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    Need advice on new heated bed aluminium plate

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    • TLeTourneauundefined
      TLeTourneau @mrehorstdmd
      last edited by TLeTourneau

      @mrehorstdmd thanks for the reply, I'll keep the mount in mind. I guess I have to decide between the 5/16 (12.22lbs, 7.9375mm) or 3/8" (14Lbs, 9.525mm). It's a fairly large build area (at least in my mind) and I'm concerned about rigidity. I have a 3mm heat bed now and it is not the most rigid thing in the universe. 🙂

      I also can't seem to get a good automatic bed level (my dual Z's are independently driven) or a good mesh. I'm using dc42's mini differential IR sensor but I can start another thread for that. I do have a 1/4" glass top on the bed.

      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
      • wilrikerundefined
        wilriker @Ricky_Grade10
        last edited by

        @ricky_grade10 said in Need advice on new heated bed aluminium plate:

        I know some of you are aware of these plates...

        https://clever3d.de/epages/7a4290fc-7c7f-46cc-9b99-eadef22228e2.sf/seca129485ade/?ObjectPath=/Shops/7a4290fc-7c7f-46cc-9b99-eadef22228e2/Products/c3d-DDP-PEI-natur

        I am actually really aware of exactly this shop and plate. I was considering to buy one of these but: the price compared to an uncoated plate is insane. 220mm² uncoated (different shop, same plate) cost 15 €. The coated one you linked 55 €. That's 40 € for PEI on both(!) sides - who needs PEI on the side where the heater is attached anyway?

        Only real advantage of this plate would be to have the holes for mounting screws already drilled as compared to the other one and I don't have neither a drill press nor a milling machine, so drilling exact holes with only a cordless drill is a bit daunting. 😱

        Manuel
        Duet 3 6HC (v0.6) with RPi 4B on a custom Cartesian
        with probably always latest firmware/DWC (incl. betas or self-compiled)
        My Tool Collection

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

          Does anyone think the additional weight of going with a 14lb (3/8") plate over a 12.2lb (5/16") plate would have a detrimental effect on the Z axis?

          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

          deckingmanundefined 1 Reply Last reply Reply Quote 0
          • DeltaConundefined
            DeltaCon @wilriker
            last edited by

            @wilriker said in Need advice on new heated bed aluminium plate:

            who needs PEI on the side where the heater is attached anyway?

            Lots of people use these plates on top of the heated alu bed (with clamps). It is nice to have a plate that you can turn over to choose between a glossy or a matte finish.

            If you think trial and error is dangerous, try routine. That's even more so!

            1 Reply Last reply Reply Quote 1
            • deckingmanundefined
              deckingman @TLeTourneau
              last edited by

              @tletourneau said in Need advice on new heated bed aluminium plate:

              Does anyone think the additional weight of going with a 14lb (3/8") plate over a 12.2lb (5/16") plate would have a detrimental effect on the Z axis?

              Probably not.

              BTW I've replied to the other thread that you've started with more or less the same topic.

              Ian
              https://somei3deas.wordpress.com/
              https://www.youtube.com/@deckingman

              1 Reply Last reply Reply Quote 0
              • mingtaialundefined
                mingtaial @fcwilt
                last edited by

                @fcwilt [https://www.aluminum-alloy-supplier.com/aluminum-plate/](link https://www.aluminum-alloy-supplier.com/aluminum-plate/)

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                • jens55undefined
                  jens55
                  last edited by

                  Pardon the slightly off thread question but I have tried PEI on glass with 486MP and had nothing but issues. Both items came from Amazon and maybe that was the problem but the PEI curled something fierce at higher temperatures (it's been a while but I am thinking it was ok to about 60C) and it also developed bubbles/areas where the 486MP let go.
                  Disappointed doesn't even get close to how I felt about that mess. The off topic question - how do you spread silicone RTV glue into a smooth consistent layer so your PEI stays smooth and flat ?

                  Phaedruxundefined 1 Reply Last reply Reply Quote 0
                  • Phaedruxundefined
                    Phaedrux Moderator @jens55
                    last edited by

                    @jens55 How thick was your PEI sheet? The 486MP shouldn't let go that easily, and the PEI should be thick enough to be stiff enough to resist and cupping.

                    Z-Bot CoreXY Build | Thingiverse Profile

                    jens55undefined DeltaConundefined 3 Replies Last reply Reply Quote 0
                    • jens55undefined
                      jens55 @Phaedrux
                      last edited by

                      @Phaedrux, I'd have to dig it out and measure it but it was substantial ... I am thinking in the order of 1 mm. I will see if I can find it in the morning and measure it.

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                      • DeltaConundefined
                        DeltaCon @Phaedrux
                        last edited by

                        @Phaedrux Yes, but I think the difficulty is getting no air trapped in the glue-liner. It expands when heated and causes the issues like unevenness and will work areas loose eventually. I have a glass plate and a 6mm alu plate both with thick PEI glued on top. I am very happy with how it sticks, but absolutely NOT with how even it is. I am a trained signmaker so I know how to prevent airbubbles and I have none visually, but nevertheless it's uneven enough to spoil first layers.

                        If you think trial and error is dangerous, try routine. That's even more so!

                        1 Reply Last reply Reply Quote 1
                        • jens55undefined
                          jens55 @Phaedrux
                          last edited by

                          @Phaedrux, confirmed 1 mm thickness ....
                          I did actually take great care with the installation of the glue sheet (seperate sheet so two chances of getting air trapped) and thought I did well but chances are it got mucked up first time I went too hot. Just for laughs, I can get the edges to curl up about an INCH !!!
                          This is going back a while so I might be off by a bit but it wasn't just a mm here or there 😞
                          I still suspect that I got some kind of a clone product but have no way of finding out if it is the real thing and I was not about to spend another $20 on a new sheet of PEI. I went back to printing on straight glass (no glues, hairspray or other magic potion)

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