The Ender 5 pro home position



  • Where is the 5 pro home position? And what does that actually mean? I have only printed a couple items. I'm a newbie and the software learning curve is steep. I printed the cat from the SD card and it came out perfect. Then I tried a few items from Thingiverse, the LCD cover came out pretty good, everything else has failed. It seems like the nozzle always parks itself in the back right corner and every print wants to begin from there. It should begin closer to the center of the bed. Is that correct?



  • @Tucats said in The Ender 5 pro home position:

    no matter how many changes that I make to X and Y my prints fail at this location.

    Re-reading your last post. If i understand this right, you are trying to manually (by hand or menu buttons) move the carriage somewhere before selecting the file and starting the print, hoping that it starts printing there?

    If so, no, it does not work that way. The position of the carriage before the print is started makes no difference. The "G28 ;Home" (in Start G-code of my last post snapshot) means the carriage will reset its position. It will then go on printing according to where the model was located when the gcode was exported from the slicer.

    Does that help?



  • @Tucats That's no good! So...

    • in the slicer, you have the model showing up nicely in the middle of the bed?
    • in the slicer machine settings, the bed is the right size for Ender 5 pro? (i guess 220x220)
    • "Origin at center" is UNchecked?

    da36ff52-1676-4d99-b634-7e98a6575a0a-image.png

    • you export the gcode file with "Save to Disk" button?
    • you're sure that this is the file you printing? (not some old one already on there, can happen)


  • Well, I am ready to give up. I still have the same problem (the object begins printing at the home position) and no matter how many changes that I make to X and Y my prints fail at this location. I have to figure out how to get the print to start in the middle of the plate.



  • @SteveDee said in The Ender 5 pro home position:

    @telephasic That's a good explanation.
    I'm amused by the idea that I may have been sitting on the wrong side of my cr10-v3, as it 'homes' bottom left, rather than top right! 🙂 "G28 Sweet G28"

    Thanks. Haha hang that on your wall 😛 Noo, no right/wrong sides here, just i see the CR-10's X limit switch is on the left, so that model (and ender-3, etc) goes looking for x=0, y=0 directly. And bottom for that kind of printer is the same as what i called top (bed=top) for ender-5/6: nozzle closest to the bed.

    I'm sure when I first started using my printer, that the final 'dip' in the homing sequence would stick that snotty bit of PLA to the corner of the bed, before the head moved off to print a 'purge' line. Don't know if that was by design, but must give that corner of the bed a good clean today and see if can do it again.

    Yeah that kind of detail might have changed with firmware updates (if it really happens with G28?). Or might have been in your machine settings start G-code where the purge line is written? If you changed printer profiles maybe that movement got lost.



  • @telephasic That's a good explanation.
    I'm amused by the idea that I may have been sitting on the wrong side of my cr10-v3, as it 'homes' bottom left, rather than top right! 🙂 "G28 Sweet G28"

    I'm sure when I first started using my printer, that the final 'dip' in the homing sequence would stick that snotty bit of PLA to the corner of the bed, before the head moved off to print a 'purge' line. Don't know if that was by design, but must give that corner of the bed a good clean today and see if can do it again.



  • Long-winded explanation:

    After powering on, and generally every time the printer doesn't know where the nozzle is (it could have been moved manually), it has to go looking. It goes to maximum X (right), moving in that direction until it hits the end-stop limit switch, then stops. Then does the same for Y (to the rear), and finally minimum Z (max bed height).

    The place where it ends up, the back right top corner, is X=max, Y=max, Z=0. Once it has found this reference place, it can keep track of every movement to know where it is at any given time.

    The origin/datum is where X=0, Y=0, Z=0, which is the front left top corner. That will be the corner with the red/green/blue arrows in the slicer. "Home" might depend on settings and context, whether it's the back right corner where the end-stops were all triggered, or for example with a bl-touch it goes to the middle of the bed to find Z=0, and then probably backs off a bit.

    It's not really about being a convenient place to start a print, just how the printer designers laid out X, Y, and Z.

    (Edit: got ahead of myself, forgot back right is max corner, and mixing origin and home)



  • @SteveDee Thanks! That helps me a lot. I believe I now know why my projects won't print properly. I will make adjustments before I slice. I am printing the cat again from the SD card and it is coming out perfect in the center of the bed. Cheers.



  • @Tucats Your Home position will be in one of the corners, and it will always start from there. But where it prints your object on the bed is down to you.

    When you download files from Thingiverse and open the .stl file in your slicer, you can then centre it or move it to wherever you want it, before you slice it.

    I hope that helps.


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