September 23, 2020
reprap 3d printer

The 5 Best RepRap 3D Printers You Can Build At Home 2020

Back in the early 2000s, 3D printers were elephant-sized behemoths that cost tens of thousands of dollars. Now, FDM 3D printer giants like Ultimaker and Makerbot, and low cost 3D printer manufacturers like Flashforge exist — because of one sector-defining innovation. That was the RepRap 3D printer movement.

What is a RepRap 3D Printer? And What Does RepRap Mean?

RepRap is short for “replicating rapid prototyper” — aka a self-replicating 3D printer.

A RepRap 3D printer is one designed in line with the RepRap ethos: 3D printers that can self-replicate and print parts to make more RepRap 3D printers. These new RepRap printers can then print more RepRap printers, and so on.

The RepRap movement has done more to democratize 3D printing than any other single factor. RepRap 3D printers preempted the first DIY 3D printer kits, with these open source 3D printers encouraging tinkering and innovation, advancing the technology.

An early RepRap printing extra RepRap parts. Source:
NameMax Build Volume (mm)PriceWhere to buy for the best price?Alternative Purchase Option
Creality Ender 3 Pro220 x 220 x 250$268Gearbest hereAmazon here
Anet A8220 x 220 x 240$179Gearbest hereAmazon here
Creality CR-10 V2300 x 300 x 400$499+Amazon hereGearbest here
FLSUN QQ-S255 x 255 x 360$380Amazon here
Prusa i3 MK3S250 x 210 x 200$999Prusa store

History of the RepRap movement and RepRap 3D Printing

The RepRap movement was founded by Dr Adrian Bowyer, then a Senior Lecturer at the University of Bath, during 2004 and 2005. He was awarded an MBE by Queen Elizabeth II in 2019 for his services to 3D printing.

The first RepRap 3D printer invented by Dr Bowyer was the RepRap Dawin, named after Charles Darwin who first theorized evolution. You could build one for a few hundred dollars if you got the plastic parts printed and then bought the electronics.

These were the first ever low cost 3D printers; 3D printer kits you could build yourself. What was previously inaccessible became possible for anyone to have at home if you had enough tech know-how.

And if you were given the plastic parts 3D printed by a friend or someone else, you were morally obliged to print more plastic parts for anyone else who wanted a RepRap. That way, the RepRap movement could spread exponentially, with more printers in service to help others make their own 3D printers.

The first RepRap 3D printer — RepRap Darwin

It was basic, it looked like it was from the 80s, but it worked. It worked for $200 while other 3D printers costed $10,000+. This spurred on the open source 3D printing revolution that has led us to the cutting-edge FDM 3D printers we have today.

first reprap 3d printer darwin by adrian bowyer history of the reprap movement
Named after Charles Darwin, this is the 3D printer that really kickstarted the RepRap movement.

The Darwin plays an important part in the history of 3D printing, and allowed people to now 3D print from home provided they had the technological know-how. It wasn’t pretty and it doesn’t hold up against the far superior RepRap 3D printers that are about today, but in 2008 the Darwin was a big deal, and is looked back upon fondly today.

dr adrian bowyer with his reprap 3d printer and another it helped print
Dr Bowyer’s RepRap printer with its “child”, another RepRap 3D printer it printed the plastic parts for.

If you’re interested in finding out more about the history of 3D printing, click here.

Best RepRap 3D Printer: The Criteria

Judging these printers was different to how we usually rank our printers. This is because many printers that were revolutionary in their time have since been outclassed by newer and more powerful machines.  We therefore graded these RepRap printers on:

  • Price-performance ratio: does it perform well for the price?
  • Versatility: can it print many materials?
  • Reliability
  • Must be a RepRap printer or inspired by the RepRap movement.

5. Creality Ender 3 Pro

Creality 3D printers are known for their simplicity to assemble, and the Ender 3 Pro is a great example of that. Creality say that you can completely assemble it from package to print-ready in 10 mins using 20 screws, though for new makers this is likely to be quite optimistic.

Featuring a high quality extruder means the Ender 3 Pro is less likely to have filament clogging during printing, and Creality have upgraded a number of key areas in the Pro version of the Ender 3. These include an upgraded power supply, improvements to the bed leveling, and a new print bed system to prevent warping and make finished prints easier to remove.

Experienced makers know that the Ender 3 Pro is absolutely up there with the best low cost RepRap kits. It’s very accurate for the price, with precision of up to 100 microns, and it combines this with workhorse-like reliability. You get a good size print volume, fairly fast print speed (up to 180 mm/s), and it’s also fairly quiet. You get very good quality prints and reliability for a 3D printer under $300, and we highly recommend it to anyone willing to invest the time to master it.

creality ender 3 pro reprap kit printing a vase

4. Anet A8

We feel the Anet A8 counts as a RepRap 3D printer since it is Anet’s spin on the Prusa, one of the most famous RepRap kits. It’s cheap and cheerful — you get what you pay for with this DIY 3D printer kit, with extra marks for its consistency and versatility. It’s versatile as it can print so many 3D printer filaments: PLA, ABS, PVA, Nylon, PP, wood and more.

For $160 you can’t expect peak performance, though the minimum layer height of 0.1mm is fine for most printing. Despite not having a weighed down aluminium frame or a dual extruder, the Anet A8 is fairly precise. The stainless steel rail rods, gears and bearings make the printing process more steady, though stability will be slightly worse than if the structure was made of metal.

anet a8 diy kit parts to assemble
The different parts of the Anet A8 to assemble this DIY kit.

