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

    Using the RepRapFirmware Configuration Tool

    Scheduled Pinned Locked Moved
    Firmware installation
    4
    32
    5.4k
    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.
    • biscuitladundefined
      biscuitlad
      last edited by

      Ok, the first looks easier for my limited abilities. What value should the in series resistor be?

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

        If you feed them from 5V then I suggest a resistor of around 180 ohms.

        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
        • biscuitladundefined
          biscuitlad
          last edited by

          OK, but R52, R56 and R60 were doing the job previously, maybe I could take a chance with those even though we don't know their value?

          Could I possibly replace the LED on the sensor with one of R52 etc? I've never tried anything like this, so I don't know how take a component out of a board and solder back into place somewhere else. Is it hard?

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

            If the voltage fed to the endstops through the resistors is +15V as implied by the schematic, then the values of R52/56/60 will be too high. OTOH there are several 330 ohm resistors listed in the BOM for that board. Those may well work in place of the LED on the sensor, and if they don't you can solder a second one on top of the first to use two of them in parallel giving 165 ohms.

            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
            • biscuitladundefined
              biscuitlad
              last edited by

              OK, basic tutorial on the process. Heat up soldering iron, place on one side of resistor until it melts and pull off with a pair of tweezers? Never done anything this small before!

              1 Reply Last reply Reply Quote 0
              • Danalundefined
                Danal
                last edited by

                SMT can be de-soldered one end at a time, With patience and a fine tipped soldering iron.

                Using a TINY screwdriver to move it up, wedge it up, just the smallest amount as each end is heated in turn. It won't even look like it is moving because the "other" end is still soldered. Eventually, it will pop loose.

                Re-soldering a new one is relatively easy. One end at a time.

                Andโ€ฆ if you happen to own a "Temperature Controlled" soldering iron (station) already, it may be worth it to you to invest in "Solder Tweezers" that plug into your existing station. Depending on what station you already have, they can be fairly inexpensive. Examples: http://www.ebay.com/bhp/desoldering-tweezers

                Delta / Kossel printer fanatic

                1 Reply Last reply Reply Quote 0
                • biscuitladundefined
                  biscuitlad
                  last edited by

                  Ok, brilliant. I'll have a go. There are several resistors of that type on the old board, so I've got a few chances! Many thanks.

                  1 Reply Last reply Reply Quote 0
                  • biscuitladundefined
                    biscuitlad
                    last edited by

                    My god, my soldering wouldn't win any prizes but the bugger works! Huzzaah! Had to use an old fly tying vice and a gas powered soldering iron on something about a millimetre square was not pretty. ๐Ÿ™‚

                    That was before soldering. Too embarrassed to show you it all afterwards!!

                    Many many thanks for all your help. ๐Ÿ™‚

                    1 Reply Last reply Reply Quote 0
                    • biscuitladundefined
                      biscuitlad
                      last edited by

                      Ok, despite working if I plug it in to a board that's already switched on, when I turn it on from cold the duet now fails to boot.

                      I can disconnect it and it boots fine, connect it and it works fine. Just can't leave it plugged in if I want to bootโ€ฆ

                      I do hope the answer to this isn't soldering another 330ohm resistor on top of that one. :-0

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

                        Check that you used the correct resistor, and that you don't have a solder bridge across the resistor.

                        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
                        • biscuitladundefined
                          biscuitlad
                          last edited by

                          Yes, right resistor (R37). You see the 330 ohm value in the photo. Not sure about the solder bridge.

                          But one other thing, if I boot from just a 5V input (usb), it boots up fine. All the endstops trigger and show hit in the machine properties.
                          โ€“---
                          10 mins later...

                          Mmm, after more testing I'm not quite sure what to think. Could be a weak wifi possibly. I just rebooted with the usb and 15v connected and it's fine and dandy. Repeated it with the usb disconnected and again fails to boot. Plugged it in again and bingo!

                          TBH, if that's all it takes I'll live with that. It's just an OctoPi I use for the camera, so it'll stay on the printer anyway. Be nice to have an explanation though...! ๐Ÿ˜‰

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