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Corner LEDs not working

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Smart effector for delta printers
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  • undefined
    dc42 administrators
    last edited by 17 Sept 2017, 16:00

    Look at the LEDs and their soldering first to see if you can spot a problem. If not, try measuring the voltage across each LED when they should be on. If you find one with 12V or 24V across it, that one is open circuit.

    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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    • undefined
      Cinpro
      last edited by 4 Oct 2017, 22:53

      since I was taking things apart on another project I took the time to measure the voltage at the LEDs. I have them reading 0.6 1.1 and 1.5

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      • undefined
        dc42 administrators
        last edited by 5 Oct 2017, 07:31

        I'm guessing that those readings are between the anode of each LED and the negative supply. Is that correct? What supply voltage are you using? The LEDs are designed for a 12V or 24V supply to the hot end fan, depending on the position of the jumper. 5V will not be enough to light them.

        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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        • undefined
          Cinpro
          last edited by 5 Oct 2017, 16:07

          24v supply, I read to the left and right of each LED, I'll see if I can find my alligator clips and read between a fan negative and the LEDS, and update.

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          • undefined
            Cinpro
            last edited by 5 Oct 2017, 16:41

            all are @ 1.5v or less

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            • undefined
              dc42 administrators
              last edited by 5 Oct 2017, 17:18

              I suspect there is a fault in your effector. If you look at the schematic at https://github.com/T3P3/SmartEffector/blob/master/SmartEffector/SmartEffector_v1.3/SmartEffector_Schematic_v1.3.pdf you will see that the three LEDs and resistors R8 and R9 are all connected in series across the hot end fan input terminals. So if the anode of D1 is less than 1.5V relative to H_Fan_- then that suggests to me that R8 or R9 is open circuit, or not soldered properly.

              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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              • undefined
                Cinpro
                last edited by 5 Oct 2017, 18:15

                okay, I will look after this print finishes

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                • undefined
                  DaGWerkz
                  last edited by 6 Oct 2017, 23:18

                  dc42
                  I have same problem. its my fault. can your give me specs on LED so I can order replacement.

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                  • undefined
                    dc42 administrators
                    last edited by 7 Oct 2017, 06:46

                    The part number for the white LEDs is CLM3C-WKW-CWBYA153.

                    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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                    • undefined
                      Cinpro
                      last edited by 7 Oct 2017, 14:47

                      and now this, can't get to printing temp even though it has been working fine other than the LEDs, could the hotend heating up soften the solder enough to do this?

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                      • undefined
                        number40fan
                        last edited by 7 Oct 2017, 16:28

                        The hot end, no. Bad connection, yes.

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                        • undefined
                          dc42 administrators
                          last edited by 7 Oct 2017, 17:07

                          It looks to me that the green plastic housing has slid down, but the metal pins are still exactly where they should be. That should not be a problem, except that if you need to remove the heater wires you will probably find it easier if you push the green plastic part up so that it touches the PCB again.

                          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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                          • undefined
                            Cinpro
                            last edited by 10 Oct 2017, 23:53 10 Oct 2017, 23:49

                            @dc42:

                            I suspect there is a fault in your effector. If you look at the schematic at https://github.com/T3P3/SmartEffector/blob/master/SmartEffector/SmartEffector_v1.3/SmartEffector_Schematic_v1.3.pdf you will see that the three LEDs and resistors R8 and R9 are all connected in series across the hot end fan input terminals. So if the anode of D1 is less than 1.5V relative to H_Fan_- then that suggests to me that R8 or R9 is open circuit, or not soldered properly.

                            sry so late getting back, real life stuff keeps getting in the way of play time, and it comes first.

                            I have 2.1-2.8 from the fan+ when its running to each LED, but none are lighting up

                            also have voltage at D8 and D9

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                            • undefined
                              mfoltz
                              last edited by 30 Nov 2017, 19:45

                              I'm having a similar problem. have traced it down to the r8 and r9 resistors what are the specs on those?

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                                mfoltz
                                last edited by 30 Nov 2017, 21:32

                                if I am reading the schematic right is R9 a 604 ohm .33 watt and R8 a 140 ohm .33 watt? And if so is there any leeway say using a 600 ohm 1/2 watt for R9?

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                                • undefined
                                  dc42 administrators
                                  last edited by 30 Nov 2017, 23:32

                                  The values of those resistors are not critical. But they are unlikely to have failed, unless you ran it with 24V power when you had the 12V jumper installed - in which case R8 would be charred.

                                  Make sure that you have the + and - hot end fan wires from the Duet to the effector the right way round.

                                  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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                                  • undefined
                                    mfoltz
                                    last edited by 1 Dec 2017, 01:25

                                    I know that it is the resistor R9 that is why I am asking. And no I did not connect to 24v I have a totally 12v system. I just need to know what resistor to use to replace R9.

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                                    • undefined
                                      dc42 administrators
                                      last edited by 1 Dec 2017, 08:18

                                      R9 doesn't matter on a 12V system because it it bypassed by the 12V jumper. Have you fitted that jumper?

                                      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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                                      • undefined
                                        mfoltz
                                        last edited by 1 Dec 2017, 15:54

                                        yes. They were working fine. It is to be honest my fault, instead of changing connectors on my fans every time i change them I decided to change the connectors on my effector and while soldering them on I think I overheated the resistors. And then while testing for voltage like you describe above (checking from hot end fan - to leds for voltage the leds would light up and I would read voltage.

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                                        • undefined
                                          mfoltz
                                          last edited by 1 Dec 2017, 15:56

                                          by the way this incident also finally induced me to buy a rework station with temp control and retiring my old radio shack dual wattage soldering iron.

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