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    Configuring S42B Close Loop Stepper Controller

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    • fcwiltundefined
      fcwilt @Adamfilip
      last edited by

      @Adamfilip said in Configuring S42B Close Loop Stepper Controller:

      I am going to add two of the BigtreeTech S42B Closed Loop Stepper motor addons to my Custom CoreXY 3D printer.

      Just out of curiosity why are you going to do that?

      Everything I have read says there is no reason to do so.

      Thanks.

      Frederick

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

      arhiundefined 1 Reply Last reply Reply Quote 0
      • Adamfilipundefined
        Adamfilip
        last edited by

        I run into issue with occasional layer shifts that I havent been able to resolve.
        so im trying this.

        1 Reply Last reply Reply Quote 1
        • arhiundefined
          arhi @fcwilt
          last edited by

          @fcwilt said in Configuring S42B Close Loop Stepper Controller:

          Everything I have read says there is no reason to do so.

          I found bunch of "tests" showing they are not precise (moire patterns worse then bad motors on microstepping) but I found also ppl saying they are awesome and that all their artifacts are now gone... so I ordered 4 drivers (only drivers no motors), attached to my own motors and now am thinking about good test jig to test how accurate they are ... will see if I'll attach some super high precision encoders or go another way about them.. but in any way more ppl testing them the better, the hal sensor precision is not bad and the software is not that hard to write for that so in theory they should be very good... (so far I just turned them on and I don't like the sound I hear but let's see if I manage to make some test during NY holidays)

          1 Reply Last reply Reply Quote 1
          • Adamfilipundefined
            Adamfilip
            last edited by

            Had someone with Electronics experience help me figure out how to connect them.
            hope this is right lol

            Attachment_1609376543.jpg

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

              You will damage the expansion breakout board with the driver connected like that. Disconnect the driver 5V common pin from all 3 pins on the breakout board. Connect it to 5V+ on one of the servo connectors on the breakout board instead.

              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 1
              • Adamfilipundefined
                Adamfilip
                last edited by

                Servo connectors? Do you mean the 5v+ on the Two Heater6&7 areas?

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

                  @Adamfilip said in Configuring S42B Close Loop Stepper Controller:

                  Servo connectors? Do you mean the 5v+ on the Two Heater6&7 areas?

                  Yes.

                  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

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                  • Adamfilipundefined
                    Adamfilip
                    last edited by

                    Here is a revised diagram

                    S42B-Diagram-v2.jpg

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                    • dc42undefined
                      dc42 administrators
                      last edited by

                      Still not right:

                      • Leave the breakout board Step+, Dir+ and Enable+ not connected to anything (and not connected to each other)
                      • Connect +5V from the breakout board to COM on your driver

                      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
                      • Adamfilipundefined
                        Adamfilip
                        last edited by

                        Ok so your suggesting like this

                        S42B-Diagram-v3.jpg

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                        • arhiundefined
                          arhi
                          last edited by

                          @Adamfilip said in Configuring S42B Close Loop Stepper Controller:

                          BigtreeTech S42B Closed

                          Is this working for you ?!

                          I'm doing the simplest thing possible

                          DIR -> GND
                          EN -> GND
                          GND -> GND
                          VM -> 12V
                          5V -> 5V
                          STEP -> 0-5V gpio

                          and darn thing won't move ?!?! loosing my hair for 2 days already

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                          • alankilianundefined
                            alankilian
                            last edited by alankilian

                            @arhi said in Configuring S42B Close Loop Stepper Controller:

                            EN -> GND

                            I don't mean to be Captain Obvious, but do you have the system configured for enable=low?

                            It looks like it can be set to either.

                            Also, do you have both power supply grounds connected together and to GND on the servo?

