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    Servo Configuration Check

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    • alankilianundefined
      alankilian @JRCL
      last edited by

      @jrcl

      I can't tell if that's isolated or not.

      If you've got everything else figured out, try connecting the two grounds together at the converter.

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

      fcwiltundefined 1 Reply Last reply Reply Quote 0
      • fcwiltundefined
        fcwilt @alankilian
        last edited by

        @alankilian said in Servo Configuration Check:

        @jrcl

        I can't tell if that's isolated or not.

        If you've got everything else figured out, try connecting the two grounds together at the converter.

        Without knowing how the unit is designed that might be unwise.

        Frederick

        Printers: a E3D MS/TC setup and a RatRig Hybrid. Using Duet 3 hardware running 3.4.6

        JRCLundefined alankilianundefined 2 Replies Last reply Reply Quote 0
        • JRCLundefined
          JRCL @fcwilt
          last edited by

          @fcwilt Agreed, it's a buck converter if that makes any difference, but it does seem like that would allow the full power load to pass through the Duex and potentially fry the rail. Ordering the recommended MG995, from the servo wiki, to test against at least for now.

          fcwiltundefined 1 Reply Last reply Reply Quote 0
          • fcwiltundefined
            fcwilt @JRCL
            last edited by

            @jrcl said in Servo Configuration Check:

            @fcwilt Agreed, it's a buck converter if that makes any difference, but it does seem like that would allow the full power load to pass through the Duex and potentially fry the rail. Ordering the recommended MG995, from the servo wiki, to test against at least for now.

            It could be fine, it could be destructive - without word from the manufacturer you just don't know.

            Since it seems you have no test equipment even the lack of destruction would not insure it was actually working - it might just shutdown if wired incorrectly.

            I went ahead and ordered one. I should be able to determine if the output is isolated. If so you would need to connect the grounds together. I will let you know what I find.

            Frederick

            Printers: a E3D MS/TC setup and a RatRig Hybrid. Using Duet 3 hardware running 3.4.6

            JRCLundefined 1 Reply Last reply Reply Quote 1
            • JRCLundefined
              JRCL @fcwilt
              last edited by

              @fcwilt You're too kind, appreciate the above and beyond support on this

              fcwiltundefined 1 Reply Last reply Reply Quote 0
              • fcwiltundefined
                fcwilt @JRCL
                last edited by

                @jrcl said in Servo Configuration Check:

                @fcwilt You're too kind, appreciate the above and beyond support on this

                Glad to be of help when I can.

                Frederick

                Printers: a E3D MS/TC setup and a RatRig Hybrid. Using Duet 3 hardware running 3.4.6

                1 Reply Last reply Reply Quote 0
                • alankilianundefined
                  alankilian @fcwilt
                  last edited by

                  @fcwilt said in Servo Configuration Check:

                  @alankilian said in Servo Configuration Check:

                  @jrcl

                  I can't tell if that's isolated or not.

                  If you've got everything else figured out, try connecting the two grounds together at the converter.

                  Without knowing how the unit is designed that might be unwise.

                  @JRCL
                  It's perfectly safe to connect the grounds together on an isolated-output converter.
                  It just makes it into a nonisolated converter.

                  Ref: (A poor reference, but nonetheless) https://electronics.stackexchange.com/questions/35800/should-i-isolate-grounds-of-an-isolated-dc-dc-converter

                  https://electronics.stackexchange.com/questions/181088/connecting-grounds-when-using-an-isolated-dc-dc-converter

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

                  JRCLundefined 1 Reply Last reply Reply Quote 0
                  • JRCLundefined
                    JRCL @alankilian
                    last edited by

                    @alankilian ohhhh I see I thought you meant to use the onboard ground but positive off the converter. I will give this a try then. Redoing all the wiring on the servo too to be safe too

                    alankilianundefined 1 Reply Last reply Reply Quote 0
                    • alankilianundefined
                      alankilian @JRCL
                      last edited by

                      @jrcl It's just a lart-ditch effort.

                      A US$10 converter is almost certainly not isolated, so I don't think this is your problem, but sometimes when you have verified everything else is right, you've got to try something.

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

                      JRCLundefined 1 Reply Last reply Reply Quote 0
                      • JRCLundefined
                        JRCL @alankilian
                        last edited by

                        @alankilian Agreed! Worth the attempt, but alas it didn't fix the problem.

                        fcwiltundefined 1 Reply Last reply Reply Quote 0
                        • fcwiltundefined
                          fcwilt @JRCL
                          last edited by

                          @jrcl said in Servo Configuration Check:

                          @alankilian Agreed! Worth the attempt, but alas it didn't fix the problem.

                          It may be the signal from the Duet is not compatible. I can measure the signal and tell you about it. Perhaps you can determine if it is/is not compatible with your servo.

                          Frederick

                          Printers: a E3D MS/TC setup and a RatRig Hybrid. Using Duet 3 hardware running 3.4.6

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

                            @jrcl said in Servo Configuration Check:

                            @phaedrux Are they not grouped like this? I figured it was just a naming convention for the pin (E3_PWM) went with the PWM number (PWM2) and I saw this on the pin name table too and thought I still called C"duex.pwm2" though the control pin is called E3_PWM

                            e7b3ea11-3108-45de-8af5-3b33086f9f8d-image.png
                            2606dcdd-c578-49a6-b5bd-0d4798f527dd-image.png

                            Yes you're right. Sorry about that. Not enough coffee.

                            Z-Bot CoreXY Build | Thingiverse Profile

                            1 Reply Last reply Reply Quote 2
                            • JRCLundefined
                              JRCL
                              last edited by

                              Just an aside. Got in my MG995S servo and swapped it out and was rewarded with immediate success. Still interested in hearing your findings on the higher torque servo signal @fcwilt

                              fcwiltundefined 1 Reply Last reply Reply Quote 1
                              • fcwiltundefined
                                fcwilt @JRCL
                                last edited by

                                @jrcl said in Servo Configuration Check:

                                Just an aside. Got in my MG995S servo and swapped it out and was rewarded with immediate success. Still interested in hearing your findings on the higher torque servo signal @fcwilt

                                Could you post a link to the servo that is not working for you?

                                Thanks.

                                Frederick

                                Printers: a E3D MS/TC setup and a RatRig Hybrid. Using Duet 3 hardware running 3.4.6

                                JRCLundefined 1 Reply Last reply Reply Quote 1
                                • JRCLundefined
                                  JRCL @fcwilt
                                  last edited by

                                  @fcwilt

                                  https://www.amazon.com/Youleke-Torque-Digital-Servo,Waterproof-Horn(270°)/dp/B08739MGPL/ref=sr_1_4?crid=HHSQAXOVWT74&keywords=BETU+2Pack+25KG+High+Torque+RC+Servo&qid=1650928661&s=toys-and-games&sprefix=betu+2pack+25kg+high+torque+rc+servo%2Ctoys-and-games%2C73&sr=1-4

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