The Anet A8 does not come assembled; you’ll need to build it yourself following Anet’s step-by-step instructions. Most find this more rewarding than buying a plug & play 3D printer, and it’s a great way to learn more about how they function. You can print with your Anet A8 using 3D slicers including Cura and Repetier-Host, and transfer your 3D printer models over via SD card.

Despite the cheap price, the Anet A8 comes with a few neat features. It comes with a heated bed, meaning it can print ABS and PETG, rather than just PLA. It’s also got quite a large printing volume: 220 x 220 x 240 mm. Overall, if you’re looking for a RepRap 3D printer which doesn’t break the bank and gets you started in 3D printing, the Anet A8 is a great option at just $200.

anet a8 best reprap 3d printer

3. Creality CR-10 V2

Creality are known for releasing some of the most highly rated and reliable low cost RepRap 3D printer kits in recent years, with the CR-10 V2 an upgrade on the well-loved original CR-10. Though a RepRap kit at heart, the CR-10 V2 can be built within an hour and without much DIY skill, making it a good 3D printer for beginners.

Not only is it reliable, but for the price it can print huge models, at up to 300 x 300 x 400 mm. It truly is a large 3D printer. In addition, the ability to print with a minimum layer thickness of just 0.05mm is very precise for a RepRap 3D printer kit for $500.

Complementing this printing precision is the stronger and heavier frame — the main upgrade in the CR-10 V2. The frame shape has changed to a more triangular shape — more similar looking to the original RepRap Mendel! — in order improve print stability and reduce the Z axis wobble, key to improving print quality.

The CR-10 V2 also has a filament breakage detector that pauses if it detects any issues without ruining your print, and can automatically resume printing in the event of a power outage. These are key features that you really don’t appreciate until disaster strikes 49 hours into a 50 hour print and they save you — but are an absolute life-saver. Overall, we highly recommend the Creality CR-10 V2.

creality cr-10 v2 reprap kit

BONUS — RepRap Mendel — Legendary RepRap 3D Printer

The first RepRap 3D printer on this list chosen because of its legacy rather than present performance, the RepRap Mendel is a true veteran of the game. The second iteration of the RepRap machines, the Mendel was the successor to the Darwin machine. It was designed and created by Ed Sells, a student of Dr Adrian Bowyer.

Named after Gregor Mendel, the ‘father of genetics’, this RepRap 3D printer weighs around 7kg and can print a fairly large 200 x 200 x 140 mm. Though it has a number of improvements over the Darwin, the sheer nostalgia and impact the Darwin has had since its introduction over a decade ago puts it above the Mendel for us.

best reprap 3d printer mendel
The RepRap Mendel, the second iteration of the original Darwin 3D printer.

2. FLSUN QQ-S Delta — Upgrade on the RepRap Kossel

The Kossel is an upgrade on the original Rostock and is designed by Seattle-based designer Johann. It was named after the German biochemist and geneticist Albrecht Kossel, and was known for its especially quick print speed.

  • We have also tested and reviewed the FLSUN QQ-S, which you can view if you click our FLSUN QQ-S review.

There are a number of newer RepRap Kossel 3D printers: we picked the FLSUN QQ-S, a delta 3D printer that you can buy almost fully pre-assembled for $369. Delta 3D printers are typically tall and thin, with the FLSUN QQ-S able to print up to 360 mm tall prints, with an XY axis of 255 mm.

Kossel RepRap machines were thought of as tougher to master 3D printers for more experienced makers. Now with the FLSUN QQ-S the learning curve is far reduced, especially since the RepRap upgrade ships to you almost completely assembled. The 3.2 inch touchscreen makes it very easy to use, and the printer comes with an SD card with the 3D slicer software on it, though you can also connect to the printer via WiFi.

Another main selling point is that it’s noticeably (or perhaps unnoticeably!) quiet — FLSUN claim it prints at under 50 dB. This, coupled with the fans and cooling system to avoid overheating and reduce any bad smells, makes the FLSUN QQ-S a great RepRap printer for your home. It retains the quick printing, around 30% faster than the average printer, so if time is of the essence, you could do worse than go with the FLSUN QQ-S.

It’s accurate, quiet, fast and doesn’t take up too much space on a desktop. We recommend it highly. The only drawback is that it may not seem as truly RepRap as it comes more or less pre-assembled, but it evolved from the original RepRap Kossel design so we feel it is worthy of inclusion.

flsun qq-s reprap kossel upgrade

1. Prusa i3 MK3S

The myth. The printer. The legend. The Prusa RepRap kit is the unmistakable king of RepRap 3D printers. There’s a reason why Josef Prusa’s invention shot him into the 3D printing stratosphere and landed him a place on Forbes’ 30 under 30 list — the printer is incredible.

Sporting a 250 x 210 x 200 mm print volume as well as a layer resolution of up to 50 microns, the Prusa i3 comes equipped for any 3D printed challenge. It’s designed to be simple to use, and true to the RepRap philosophy can print all the polymer components of itself. As a result of its success, Josef Prusa has had to print himself over 200 Prusa 3D printers, so this Prusa farm can print enough Prusa 3D printers to keep up with demand! Prusaception.

If you’re looking for a consistent and high-quality RepRap 3D printer or 3D printer kit, look no further. You can buy your Prusa 3D printer pre-assembled if you’re not DIY oriented, or assemble your own to save a few hundred dollars. Overall, we cannot recommend it enough, and it will go down in the 3D printer hall of fame in years to come.

RepRap 3D printer Prusa i3
The Prusa i3, encompassing printers such as the MKS3 shown above, is the undisputed king of RepRap 3D printers.