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

                            arhiundefined 1 Reply Last reply Reply Quote 0
                            • Adamfilipundefined
                              Adamfilip
                              last edited by Adamfilip

                              I have just wired up my S42B and Motors

                              After i changed settings, I do calibrated and it started working

                              This is my current settings for it,

                              M569 P5 R0 S0 T3.33:3.33:5:0                                      ; physical drive 0 goes backwards previously P0, p5 is on expansion board
                              M569 P8 R0 S0 T3.33:3.33:5:0                                  ; physical drive 1 goes backwarsa previously P1, p8 is on expansion board
                              M569 P2 S0                                       ; Z physical drive 2 goes backwards
                              M569 P3 S1                                       ; Extruder physical drive 3 goes Forwards
                              M584 X5 Y8 Z2 E3                                 ; set drive mapping , old X0 Y1 
                              M350 X16 Y16 Z32 I0                              ; configure microstepping without interpolation, previously 32
                              M350 E16 I1                                      ; configure microstepping with interpolation
                              M92 X100 Y100 Z1593 E409             ; set steps per mm
                              M566 X600 Y600 Z20 E800 ; Set maximum instantaneous speed changes (mm/min) JERK
                              M203 X9000 Y9000 Z1500 E10000 ; Set maximum speeds (mm/min)
                              M201 X1000 Y1000 Z250 E5000 ; Set accelerations (mm/s^2)
                              M906 X1400 Y1400 Z1500 E1300 I30 ; Set motor currents (mA) and motor idle factor in per cent
                              M84 S30 ; Set idle timeout
                              M572 D0 S0.0125 ; Pressure Advance 
                              
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                              • Adamfilipundefined
                                Adamfilip
                                last edited by

                                Woohoo Got it working. check out demo
                                https://youtu.be/Qz6EoinibEc

                                Phaedruxundefined fcwiltundefined CNCModellerundefined 3 Replies Last reply Reply Quote 1
                                • Phaedruxundefined
                                  Phaedrux Moderator @Adamfilip
                                  last edited by

                                  @Adamfilip Very cool. Thanks for sharing. Let us know how it works out in practice.

                                  Z-Bot CoreXY Build | Thingiverse Profile

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                                  • arhiundefined
                                    arhi @alankilian
                                    last edited by

                                    @alankilian said in Configuring S42B Close Loop Stepper Controller:

                                    I don't mean to be Captain Obvious, but do you have the system configured for enable=low?

                                    tried both !Enable and Enable configuration for the good measure, no help

                                    Also, do you have both power supply grounds connected together and to GND on the servo?

                                    yes

                                    Also tried 1234 dip's as 1111 (default, first two are what I understand microstepping, third is open/closed control and fourth is write enable for calibration), 1100, 1101, 0000, 0011, 0001 ... no change

                                    at one point I got it to "turn" but was going into "error" after few steps but most of the time it just won't turn at all ... wasted too much time with it I'll try a second driver and a second motor to be sure but I'm moving with my testing to other systems 😞 I think this one was just not meant to be

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

                                      @Adamfilip said in Configuring S42B Close Loop Stepper Controller:

                                      Woohoo Got it working. check out demo
                                      https://youtu.be/Qz6EoinibEc

                                      In real world printing what conditions would correspond to displacing the position with your thumb as you did in your video?

                                      Thanks.

                                      Frederick

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

                                      Adamfilipundefined 1 Reply Last reply Reply Quote 0
                                      • Adamfilipundefined
                                        Adamfilip @fcwilt
                                        last edited by

                                        @fcwilt none this was as test to see if it would return back to position. this is to help recover from layer shifts.
                                        if nozzle gets snagged on something.. its an issue that has been a problem for me and I havent found another mechanical reason to resolve it.

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

                                          @Adamfilip said in Configuring S42B Close Loop Stepper Controller:

                                          if nozzle gets snagged on something.. its an issue that has been a problem for me and I havent found another mechanical reason to resolve it.

                                          I've seen the nozzle get snagged on bits of the previous layer sticking up, most always in the area of the gap created by holes the are being made in a vertical section of the object.

                                          It would be interesting to see how these devices would behave when that happened.

                                          I may have to try closed-loop.

                                          Thanks.

                                          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
                                          • Adamfilipundefined
                                            Adamfilip
                                            last edited by

                                            Im still trying to resolve some glitches and reached out to BIGTREETECH for support.

                                            Sometime its working fine and sometimes they are not responding at all.. and sometimes they will vibrate very strongly. perhaps its a magnet issue..I think im going to crazy glue the magnet onto the stepper motor shaft.

                                            Massoundefined 1 Reply Last reply Reply Quote 1
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