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

    Laser questions

    Scheduled Pinned Locked Moved
    Duet Hardware and wiring
    3
    42
    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.
    • gnatmanundefined
      gnatman
      last edited by

      @dc42:

      It sounds like that gcode file expects the laser to be controlled by the Fan0 output then.

      Correct, which it is.. I've the a 2pin plug in the TTL from the laser to the fan header and it's jumper set to 5v I can control the laser, I can see the plugin works up to a point.

      1 Reply Last reply Reply Quote 0
      • gnatmanundefined
        gnatman
        last edited by

        I still haven't been able to figure this out

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

          Does the gcode file contain duplicated G1 command lines as cgcafer suggested it might?

          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
          • gnatmanundefined
            gnatman
            last edited by

            Here is just a tiny bit of the code

            ; Generated with:
            ; "Raster 2 Laser Gcode generator"
            ; by 305 Engineering
            ;
            ;
            ;
            G21; Set units to millimeters
            G90; Use absolute coordinates
            G92; Coordinate Offset
            G00 X0.0 Y0.0
            M106 S0
            G01 X43.5 Y0.0 F1000
            M107
            G00 X43.5 Y0.1
            M106 S0
            G01 X0.0 Y0.1 F1000
            M107
            G00 X0.0 Y0.2
            M106 S0
            G01 X43.5 Y0.2 F1000
            M107
            G00 X43.5 Y0.3
            M106 S0
            G01 X0.0 Y0.3 F1000
            M107
            G00 X0.0 Y0.4
            M106 S0
            G01 X43.5 Y0.4 F1000
            M107

            I have uploaded the gcode to my google drive if anyone would like to take a look at it.
            https://drive.google.com/open?id=1N1VRtA-BgVCqSdx-f-GF5k92AtwygxuN

            Thanks for your help dc42, next thing to order after april will be my dual nimbles.

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

              1. G92 with no parameters does nothing.

              2. M106 S0 and M107 both turn the fan (or laser on your case) off. So in that snipped of code, the laser will never be on.

              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
              • gnatmanundefined
                gnatman
                last edited by

                Correct in that little bit of code, the laser is off, after playing with it more and using different images. I think it was doing what it did due to the image. I did some searching and found a guy using the same plugin with another board and was getting some really nice results.
                Thanks for your help everyone.

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

                  So do you have it working now?

                  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
                  • gnatmanundefined
                    gnatman
                    last edited by

                    something is still not right, I was running the laser last night, trying different images out via the plugin, noticed the laser wasn't turning off with M107, it's like its getting constant power from something. turned printer off and woke up today, powered the printer and still the laser is on regardless of any command I give it. I thought I was good but I spoke too soon

                    1 Reply Last reply Reply Quote 0
                    • gnatmanundefined
                      gnatman
                      last edited by

                      Im trying to see where the issue is, if I have my fan like this, M106 P0 S0 I0 F500 H-1 Should that header show near 0v at 0% and 5v at 100% given that my jumper is on the 5v pins. because regardless of what I set the fan to, it's always pulling 5v on the header

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

                        That depends on how you are measuring the voltage. If you measure the voltage between the two fan header pins with nothing connected, you should get 0V at S0 and 5V at S1 or S255. However, what I think you are doing is using the Fan- pin from the fan header to feed an on/off control signal to the laser module. In which case, the voltage on that pin relative to ground will be 0V at s1 or S255, and at S0 it will be whatever voltage the laser control input pulls it up to. You may need to add a pullup resistor from that pin to +5V to get a reliable signal level.

                        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
                        • gnatmanundefined
                          gnatman
                          last edited by

                          I was measuring the two fan header pins with nothing connected and was showing near 5v regardless of S0 or S255 this was on the first fan header P0 or whatever it is (not the always on fans) Then I tested the remaining two fan headers and they did work as expected showing near 5v. If I connect the 12v from psu to the laser, it turns on.(sweet) Now if I remove the 12v from psu and connect it to the fan header with 5v jumper set going to laser, I would expect to control it via S0-S255. Which I had working at one point. It worked this way for a little bit but now, no matter what I set the S value to, it doesn't change one bit. No on/off functions. I tried that on the other 2 headers and received the same results. Next if I have 12v going to psu. the fan header going to the TTL header on the module, it will turn the laser on. Though I will not have on/off controls through any of the S values.

                          not sure if the laser control module is toast or what at this point. Because it was working as I expected until I saw it while on, without the neg wire connected.. it came loose from the psu. Don't think that would have caused an issue as it wasn't like that for a long time but who knows

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

                            Without the negative wire connected, the laser may have drawn its power form the fan pin. Depending on how much current it needs, that may have damaged the Fan0 mosfet and/or the laser module.

                            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
                            • gnatmanundefined
                              gnatman
                              last edited by

                              What other tests can I do to find out? Why do the other headers test with the same results? How hard would it be to replace the mofet. Hoping it's not my issue.

                              Man this totally sticks because I bought it from the UK and not filastruder here in the us. I'm sure it wouldn't be warrantied as I did the damage basically

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

                                I suggest you test the fan outputs by connecting a fan to each one in turn, and seeing whether you can control them.

                                Fan MOSFETs can be replaced.

                                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
                                • gnatmanundefined
                                  gnatman
                                  last edited by

                                  I have done that. No control on the fan. I know the fan works as it turns on with the always on header.
                                  Does the MOSFET control the three headers? How comfortable do you have to be to replace the MOSFET? I'm not the best st soldering and don't have that ribbon thing to remove solder. I've got a cheap resolder iron though.
                                  I'd need to see where it's placed on the board

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

                                    Are you saying that none of the controlled fan outputs works? Did you remember to disable thermostatic mode on fan 1?

                                    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
                                    • gnatmanundefined
                                      gnatman
                                      last edited by

                                      Not sure, I'd have to check when I'm home again. I know that's how fan0 is set.
                                      That's h-1 correct? To disable it?

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

                                        Yes H-1 disables thermostatic mode.

                                        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
                                        • gnatmanundefined
                                          gnatman
                                          last edited by

                                          Ok, tested this morning, Fan header P1 and P2 work as they should S0-S255 off/on, sweet thats great news. I noticed when I was moving the fan from one header to P0 the "bed heater current" changes it's currently at 2000c and the heater is off. When I plug in the fan on P0 it fluctuates. I have my hotend thermistor hooked up and it's current is 19.0c currently so I'd expect the bed to be the same and not show differently. I even see a spike on the graph when the fan is connected to the P0 header. so why is my bed thermistor only active when there is a fan connected to it? anyone back to the fan header… P0 does not work under M106 S0-S255. I took some screen shots showing the Bed reading at it's different rates I mentioned but was unable to post them in here?

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

                                            So it's just the fan0 mosfet that is blown.

                                            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
                                            • First post
                                              Last post
                                            Unless otherwise noted, all forum content is licensed under CC-BY-SA