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    #- (hash) printer with super simple gantry

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    Example setups and prints
    anti-racking dual roller constraint hash printer
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    • o_lampeundefined
      o_lampe
      last edited by

      More and more test hours for the gantry and it is beginning to show an issue. The dual-dual roller constraint fails sometimes.
      I think, I have to split the Aramid-line into two parts and fix the ends. Which means, I have to disassemble the whole gantry 😢

      Before/after:
      dual_dual-constraint.jpg newRollerConstraint.jpg

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      • o_lampeundefined
        o_lampe
        last edited by

        Just for the record, I have configured bed leveling (G32) and mesh leveling with the mini-IR probe.
        It's blazing fast, the first G30 to set Z=0 always scares me 😱

        o_lampeundefined 1 Reply Last reply Reply Quote 2
        • o_lampeundefined
          o_lampe @o_lampe
          last edited by

          @o_lampe Almost forgot to mention that it runs with the split dual roller constraint now and it never failed yet.

          It's time to add some extruders and print some benchies.

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          • o_lampeundefined
            o_lampe
            last edited by

            It's ALIVE...
            Actually no big things to report here, it just finished the first print. With only a single nozzle and without a fancy mini-Z axis. I just want to see if the two smooth rods are stable enough to carry a direct drive sherpa mini and to gather some experience with the new_to_me pertinax build plate. (feel free to share your findings with yours and PLA, PETG)

            The result reminds me a bit of my first prints on a Prusa i3...there's room for improvement 😉
            2021-10-21 19.54.36.jpg

            Sorry for the blurry pic, it's a screenshot from a short video
            sherpa.jpg

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

              @o_lampe
              I have to add more tie-raps (*), just doubling up the drylin bearings doesn't help much.

              *) can you believe it, German hardware stores are running out off supplies?

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              • oliofundefined
                oliof
                last edited by

                I use 0.5mm FR2 (pertinax) on flex steel sheet, needs a good sanding and then works pretty well and is very resistant to abuse (-;

                <>RatRig V-Minion Fly Super5Pro RRF<> V-Core 3.1 IDEX k*****r <> RatRig V-Minion SKR 2 Marlin<>

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

                  @oliof I skipped the steelplate and placed it directly on selfadhesive ferro-film 1mm.

                  What about bed-temps? I'm at 65C for first layer, but through the thick magnetic sheet the temp drops 5-8 degree (and takes extra pre-heat time of ca. 5min.)

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                  • oliofundefined
                    oliof
                    last edited by

                    No discernible difference compared to PEI sheet at 0.5mm. I know it can take a long time to heat up at higher thickness.

                    <>RatRig V-Minion Fly Super5Pro RRF<> V-Core 3.1 IDEX k*****r <> RatRig V-Minion SKR 2 Marlin<>

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                    • o_lampeundefined
                      o_lampe
                      last edited by

                      @mrehorstdmd calling
                      Everytime I see your sand table videos, I want to build one.
                      Now I think to build a square or round hashTable with 4 steel balls zipping around. They could draw the same mirrored pattern or 4 individual patterns ( two at a time)
                      The main argument to do this, is the lack of slicer and RRF options to run a printer with hash gantry.

                      oliofundefined 1 Reply Last reply Reply Quote 0
                      • oliofundefined
                        oliof @o_lampe
                        last edited by

                        @o_lampe Why do you think RRF couldn't run a hash printer? It looks like a pretty linear relation ship between axis so should be definable with M669 matrix option. While tool changing might be a challenge, 4x copy/2x2mirror mode should be relatively straightforward to setup.

                        <>RatRig V-Minion Fly Super5Pro RRF<> V-Core 3.1 IDEX k*****r <> RatRig V-Minion SKR 2 Marlin<>

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

                          @oliof
                          I've already prooven that the XYUV kinematics work, but a printer needs a perfect first layer and that's the culprit for now.
                          RRF3.5 will have means for individual Z-axis adjustment of heightmap-corrections, but until then I have to find usecases with less critical Z-height. Sand table or laser engraver or feltpen plotter comes to mind.

                          Quad ball sand table is by far the coolest option IMHO.

