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    Yet another cast aluminum plate topic...

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    • TLeTourneauundefined
      TLeTourneau @SupraGuy
      last edited by

      @supraguy I'll get a machinist straight edge and check the plate, some of it could be in the allowed flatness as ATP-5 is has an allowed variance of +/- 0.127mm. The bed is not rigidly attached to the frame, I used a variation of the kinematic mount so the bed rests on three ball head screws and springs are used to ensure the bed remains stable. I did use alignment blocks when I installed the linear rails. However when I used a square to check the upper frame it appeared to be very slightly out of square. So I think the overall frame may be slightly out of square, I may take it apart and reassemble it using the square to validate this time and see if that helps.

      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

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      • Wyvernundefined
        Wyvern
        last edited by

        Got mine in!

        It ended up being straight forward.

        It's only 300W but I like that it warms slowly as to evenly heat for the first layer and there is less possibility for overshoot.

        Literally the first print so I'm not sure how well the PEI will stick- I didn't realise when I ordered it, it was so thin, less than a mm- those are not bubbles, it is where I squeegeed the water out.0_1549559900196_20190207_115946.jpg

        The SSR came with a chunky heat sink, with this low of power is it even necessary?

        mrehorstdmdundefined TLeTourneauundefined 2 Replies Last reply Reply Quote 0
        • mrehorstdmdundefined
          mrehorstdmd @Wyvern
          last edited by

          @wyvern I use 0.7mm thick PEI and it lasts for years. It's very tough stuff.

          https://drmrehorst.blogspot.com/

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          • Wyvernundefined
            Wyvern
            last edited by

            Cool.

            The test block popped off at 45C no problem, almost like glass with hairspray.

            I lost 10mm Z build volume 390vs 400, I could shim the bearings even more, but I'ts not often I build that high anyway.

            Next step is to route the wires so they are clean and out of the way- cable chain might be nice.

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            • TLeTourneauundefined
              TLeTourneau @Wyvern
              last edited by

              @wyvern said in Yet another cast aluminum plate topic...:

              Got mine in!

              It ended up being straight forward.

              It's only 300W but I like that it warms slowly as to evenly heat for the first layer and there is less possibility for overshoot.

              Literally the first print so I'm not sure how well the PEI will stick- I didn't realise when I ordered it, it was so thin, less than a mm- those are not bubbles, it is where I squeegeed the water out.0_1549559900196_20190207_115946.jpg

              The SSR came with a chunky heat sink, with this low of power is it even necessary?

              I am running a 1000 watt heater with my SSR, measured temp on the back of the SSR without a heatsink was around 35-40C which I think is reasonable so I am not going to install the big heatsink. 1000 watts at 120v is 8.333 amps, well under the 20 amp rating of the SSR.

              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
              • taconiteundefined
                taconite
                last edited by

                Is there a possibility to set max bed temperature?

                Custom ANET A8
                Custom Delta: D-PATCH (Delta Printer with Automatic Tool CHanging) https://forum.duet3d.com/topic/16082/d-patch?_=1596131234754

                All I do here is under this license: CC BY-NC-SA

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

                  @taconite said in Yet another cast aluminum plate topic...:

                  Is there a possibility to set max bed temperature?

                  It should be in your config.g file already, it'll be under ; Heaters and look something like this:

                  M143 H0 S120                                       ; Set temperature limit for heater 0 to 120C
                  M143 H1 S280                                       ; Set temperature limit for heater 1 to 280C
                  

                  H0 is my bed heater and H1 is my hot end.

                  I also use a 184C thermal fuse for redundancy.

                  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 1
                  • Wyvernundefined
                    Wyvern
                    last edited by

                    Yeah, that is a concern of mine, there is always power available to the bed should the SSR short closed. A short circuit shouldn't be an issue since it's fused.

