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    Duet 2 Maestro StealthChop default

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    • bass4aj
      bass4aj last edited by

      In the docs, it says:

      Snn Set chopper mode: 0 = constant off time, 1 = random off time, 2 = spread cycle, 3 - stealth chop. the Duet 2 Wifi/Ethernet supports modes 0, 1 and 2. The Duet 2 Maestro supports modes 2 and 3. If this parameter is not provided, the default will be used.

      but it does not clarify what "default" is. Is default spread cycle or stealth chop?

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

        The default in recent firmwares is stealthchop. I have found that spread cycle works better at high speeds. You can send M569 Pnn to find the current mode of driver number nn.

        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

        wilriker 1 Reply Last reply Reply Quote 1
        • antlestxp
          antlestxp last edited by

          Does the maestro 2 support hybrid function of the tmc drivers. The ability to use stealthchop 2 below a specified travel speed and spread cycle above that? For example my current printer is set to use stealthchop up to 60 and spread cycle anything above to prevent skipped steps printing at high speed.

          streamliner 1 Reply Last reply Reply Quote 0
          • dc42
            dc42 administrators last edited by

            The firmware doesn't support that mode currently, but we could add it.

            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

            1 Reply Last reply Reply Quote 2
            • bass4aj
              bass4aj last edited by

              That would be really great, since stealthchop loses effectiveness at high speeds, and it would be nice to regain that torque.

              streamliner dc42 3 Replies Last reply Reply Quote 0
              • streamliner
                streamliner @bass4aj last edited by

                @bass4aj I think one of the things @dc42 is indicating here is that when currents are properly tuned, spreadcycle results in better overall prints. Also, when the appropriate current is supplied the noise level is GREATLY reduced as to what testing we've done thus far.

                We should look into dialing in our settings correctly for spreadcycle on the maestro.

                ~DavidH

                1 Reply Last reply Reply Quote 0
                • streamliner
                  streamliner @antlestxp last edited by

                  @antlestxp Would you mind sharing your config and describe the kinematics/overall nature of your printer? I would love to create suitable Spreadcycle settings for the Crane/Promega printer lines.

                  Thanks!

                  DavidH

                  antlestxp 1 Reply Last reply Reply Quote 0
                  • dc42
                    dc42 administrators @bass4aj last edited by

                    @bass4aj said in Duet 2 Maestro StealthChop default:

                    That would be really great, since stealthchop loses effectiveness at high speeds, and it would be nice to regain that torque.

                    This is now on the work list for firmware 2.02.

                    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

                    1 Reply Last reply Reply Quote 0
                    • dc42
                      dc42 administrators @bass4aj last edited by

                      @bass4aj, do you know what value the TPWMTHRS register of the stepper driver is set to in your other system?

                      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

                      1 Reply Last reply Reply Quote 0
                      • wilriker
                        wilriker @dc42 last edited by

                        @dc42 said in Duet 2 Maestro StealthChop default:

                        The default in recent firmwares is stealthchop.

                        I just updated documentation of M350 to resemble this.

                        Manuel
                        Duet 3 6HC (v0.6) with RPi 4B on a custom Cartesian
                        with probably always latest firmware/DWC (incl. betas or self-compiled)
                        My Tool Collection

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

                          @wilriker said in Duet 2 Maestro StealthChop default:

                          @dc42 said in Duet 2 Maestro StealthChop default:

                          The default in recent firmwares is stealthchop.

                          I just updated documentation of M350 to resemble this.

                          I just edited the documentation again, because there is no S parameter on the M350 command. The driver mode is set using the D parameter in the M569 command. I have updated the documentation of M569 to specify the default modes.

                          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

                          1 Reply Last reply Reply Quote 0
                          • bass4aj
                            bass4aj last edited by bass4aj

                            @dc42 not sure. I can check when I get home.

                            1 Reply Last reply Reply Quote 0
                            • antlestxp
                              antlestxp @streamliner last edited by

                              @streamliner what specifically would you like to know. I am currently using a 300x300x300 Hypercube Evo CoreXY. It is running marlin on a mks gen board with tmc2130 drivers. I have a D2M on the way that will replace MKS. Most of my printing is done at or under 60mms so my printer spends most of its time silent. However when printing some PLA's or PETG I use a high travel speed to reduce stringing. If the printer is locked into stealthchop it will at some point loose position during a travel move. It would be nice to see something like the hybrid drive available on the DUET but for the quality, features, and support of the DUET, it's worth not living with the hybrid drive.

                              1 Reply Last reply Reply Quote 0
                              • antlestxp
                                antlestxp last edited by

                                lol looks like I am late to the game. just saw the hybrid system added in the latest RC! Great work guys!

                                1 Reply Last reply Reply Quote 0
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