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    nozzle wipe

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    • arhiundefined
      arhi
      last edited by arhi

      actually turned it around so that the "bend" of the .5mm silicone is what i brush on .. stiff enough so I can go both directions 😄 ... this is great 🙂

      if !move.axes[0].homed || !move.axes[1].homed 
        echo "X and Y axes not homed, aborting the wipe"
        M99
      
      if state.currentTool < 0
        echo "No tool loaded, aborting the wipe"
        M99
      
      if heat.heaters[tools[state.currentTool].heaters[0]].current < 200
        echo "Extruder too cold, no point wiping, aborting the wipe"
        M99
      
      ; Drop all motor currents down
      M400
      M913 X30 Y30 Z25
      
      ; relative extruder move
      M83 
      
      ; X-135, Y100 
      ; X-120, Y60
      
      G0 X-110 Y40  F9000
      G0 X-135 Y40  F9000
      G0 X-135 Y100 F9000 
      
      while true
        G0 X-135 Y{100 - iterations * 3} F9000 
        G0 X-115 Y{100 - iterations * 5} F6000
        if iterations == 6
          G1 E-3 F3000
        if iterations == 8
          break
      
      ; go to park position
      G0 X-135 Y40  F9000
      
      ; Return all motor currents to 100%
      M400
      M913 X100 Y100 Z100
      

      What I just figured out is that I have this ~1cm of space on the left side of the bed for the whole Y length and that it would be way smarter to use a stiff piece (like @deckingman made taht milled channel) of 1x1cm square "rod" and attach it to front left and back left frame so I have stiff wiper along the whole depth of the printer... need to figure out how to do it, none of my CNC machines have working range of 30cm, maybe do it in 2 passes or just pay someone to do it for me after things go back to normal. Anyhow, this works, yeeey 🙂 and this new programable g-code is awesome 🙂

      deckingmanundefined 1 Reply Last reply Reply Quote 0
      • deckingmanundefined
        deckingman @arhi
        last edited by

        @arhi For info, I'm currently working on a better "bucket". What I mean by that is with a mixing hot end, I sometimes have to purge as well as wipe. That purged plastic has to be collected, otherwise it would end up getting onto the belt that drives the lead screws. My current "bucket" is too shallow and I have to empty it more often than I would like.

        Ian
        https://somei3deas.wordpress.com/
        https://www.youtube.com/@deckingman

        timcurtis67undefined 1 Reply Last reply Reply Quote 1
        • timcurtis67undefined
          timcurtis67 @deckingman
          last edited by

          @deckingman said in nozzle wipe:

          @arhi For info, I'm currently working on a better "bucket". What I mean by that is with a mixing hot end, I sometimes have to purge as well as wipe. That purged plastic has to be collected, otherwise it would end up getting onto the belt that drives the lead screws. My current "bucket" is too shallow and I have to empty it more often than I would like.

          Conditional g code on the horizon.... If bucket.purge == full then empty. 😁 😁

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

            @mwolter said in nozzle wipe:

            There might be a cleaner way but couldn't think of one without a modulus or "is even" operator.

            There is a mod(a,b) function but I forgot to document it at https://duet3d.dozuki.com/Wiki/GCode_Meta_Commands#Section_Functions. I'll fix that 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

            arhiundefined 1 Reply Last reply Reply Quote 1
            • arhiundefined
              arhi @dc42
              last edited by

              @dc42 said in nozzle wipe:

              There is a mod(a,b) function but I forgot to document it at https://duet3d.dozuki.com/Wiki/GCode_Meta_Commands#Section_Functions. I'll fix that now.

              great 🙂

              how come you skipped the % operator?

              1 Reply Last reply Reply Quote 0
              • mwolterundefined
                mwolter
                last edited by mwolter

                Simplified the conditional script a little with the use of mod (thanks @dc42) and added comments. Might help those interested in learning conditional gcode.

