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    Remounting my print bed

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    • Danalundefined
      Danal
      last edited by Danal

      At this time, PaneDue support is somewhat limited if you also have a Pi. A different tradeoff: A Pi is the only way to do WiFi (stand alone is wired Ethernet only).

      It is a tough call... and I realize a lot of people really like their Panel. For me, it is Pi all the way. Way, way, too many things that Pi can do...

      For example, I'm developing scripts that auto-align a multi tool printer. Requires the Pi. https://github.com/DanalEstes/DuetPython And a general interface to allow almost anything to be done in Python on the Pi. https://github.com/DanalEstes/PythonDSF (DSF = Duet Software Framework)

      Delta / Kossel printer fanatic

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      • TLeTourneauundefined
        TLeTourneau
        last edited by

        Well, for cost savings I ordered a Duex 5 to use with my existing Duet. I'm going with the 3 T12x2 lead screws, now I'm just trying to figure out how to mount the bed. I think I see what you're saying about mounting the bed using U channel, I may be able to mount the bed to some small pieces of 2020 too. The ball screws I have seem to slide on that surface alright. I''l have to see what I can figure out, all of the parts will be here in a few days. I also ordered a Hemera and a Wham Bam magnetic print system to try out.

        Thanks,
        Tom

        TronXY X5S-500 (CoerXY)
        Duet 2 Ethernet v1.04
        Firmware Version: 2.02(RTOS) (2018-12-24b1)
        Web Interface Version: 1.22.6
        7" PanelDue
        E3D V6 Clone
        MOSFET's for hot end
        1000w Keenovo with SSR for heat bed
        dc42 Mini IR Sensor or BLTouch

        1 Reply Last reply Reply Quote 0
        • TLeTourneauundefined
          TLeTourneau
          last edited by

          Strange question but what c channel size would you guys recommend for the ball head screws? It looks like the most common would be 5/16" (8mm) which is actually 8.7mm across internally or 1/4" (6mm)? The ball head measures 8.7mm across so I am leaning towards the 5/16" but I thought I'd see advice first.

          Thanks in advance!

          Thanks,
          Tom

          TronXY X5S-500 (CoerXY)
          Duet 2 Ethernet v1.04
          Firmware Version: 2.02(RTOS) (2018-12-24b1)
          Web Interface Version: 1.22.6
          7" PanelDue
          E3D V6 Clone
          MOSFET's for hot end
          1000w Keenovo with SSR for heat bed
          dc42 Mini IR Sensor or BLTouch

          1 Reply Last reply Reply Quote 0
          • mrehorstdmdundefined
            mrehorstdmd
            last edited by

            How are you planning to implement the kinematic mount? Will the channel be on the bed plate or on the support(s)?
            Are you making a Maxwell or Kelvin type?

            I saw someone's design that put the spherical head screws in the bed plate and put the slot for the pitch adjuster on the lifter attached to the guide rail bearing block. The slot was made from two pieces of round steel mounted in a printed plastic block. They were lifting the bed with 3 screws and using auto tramming.

            https://drmrehorst.blogspot.com/

            TLeTourneauundefined Danalundefined 2 Replies Last reply Reply Quote 1
            • TLeTourneauundefined
              TLeTourneau @mrehorstdmd
              last edited by

              @mrehorstdmd said in Remounting my print bed:

              Maxwell or Kelvin type

              I'm had attempted to implement and am shooting for a Kelvin type tetrahedron-vee-flat. I was not able to machine a smooth channel/groove for the two constraint point in my build plate and am wondering if affixing a c channel to the bottom of my build plate for the two constraint point will alleviate that issue. I plan on using that in conjunction with triple Z auto bed leveling.

              Thanks,
              Tom

              TronXY X5S-500 (CoerXY)
              Duet 2 Ethernet v1.04
              Firmware Version: 2.02(RTOS) (2018-12-24b1)
              Web Interface Version: 1.22.6
              7" PanelDue
              E3D V6 Clone
              MOSFET's for hot end
              1000w Keenovo with SSR for heat bed
              dc42 Mini IR Sensor or BLTouch

              mrehorstdmdundefined 1 Reply Last reply Reply Quote 0
              • mrehorstdmdundefined
                mrehorstdmd @TLeTourneau
                last edited by

                @TLeTourneau Do you have a drawing or CAD model of it?
                How will you mount a heater on the bed plate if there's a U channel there?

                https://drmrehorst.blogspot.com/

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                • TLeTourneauundefined
                  TLeTourneau
                  last edited by

                  The heater is inset 25mm from the edge of the bed on all sides.

