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  • Update about the JG Maker Artist-D (pro)

    I updated this post on 9/13/2021 to represent a more nuanced point of view.

    Folks, I have been working with my JG Maker Artist-D Pro for a while now, and while my experience has been good, the number of reports of people having extruder problems concerns me.

    I continue to believe the Artist-D and Artist-D Pro have good bones. They have a solid foundation; however, the extruder issues are a challenge. From the MKS Robin Control board to the Maxwell Power supply in my Artist-D Pro, the construction and components are excellent, except for the extruder issues.

    I have fully disassembled an extruder and agree the filament feed mechanism needs improvements. In addition, the architecture of the stepper gear and the idler is non-standard and seems to have more issues than other approaches. Therefore at this time, you should expect that depending on your printer, you will have to do some serious work on the extruder to get it to work properly.

    Here is a link to a step-by-step procedure that should help. https://imgur.com/a/kKqG1t2?fbclid=IwAR2PcrkFA5ewtEWKMlAHRC5Ebw4P82chm S5hgiNT8KiAaUhL7Afl1CM04R0

    An alternative would be to upgrade the extruder. However, upgrading the extruder on your own is complex because of ribbon cables and custom breakout boxes that connect the components. The ribbon cable provides for clean cable management but makes using third-party components difficult.

    I gave a lot of thought to this comment before posting since I have previously indicated I recommend the printer for people who like to tinker. I still do, but before you buy, you need to recognize you may have to disassemble the extruder to fine-tune performance.

    As I say at the close of my videos, Let's Learn Something Together.

  • #2
    Irv Shapiro, check out my latest update: https://forum.makewithtech.com/forum...1457#post11457. I am beginning to believe the under extrusion issue can be addressed by changing Flow Rate rather than extruder steps/mm. It worked for me today (tomorrow is another day). I have set both my extruders to 100 steps/mm & adjusted Flow Rate to 144% for the left & 152$ for the right.

    I'm also nearly convinced that the extruder design is actually very good overall. Who knows, maybe the under extrusion using steps/mm may be a firmware issue.
    Last edited by Ender5r; 09-10-2021, 05:30 PM.

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    • #3
      While I think Irv's statements are justified and proper, I believe it might be possible to modify the extruder stepper assembly to achieve better results. I do not (yet) own an Artist D or Pro, so this is totally speculative but I think the slide with it's idler could be modified without too much difficulty to more consistently force the filament against the stepper gear with adequate pressure. Also, I think a steel stepper gear with sharper teeth in place of the current brass one could help.

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      • #4
        Originally posted by akc View Post
        While I think Irv's statements are justified and proper, I believe it might be possible to modify the extruder stepper assembly to achieve better results. I do not (yet) own an Artist D or Pro, so this is totally speculative but I think the slide with it's idler could be modified without too much difficulty to more consistently force the filament against the stepper gear with adequate pressure. Also, I think a steel stepper gear with sharper teeth in place of the current brass one could help.
        From what I discovered today, I don't really think the extruder needs a redesign. And, from your tip, the issue with the nozzles is taken care of, so I think we're ready to go. More & more I suspect a firmware issue is responsible for the extruder steps/mm weirdness. In any case, if Flow Rate taikes care of it, it's not a massive issue.

        Comment


        • akc
          akc commented
          Editing a comment
          I agree that your "fix" does appear to point to a firmware bug and in my opinion it is a major bug.

          And congratulations on finding a workaround for the problem.

        • Ender5r
          Ender5r commented
          Editing a comment
          Yeah. Hence why I said "massive" instead of "minor". I mean, how is it possible that the steps/mm is increased to 900 (agreed, a ridiculous number, but still) and the actual amount of filemant fed actually goes down from when it was 200? But stay tuned to see how my 20x20mm squares turn out tomorrow.

      • #5
        I love this dialog and believe dialogs like these influence the quality of the devices in the consumer 3d printing community. This is exactly the type of dialog I had hoped to promote by sponsoring this forum. Thank you to everyone that is participating.

        My opinions about the Artist-D seem to move around day by day. At a gut level, I really like the printer. At an intellectual level, I am concerned about publishing a positive review for a device that people are having trouble with.

        I want to share that I now have an active dialog with the JG Maker "support team" and they are taking this issue very seriously. They are actively working on a range of upgrades to the Artist-D but I do not know if these will be compatible with existing devices. I do hope so.

        The following post does a very good job of explaining a possible cause for the extruder inconsistencies on some but not all of these prints.

        https://imgur.com/a/kKqG1t2?fbclid=IwAR2PcrkFA5ewtEWKMlAHRC5Ebw4P82chm S5hgiNT8KiAaUhL7Afl1CM04R0

        If the cause of the problem is the plate in the extruder not sliding properly, perhaps because it is slightly oversized, it would explain the inconsistent extrusion. It would also explain why temperature makes a difference since hotter filament might impact the expansion and contractions of the components involved. It would not explain why @Ender5r is able to correct the problem by increasing the flow rate.

        The firmware in the JG Maker is very close to stock Marlin 2.0 using the built-in Marlin 2.0 IDEX support. So my impression is that the problem is more likely a design/manufacturing issue.

        From an engineering point of view, if the tolerances of a component require a very precise manufacturing process it is probably not an optimal design.

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        • #6
          Would you recommend this printer to someone of my skill level, which you are familiar with by now.

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          • #7
            Yes, if you are willing to follow the instructions in the link below and potentially clean up the extruder slide. Alternatively, I think it is likely in the next 3-6 months you may see an improved model from JG Maker.

            Here is a link to a step-by-step procedure that should help. https://imgur.com/a/kKqG1t2?fbclid=IwAR2PcrkFA5ewtEWKMlAHRC5Ebw4P82chm S5hgiNT8KiAaUhL7Afl1CM04R0

            If I recall you have done a number of significant printer repairs so this is definitely in your wheelhouse.

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            • #8
              Thank you for your input. I will definitely be considering it.

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              • #9
                I did something I think I should not have done. I broke down and went out on a limb and bought one of the pro models through Amazon. I joined the JG Maker Artist-D (pro) home page and checked out the price there and Amazon was cheaper. I got an email from Artist-D today giving me points towards future purchases. I do not know what that will afford me. What I have seen and read here, I am not sure I made a good decision on a 3d printer again. It will arrive between 9/30/21 and 10/5/21.
                I have tried to go to the links from imgur.com and all I get is a blank black screen. I use Pale Moon a sub of Firefox that does not accept add ons. Just tried the link on Firefox and it works.

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                • #10
                  My JG Maker Artist-D pro came Wednesday, earlier than expected. It is still lying on the floor in the box with my cat using it as a bed. I have not decided on where to place it. Will have to move something our or around first. I did order some nozzles yesterday that Ender5r referred to as having metal tubing. Used my points that I received for logging onto Artist-D web page. Got an email I have more points.
                  Question: When I set up the printer, should I do the extruder modification to help have an extruder stable flow rate, or has JG Maker started doing the upgrade to solve this problem?

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                  • #11
                    Before disassembling the extruder(s) I would check the current extruder calibration. For me, the most important first thing would be to check for consistency. This seems to be an issue for many people; telling the printer to extrude 100mm multiple times, not changing any settings between extrusions, and getting different results every time. If you get consistency I see no reason to dissassemble.

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