[Review] The Magicfirm MBot Grid II+, an average desktop 3D printer

[Review] The Magicfirm MBot Grid II+, an average desktop 3D printer

This post is also available in: France

Disclaimer: the comments and opinions expressed in this review are the results of our own (limited!) experience with the product. As always, we try to provide context to give a fair overview of the product. We strive to remain impartial and unbiased, and we have not received any payment or compensation of any form for writing this article. Magicfirm lent us a MBot Grid II+ 3D printer for free for the duration of the test.

Brand Magicfirm
Model MBot Grid II+
Price $1,099
Rating 3.3/5



Magicfirm is a Chinese company founded in 2009. Magicfirm has developed and manufactured the MBot personal 3D printer series, based on open source designs. 3D printer. Their first printer was a Makerbot clone, called the MBot Cube, designed with plywood panel and priced at only $559 in its Kit/DIY version. This affordable 3D printer was later on replaced by the Grid, which was itself updated in the Grid II and Grid II+, the version we are testing today.

Magicfirm’s goal is to democratize low-cost desktop 3D printers, and bring this technology to designers, engineers, scientists, and even amateurs. Magicfirm/Mbot works on optimizing the structure and performance of their desktop 3D printers and software to provide a faster and more accurate 3D printing experience with a better user experience. By learning from customers’ requirements and feedback, the company continuously improves the performance of their products, as do many 3D printer brands.

Our Magicfirm MBot Grid II+ setup.

Our Magicfirm MBot Grid II+ setup.

The MBot Grid II+ was introduced in January 2016. It offers some interesting features for a reasonnably priced desktop 3D printer, including:

>A glass build plate covered with a BuildTak-like material. Non-heated print bed but great for PLA 3D printing, with a nice stickiness during the 3D prints, and easy-to-remove the objects once finished.
>An automatic compensation system to level the build plate while printing.

For an additional $100, the MBot Grid II+ can be equipped with a second extruder head, for multi-material 3D prints.

Tested objects: MBot test file, Benchy, Make Magazine Torture Test, Twisted Hex vase and 3D KitBash Test Kit.

3D filament used for the test: MBot Magicfirm Premium White PLA and Machines-3D Electric Blue PLA.

Total 3D printing test time: 50 hours

1. PACKAGING – 3.5/5

  • Unboxing: a thick styrofoam package
Inside the MBot Grid II Plus cardboard packaging. On the left the accessories box, on the right the 3D printer bellow the first layer.

Inside of the MBot Grid II Plus cardboard packaging. On the left the accessories box, on the right the 3D printer bellow the first layer.

The Magicfirm MBot Grid II+ was delivered to us directly in Tokyo from China. The cardboard is pretty big and weighs 31 kg. When you open it, you first find a layer of cardboard, then a thick styrofoam layer, in which are held all the accessories for the 3D printer. Once the accessories layer is removed, you can directly access the 3D printer itself, surrounded by 2 large shells of styrofoam.

In order to remove the 3D printer from its protective envelope, it is best to grab it by the side of its solid frame. The extruder is held in place on its two sides by duck tape. Below the print bed holder, you can find a small and secured cardboard which contains a roll of Magicfirm 3D filament.

  • Instructions manual: scarce information, but the bare minimum is here

The Magicfirm Mbot Grid II+ was delivered with two very short instruction manuals, well illustrated and in nice glossy paper, but … redacted in Chinese!

Hopefully, the 3D printer comes with useful QR codes in the package, which directly link to the Mbot website, where all the basic information to run the 3D printer is available in English, and in PDF format. However there is not a lot of details, and for beginners this can be unsettling.

  • Accessories: the land of plenty
MBot Grid II Plus accessories.

The MBot Grid II+ accessories.

The Magicfirm MBot Grid II+ accessories package contains a cutting pliers, a nozzle cleaning tool, 4 Allen keys and a small spatula to remove the 3D prints from the print bed.