                Overview: The code below moves the nozzle to the right and left of the nozzle wiper blade. Each move also moves the nozzle forward 2mm. Mod is short for modulus and returns the remainder. For instance, mod(10,4) returns 5. 10 / 4 = 2.5 or .5

                G1 X-12 Y332 F24000                                     ; rapid to inital point outside the wipe strip
                while true                                              ; continually run everything within this while loop
                	if mod(iterations,2) = 0                        ; if iterations is an even number
                		G1 X-4 Y{332 - iterations * 2} F1200    ; move to right side of wiper and forward 2 * iterations 
                	else                                            ; if the if condition above is not met
                		G1 X-12 Y{332 - iterations * 2}         ; move to left side of wiper and forward 2 * iterations 
                	if iterations = 6                               ; if this is the seventh time running the while loop (0 is always the first iteration)
                		break                                   ; exit the while loop  
                
                1 Reply Last reply Reply Quote 1
                • deckingmanundefined
                  deckingman
                  last edited by

                  For completeness, here is my non-conditional gcode nozzle wipe macro........

                  G90; set to absolute coordinates
                  G1 X50 Y363 F12000; move quickly to rear left
                  G1 X80 Y352 F900; slowly right 30, forward 11
                  G1 X110 Y363; slowly right another 30 and back 11
                  G1 X140 Y352; slowly right another 30 and forward 11
                  G1 X170 Y363; back and right

                  Ian
                  https://somei3deas.wordpress.com/
                  https://www.youtube.com/@deckingman

                  arhiundefined 1 Reply Last reply Reply Quote 1
                  • arhiundefined
                    arhi
                    last edited by

                    Looking at the video how efficient @deckingman cleanup is I think we'r moving nozzle over the silicone this many times just 'cause it's easy in the loop and not 'cause it's needed :D. It's fun for sure.

                    1 Reply Last reply Reply Quote 1
                    • arhiundefined
                      arhi @deckingman
                      last edited by

                      @deckingman question, does these look like your stripe?

                      https://www.aliexpress.com/item/10000000975575.html
                      https://www.aliexpress.com/item/32953108608.html
                      https://www.aliexpress.com/item/32947574656.html

                      They are silicone stripe in different dimensions but "high temperature resistant silicone rubber foam sealing strips". The "foam" part is weird never seen silicone foam. Will this maybe be too soft? Looking at your video, your stripe seem to be rather hard

                      deckingmanundefined 2 Replies Last reply Reply Quote 0
                      • deckingmanundefined
                        deckingman @arhi
                        last edited by deckingman

                        @arhi That stuff looks a bit spongy. Definitely not like the stuff I used.

                        EdIt ....but it might work - dunno.

                        Ian
                        https://somei3deas.wordpress.com/
                        https://www.youtube.com/@deckingman

                        1 Reply Last reply Reply Quote 1
                        • deckingmanundefined
                          deckingman @arhi
                          last edited by deckingman

                          @arhi I can't be sure but the stuff I used was more like this https://www.ebay.co.uk/itm/SOLID-SILICONE-RUBBER-STRIPS-3MMTHK-X-5MTRS-LONG-WHITE-60-SHORE-FDA-GRADE/331230136018?hash=item4d1edac6d2ⓂmM0icdmB-aIKG93gQRG6wvw. The listing is for 3mm thick (which is what I think I used), but the picture looks like 1mm thick. But it's definitely "solid".

                          Ian
                          https://somei3deas.wordpress.com/
                          https://www.youtube.com/@deckingman

                          deckingmanundefined 1 Reply Last reply Reply Quote 1
                          • deckingmanundefined
                            deckingman @deckingman
                            last edited by

                            This is what I have. The picture is a bit out of focus but it's solid and about 3mm x 10mm.

