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    RailCore II corexy

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    My Duet controlled machine
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    • kraegarundefined
      kraegar
      last edited by

      SeeMeCNC has given us a dedicated sub-forum for the RailCore II, we'll be using it to post FAQ's etc.

      As major updates are made, I'll continue to update this post as well.

      The new forum is here: http://forum.seemecnc.com/viewforum.php?f=116

      Co-Creator of the RailcoreII CoreXY printer
      https://www.thingiverse.com/thing:2407174

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      • kraegarundefined
        kraegar
        last edited by

        Co-Creator of the RailcoreII CoreXY printer
        https://www.thingiverse.com/thing:2407174

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        • dc42undefined
          dc42 administrators
          last edited by

          I'm please to see that you have a forum; but please do keep us updated here as well.

          Duet WiFi hardware designer and firmware engineer
          Please do not ask me for Duet support via PM or email, use the forum
          http://www.escher3d.com, https://miscsolutions.wordpress.com

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          • kraegarundefined
            kraegar
            last edited by

            I absolutely will, David.

            Thought you might enjoy that pic I just posted. New bottom panel, Should be implementing it tonight!

            Edit: Ok, was more than a one night project due to some minor miscalculations. Those responsible have been sacked.

            Co-Creator of the RailcoreII CoreXY printer
            https://www.thingiverse.com/thing:2407174

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            • kraegarundefined
              kraegar
              last edited by

              Z bed leveling using 3 independent Z-steppers / leadscrews has now been implemented and tested, to actually level the bed in Z. Thanks to David for implementing this in firmware - it's one of the coolest features to use.

              There's some minor refinement to do with the system, but so far it's working very very well.

              Once the final few tweaks have been made, we'll publish the BOM for this - is will be an option to the build, not a requirement. It will require a duex2 or duex5, a third Z tower (using Tr8*4 leadscrews for all 3 z towers) and an alteration to the Z-Yokes, bed carrier, and bottom panel.

              Here are the results from one of my runs of leveling today.

              Leadscrew adjustments made: -0.106 -0.088 0.102, points used 3, deviation before 0.062 after 0.000
              Leadscrew adjustments made: -0.076 -0.003 0.014, points used 3, deviation before 0.034 after 0.000
              Leadscrew adjustments made: -0.036 -0.003 0.015, points used 3, deviation before 0.016 after 0.000
              Leadscrew adjustments made: -0.010 -0.002 0.016, points used 3, deviation before 0.007 after 0.000

              Co-Creator of the RailcoreII CoreXY printer
              https://www.thingiverse.com/thing:2407174

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              • biscuitladundefined
                biscuitlad
                last edited by

                So this gives you automated physical levelling before each print, without the software adjustments you typically get via mesh levelling with a probe?

                The question is whether that is actually a better system or not? It's fairly hefty cost upgrade instead of doing it all in software via the probe.

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                • kraegarundefined
                  kraegar
                  last edited by

                  This gives you physical 3 point leveling in place of using thumbscrews, etc to manually level the bed. If your bed isn't actually planar, then a grid probe can make up for that.

                  Using thumbscrews and a sheet of paper under the nozzle I'd typically get within about 0.1mm across the 250mm bed, maybe a bit better. Took ~5 minutes, was a bit tedious. I'd only have to do it every few weeks to once a month. For big prints, I'd do a grid probe.

                  With this new version, my bed is flat enough, I shouldn't need a grid probe. 3 rounds takes under 2 minutes, and gets me under 0.05 across the bed, down to under 0.01. So it is more accurate than I ever was.

                  It's definitely something to weigh out with cost vs. convenience. If you want absolutely smooth first layers every time, though, this will do it.

                  Co-Creator of the RailcoreII CoreXY printer
                  https://www.thingiverse.com/thing:2407174

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                  • dc42undefined
                    dc42 administrators
                    last edited by

                    @kraegar:

                    Using thumbscrews and a sheet of paper under the nozzle I'd typically get within about 0.1mm across the 250mm bed, maybe a bit better. Took ~5 minutes, was a bit tedious.

                    The same code that does the automatic levelling when you have multiple independently-driven Z motors can also tell you how much to adjust the thumbscrews if you don't. See https://duet3d.com/wiki/Using_the_manual_bed_levelling_assistant.

                    Duet WiFi hardware designer and firmware engineer
                    Please do not ask me for Duet support via PM or email, use the forum
                    http://www.escher3d.com, https://miscsolutions.wordpress.com

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                    • kraegarundefined
                      kraegar
                      last edited by

                      That's a handy feature, David! Thanks!

                      Co-Creator of the RailcoreII CoreXY printer
                      https://www.thingiverse.com/thing:2407174

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                      • kraegarundefined
                        kraegar
                        last edited by

                        We're going to simplify the bed on the ZL option, get rid of the carriers altogether. Gains another 15mm or so of Z height. New bed design has been turned over to 713maker and will be tested soon.