For the connectivity Magicfirm included an alimentation cable, a USB cable, a USB dongle as SD card reader and a SanDisk 8Gb SD card. Also included in the package is a 1 kg spool of Mbot Magicfirm Premium White PLA 3D filament, wrapped in a sealed plastic bag with a humidity absorber. As we learned later during this test, this 3D filament is of very poor quality and we recommend to simply not use it and rather use filament of better quality.


  • Software – 4/5
The Magicfirm software: MPrint

The Magicfirm software: MPrint.

Installing MPrint, the software to operate the 3D printer, is simple and straightforward. We simply downloaded the latest version from the MBot website. MPrint is available for Windows and Mac computers. For this test we used a Macbook Pro computer so we downloaded the latest version of MPrint The small files can be downloaded in a few seconds and installed in less than a minute.

MPrint offers a very simple interface with only the basic necessary options to 3D print. The left buttons are used to Import, Export, Navigate the 3D models and Configure the settings for the 3D print. Note that some of the features available on the Windows version do not work on Mac. It is not possible to swap between slicers, as only MBotSlicer is offered on Mac (on Windows you also have access to Slic3r).

The MPrint software cannot connect the MBot Grid II+ to a Mac (once again, this feature is only available for Windows). Therefore we only used it in order to generate the .X3G files before saving it on the SD card.

On the 3D printer side, displayed on the MBot Grid II + LCD screen, the software is very simple. The simple user interface offers 4 different menus: “Print”, “Filament”, “Settings” and “Version” to operate the 3D printer.

  • Hardware – 4/5
The Magicfirm MBot Grid II Plus seen from above.

The Magicfirm MBot Grid II Plus seen from above.

The Magicfirm MBot Grid II+ has a solid and sturdy build which inspire trust, quite similar to the Zortrax M200. The Grid II+ is heavy and robust and its front panel is made of black acrylic for a classy and glossy look and feel. The installation of the filament support (a cheap plastic part) is fast and simple as it simply needs to be put it place at the back of the 3D printer, the gravity holds it in place.

There are no 3D printed parts on the MBot Grid II+. The maintenance is easy with its open frame and accessible machinery and electronics.

A closer inspection of the inside of the 3D printer, however, reveals that the screws are of low quality and the threading can be damaged after too many maintenance operations. Almost any part can be disassembled with the Allen keys, an important point for maintenance.

The 3D printer has a small LCD screen (by default displayed in Chinese). It offers a bright contrast and is easy to read. The interface button is large and flat, except for a small round recess. Most of the animations are funny, like the little Pacman showing the 3D printing progress. Its user experience is very pleasant, with a nice feel when turning it and a smooth click for validation.

The LCD screen interface of the MBot Grid 2 Plus.

The LCD screen interface of the MBot Grid 2 Plus.

The build plate of the MBot Grid II+ is made of glass, a material which makes for good print platform thanks to its stability against environmental conditions (temperature, hygrometry). The build plate is covered with a BuildTak-like material for an enhanced adhesion of 3D printed objects.

The MBot Grid II+ is also equipped with a LED ramp. When the extruder is heating, the 3D printer LED is red. While 3D printing, the build chamber is illuminated with a nice blue glow, which becomes white when the 3D printing job is complete. In addition, the 3D printer makes some “cute” noises when it starts and when it stops printing, like a little robot!

  • Getting started – 1/5

The very first step for 3D printing is to load some 3D filament to the extruder. This is a fast and simple process. We simply pressed the Load option in the “Filament” menu, and once the extruder has heated properly the extruding motor starts extruding. After a few seconds you can stop the process, the 3D printer is ready.

To get started with our Mbot Grid II+, we begun by 3D printing one of the 3D files included on the SD card. Because most of the 3D printers are directly tested and calibrated at the factory, we simply selected the MBot test file and hit the “Print” button.

