An All Lead Screw 3D Printer You Can Build Yourself

There was a time when the curious hardware hacker  had to build their own 3D printer, because commercial models were so expensive as to be unaffordable except by well-funded institutions. We’re fortunate then to live in an era in which a good quality off-the-shelf machine can be had without breaking the bank, but that is not to say that home-made 3D printers are a thing of the past. Instead the community of rapid prototyping experimenters continue to push the boundaries of the art, and from that we all benefit. An example comes from [Morgan Lowe], whose 3DLS lead screw driven 3D printer joins the freely downloadable designs to be found on Thingiverse.

If at first sight you think it looks a little familiar, you are correct, as it takes its frame design from the popular AM8 metal frame upgrade for the Anet A8 off-the-shelf printer. It draws heavily from other A8 upgrades, and brings in some parts such as the extruder and bed from the Creality Ender3. This is the beauty of incremental open source, and the result is a belt-free printer that does a decent-looking Benchy on the bench, and as a party piece manages to print a slightly more hairy little plastic boat when suspended at 45 degrees by a rope from the ceiling.

When dipping a toe into the world of home made 3D printers it’s interesting to take a look into some of the earlier Hackaday RepRap posts, and see how far we’ve come.

27 thoughts on “An All Lead Screw 3D Printer You Can Build Yourself

  1. This is interesting. I was under the impression, perhaps incorrect that the tooth belt systems had less backlash. The systems that use leadscrews for the Z axis get by with them because the Z axis in general only goes upwards. The X and Y axes are all over the place in a typical print. I also suspect the leadscrews cost more. Still a neat project.

    1. If you look into the build, he uses anti-backlash lead nuts, which contain a lead nut with a follower nut coupled by a (hopefully pretty stiff) compression spring. This forces the two nuts away from each other which preloads the nut in one direction and thus removes the backlash in theory. In practice I don’t know how these compare to belts.

    2. Oh nonono…belts, especially GT2 belts are awful compared to leadscrews. GT2 belts at real printing speeds have all kinds of backlash, and that’s if the user knows how to properly tension the belt. Most printers don’t have properly tensioned belts, nearly skipping teeth the whole time and these are usually the folks claiming they need a 32-bit uP for a zillion microsteps for microns of accuracy. With your printer off, hold your pulley and push your print head and you’ll see 1/8″ slop in most GT2 setups.

      1. This is one reason I made this machine, the other was because I had challenged myself to make a whole printer a year ago then I started modding mine with lead screws and a few people made comments on how impossible it was.

        Challenge accepted.

        Now the 3DLS is my daily driver. It’s been printing every day for 3 months now and has been flawless.

        Challenge won.

    3. Just think about it. All CNC mills use a form of screw be it a lead screw or ball screw.
      And they are all more accurate then a 3D Printer down to 0.001 millimeter .
      I built my own and get less then 0.01 mm tolerance out of it , you just cant get that out of belts

    1. They are using 2mm 4-start leadscrews, so 8mm travel per revolution. So, 40% the speed of a typical 10-tooth GT2 pulley (20 mm / rev). Still quick. Easily capable of 50 mm/s, maybe 100 mm/s with a good driver.

      I would be more worried about wearing out the nuts, since they aren’t using ballscrews.

      1. well, I *may or may not* have used Tr8x2 4 start leadscrews on my z axis with printed nuts…
        I made them out of PETg (which I later on realized is rather too grippy for this stuff) and they worked perfectly, didn’t get any wear after 6 months, and the printer was able to do 85 mm/s with TMC2130’s running at 36V. So, I guess it wouldn’t be that bad. They had zero backlash too

  2. I built a printer using Openbuilds C-Beams a while back (still using it now), and I can print at 100mm/s on a Duet wifi without issue. The biggest issue I found is the noise and maintenance. It’s not quiet, even with Trinamic drivers. Maintenance wise, I think it has more to do with the Openbuilds parts than anything else.

    On the plus side, there’s no backlash and no ringing/ghosting.

  3. So far about 6 months into it’s life everything is still tight and running smooth. I used SuperLube silicone grease on the screws and am running brass ant-backlash nuts. They are 4 start M8 leadscrews with closed loop stepper drivers easily capable of the high RPM needed. I have travel at 150mm/sec and print at 100mm/sec with great results.

    Belts are like rubber bands, no matter what. It’s the nature of them. They are fine for a printer, this was built because I could. I am in the process of making a second one now.

    1. A agree – anti-backlash nuts can work very well in this situation. The brass nuts should be replaceable and outlast the steel screws multiple times over but the anti-backlash design helps extend the life even more.

      So I’m in – have some of this around the shop (actually have a spare SKR 1.4 Turbo), a lot of the rest of the mechanicals that I don’t have around ordered, and other stuff printing as we speak. Looks like a really interesting build.

      1. Awesome! I got 9 full bed prints to do and parts coming from China for my second one now. If you can post a make of yours over on thingiverse please! I’ll also be happy to help there if you have any questions.

        On mine I custom made every cable since I had the tools to do that laying around. This is not required, there’s included wire management too.

      1. Look at the thingiverse link, in my firmware which I setup for it and on youtube.

        It’s accel is set to 300, which is kinda low. It will go much higher but I just haven’t. Max speed is also set to 300.

        https://www.youtube.com/watch?v=TQ1KrQZN0Y0

        120mm/sec print there.

        Remember kids, this is 24V with closed loop stepper control on X and Y. It’s going to move. I’ll set the accel to 3000 and run a print at 150mm/sec here in a minute. Youtube video will be posted

        1. Morgan,
          What do you use for thrust washers on those leadscrews, and where are they, and how do you preload them? It’s not obvious from the video, except that there isn’t one on the Y axis motor end.

          1. It thrusts up against the bearings. In the prints is a small collar and then it uses a stop collar with set screw. Pre-load is just by hand. So long as it’s not loose. This has held up as the bearings are still the very first set from the first experimental build.

            Because the Y has to pass over the frame it thrusts against the front bearing support while the X is all in the motor side.

            Here’s the video of the 150mm/sec print starting, the screenshots and details of the slicer and marlin config are in the description. I had to restart it to change out the bad fan but it’s going now and the timelapse and result will be posted to Youtube as well.

            https://youtu.be/QUFZcTm5FsU

        2. I’ve got a big standard i3 clone and if I run it at 120 mm/s it flies and the print quality is great. Doing a big print now with lots of long straight runs and any fool could see it’s hitting the 100 mm/s it’s set on.

  4. I’ve been sort of designing one to be like the Ultimaker, but I’ve been torn between that and another design using two Y steppers to move a gantry that has the X motor.

        1. 1. They are a easier to mount to 20 and 30 profile.
          2. There are well known companies that make high quality rails.
          4. Rails look cooler.

          There are some other alternatives.

    1. Per the license on Thingiverse it is Creative Commons – Attribution – Non-Commercial licensed.

      This was designed in Solidworks 2019. The Solidworks files are not posted however it is free to modify. I can prove IGES or STEP files for it as well.

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