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    Motors for duet 2 wifi

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    Tuning and tweaking
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    • timcurtis67undefined
      timcurtis67 @mendelevium
      last edited by

      @mendelevium I use a ac120 volt silicon pad stuck to the bottom of my bed. It is a 750 watt heater. The heater I run is similar to this one,https://www.amazon.com/approx-KEENOVO-Universal-Flexible-Silicone/dp/B00V81ZI70.

      It heats up quickly. It is powered through an SSR controlled by the duet board.
      If you go that route look into adding a thermal fuse inline to one of the power wires going directly to the bed heater. That way if the SSR ever fails you won't burn you house or business down. SSR's fail in the closed position which will keep your bed heater heating up even if the duet tries to shut it off. They come in different temp settings. Once they blow you have to replace them, as they can't be reset. Good cheap insurance.

      It has a built in thermistor which works fine. If you drill a small hole in the side of your bed plate you can add another thermistor in the small hole and get a better overall temp reading of the bed.

      Also buy a good SSR, not a cheap Chinese knockoff. I've been set up this way for several years on my large printer. It runs almost 24/7 everyday cranking out parts.

      Your printers sound nice, post some pictures when you get them running.

      mendeleviumundefined 1 Reply Last reply Reply Quote 0
      • timcurtis67undefined
        timcurtis67 @droftarts
        last edited by

        @droftarts said in Motors for duet 2 wifi:

        @mendelevium Can you post your config.g, or at least the part that has the motor configuration? I think you're just trying to run the Z axis too fast for the motors, or possibly you have the microstepping set too high. Generally, you do not need to move the Z very fast; F100 is 1.6mm/s, F500 is 8.3mm/s and F1000 is 16.6mm/s, which would be extraordinarily fast for Z! However, it does sound like the existing Z motors are not strong enough for the job.

        Ian

        On larger printers we need faster Z drives. If I home my printer to Z positive (Z +465.00) then start a print it would take over 4 minutes for the table to move up into print position at F100 (1.6mm a second). I typically move my Z at 1200-1500. Works well for Z hops too. I don't add too much time to my prints z hopping during retracts.

        Or maybe I just need more patience 😀 😀

        droftartsundefined 1 Reply Last reply Reply Quote 0
        • droftartsundefined
          droftarts administrators @timcurtis67
          last edited by

          @timcurtis67 That's understandable. But you've probably got something bigger than a 1.2A NEMA 17 driving it!

          Ian

          Bed-slinger - Mini5+ WiFi/1LC | RRP Fisher v1 - D2 WiFi | Polargraph - D2 WiFi | TronXY X5S - 6HC/Roto | CNC router - 6HC | Tractus3D T1250 - D2 Eth

          1 Reply Last reply Reply Quote 0
          • mendeleviumundefined
            mendelevium @droftarts
            last edited by

            @droftarts

            i do not have that in hand now but will post it, however I have not been very clear..
            "Now when I home- if I home at F100, the homing is smooth. Even movement is smooth, however on increasing the feed, like F500, there is noise and the motors vibrate... If I increase the feed like F1000, the motors will simply vibrate and whine and do not move."

            The homing feed is F100.
            What I referred above is the movement of the X and Y axis...
            G1 XXXX F500, there is noise and the motors vibrate... If I increase the feed like F1000, the motors will simply vibrate and whine and do not move

            hope I have explained myself better.

            dc42undefined 1 Reply Last reply Reply Quote 0
            • mendeleviumundefined
              mendelevium @timcurtis67
              last edited by

              @timcurtis67
              What did you do for the heat-bed? Aluminum plate? I am a bit concerned about the possibility of warping with the heat pad under the plate and losing the flatness...

              timcurtis67undefined 1 Reply Last reply Reply Quote 0
              • dc42undefined
                dc42 administrators @mendelevium
                last edited by

                @mendelevium said in Motors for duet 2 wifi:

                If I increase the feed like F1000, the motors will simply vibrate and whine and do not move

                Two likely reasons:

                1. You have set the acceleration too high in the M201 command.

                2. The combination of steps/mm of your machine, motor choice and supply voltage means there is insufficient supply voltage to drive the motor that fast. However, F1000 is a low speed, so that should only be the case if either your machine has a very high steps/mm value, or the motors have high inductance. Use the EMF calculator at https://www.reprapfirmware.org/ to check.

                @mendelevium said in Motors for duet 2 wifi:

                This printer is one of two prototypes I designed and manufactured and spent much time with it. I wish to maybe market in the future.

                Definitely change to 24V power then.

                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 1
                • mendeleviumundefined
                  mendelevium
                  last edited by

                  my extruders/ Water cooling/ hot end ![2_1615555696051_160480591_174566437831827_872159458352239571_n.jpg](Uploading 100%) ![1_1615555696051_160220999_849863792229384_3326401001603109912_n.jpg](Uploading 100%) ![0_1615555696051_160103537_3967567926635363_6334736638490467259_n.jpg](Uploading 100%)

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

                    @mendelevium, unfortunately the uploads attached to your last post failed. If you are using Chrome, try uploading them from Firefox instead - that's what I do when I have this problem [frequently].

                    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
                    • timcurtis67undefined
                      timcurtis67 @mendelevium
                      last edited by

                      @mendelevium said in Motors for duet 2 wifi:

                      @timcurtis67
                      What did you do for the heat-bed? Aluminum plate? I am a bit concerned about the possibility of warping with the heat pad under the plate and losing the flatness...

                      Here is what I use for my bed.
                      https://www.midweststeelsupply.com/store/castaluminumplateatp5

                      It is very stable when heating. I do have it leveled at 70C. I usually run anywhere from 60C-70C while printing. I used the 1/4" thick plate.

                      mendeleviumundefined 1 Reply Last reply Reply Quote 0
                      • mendeleviumundefined
                        mendelevium @timcurtis67
                        last edited by

                        @timcurtis67
                        The heat-bed plate looks great. What thickness did you manage to get. The thinnest I found was 5mm. It will be a bit heavier but with ball-screws it will be more powerful...

                        timcurtis67undefined 1 Reply Last reply Reply Quote 0
                        • mendeleviumundefined
                          mendelevium
                          last edited by

                          160103537_3967567926635363_6334736638490467259_n.jpg

                          160220999_849863792229384_3326401001603109912_n.jpg

                          160480591_174566437831827_872159458352239571_n.jpg

                          Some of the gear on my 3D printers. Everything manufactured in house, including the anodizing This is the Extruder I produced x 3 reduction, the water cooled hot end the water cooler.

                          I will load some more pics with the ball screws

                          mendeleviumundefined 1 Reply Last reply Reply Quote 0
                          • timcurtis67undefined
                            timcurtis67 @mendelevium
                            last edited by

                            @mendelevium said in Motors for duet 2 wifi:

                            @timcurtis67
                            The heat-bed plate looks great. What thickness did you manage to get. The thinnest I found was 5mm. It will be a bit heavier but with ball-screws it will be more powerful...

                            I used a 1/4" thick plate for my build. 18" X 18" X .250"

                            That is a very nice looking extruder. Dual drive for the filament?

                            1 Reply Last reply Reply Quote 1
                            • mendeleviumundefined
                              mendelevium @mendelevium
                              last edited by

                              @mendelevium
                              I have received the steppers 60mm Nema 17 and changed the control for 24V. Runs ok and I am happy with the help you all contributed. Thank You

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

                                @mendelevium, I'm glad it's sorted now! I'll mark this as solved.

                                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 1
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