The first layers (raft) came out well but very soon we realized that there was an issue with the print as the vase was getting 3D printed with a lot of shifting: each layer was not on top of the previous one, but slightly on its left. The higher the layer, the more shift we got and after 15 minutes of 3D printing we stopped the experience.


The “shifting” issue with our first test 3D print.

We first thought it was related to the file itself, so we prepared a 3D Benchy with MPrint (more about that later in the same section), but when 3D printing we got the same result; an increasingly shifting layer deposition. Once again we canceled the 3D print.

The Magicfirm MBot Grid 2 Plus motherboard.

The Magicfirm MBot Grid 2 Plus motherboard.

We contacted the Magicfirm support team and got a very fast answer (less than 30 minutes). They advised us to consult a dedicated FAQ page in their website, and a procedure to check the hardware calibration of the build plate. Meanwhile, we started investigating what could possibly be going wrong with the 3D printer hardware. We soon realized there was an issue with the Y end travel function sensor (attached to a small electronic card), as the LED was not lighting when solicited. We disassembled it and also the X end travel electronic card (entirely similar with the Y one) to see if the card or the cable was damaged. As the working X end travel card stopped working we concluded the issue was linked to the cable.

We removed the back metal panel which covers the motherboard. We quickly discovered the culprit: the cable was simply unplugged from the motherboard, it must have happened during shipping. After plugging it back, the sensor worked properly.

It was now time to recalibrate properly the print bed. The process is quite simple, it implies following instruction displayed when 3D printing a specific 3D file, by default on the SD card. It took us less than 5 minutes to get the correct settings and be back on track. We once again selected the MBot default file and this time, the print came out nicely. The 3D printing surface was not perfect but OKish so we decided to keep on going and testing.

On the software side, the process for launching a 3D print is pretty straightforward. In MPrint, you can simply drag and drop your 3D model on the virtual build plate. The options offered are limited, but you can rotate, scale and reposition the 3D model before exporting it. The navigation options are simple and easy to understand, and you can zoom and turn around the object to check that everything is OK. Note that panning is not available, so the camera is always aiming for the middle of the plate.

The first successful 3D print on the Magicfirm MBot Grid 2 Plus.

Our first successful 3D print on the Magicfirm MBot Grid 2 Plus.

To launch our next print, we simply selected the 3D printer in the dropdown menu, and once our STL file was imported (the famous 3DBenchy) we started to input the correct 3D printing parameters. By default the resolution (layer thickness) is set to 200 microns, the temperature 230 degrees Celsius (quite hot for PLA) and raft is activated. We unticked the “raft option” (as well as the Support) and hit the Export button. This generates a .X3G file, the GCode of instructions for the MBot Grid II+ which you need to transfer to the SD Card before using it to 3D print. Because there are only a few options, this process is quite intuitive.


  • Software – 2.5/5

The software provided by Magicfirm to operate their 3D printers is simple and straightforward. It does not offer a lot of options and you won’t get lost while operating it, although the lack of instruction can be challenging for entry-level users. 3D printing experts will be frustrated by the lack of options.

The MBot Grid 2 Plus software MPrint experience.

The MBot Grid 2 Plus software MPrint experience.

With only a few options available, the user interface offers a good overall experience. It is easy to import a STL file, select the 3D printing parameters and export the file in the .X3G format. As we tested MPrint on a Mac, our feedback only applies for this system. The export button offers a few export destinations, and it is not possible to precisely chose where you want to save the file.  We recommend to first insert the SD card reader in the USB slot so it immediately shows in the destination menu.

The Auto-align feature of the build plate can be selected in the Parameters in MPrint, along with the other 3D printing parameters such as extrusion speed, temperature of extrusion, infill ratio…

The slicing tool, called MBotSlicer, is extremely slow. When the file is a big or complex, it can take up to several minutes to obtain the .X3G file, and the progress bar is adding to the frustration of the wait. It sometimes got stuck for ages on the 12% value, before going very fast to reach 100%. Once the printable 3D file is generated, there are absolutely no statistics about how much 3D filament will be used or the time it will take to 3D print the part. The only 3D printing time estimate you get comes only after the printing process has started and a few layers are done. This is really frustrating.

