016
    Messages:
    91
    Likes Received:
    18
    If the print cooling fan is kicking in, and if the airflow is hitting the nozzle/block then yes, not having the sock on could cause this.

    On my prusa i3, without the sock I have to keep the cooling fan below 30% or I get thermal runaway. With the sock on, it can run at 100% without causing me problems. I had fewer issues on the bigbox mainly because I can adjust the fan a little better there, but having the sock on still gives me fewer issues with cooling and thermal runaway.

    Obviously there could be other things going on, but the sock certainly can make a big difference.
     
  8. KNM3D

    KNM3D Well-Known Member

    Joined:
    Sep 4, 2015
    Messages:
    150
    Likes Received:
    4
    looks like the sock was the issue,

    now im getting crackling and tiny blemishes when I print my Edge material.
    im guessing this is because the filament has moisture in it.
     
  9. mike01hu

    mike01hu Well-Known Member

    Joined:
    Apr 22, 2014
    Messages:
    957
    Likes Received:
    166
    That does sound like moisture in the filament. You can dry it out by putting the spool in a bag with a silica gel pack and place it on the heated bed at 60C for a couple of hours.
     
  10. Henry feldman

    Henry feldman Well-Known Member

    Joined:
    Sep 5, 2015
    Messages:
    969
    Likes Received:
    389
    Edge as @mike01hu notes is very, very sensitive to moisture (like at a Nylon level). I bake it each time in my PrintDry which has made success where I mostly had failures. I haven't printed in anything but Edge in weeks, since I've started keeping one spool on for the job and one baking at all times, and simply switch back and forth...
     
    mike01hu likes this.
  11. KNM3D

    KNM3D Well-Known Member

    Joined:
    Sep 4, 2015
    Messages:
    150
    Likes Received:
    4
    what temp do do you set your dryer for for edge? how large of a spool?

    as a good rule of thumb if im not worried about drying time can I just put the dryer on say 70* F for all materials and just let them back for say 4 hours for 1kg rolls and 8 hours for 2kg rolls?
     
  12. Henry feldman

    Henry feldman Well-Known Member

    Joined:
    Sep 5, 2015
    Messages:
    969
    Likes Received:
    389
    I've been baking the edge at 70C for 6 hours with the regular spools.
     

Share This Page