                        Co-Creator of the RailcoreII CoreXY printer
                        https://www.thingiverse.com/thing:2407174

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                        • kraegarundefined
                          kraegar
                          last edited by

                          Today we're putting the Z-Leveling (ZL) option of the RailCore II 300ZL out as a "beta" release.

                          There are now 4 options / builds out:
                          RailCore II (250^3 standard build) http://a360.co/2z30VXH
                          RailCore IIZL (250x250x275, with auto Z leveling) http://a360.co/2DoeHFu
                          RailCore II 300 (300^3 standard build) http://a360.co/2BZLzTA
                          RailCore II 300ZL (300x300x325 with auto Z leveling) http://a360.co/2D5OryV

                          The BOM for the 250 verions are here: https://docs.google.com/spreadsheets/d/1KvlSNYHE20HYjQlURdH50Pn_V7t8TfuNNLnhcvI4Nos/edit?usp=sharing

                          The BOM for the 300 versions are here: https://docs.google.com/spreadsheets/d/1ePSq-bL4-4rGUdbzkxtMmNftXPYwv5IH47edacloU4E/edit?usp=sharing

                          The assembly guide for the 250 standard version is here: https://docs.google.com/document/d/1wBlwMw_H73dxT0H4OD7fWI7y6bFSvh7_BoBPMTmdTZs/edit?usp=sharing

                          The printed parts for all of them are identical, and still available at the original thingiverse link (with parts from the ZL link on thingiverse as needed)

                          I'll have my RailCore IIZL at MRRF coming up this month if anyone wants to stop by and check it out!

                          Co-Creator of the RailcoreII CoreXY printer
                          https://www.thingiverse.com/thing:2407174

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                          • T3P3Tonyundefined
                            T3P3Tony administrators
                            last edited by

                            Thanks for the update, I am really looking forward to MRRF and will be sure to stop by!

                            www.duet3d.com

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                            • kraegarundefined
                              kraegar
                              last edited by

                              I'm psyched you'll be at MRRF, looking forward to chatting!

                              Co-Creator of the RailcoreII CoreXY printer
                              https://www.thingiverse.com/thing:2407174

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                              • kraegarundefined
                                kraegar
                                last edited by

                                Oh, and I'm a local. So if you need any info, etc, hit me up!

                                Co-Creator of the RailcoreII CoreXY printer
                                https://www.thingiverse.com/thing:2407174

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                                • kraegarundefined
                                  kraegar
                                  last edited by

                                  The first revision of the RailCore IIZL assembly guide (250mm, with z-leveling) is done, and available here: https://docs.google.com/document/d/1OoXfw7aXMz0NzAxkdwuChC0FpunLRyKI02_1vJF52hk/edit#

                                  I'll have the assembly guides for the 300 & 300ZL soon (probably tomorrow)

                                  Co-Creator of the RailcoreII CoreXY printer
                                  https://www.thingiverse.com/thing:2407174

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                                  • JohnOCFIIundefined
                                    JohnOCFII
                                    last edited by

                                    Great documentation. I'll be sure to stop by at MRRF.

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                                    • kraegarundefined
                                      kraegar
                                      last edited by

                                      Documentation for building the 300mm^3 versions of the RailCore are now available:

                                      RailCore II 300: https://docs.google.com/document/d/1hC_S6MeUwHMQ6U9vivJ6D1Olx1hfcOVcvL2W0NaXD28/edit?usp=sharing
                                      RailCore II 300 ZL: https://docs.google.com/document/d/19FuTYfwqgOkGO8SUScnSuhS_Gx8mJMmXLiPgBfGeJ-s/edit?usp=sharing

                                      Co-Creator of the RailcoreII CoreXY printer
                                      https://www.thingiverse.com/thing:2407174

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                                      • T3P3Tonyundefined
                                        T3P3Tony administrators
                                        last edited by

                                        Excellent! Thanks, look forward to catching up at MRRF

                                        www.duet3d.com

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                                        • kraegarundefined
                                          kraegar
                                          last edited by

                                          One of my sample prints for MRRF. Testing layer heights. This one is 0.02mm

                                          Co-Creator of the RailcoreII CoreXY printer
                                          https://www.thingiverse.com/thing:2407174

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                                          • kraegarundefined
                                            kraegar
                                            last edited by

                                            Had a great time at MRRF doing prints like the one above (I printed a couple pins, 0.05 first layer, 0.02 for the rest. 413 layers in a print just over 8mm tall) Really enjoyed meeting Tony from duet3d and getting talk with him. He's extremely nice, and super smart. Had great talks with pretty close to everyone I interacted with.

                                            Here's a sample check of my auto-level after bringing my printer home. This is after intentionally spinning the leadscrews to demo auto-leveling all weekend, carrying the printer around, etc. Who needs mesh leveling? lol 🙂

                                            (I think I could clean it up a bit more if I took some time to clean the bed, double check nothing shifted with the rails, ran another round of leveling, etc, but this will do)

                                            Co-Creator of the RailcoreII CoreXY printer
                                            https://www.thingiverse.com/thing:2407174

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