The MBot Grid 2 Plus software MPrintPre View option.

The MBot Grid 2 Plus software MPrint preview option.

The 3D printing preview offered by the software is not very practical. It is a very simple viewer that let you show/hide the building layer. It is hard to get any useful information from this, apart from checking there are supports are the right place.

  • 3D printing – 2.5/5

Once the correct print parameters are input correctly, the 3D printing process itself is quite smooth. It is simple to load the 3D file from the SD card and simply hit the Print option.

The build plate of the MBot Grid II+ is covered with a BuildTak-like material which provides an excellent adhesion during the 3D print, but also makes the 3D printed object very hard to remove. We did not find any option to increase the height of the first layer, so every 3D printed object had to be removed with a sharp cutter.

After a few prints with quite mediocre results, we were quite concerned about the performance of the Magicfirm MBot Grid II+. The biggest issue was a lot of oozing between parts and gap, and the unclean finish of surfaces. This was not expected given the robust build and experience of the manufacturer.

The Magicfirm MBot 3D Filament.

The Magicfirm MBot 3D Filament.

We quickly found out that the 3D filament provided (MBot Magicfirm Premium White PLA) was the one to blame. This material is of very low quality. It also had the tendency to break in many small parts, which makes it necessary to unload and reload the filament. We switched to another filament and obtained very good results immediately. We used a generic PLA from the brand Machines-3D, a 3D printer reseller from France. We carried on all the following tests using this filament and we also lowered a bit the extrusion temperature, to a more standard 210 degree Celsius.

The intelligent auto compensation system of the build plate works well because no matter how many times we moved the 3D printer and removed the build plate, the 3D prints always offered good quality regarding the Z axis alignment. However, we noticed that when several small structures needed to be 3D printed, the nozzle was oozing a bit, which conducted to some small misalignment on the X and Y axis. This is detailed in the 3D Printing Results section of this article.

The disassembled Magicfirm MBot Grid 2 Plus print head.

The disassembled Magicfirm MBot Grid 2 Plus print head.

During most of this extensive 3D printer review of the Magicfirm MBot Grid II+, everything went well, with a steady 3D printing output and some challenging 3D prints that lasted more than 8 hours. However, twice the 3D printer paused itself due to a “Filament probe” issue. After a reload of the 3D filament we had to manually relaunch the print from where it had stopped, hopefully without consequences. The pause function is very efficient but this unexpected behavior brings concern.

We must also mention that during our tests, we encountered a major extruder block. Cleaning the nozzle did not solve the problem and we had to remove unwanted plastic from the extruder feeder system. For this, we had to remove the extruder by disassembling it from its carriage and then picking up the little blobs of plastic with small tweezers. The whole operation (including putting back together everything) took us almost 30 minutes, but once the job was done, we realized there was a better and simpler way to do that. It is in fact possible to access directly the extruding feeder by only moving away the front fan, held only by a pair of screws.

On a more positive note, we must mention the fact that once again the MBot customer support was fast and efficient, a very important point.

  • Noise – 4/5

The MBot Grid II+ is rather quiet for an open frame 3D printer. The noise frequencies are not too irritating and it is possible to use it inside an office, as long as you are not too close from it. We measured values around 55 dB in operation at one-meter distance, using the Android Sonometer app on a Nexus 5 smartphone.


Test prints were all produced using Machines-3D Electric Blue PLA (a generic material) as the Magicfirm offered 3D filament was really bad. We tested several 3D print layer thickness (between 200 microns and 100 microns) at an extrusion temperature of 210 degrees Celsius. All the other parameters (speed, retractation, infill…) where the default recommended by Magicfirm MPrint software. Apart from the initial test MBot test file we did not use support and raft.