                  This is the front which is the single constraint:
                  20200304_152756.jpg

                  This is the right rear which is the triple constraint:
                  20200304_152810.jpg

                  This is the left rear which is the double constraint and the one I had the problem with creating a smooth channel. I'm hoping that mounting an U channel here will help with the issue.
                  20200304_152804.jpg

                  Thanks,
                  Tom

                  TronXY X5S-500 (CoerXY)
                  Duet 2 Ethernet v1.04
                  Firmware Version: 2.02(RTOS) (2018-12-24b1)
                  Web Interface Version: 1.22.6
                  7" PanelDue
                  E3D V6 Clone
                  MOSFET's for hot end
                  1000w Keenovo with SSR for heat bed
                  dc42 Mini IR Sensor or BLTouch

                  mrehorstdmdundefined 1 Reply Last reply Reply Quote 0
                  • mrehorstdmdundefined
                    mrehorstdmd @TLeTourneau
                    last edited by

                    @TLeTourneau OK, so the right rear screw is the reference, the left rear is the pitch adjuster and the front center is the roll adjuster. I see springs on all 3 screws. I assume they are there to keep the screw upright because they fit loosely in their holes. That means the entire bed plate is standing on 3 wobbly screws. That isn't going to be good for print quality.

                    You really want the screws to be threaded into something that will hold them tightly and prevent wobble while still allowing them to be turned for adjustment purposes. I used PTFE blocks for that. The blocks can be screwed down tightly, and using slightly undersized holes for the leveling screws will allow them to roll their threads into the PTFE. The leveling screws won't wobble, and that means the bed won't wobble. PTFE is good for this because it won't melt, no matter how hot you run the bed, and the screws can be turned easily. Nylon won't work because the friction is so high you won't be able to turn the leveling screws (I tried). There's a reason they use nylon in nylock nuts! You can find a small, inexpensive PTFE bar or block on ebay if you shop carefully and compare the price/weight of the different offerings.

                    This is how I mounted the screws in UMMD:

                    alt text

                    A single t-nut and screw hold the PTFE block on the t-slot, and the leveling screw threads into the PTFE. The PTFE blocks have antirotation tangs on the bottom that fit into the t-slot. If you can't cut tangs into the blocks, just mount them using 2 screws and t-nuts.

                    Cutting a short slot in the edge of the plate can provide the needed constraint at the pitch screw. Otherwise a short piece of C channel screwed to the bottom of the bed plate should work OK. The bed plate is only going to expand 0.5 mm or so, so you don't need a long slot for the leveling screw head to sit inside.

                    https://drmrehorst.blogspot.com/

                    TLeTourneauundefined 2 Replies Last reply Reply Quote 1
                    • TLeTourneauundefined
                      TLeTourneau @mrehorstdmd
                      last edited by

                      @mrehorstdmd said in Remounting my print bed:

                      PTFE bar or block

                      Yeah, I tried finding some when I built it out the first time and struck out. I'm going to give it another try. I really appreciate the responses!

                      Thanks,
                      Tom

                      TronXY X5S-500 (CoerXY)
                      Duet 2 Ethernet v1.04
                      Firmware Version: 2.02(RTOS) (2018-12-24b1)
                      Web Interface Version: 1.22.6
                      7" PanelDue
                      E3D V6 Clone
                      MOSFET's for hot end
                      1000w Keenovo with SSR for heat bed
                      dc42 Mini IR Sensor or BLTouch

                      1 Reply Last reply Reply Quote 0
                      • TLeTourneauundefined
                        TLeTourneau @mrehorstdmd
                        last edited by

                        @mrehorstdmd said in Remounting my print bed:

                        Nylon won't work because the friction is so high you won't be able to turn the leveling screws (I tried).

                        Do you think derlin would work? My brother can get derlin in the sizes that would work.

                        Thanks,
                        Tom

                        TronXY X5S-500 (CoerXY)
                        Duet 2 Ethernet v1.04
                        Firmware Version: 2.02(RTOS) (2018-12-24b1)
                        Web Interface Version: 1.22.6
                        7" PanelDue
                        E3D V6 Clone
                        MOSFET's for hot end
                        1000w Keenovo with SSR for heat bed
                        dc42 Mini IR Sensor or BLTouch

                        1 Reply Last reply Reply Quote 0
                        • Danalundefined
                          Danal @mrehorstdmd
                          last edited by Danal

                          @mrehorstdmd said in Remounting my print bed:

                          I saw someone's design that put the spherical head screws in the bed plate and put the slot for the pitch adjuster on the lifter attached to the guide rail bearing block. The slot was made from two pieces of round steel mounted in a printed plastic block. They were lifting the bed with 3 screws and using auto tramming.

