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    Ender 3 Pro - RRF 2.04 - can't get 12864 LCD to work

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    Duet Hardware and wiring
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    • Phaedruxundefined
      Phaedrux Moderator
      last edited by

      Can you post a photo of the cable orientation just to verify its connected the right way?

      I know it would be a pain but are you able to connect the creality board to test if the display is actually working?

      Z-Bot CoreXY Build | Thingiverse Profile

      ccluckundefined 2 Replies Last reply Reply Quote 0
      • ccluckundefined
        ccluck @Phaedrux
        last edited by

        @Phaedrux , well, I have some challenges uploading photos over this DSL line, but maybe... it'll take me awhile to power up the Creality board, but I'll get started on that. The OEM display worked just fine when I did the big swap, for what its worth. I'll get back to you in a little while. Thanks for your time and attention thus far, and for the guide you wrote. Worked out just fine except for this part.

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        • ccluckundefined
          ccluck
          last edited by

          Well, a quick and dirty power connect to the OEM Creality board brings up a perfectly legible LCD start up screen. Looks just like it used to before we migrated to Duet.

          ccluckundefined 1 Reply Last reply Reply Quote 0
          • ccluckundefined
            ccluck @ccluck
            last edited by

            @ccluck ![alt text](Duet LCD Connect.JPG image url)

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            • ccluckundefined
              ccluck @Phaedrux
              last edited by

              @Phaedrux IMG_2880.JPG

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              • DIY-O-Sphereundefined
                DIY-O-Sphere
                last edited by DIY-O-Sphere

                @ccluck
                Check Step 13
                https://duet3d.dozuki.com/Guide/Ender+3+Pro+and+Duet+Maestro+Guide+Part+1:+Wiring/37?lang=en

                (UTC+1)

                ccluckundefined 1 Reply Last reply Reply Quote 0
                • ccluckundefined
                  ccluck @DIY-O-Sphere
                  last edited by

                  @DIY-O-Sphere , thanks. I'm using the two-ribbon option as described there in the guide.
                  The connectors have been reversed exactly as described and illustrated in steps 13 and 14. I've got three ribbons available, so have alternated their use to (nearly) eliminate the possibility of a bad cable. I think it must be in the software. My reading on this topic indicates that all hookup details were figured out a year or so ago, when RRF 2.02 was the stable version. Any chance that 2.04 is different somehow ?

                  Vetiundefined 1 Reply Last reply Reply Quote 0
                  • ccluckundefined
                    ccluck
                    last edited by

                    In the spirit of science, I've connected the recalcitrant LCD to another Maestro with the same results. Maybe I have the menu files in the wrong place .... they are in the Display Directory, accessible from the Display Editor Tab on the DWC Settings page. Is that correct ?

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                    • Vetiundefined
                      Veti @ccluck
                      last edited by Veti

                      @ccluck said in Ender 3 Pro - RRF 2.04 - can't get 12864 LCD to work:

                      when RRF 2.02 was the stable version. Any chance that 2.04 is different somehow ?

                      there were a lot of changes regarding lcd in 2.03 and 2.04. and the menu files are not compatible with the old firmware.

                      for testing please edit the main file and put this in
                      text R0 C0 F1 T"Test"

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

                        If there are no menu files at all, the screen should display a message. Also it displays "Updating firmware" any time you update the firmware via DWC, or manually using M997.

                        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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                        • PaulHewundefined
                          PaulHew
                          last edited by

                          I have zipped up my working menu structure which is mostly MudCruzrs with some tweaks of my own.
                          Rename the file from a .txt to .zip
                          Extract to a folder and then upload using the upload Menu files in the Display tab.
                          These were working with firmware 2.04 and now rrf3 with DWC 2.07
                          Menufiles.txt

                          HTH
                          Paul.

                          RailCore II - Duet Mini + 1LC, Voron V0.1 - Duet Mini
                          Voron 2.4 disassembled..... Waiting for the RailCore Mini....

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                          • ccluckundefined
                            ccluck
                            last edited by

                            I've tried @Veti 's suggestion - no joy. I commented out everything in the main file and put this at the top : text R0 C0 F1 T"Test"

                            didn't change a thing, darn it

                            working on uploading Paul's menu files now

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                            • dc42undefined
                              dc42 administrators
                              last edited by

                              Have you tried sending M918 P1 from the DWC console or USB?

                              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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                              • ccluckundefined
                                ccluck
                                last edited by

                                Paul's menu files are uploaded to the Display Directory, the Maestro has been rebooted with the E-Stop button, and power cycled.

                                gcode enquiry M918 gives this result :
                                7:26:29 AM M918 12864 display is configured, pulses-per-click is 4

                                still nothing on the LCD, the same bright field - actually, bright pale blue around the periphery, darker rectangle in center made up of little, tiny squares

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

                                  Could it just be that the contrast needs to be adjusted?

                                  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

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

                                    @dc42 , this is the version that doesn't have a trim pot, at least that I can see. The display works perfectly if I plug it into the old Creality board.

                                    There is a very little hole in the back of the board that may be an access hole for some adjustment - I'll take a look now

                                    also, in case you missed it in an earlier post, I've got two recently purchased Maestros doing the same thing - with both the Ender LCD and a RepRap Discount Smart Controller from an old Tevo Tarantula

                                    ccluckundefined 1 Reply Last reply Reply Quote 0
                                    • ccluckundefined
                                      ccluck @ccluck
                                      last edited by

                                      @ccluck well, my memory was faulty - there is no hole on the back at all, so no possibility of any adjustments.

                                      I suppose the next step is to try the one-wire-at-a-time hookup method, pulling from the EXP3 port on the LCD and breaking out the wires to EXP1 and EXP2 on the Maestro. Not sure I have connectors at hand for this and I'm not at all optimistic about the outcome.

                                      It isn't a big deal, really. I just thought it would be nice to turn a knob to babystep instead of using the ipad. I would like to solve the mystery though.

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                                      • dc42undefined
                                        dc42 administrators
                                        last edited by

                                        Are you supplying VIN power to the Maestro? If you are supplying USB power only then the 5V supply will be low, which has a substantial effect on the contrast.

                                        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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                                        • PaulHewundefined
                                          PaulHew
                                          last edited by

                                          In my experience, I had no problems with the Ender3 Pro display. I was using a paneldue but moved this to my RailCore.
                                          Plugged it in as per @Phaedrux instructions, one cable I remember came with the Panel Due and one which came with the Creality BLTouch full kit.

                                          If you have a spare ribbon cable try swapping the multi coloured one.
                                          Also IIRC, there is an arrow on each of the connectors which indicates Pin1.
                                          Make sure that trace cable is the same on both ends and points to the arrow.
                                          IMG_20200125_144901.jpg
                                          In this case the red trace

                                          Paul

                                          RailCore II - Duet Mini + 1LC, Voron V0.1 - Duet Mini
                                          Voron 2.4 disassembled..... Waiting for the RailCore Mini....

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                                          • ccluckundefined
                                            ccluck
                                            last edited by

                                            Paul - I have two ribbon cables exactly like the one you pictured and confirmed that the index trace is at the arrow, both ends.

                                            David - the Ender machine has the Maestro connected to the OEM 24VDC power supply, there isn't anything plugged into the USB port. The Monoprice machine has its Maestro running from a 25A 13.8VDC power supply left over from ham radio days, also nothing in USB port

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