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    Smart Effector sensor

    Scheduled Pinned Locked Moved
    Tuning and tweaking
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    • A Former User?
      A Former User
      last edited by

      if the difference is the fan then what can affect is voltage drop, vibrations, coupled or inducted noise; isolate what you can and whats left should be the culprit.

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      • Dougal1957undefined
        Dougal1957 @Denis
        last edited by

        @Denis try moving the fan so it sits under one of the other faces of the effector ie you don't want it under the face/side that has all the electronic components on it!

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        • Denisundefined
          Denis
          last edited by

          Separately, I want to note that the molex in the lower part on the thermistor and on the fans is a terrible decision. Replacing a thermistor or fan turns into a headache

          bricorundefined 1 Reply Last reply Reply Quote 0
          • bricorundefined
            bricor @Denis
            last edited by

            @Denis The design of the smart effector has worked well for me. The connections have not been an issue, not sure what you are experiencing.

            IMG_9515.jpg

            IMG_9516.jpg

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            • Denisundefined
              Denis
              last edited by Denis

              It would be more maintainable to make terminal blocks below not only for the heater, but also for fans and a thermistor. Sometimes they have to be changed and then you have two ways - to compress the molex again or to cut and twist the wire. Easier to tighten into the block

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              • Dougal1957undefined
                Dougal1957 @Denis
                last edited by

                @Denis it was designed around the E3D Parts which come with those Molex connector on already and to be honest they are much better than terminal blocks and aren't that expensive to buy new ones (Or get a pin extraction tool and a pack of spare pins)

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                • dc42undefined
                  dc42 administrators @Denis
                  last edited by dc42

                  @Denis said in Smart Effector sensor:

                  I know that everything works without a fan) I wonder why it does not work with it?)

                  The strain gauge produces only a few tens of microvolts output, so varying magnetic fields in the vicinity of the strain gauge amplifier can induce enough voltage to trigger it. Fans generate varying magnetic fields. We designed the Smart Effector around the E3D V6 hot end, and the standard 30mm fan supplied by E3D does not normally cause triggering. In the later version of the Smart Effector, we also moved the connectors around such that you can position the heatsink fan on the opposite side to the strain gauge electronics.

                  Some possible ways to avoid the problem:

                  • Reposition the fan so that it is not so close to the electronics. One user printed a longer duct to move the fan out.
                  • Use a small spacer between the heatsink and the underside of the effector. Make sure there is still enough thread on top of the effector for the nut and the protective fibre washer.
                  • Use a different fan.

                  The print cooling fan isn't a problem, because it doesn't need to be on during probing.

                  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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                  • Denisundefined
                    Denis @dc42
                    last edited by Denis

                    @dc42 thanks. I put a 30mm maglev fan and everything became fine, but another problem appeared) In the previous assembly, the yellow LED on top of it was always on during operation. He blinked randomly. Now it does not burn at all, although the heating is on and everything is printing.
                    By the way, I was looking for information on the network, but I could not find it - what is the error of the strain gauge? I have repeatability of the results within 0.02 mm (but I want to note that I use a klipper, although the board and the effector are a duet)

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                    • dc42undefined
                      dc42 administrators
                      last edited by dc42

                      Smart effector schematics are at https://github.com/T3P3/SmartEffector/tree/master/SmartEffector. I suggest you check the soldering on the LED D4 and the series resistor R6.

                      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

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

                        @dc42 I'll see. what about accuracy?

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                        • dc42undefined
                          dc42 administrators
                          last edited by

                          Repeatability depends mostly on your mechanics. With good mechanics, the best you can hope for is a resolution of a single 1/16 microstep. This will be between 5um and 12.5um depending on your motors and pulleys. When running RRF you should use probe mode 8 which is unfiltered, because that gives the fastest response. I've no idea how Klipper handles probing moves. It may involve an additional latency, depending on whether the host is involved in stopping the move.

                          In RRF it's usual to configure probing 2 or more times until 2 consecutive readings return the same result to within a specified tolerance.

                          When I run a repeatability test of 32 probes with the fan turned off, every reading I get is either 0.003 or -0.002mm, so the repeatability is the expected 0.005mm (i.e. a single 1/16 microstep).

                          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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                          • Denisundefined
                            Denis
                            last edited by

                            Honestly, I don’t know what can be improved in my mechanics. I installed hivin rails and haydn magnetic rods, optical stops.
                            the bed is a plate on the entire area of the delta .. all that comes to mind is to anchor it to the floor)

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

                              Are you using 1.8 or 0.9deg motors?

                              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

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

                                With the nozzle hot and the heatsink fan running, the reproducibility is less good because the first several probed heights are a little higher than the rest. I suspect this is due to filament that has oozed out of the nozzle while the printer was idle, and needs to be squashed flat a few times. So if you probe hot, then it's probably worth doing a few dummy probes at the start of the calibration sequence.

                                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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                                • Denisundefined
                                  Denis @dc42
                                  last edited by

                                  @dc42 0.9 degrees. These are Wantai motors, 2.4A with a fairly low inductance
                                  I did not try this with a 30mm fan, but with the 4010 fan turned off, the repeatability was better. Although accuracy of 0.02 suits me, if only the accuracy of calibration affects only the first layer. If this affects print quality further layers, of course I will fight for better accuracy.

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