Duet3D Logo Duet3D
    • Tags
    • Documentation
    • Order
    • Register
    • Login

    To rework the Y axis or more ?

    Scheduled Pinned Locked Moved
    General Discussion
    3
    5
    246
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • Dad003undefined
      Dad003
      last edited by

      so him thinking about reworking my Y axis on the printer , i was testing for higher acceleration and found out that my current setup because of the long BMGx2 mount cause flexing issue that are not visible at low speed. so i need to reduce the mass and shorten the extruder mount . removing the 2040 extrusion would be the first step but it make me redesign all the pulley and motor mount for that axis .

      so i have a few idea to maybe try. i could use some flat aluminum bar and screw the HGR15 rail on it , or i just use the HGR15 rail directly without any support and save weight , while reworking the mount and shortening everything, that would definitively help , it would reduce weight around of .5 to 1kg i believe .

      The other possibility here would be that i rework the whole printer and go from Cartesian to core xy which would then remove the stepper motor and eliminate another .5kg , in total it could be around 1 to 1.5 kg less . with current setup my best print speed without having too much ringing is around 20 to 40mm/sec, higher and it start to be a lot worse.

      if i was to switch to core xy i would definitively go with 12mm belt since they dont stretch as much.

      When i started this project my goal was to achieve nice print at over 50mm/sec minimum and him not there yet .

      so i am in need of idea or suggestion to achieve my goal . Any advice ?

      here the actual Y axis

      df707889-ec61-444a-bd86-d4deff2362d9-image.png

      mrehorstdmdundefined o_lampeundefined 2 Replies Last reply Reply Quote 0
      • mrehorstdmdundefined
        mrehorstdmd @Dad003
        last edited by

        @dad003 That looks like a LOT of moving mass. I've never seen a wiring harness to an extruder carriage that has so much "stuff" in it.

        Converting to corexy would probably take a major redesign, but should allow much lower moving mass. My corexy printer uses a 24 mm x 8 mm linear guide for the X axis without any other support and it works well, but the bed is only 300 mm wide. It looks like your machine may be bigger than that and might require some additional support.

        https://drmrehorst.blogspot.com/

        1 Reply Last reply Reply Quote 0
        • o_lampeundefined
          o_lampe @Dad003
          last edited by

          @dad003
          The problem with reworking is, you might need some new printed parts, but if this is your only printer, you're in trouble.
          Same with complete redesign.
          If you feel comfortable with designing and printing everything you need for your project before you take apart the printer, then go for it. I'd opt for CoreXY.

          Dad003undefined 1 Reply Last reply Reply Quote 0
          • Dad003undefined
            Dad003 @o_lampe
            last edited by

            @o_lampe

            it my only operational printer , but i would definitively print all the piece first before i take a part anything . i still have a few piece to draw , the more i think about it it seem that a redesign is the way to go

            Dad003undefined 1 Reply Last reply Reply Quote 0
            • Dad003undefined
              Dad003 @Dad003
              last edited by

              i ended up to draw a few things not fully sure about the belt tensioner. the reworked Y axis do look good on the other hand , belt need to be tightened from the back plate. any suggestion on that ?

              3d printer core xy.jpg

              1 Reply Last reply Reply Quote 0
              • First post
                Last post
              Unless otherwise noted, all forum content is licensed under CC-BY-SA