                            S2190002.JPG

                            Ian
                            https://somei3deas.wordpress.com/
                            https://www.youtube.com/@deckingman

                            1 Reply Last reply Reply Quote 1
                            • arhiundefined
                              arhi
                              last edited by

                              @deckingman thanks, I was afraid of that "sponge" part too .. both looks spongy and title say sponge 😄 .. from what I see it is insulation strip so it's expected to be pressed between something I think...

                              deckingmanundefined 1 Reply Last reply Reply Quote 0
                              • deckingmanundefined
                                deckingman @arhi
                                last edited by

                                @arhi It might still work. Or to put it another way, I do know the solid stuff works, the spongy stuff might work but I don't know for sure if it will.

                                Ian
                                https://somei3deas.wordpress.com/
                                https://www.youtube.com/@deckingman

                                1 Reply Last reply Reply Quote 0
                                • mwolterundefined
                                  mwolter
                                  last edited by

                                  Here's what I've been using with success. Tested the silicone blade and 250c nozzle temps didn't affect it. Also tried a soldering iron at 350c and it couldn't touch it. Should be safe with the temperatures I plan to use for ABS, PC and Nylon.

                                  Screen Shot 2020-04-30 at 7.30.30 AM.jpg
                                  Link to Product
                                  https://www.amazon.com/gp/product/B000BQU0CQ/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1

                                  IMG_3050.jpeg

                                  The blade itself is about 2.2mm wide, has a flat edge on one side and a round key on the other. Total height is about 20mm and it's 200mm long. Enough to do several printers.

                                  Screen Shot 2020-04-30 at 7.28.08 AM.jpg
                                  The blade is easily mounted and prevented from sliding out by a wall on the opposite side. Macro starts on the side closest to the camera and zig-zags away.

                                  1 Reply Last reply Reply Quote 1
                                  • arhiundefined
                                    arhi
                                    last edited by arhi

                                    I tried one blade and it didn't hold up on 200C 😞
                                    I ordered some of that spongy things + I found solid one too so ordered that too we'll see when/if arrives... found something super cool now amongst baby things need to test for temp might be a win ... another kitchen utencil, found between baby things ... temp. resistent 😄

                                    7a623c76-40e2-470d-9627-81e09fa07b6a-image.png

                                    zaptaundefined 1 Reply Last reply Reply Quote 0
                                    • zaptaundefined
                                      zapta @arhi
                                      last edited by

                                      @arhi said in nozzle wipe:

                                      I tried one blade and it didn't hold up on 200C

                                      This one should sustain high temperature. It is used to hold hot solder iron tips.

                                      https://www.tequipment.net/Metcal/AC-CP2/Soldering-Accessories/?Source=googleshopping

                                      The one I have is 2.3mm in thickness and the square portion is 75mm x 75. It's a rubbery thing.

                                      arhiundefined 1 Reply Last reply Reply Quote 0
                                      • arhiundefined
                                        arhi @zapta
                                        last edited by

                                        @zapta ha, I have exactly the same thing that I got with my PACE ages ago, you are supposed to use it to grab your hot tip to replace with another one 😄 but it's very soft, it's like the stuff I already have in the wiper right now. This "cup" will work great till I get the long strips, it is much stiffer, and when long strips arrive cup will be cool to hold the bits of plastic 😄

                                        1 Reply Last reply Reply Quote 0
                                        • Nuramoriundefined
                                          Nuramori
                                          last edited by

                                          One thing I did was collect all the old and torn silicone socks I had lying around and made a wipe. B97DC44A-85D2-417D-94F8-8FA5677E1E6A.jpeg

                                          I just sliced off the sides and kept the face, then alternated them with washers. Used RTV on the bottom to bind them.

                                          zaptaundefined 1 Reply Last reply Reply Quote 3
                                          • zaptaundefined
                                            zapta @Nuramori
                                            last edited by

                                            Stumbled upon this one while searching for a silicon work mat.

                                            E.g. the 50x50x20mm.

                                            https://www.aliexpress.com/item/4000765138240.html

                                            1 Reply Last reply Reply Quote 1
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