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    Clear PLA Issues

    Has anyone encountered any issues related to clear PLA warping off the hotbed when printing? I've tinkered with it all day and every single print other than 1 has done this (printed another using same settings and it warped again).

    I have re-covered my hotbed.
    I've changed nozzle and bed temps.
    Dropped cooling to 80% to slow cooling.
    Slowed speed for initial layer and changed pattern.
    Used brim.

    The only thing I haven't done thus far is pick a window to throw it out of!


    #2
    Hi.. i used to print clear transperent PLA with my MK2 . And no any problems. I dont know how id your models size . Area used !!. Just double chk the bed leveling. Try to turn off the fan for few layers. Make first layer 0.2.
    Let us know the result.
    Regards

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      #3
      Are you heating the bed? and what is the ned covered with?

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        #4
        Originally posted by iDig3DPrinting View Post
        Are you heating the bed? and what is the ned covered with?
        I am indeed, heated to 55c on blue tape.

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          #5
          Use a raft, Brims don't do a whole lot to prevent warping.

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            #6
            Yes bed 55 to 60. Brim will help that. I use pei sheet and other one i used filaprint.

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              #7
              Originally posted by Gallus View Post

              I am indeed, heated to 55c on blue tape.
              You could try increasing the bed temperature slightly. We also use 60C as standard. The other thing to check is what your print fans are doing, you could try reducing the output of these or even turn them off. You will need to experiment with the fans a bit as how well it will work without them will depend on the model complexity ( whether bridging is required) and also size of model (if its very small or there are lots of small layers then you will be printing subsequent layers on soft plastic which does not work very well).

              The other thing is to build an enclosure to reduce drafts and so environmental variability.

              I don't really know why the transparent PLA is hard to print but sometimes you get some plastic and you just have to experiment with different settings (be analytical).
              Last edited by iDig3DPrinting; 06-28-2017, 10:08 AM.

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                #8
                Update*

                Still haven't got it right, now trying a base layer height of 3mm at 205c, 60c bed and 20% fan. The brim is PERFECT but inside still isn't just right (although the best I've had it so far). I know the settings for the rest of my print to come out good so this base is the main focus right now. No idea why the clear stuff is so stubborn.

                Edit* Warped again. Kill me now!

                Gonn try 3mm layer height across the board next to rule out the 2mm main height cooling too fast. This is a puzzle.
                Last edited by Gallus; 06-27-2017, 11:12 PM.

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                  #9
                  Try hairspray on glass or PVA. If the brim is good try looking at your first layer settings. Also, have you printed the same model with the same settings with a different pla?

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                    #10
                    I'm printing on blue tape, I haven't printed the same model per se but I've had no first layer issues using the same parameters with the non clear filament.

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                      #11
                      FINALLY! Upped the bed temp to stay at 60 for the duration, upped flow rate to 115% and slightly eased the cooling. Best result yet, doing another one to confirm.
                      Image IMG 20170628 212759 hosted in imgbb.com

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                        #12
                        Gallus, With the brim being perfect there might be something wrong with the model. You may want to remodel it or find a different source for it. Could be that physical model is 0.05-0.1mm above the actual bed. This happened to me on something I designed. Took forever to find that I had an offset of by flat base a datum face (was actually an old face that I later moved). Something happened when I moved it and it would not print the first layer right. I changed the model back, once I realized it, and everything was fine after that.

                        I still do not see how that would change it, but it did.

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                          #13
                          There is also a possibility it could have been extruder related as my extruder has completely thrown in the towel. Waiting on a revised MK8 coming. I'll what you're saying a go because I have moved them in cura pre print funnily enough.

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