Duet3D Logo Duet3D
    • Tags
    • Documentation
    • Order
    • Register
    • Login

    Requested speed is not reached

    Scheduled Pinned Locked Moved
    General Discussion
    6
    75
    6.2k
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • Vetiundefined
      Veti
      last edited by

      see
      https://duet3d.dozuki.com/Wiki/Choosing_and_connecting_stepper_motors

      So the usual practice is to set the motor current to no more than about 85% of the rated current. Therefore, to get maximum torque out of your motors without overheating them,

      also

      Duet 2 WiFi and Duet 2 Ethernet (maximum motor current 2.4A) => Stepper motor rated current <= 3.0A

      1 Reply Last reply Reply Quote 2
      • PuddingBaer91undefined
        PuddingBaer91
        last edited by PuddingBaer91

        Okay Data seems to be wrong on the Website. My Motor ist labeled with 2.5A

        https://photos.app.goo.gl/CSqKTi9TxJZBSTX27

        Should i ran the Motors near 85% ? 2A?

        1 Reply Last reply Reply Quote 0
        • Vetiundefined
          Veti
          last edited by

          @puddingbaer91 said in Requested speed is not reached:

          Should i ran the Motors near 85% ? 2A

          yes

          1 Reply Last reply Reply Quote 1
          • PuddingBaer91undefined
            PuddingBaer91
            last edited by

            Thank you i will try and Report. But can't Imagine that this causes the Problem because the Motors are already very Strong at 1.3 ampere...

            1 Reply Last reply Reply Quote 0
            • PuddingBaer91undefined
              PuddingBaer91
              last edited by

              tried with 2100mA but even with pa=0.1 the same sound but now only at high speed when printing infill. While printing slower the sound is now silent. Tomorrow i will try another stepper for extruder drive and report results

              1 Reply Last reply Reply Quote 0
              • PuddingBaer91undefined
                PuddingBaer91
                last edited by PuddingBaer91

                okay also with another stepper (original from TronXY) i get the same sounds 😞 Only reducing jerk to 600 will result in good sound

                deckingmanundefined 1 Reply Last reply Reply Quote 0
                • deckingmanundefined
                  deckingman @PuddingBaer91
                  last edited by deckingman

                  @puddingbaer91 I say again that none of my 5 Bondtech BMGs make that noise. You said above that "there should be nothing loose" but have you actually taken it apart and checked?

                  Edit. The only reason why reducing "jerk" helps the sound is that it effectively reduces pressure advance so either don't use pressure advance at all or fix the problem with the extruder.

                  Ian
                  https://somei3deas.wordpress.com/
                  https://www.youtube.com/@deckingman

                  1 Reply Last reply Reply Quote 0
                  • PuddingBaer91undefined
                    PuddingBaer91
                    last edited by PuddingBaer91

                    Could you please Share a Video of your running Extruder? I de assemled my bondtech 100 Times also because switching Stepper Motor it seems all perfekt. Also the other Extruder (ultimaker Clone) Made These Sounds...it also makes this Sound with pressure advance = 0.1

                    Edit: i bought a bondtech BMG Clone to Check If Mine was faulty...

                    deckingmanundefined 1 Reply Last reply Reply Quote 0
                    • deckingmanundefined
                      deckingman @PuddingBaer91
                      last edited by

                      @puddingbaer91 said in Requested speed is not reached:

                      Could you please Share a Video of your running Extruder? I de assemled my bondtech 100 Times also because switching Stepper Motor it seems all perfekt. Also the other Extruder (ultimaker Clone) Made These Sounds...it also makes this Sound with pressure advance = 0.1

                      Edit: i bought a bondtech BMG Clone to Check If Mine was faulty...

                      Taken just a few minutes ago and uploaded to my google drive folder.

                      https://drive.google.com/file/d/1oEaL72FOPDlCzU3uTm2UajcCdYBtXVWL/view?usp=sharing

                      Ian
                      https://somei3deas.wordpress.com/
                      https://www.youtube.com/@deckingman

                      1 Reply Last reply Reply Quote 1
                      • PuddingBaer91undefined
                        PuddingBaer91
                        last edited by PuddingBaer91

                        thank you this is what i expect from my extruder 🐶

                        May i found the problem:

                        https://photos.app.goo.gl/Krb1Pd1MatLy46S57

                        look closely to the metal gears. I tightened the screw to max and loosen it till it is possible to move the plastic gear (just a little bit. As you can see the spring is on block (compressed fully). The gears are slipping 😤 if i loosen the srew much more this will also happen. I think this is not normal or what do you think?