The best results were obtained using a 150 microns layer thickness. This parameter allows the MBot Grid II+ extruder to perform at its best potential, with almost no oozing. We also found it to offer the best quality to speed ratio, with 200 microns beeing a bit rough, and 100 microns simultaneously too long and not significantly better.

1. Benchy – 4/5

 3D Benchy 3D printed on the Magicfirm MBot Grid 2 Plus in 100 microns resolution.

3D Benchy 3D printed on the Magicfirm MBot Grid 2 Plus in 100 microns resolution.

To evaluate the performance of the Magicfirm MBot Grid II+, we started by printing out some Benchys. The 3D Benchy is a de-facto standard torture test for 3D printers and is commonly used to verify dimensional accuracy and overall 3D printer capabilities.

For reference, we included the first 3D printed Benchy with the default MBot Magicfirm Premium White PLA.

 3D Benchy 3D printed on the Magicfirm MBot Grid 2 Plus.

3D Benchy 3D printed on the Magicfirm MBot Grid 2 Plus.

The Benchy came out really clean with the Machines-3D Electric Blue PLA. Both 100 microns and 150 microns resolution offer a nice finish, clean surfaces and good details. Interestingly, the 150 microns one was cleaner with no little hanging threads. The “3DBenchy” writing on the back of the hull is also more defined in 150 microns.

2. Make torture test – 3.6/5

Make torture test 3D printed on the Magicfirm MBot Grid 2 Plus.

Make torture test 3D printed on the Magicfirm MBot Grid 2 Plus.

Make Magazine’s 3D Printer Torture Test offers a rigorous approach for testing the limits of a 3D printer. We use it as a benchmark test. All the 3D prints were done in 150 microns layer thickness. The results were good for most tests. However, it seems that the MBot Grid II+ has a hard time stopping the extrusion flow and finding back the correct position to start extruding again; hence the poor results of the “Fine positive space features performance” test.

> Dimensional accuracy – 4/5
The MBot Grid II+ did a very honest job, with average deviations in X or Y are between 0.1 and 0.2mm.

> Bridging performance – 4/5
The bridging performance was good, with only the two longest bridges having dropped perimeters.

> Overhang performance – 4/5
A good performance, only the back of the 70 degrees angle is a bit less clean. Surfaces are almost all clean and aligned.

> Negative Spaces Tolerances – 3/5
The three easier to remove pins went off very nicely. The last two won’t move even when forcing.

> Fine Positive Space Features Performance – 2/5
The result for this test was not good, with a lot of stringing at the ends of the spires and a bad alignment of the different layers.

> Mechanical Resonance in XY – 2/2
> Mechanical Resonance in Z – 2/2
Both mechanical tests went very well, with proper alignments and clean surfaces.

Twisted Hex Vase 3D printed on the Magicfirm MBot Grid 2 Plus.

Twisted Hex Vase 3D printed on the Magicfirm MBot Grid 2 Plus.


3. Twisted Hex Vase – 4.5/5

Twisted Hex Vase by bkpsu
This nice looking vase is great to assess the 3D printer’s ability to print clean and smooth surfaces. It has a large base so can be hard to unstick from the print bed and can create warping and too much adhesion to the build plate.

We also like it because of its hexagon shape that looks a bit like our logo :) .

The Twisted Hex Vase came out very clean, the flashy color of the blue PLA making it very good looking. Only downside of this 3D print was the struggle to get it off the build plate.




4. 3DKitBash v2 – 3.5/5

3DK have released their own set of 10 chips designed to test all the above-mentioned aspects of 3D printing (including voids, spikes, edges, text, bridges, flex and articulations). The articulations offer the ability to test the ability for the 3D printer to produce functional assemblies in one print.

The ten piece set of Test Chips from 3DK was printed successfully, with good and detailed surfaces for most of the chips; they were also hard to remove from the print bed, a recurring problem with the MBot Grid II+. While all chips were dimensionally accurate, surface textures were slightly rough. All Print-In-Place elements were produced accurately and required almost no physical help to engage their range of motion.

