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    Duet3D 1HCL - Closed Loop Controller Beta test

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    • A Former User?
      A Former User @samlogan87
      last edited by A Former User

      @samlogan87
      really? the motors can drive faster?

      since two years I´m working with 3d printers and duet and I never heard about it. haha

      Is there a good summary from Duet?

      Today is "1HCL-Monday". !!!!

      cheers richard

      dc42undefined 1 Reply Last reply Reply Quote 0
      • dc42undefined
        dc42 administrators @A Former User
        last edited by

        @gruna-studio driving stepper motors at the desired current depends on having enough driver supply voltage to overcome the back EMF of the motors, which increases with speed. It's especially important with high inductance and high current motors. You can estimate the voltage needed using the calculator at https://www.reprapfirmware.org/emf.html.

        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

        A Former User? 3 Replies Last reply Reply Quote 0
        • A Former User?
          A Former User @dc42
          last edited by

          @dc42
          ok thanks a lot!

          1 Reply Last reply Reply Quote 0
          • A Former User?
            A Former User @dc42
            last edited by

            @dc42
            any good news?

            😄

            1 Reply Last reply Reply Quote 0
            • samlogan87undefined
              samlogan87
              last edited by

              @gruna-studio i know. I am hanging out for them. I have money burning a hole in my pocket

              Custom Core-XY

              1 Reply Last reply Reply Quote 0
              • A Former User?
                A Former User @dc42
                last edited by

                @dc42
                Hey any good news?
                Cheers
                Richard

                T3P3Tonyundefined 1 Reply Last reply Reply Quote 0
                • T3P3Tonyundefined
                  T3P3Tony administrators @A Former User
                  last edited by

                  @gruna-studio yes! finally over the bottle neck. drop me a line tony@duet3d.com as you have been waiting a while so we may be able to supply directly from next week (before we can get any to our resellers). also @samlogan87

                  Note support for these is still experimental in RRF 3.4

                  www.duet3d.com

                  A Former User? 1 Reply Last reply Reply Quote 0
                  • A Former User?
                    A Former User @T3P3Tony
                    last edited by

                    @t3p3tony

                    yeeeeah!
                    thanks a lot.

                    So there is the first question.
                    Is there any experience with specific encoders I could use?

                    f300a153-a5d4-49da-a5a1-31cdbaf9707d-image.png

                    Is this an actual information?

                    If there is no picture yet, I can provide you some good ones and other documentations.

                    Thanks a lot
                    Richard

                    T3P3Tonyundefined dc42undefined 2 Replies Last reply Reply Quote 0
                    • samlogan87undefined
                      samlogan87
                      last edited by

                      @T3P3Tony awesome. Sent you an email regarding getting some boards

                      Custom Core-XY

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                      • T3P3Tonyundefined
                        T3P3Tony administrators @A Former User
                        last edited by

                        @gruna-studio the SPI connected encoders are not yet fully supported. we have done some limited testing but for now I recommend using quadrature encoders.

                        www.duet3d.com

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                        • dc42undefined
                          dc42 administrators @A Former User
                          last edited by dc42

                          @gruna-studio the encoders we have had most success with are the 1000 PPR (4000 CPR) ones built-into some 1.8deg stepper motors. There are some examples at https://www.omc-stepperonline.com/closed-loop-stepper-motor/.

                          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

                          A Former User? 1 Reply Last reply Reply Quote 0
                          • A Former User?
                            A Former User @dc42
                            last edited by

                            @dc42

                            OK... nice to know. Can´t wait to install it. 🙂

                            My X-axis works with an double shaft nema 17 who has belts on both ends. So I can´t ( at the moment) install the a new motor. How about the encoder of stepper online. I guess they´re quiet similar to the build in encoder.. or am I completly wrong?
                            May it´s a cheaper solution to upgrade specific axis.

                            https://www.omc-stepperonline.com/encoder/

                            This encoder would fit nicely in my system but I`m not sure if this is working in the same way as the built in encoder of stepper online nemas.

                            cheers Richard

                            https://www.omc-stepperonline.com/download/HKT30-32.pdf
                            56870398-1ff5-41dc-ae6c-101f6e3ee781-image.png

                            alankilianundefined 1 Reply Last reply Reply Quote 0
                            • alankilianundefined
                              alankilian @A Former User
                              last edited by alankilian

                              @gruna-studio Can you find some place that verifies you can get a 4,000 counts-per-revolution encoder? I looked at their web page and data sheet and I don't get a solid feeling that's true, but it might be true.