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

                      @wyvern Something like this: https://www.be-electronics.com/product_p/ecg8149.htm

                      Z-Bot CoreXY Build | Thingiverse Profile

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                      • TLeTourneauundefined
                        TLeTourneau
                        last edited by

                        Here is the one I use: https://www.amazon.com/gp/product/B07DKD619C/ref=ppx_yo_dt_b_asin_title_o09__o00_s00?ie=UTF8&psc=1

                        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
                        • Wyvernundefined
                          Wyvern
                          last edited by

                          Would taped to the mat suffice? I will probably source a lower temp one around 150C as I don't intend on heating it past 110C or so.

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

                            @wyvern A blob of RTV silicone is a good way to stick it on.

                            Z-Bot CoreXY Build | Thingiverse Profile

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                            • Wyvernundefined
                              Wyvern
                              last edited by

                              Never thought of that! I'm an auto/machine technician so I have tons of that crap.

                              1 Reply Last reply Reply Quote 0
                              • Wyvernundefined
                                Wyvern
                                last edited by

                                Hmm, before I start working on cad files for making my removable mechanical bed probe.

                                Is it possible to say, have the machine home X and Y and ignore Z and wait until you say, click the Z end-stop to start probing?
                                Does the probe always need to do a Z- offset on startup?

                                I really haven't dabbled in bed probing, only used the built in code on my Anycubic delta (and that thing is wonky)

                                I plan on using probing for a bed level map, as the level should almost never change.

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

                                  @wyvern said in Yet another cast aluminum plate topic...:

                                  wait until you say, click the Z end-stop to start probing?

                                  You could add a M291 pop-up prompt with a blocking wait until you click ok or cancel.

                                  @wyvern said in Yet another cast aluminum plate topic...:

                                  Does the probe always need to do a Z- offset on startup?

                                  I don't understand what this means.

                                  Z-Bot CoreXY Build | Thingiverse Profile

                                  Wyvernundefined 1 Reply Last reply Reply Quote 0
                                  • Wyvernundefined
                                    Wyvern @Phaedrux
                                    last edited by

                                    @phaedrux

                                    The Anycubic had to probe Z and store that information before it would perform the bed compensation routine, but I imagine it is only for delta's.

                                    There isn't any need to have this set up right?

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

                                      @wyvern I think I'm having a dense moment. I still don't really understand.

                                      For Delta's you'd have to do an auto delta calibration before printing, but I don't understand that in the context of what you're asking.

                                      Explain it like I'm 5.

                                      Z-Bot CoreXY Build | Thingiverse Profile

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                                      • Wyvernundefined
                                        Wyvern
                                        last edited by Wyvern

                                        Well with me we make 10!

                                        The delta has a removable probe so it saves that data and applies it until it glitches out and forgets.

                                        With that machine it has to probe Z and then it shuts off, you then have to probe and then save.

                                        But that's a crap board, crap firmware.

                                        I'm sure all I need to do is probe, save and apply the map every print.

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

                                          @wyvern said in Yet another cast aluminum plate topic...:

                                          I'm sure all I need to do is probe, save and apply the map every print.

                                          Yeah basically.

                                          https://duet3d.dozuki.com/Wiki/Using_mesh_bed_compensation

                                          Z-Bot CoreXY Build | Thingiverse Profile

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                                          • percarundefined
                                            percar
                                            last edited by

                                            Just another tidbit of information
                                            I have a 300mm x 600mm x12mm cast aluminum plate for my build platform, thinking that this would be quite level and also maintain level during heating...this was a big mistake....the thermal expansion of the aluminium is quite large being .5mm in the 300mm and 1mm on the 600mm. this cast plate was a tooling plate and surface ground initially. the mounting was fixed at one end and allowed to float in the other direction to prevent residual stresses. Even at that the plate warped and you could actually measure the warpage with an indicator during heating. The best level that i could maintain was .2mm. I change to a granite plate and this solved the issue of warping. If your build platform is small you will not run into this issue but if it is bigger than 300mm you will run into issues if you use aluminum.

                                            Wyvernundefined mrehorstdmdundefined 2 Replies Last reply Reply Quote 0
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