 3D KitBash V0.2 test files 3D printed on the Magicfirm MBot Grid 2 Plus.

3D KitBash V0.2 test files 3D printed on the Magicfirm MBot Grid 2 Plus.

As a reference we also made a side-by-side comparison of the first 3D prints made with the included MBot Magicfirm PLA and the Machines-3D PLA. The difference is staggering.

 3D KitBash V0.2 test files 3D printed on the Magicfirm MBot Grid 2 Plus with two different PLA filaments.

3D KitBash V0.2 test files 3D printed on the Magicfirm MBot Grid 2 Plus with two different PLA filaments.

5. VALUE – 2.5/5

The Magicfirm MBot Grid II+ is a 3D printer with a robust frame. It offers no special features and its print quality is above average with good PLA filament. However, most of its user experience seems to be unfinished with its slow and limited software. MPrint has potential but Magicfirm need to upgrade it quickly to make it good. We also encountered a lot of issues during our test. For a consumer-grade product that is not acceptable, even more when the Magicfirm MBot Grid II+ is priced at $1,099. The very bad 3D PLA filament should also be replaced, and we strongly advise Magicfirm to change provider.


Our overall rating reflects our experience with the Magicfirm MBot Grid II+, printing with Machines-3D Electric Blue PLA. As we recommend to absolutely avoid this filament, the rating does not include the results with the MBot Magicfirm Premium White PLA.

The MBot Grid II+ can produce good quality 3D prints when used with good quality PLA filament. We got the best results with closed objects when the 3D printer did not have to stop and start again extruding multiple time. That might be caused by a difficulty to handle very precisely the extrusion flow. We recommend user to stick to 150 microns layer thickness for obtaining good quality 3D prints and avoid spending too much time.

Magicfirm should upgrade their MPrint software and add a few features. In our opinion, the main priority would be adding an estimate of the total print time, which could be done at software and 3D printer level. Another very interesting option we would like to see is the possibility to set offsets between the first layer and the print bed, and between the raft and the object. Right now, that makes the final 3D print really hard to remove from the print bed and to separate the object from its raft.

Weight Rating
Packaging 1 3.5/5
Overview and setup 2 3/5
Experience 2 3/5
3D printing results 2 3.9/5
Value 1 2.5/5


  • Robustness of the frame and simplicity of the design
  • Stickiness of the build surface
  • Great customer support
  • Quiet


  • Issues during the 3D printing process
  • Some important software functionalities are missing
  • Awful quality of the included 3D filament

The Magicfirm MBot Grid II+ is a promising desktop 3D printer but it’s not fully satisfying yet. It is capable of producing above average quality 3D prints. Its automated leveling feature works well, it is quiet and won’t be out of place in a working office or a consumer basement/garage.

However, this 3D printer has some serious flaws and it’s hard to recommend buying it. We encountered a lot of issues during our 50 hours of 3D printing. Running into a few problems with an affordable desktop 3D printer is expected, but we got a filament jam, an unplugged cable which tempered an important sensor and even some impromptus pauses during the 3D printing process. We must also mention the very bad quality of the included 3D filament which went straight to the bin after a few tests. One good point though, the customer support is very kind and reactive, and you never feel left alone.

All these issues could be acceptable on a DIY/Kit under $500, but the MBot Grid II+ does not come cheap. At $1,099, the single extruder version has a lot of competitors and most of the time it will be worth saving and buy a cheaper 3D printer, such as the $899 Original Prusa i3 MK2. Another alternative would be to invest in a slightly more expensive product such as the $1299 Sindoh 3DWOX for example. We strongly believe Magicfirm can improve their product (software and hardware) and the Grid II+ has a lot of potential to evolve from a average desktop 3D printer to a good one.


We carry hands-on tests of 3D printers, 3D scanners and 3D filaments in our lab in Tokyo. Get in touch if you’d like us to review your products!