                              I see CPR and LinesPerRev/PulsesPerRev (LPR/PPR) used incorrectly all the time.

                              If you can only get a 1000 CPR encoder that's going to be too low a resolution to get you good performance. If the data sheet says CPR but they really mean LPR than it's OK, but without buying and testing one you won't know.

                              SeemeCNC Rostock Max V3 converted to V3.2 with a Duet2 Ethernet Firmware 3.2 and SE300

                              A Former User? dc42undefined 2 Replies Last reply Reply Quote 0
                              • A Former User?
                                A Former User @alankilian
                                last edited by

                                @alankilian https://www.rls.si/eng/products/rotary-magnetic-encoders

                                But I´m no really sure with the configurations there.
                                Share it if you do one if you want.

                                I think they have all we need in future.

                                Concerning the stepper online encoder. I think I´ll ask them and let you know.

                                Cheers
                                Richard

                                1 Reply Last reply Reply Quote 0
                                • dc42undefined
                                  dc42 administrators @alankilian
                                  last edited by dc42

                                  @alankilian a 1000 PPR (pulses-per-rev) quadrature encoder provides 4000 CPR (counts per rev, better called transitions per rev). The EXP1HCL board uses all 4000 transitions. The 4 transitions that occur in the time of 1 pulse probably won't be as evenly spaced as the pulses, but using them still provides a benefit over using just the pulse count.

                                  @gruna-studio if the encoder spec is 1000 PPR (not 1000 CPR) then the resolution should be OK. We've only tried one system using a separate encoder (not from stepperonline) and we've had poor results; but that may be caused by something else on that machine. If you do use a separate encoder, you need to make sure there is no added backlash in the encoder caused by it being separate from the motor. So the mounting of the encoder on the shaft and the encoder body on the motor need to be rigid. As long as the EXP1HCL is in beta test and not a fully released product, we'd rather you use stepper motors with integrated encoders, so that we can be fairly sure that any issues you report are not caused by poor coupling of the motor to the encoder.

                                  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

                                  A Former User? 2 Replies Last reply Reply Quote 0
                                  • A Former User?
                                    A Former User @dc42
                                    last edited by

                                    This post is deleted!
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                                    • A Former User?
                                      A Former User @dc42
                                      last edited by

                                      @dc42
                                      I just got my boards! thanks a lot to providing me in this early stage. 😄
                                      I saw there are some changes to the version 0.3. Is there already a wiring diagramm?
                                      cheers
                                      Richard

                                      dc42undefined 1 Reply Last reply Reply Quote 0
                                      • dc42undefined
                                        dc42 administrators @A Former User
                                        last edited by dc42

                                        @gruna-studio latest EXP1HCL documentation is at https://docs.duet3d.com/en/Duet3D_hardware/Duet_3_family/Duet_3_Expansion_1HCL.

                                        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

                                        Alex.crundefined 1 Reply Last reply Reply Quote 0
                                        • Alex.crundefined
                                          Alex.cr @dc42
                                          last edited by

                                          @dc42 @T3P3Tony

                                          Any idea when 1HCL will be available to US resellers?

                                          Voron2.4/Duet3 SBC+6HC+3HC+1LC+1HCL(x2) - Delta/Duet2 Wifi - CubePro/Duet2 Wifi+Duex5 - Laser/Duet3 Mini5+ - Cel Robox - U̶p̶3̶0̶0̶+/D̶u̶e̶t̶3̶ ̶6̶H̶C̶+̶LC1̶ - F̶T̶-̶5̶/̶D̶u̶e̶t̶2̶ ̶W̶i̶f̶i̶ - S̶o̶l̶i̶d̶o̶o̶d̶l̶e̶

                                          T3P3Tonyundefined 1 Reply Last reply Reply Quote 0
                                          • T3P3Tonyundefined
                                            T3P3Tony administrators @Alex.cr
                                            last edited by

                                            @alex-cr we have orders in from at least Filastruder (need to check with the other ones). I hope we will start shipping reseller orders to them next week.

                                            www.duet3d.com

                                            Alex.crundefined cloudseedsundefined 2 Replies Last reply Reply Quote 2
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