                        1 Reply Last reply Reply Quote 0
                        • Vetiundefined
                          Veti
                          last edited by

                          have you tightened the grub screw on the gear with the white gear?

                          1 Reply Last reply Reply Quote 1
                          • PuddingBaer91undefined
                            PuddingBaer91
                            last edited by

                            yes checked that. Here is also a video with cover (second bearing) mounted.

                            https://photos.app.goo.gl/PoWPArpmCjFiu4kH7

                            metal gears still slipping

                            deckingmanundefined 1 Reply Last reply Reply Quote 1
                            • Vetiundefined
                              Veti
                              last edited by

                              take the one with the white gear apart and post a picture of the shaft and the grub screw.

                              1 Reply Last reply Reply Quote 1
                              • deckingmanundefined
                                deckingman @PuddingBaer91
                                last edited by deckingman

                                @puddingbaer91 AFAIK that white gear is a press fit onto the shaft and it looks like it might be slipping. Take it apart and clamp the shaft firmly, then see if you can move that gear. It's likely to get worse the longer you print because of the heat conduction from the motor which will soften the plastic and /or make it expand more than the shaft. If that is the case, then you could try a it of epoxy adhesive or contact Bondtech and see if you can get new gear/shaft assembly (but make sure that is the problem first).

                                Edit - looks like we weer both typing at the same time.

                                Ian
                                https://somei3deas.wordpress.com/
                                https://www.youtube.com/@deckingman

                                1 Reply Last reply Reply Quote 0
                                • PuddingBaer91undefined
                                  PuddingBaer91
                                  last edited by

                                  Commando Back, talked with bondtech Support and they told me it is designed for using with Filament loaded. Then they doesn't Slip. Reassemled and If i Turn the White Gear fast Back and forth by hand with Filament loaded There ist absolutely No Bad Sound. So i will try it again. If it is Not better i will do a Print without bondtech Extruder to Gear only Extruder stepper

                                  1 Reply Last reply Reply Quote 1
                                  • Vetiundefined
                                    Veti
                                    last edited by

                                    the white gear and and bondtech gear should never turn separately, even if there is no filament loaded.

                                    1 Reply Last reply Reply Quote 0
                                    • PuddingBaer91undefined
                                      PuddingBaer91
                                      last edited by PuddingBaer91

                                      i tried again but the same sound. So i unmounted the bondtech bmg and printed without it. The sound comes from the motor because it is skipping steps or something other is wrong with them.

                                      If i hold the motor shaft while printing lines without big speed changes i can't fix the shaft by hand. While fast and often print speed changes (infill) i easily can fix the motor shaft by hand also can turn the shaft in each direction by hand in spite of motor is working.

                                      I tried 3 motors (ACT, original tronxy and original e3d pencake) but all three acting the same. Also lowered the current of xyz to 800mA and let the extruder at 85% current but no change (may it's a little harder to fix the shaft)

                                      Do you know whats going wrong here?

                                      It's a 12V system with 360W power supply

                                      deckingmanundefined 1 Reply Last reply Reply Quote 0
                                      • deckingmanundefined
                                        deckingman @PuddingBaer91
                                        last edited by

                                        @puddingbaer91 If you run M122 while it's printing, what is the reported voltage?

                                        Ian
                                        https://somei3deas.wordpress.com/
                                        https://www.youtube.com/@deckingman

                                        1 Reply Last reply Reply Quote 0
                                        • PuddingBaer91undefined
                                          PuddingBaer91
                                          last edited by

                                          @deckingman said in Requested speed is not reached:

                                          M122

                                          Supply voltage: min 11.7, current 11.8, max 11.9, under voltage events: 0, over voltage events: 0, power good: yes

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

                                            Do you have any other motors to test with?

                                            Z-Bot CoreXY Build | Thingiverse Profile

                                            1 Reply Last reply Reply Quote 0
                                            • First post
                                              Last post
                                            Unless otherwise noted, all forum content is licensed under CC-BY-SA