                          oliofundefined o_lampeundefined 3 Replies Last reply Reply Quote 1
                          • oliofundefined
                            oliof @o_lampe
                            last edited by

                            @o_lampe you could go old school and print with rafts.

                            <>RatRig V-Minion Fly Super5Pro RRF<> V-Core 3.1 IDEX k*****r <> RatRig V-Minion SKR 2 Marlin<>

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

                              @o_lampe said in #- (hash) printer with super simple gantry:

                              @oliof
                              I've already prooven that the XYUV kinematics work, but a printer needs a perfect first layer and that's the culprit for now.
                              RRF3.5 will have means for individual Z-axis adjustment of heightmap-corrections, but until then I have to find usecases with less critical Z-height. Sand table or laser engraver or feltpen plotter comes to mind.

                              Quad ball sand table is by far the coolest option IMHO.

                              Arkanoid style animation would be fun, three balls drawing bricks, that a third one destroys (-:

                              <>RatRig V-Minion Fly Super5Pro RRF<> V-Core 3.1 IDEX k*****r <> RatRig V-Minion SKR 2 Marlin<>

                              o_lampeundefined 2 Replies Last reply Reply Quote 0
                              • o_lampeundefined
                                o_lampe @oliof
                                last edited by

                                @oliof said in #- (hash) printer with super simple gantry:

                                @o_lampe you could go old school and print with rafts.

                                That came to my mind, too. But it takes extra time to print the raft and I'm afraid that even with 4 extruders in copy mode it melts down the otherwise significant time-advantage.

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

                                  @oliof said in #- (hash) printer with super simple gantry:

                                  Arkanoid style animation would be fun, three balls drawing bricks, that a third one destroys (-:

                                  I'd be happy to play TicTacToe, but if you write a meta-code macro for Arcanoid, I'll try it for sure 😬

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                                  • oliofundefined
                                    oliof @o_lampe
                                    last edited by

                                    @o_lampe sure it won't be fast, but proving the concept is the first step to get it optimized. I get your hesitation though, and the world needs more sand tables (-:

                                    <>RatRig V-Minion Fly Super5Pro RRF<> V-Core 3.1 IDEX k*****r <> RatRig V-Minion SKR 2 Marlin<>

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                                    • o_lampeundefined
                                      o_lampe @oliof
                                      last edited by

                                      @oliof
                                      One Arcade classic game would be suitable for a sand table : Tron
                                      Or Snake for single player 🙂

                                      1 Reply Last reply Reply Quote 2
                                      • o_lampeundefined
                                        o_lampe @o_lampe
                                        last edited by

                                        @o_lampe said in #- (hash) printer with super simple gantry:

                                        Quad ball sand table is by far the coolest option IMHO.

                                        I've checked options how to put a sand table on my hash gantry and it seems, I can simply put it on top of the existing printer. Just have to design the tool holders for magnets and some frame adapters. Easy to revert, when serious stuff happens on Slicer or FW side...

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                                        • oliofundefined
                                          oliof
                                          last edited by

                                          @o_lampe any news on your hash printer? It's been a while since you posted an update l and I am curious.

                                          <>RatRig V-Minion Fly Super5Pro RRF<> V-Core 3.1 IDEX k*****r <> RatRig V-Minion SKR 2 Marlin<>

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

                                            @oliof , thanks for asking.
                                            I got a bit distracted by the NeoPixel situation I found in RRF. When I played with other controller options I saw a nice Ocean wave animation, which would perfectly fit the sand table theme.
                                            Last month I bought a CO2 laser, which will engrave acrylic sheets with a wave pattern. Those sheets will be enlighted by the neoPixel wave animation.
                                            Commissioning the laser took a while, it's still not perfect. In the meantime I try to find the best wave pattern for engraving.

                                            //edit I also had the idea to put 4 Laser diodes (or even CO2 tubes) on the hash printer, they are not so critical with Z-height. But the firmware situation regarding multi-beam collaboration is even worse than multi-extruder collaboration.
                                            I will ask the discord channel of the "K40Keller" if they like the idea...they helped me a lot with my K40.

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