                          Jubilee does this. Works very well.

                          Delta / Kossel printer fanatic

                          1 Reply Last reply Reply Quote 1
                          • Danalundefined
                            Danal
                            last edited by Danal

                            IMG_0306.jpeg

                            baf5fe6b-42f7-423e-921f-aee807d0c577-image.png

                            3274e2a7-e746-41c3-86a2-f6ebc3f5fa78-image.png

                            4529f43b-70b7-4ab3-8ef9-56fa35cf1df3-image.png

                            Delta / Kossel printer fanatic

                            mrehorstdmdundefined TLeTourneauundefined 2 Replies Last reply Reply Quote 1
                            • mrehorstdmdundefined
                              mrehorstdmd @Danal
                              last edited by

                              @Danal That's the one!

                              https://drmrehorst.blogspot.com/

                              1 Reply Last reply Reply Quote 0
                              • TLeTourneauundefined
                                TLeTourneau @Danal
                                last edited by

                                @Danal
                                That is very nice, now I wish I had thought to have tabs machined into my build plate! 🙂 Looking at that design I'm wondering if I'll need the 12mm linear rods. I'm going to have 3 T12x2 lead screws, 2 on the outside edges of the build plate on one side and one in the center on the other side. The build plate is attached to a relatively solid frame mode of 2020 and aluminum bar shown in the first and thirteenth posts. The aluminum bar is being replaced with a 3/8"x1-1/2" piece of 6061-T6511 aluminum bar to minimize flex.

                                Thanks,
                                Tom

                                TronXY X5S-500 (CoerXY)
                                Duet 2 Ethernet v1.04
                                Firmware Version: 2.02(RTOS) (2018-12-24b1)
                                Web Interface Version: 1.22.6
                                7" PanelDue
                                E3D V6 Clone
                                MOSFET's for hot end
                                1000w Keenovo with SSR for heat bed
                                dc42 Mini IR Sensor or BLTouch

                                mrehorstdmdundefined 1 Reply Last reply Reply Quote 0
                                • mrehorstdmdundefined
                                  mrehorstdmd @TLeTourneau
                                  last edited by

                                  @TLeTourneau It's just aluminum. You can cut it with many types of saws, including a hack saw. Machining is not required...

                                  https://drmrehorst.blogspot.com/

                                  TLeTourneauundefined 1 Reply Last reply Reply Quote 0
                                  • TLeTourneauundefined
                                    TLeTourneau @mrehorstdmd
                                    last edited by

                                    @mrehorstdmd
                                    Yeah but I don't want to make my print bed smaller. 😀

                                    Thanks,
                                    Tom

                                    TronXY X5S-500 (CoerXY)
                                    Duet 2 Ethernet v1.04
                                    Firmware Version: 2.02(RTOS) (2018-12-24b1)
                                    Web Interface Version: 1.22.6
                                    7" PanelDue
                                    E3D V6 Clone
                                    MOSFET's for hot end
                                    1000w Keenovo with SSR for heat bed
                                    dc42 Mini IR Sensor or BLTouch

                                    1 Reply Last reply Reply Quote 0
                                    • TLeTourneauundefined
                                      TLeTourneau
                                      last edited by

                                      I learned something this weekend, I'm not a machinist! 😆 Although I gave it a valiant effort I wasn't able to create the new side support bars for my bed out of the 1.5" x 3/8" 6061-T6511 aluminum bar. Although I had a vice on my drill press I was not able to get the holes for the lead screws and guide rods centered and square to each other on the bars. I've contacted a local machine shop and they should have them made for me in a week or two. I may put a small milling or CNC machine on my wish list for the future.

                                      Thanks,
                                      Tom

                                      TronXY X5S-500 (CoerXY)
                                      Duet 2 Ethernet v1.04
                                      Firmware Version: 2.02(RTOS) (2018-12-24b1)
                                      Web Interface Version: 1.22.6
                                      7" PanelDue
                                      E3D V6 Clone
                                      MOSFET's for hot end
                                      1000w Keenovo with SSR for heat bed
                                      dc42 Mini IR Sensor or BLTouch

                                      1 Reply Last reply Reply Quote 0
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