Skip to content

SMARS modular Robot

Creation's quality: 5.0/5 (5 votes)
Evaluation of members on the printability, utility, level of detail, etc.

3D model description

SMARS acronym of “Screwless/Screwed Modular Assemblable Robotic System” is a simple robot designed to the educational field. The main features of SMARS are the reduced number of components, the possibility of mount it without screws and without soldering any part, it doesn’t need glue or similar and it’s really cheap to build. Another main point of SMARS is the modular design. You can mount different sensors and tools and design your own parts. In future I’ll add new modules or DLC to improve the model but It would be nice if you could share your mods too.

Join the Facebook group!
Facebook page:

To build the basic model (with “chassis -SL.stl”) you just need few extra components:
-2x mini 150RPM motors
-1x 9[V] battery
-1x 9[V] battery connector

-1x Arduino UNO

-1x Adafruit Motor Shield V1 or V2


For the screwed version ( “chassis -S.stl”) you just need two 25mm M4 screws and two self locking nuts.

The joints of the tracks are simply pieces of 1.75mm filament cutted at the right length.

To assemble the screwless version you will need a multi slip-joint gripping plier to insert the “slave wheels”.

One of the next DLC will be the Quadpod mod. if you are interessted to move from tracks to legs, use the screwed version “chassis-S.stl” (“chassis-SL” will not be compatible)!

These models fits also:
-3x AAA batteries (check on my profile for the DLC)
-1x PS3 controller 1800mAh 3.7V Li-Ion Battery (be careful and use it only if you
know what you are doing!)


P.S updated files for ultrasonic 2a and 2b, use these ones, the old ones have an error and you can have some troubles during printing

3D printing settings

infill 20%
layers 0.2mm
supports touching building plate only in file "chassis_SL"

  • 3D file format: STL and ZIP
  • Last update: 2020/10/14 at 13:36
  • Publication date: 2017/11/22 at 12:53



Designs 63
Downloads 10.2k
Sales US$1,581
Followers 327

Just a dude who loves CAD & 3D printing.
If you like my projects, support me buying the material from my links, it will not cost you extra money and you will allow me to finance new projects! I would really appreciate it!
Amazon fr
amazon US
amazon UK
amazon IT



Collection associated with this 3D model

Best sellers of the category Gadget

Add a comment


I love this work, cant you try and create an ESP8266 / Node MCU version for this?
Breathe Wi-Fi into this little monster!!!

How many track pieces? Looks like 16 per side from the pictures but can you confirm?

Hi, sorry but I do not. It's just a small difference, so I did not make it. In the first step you have to insert the M4 screws and the nuts to fix the slave wheels (in the SL version there are two "pins" on the chassis). The nut goes inside the chassis, there is a shaped hole so it will not turn when you screw the screw.

Do you the have instructions for SMARS S V1.0? The zip folder has only one for the SL version :)

Would you like to support Cults?

You like Cults and you want to help us continue the adventure independently? Please note that we are a small team of 3 people, therefore it is very simple to support us to maintain the activity and create future developments. Here are 4 solutions accessible to all:

  • ADVERTISING: Disable your AdBlock banner blocker and click on our banner ads.

  • AFFILIATION: Make your purchases online by clicking on our affiliate links here Amazon, Gearbest or Aliexpress.

  • DONATE: If you want, you can make a donation via PayPal here.

  • WORD OF MOUTH: Invite your friends to come, discover the platform and the magnificent 3D files shared by the community!