# Modulant - 150g Beginner Robot **URL:** \ **Category:** Bot Builds & Designs\ **Tags:** work-in-progress, antweight-150g\ **Created:** [7 August 2025 19:48 UTC](https://forum.bristolbotbuilders.com/t/modulant-150g-beginner-robot/542 "2025-08-07T19:48:10Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Patrick](https://forum.bristolbotbuilders.com/user_avatar/forum.bristolbotbuilders.com/patrick/32/3194_2.png) [@Patrick](https://forum.bristolbotbuilders.com/u/Patrick)\ **Post date:** [7 August 2025 19:48 UTC](https://forum.bristolbotbuilders.com/t/modulant-150g-beginner-robot/542/1 "2025-08-07T19:48:10Z")
Hi Everyone, In the typical fashion I had intended to post this earlier this year, but various things got in the way, and I have made it to a grand total of 1 competition so far… As AWS 75 looms, I’ve had to rush to rebuild my little(ish) antweight fleet and remembered that I’m yet to post modulant here. [Modulant](https://www.printables.com/model/1216336-modulant-modular-antweightfairyweight-combat-robot/collections) was envisaged as a robot which can run with nearly any antweight compatible parts, so when new people ask me how they can get involved in robots I can just point them at something approachable which will work for whatever design they’ve envisaged. It’s also a nice way to use up my absolute mountain of spares that wont fit current revisions of my robots. The design goals were as follows - Work with common antweight motors - Work with any antweight wheel from 20mm to 46mm - Have customisation parts that can be made with hand tools - Have upgrade potential on a single chassis - Have at least 4 workable robot configurations - Have entirely too many screw holes so you can fasten anything you can imagine to it All of these combine to make something that I can print a lid and body for, then hand out to people as needed for practically free. In January I started working on the first draft of this, with configurations for a lifter, vert and horizontal spinner. ![1000024887](https://forum.bristolbotbuilders.com/uploads/default/original/2X/d/d3f615c5846faffe02a398f66dce050396fb1205.jpeg) ![1000024888](https://forum.bristolbotbuilders.com/uploads/default/original/2X/a/afac9d5144a0c727a58dea12b32130bf43f00290.jpeg) This ended up working reasonably well, and designed a few more options before publishing it. I designed a wedge to enter into a friendly rumble, and stuck a little piece of grade 5 titanium on the front as a joke. ![1000024889](https://forum.bristolbotbuilders.com/uploads/default/original/2X/5/5a9ed5e1fd284bde1c8d8b84d08bf922e84de521.jpeg) I worked on this a little further to make some more configurations over the next few weeks ![1000024903](https://forum.bristolbotbuilders.com/uploads/default/original/2X/a/a2c468d054abaf4b61fd630bef10adda899d7706.jpeg) This worked out pretty well, but eventually I reached a point where I had to make drastic changes to the design and it needed a V2. V2 built upon the first design, keeping the armour panels, shortening and widening the robot to allow for larger, easier to source batteries and stronger mounts for weapons. I had started working with a local school on a robotics club to try and build a community local to me, and the battery changes were absolutely paramount as my little aging mountain of 180mah nano-techs can only last so much longer. The increased runtime means they can be used for STEM events without having to change the battery out every 12 minutes which is a plus. ![1000024909](https://forum.bristolbotbuilders.com/uploads/default/original/2X/2/2f5377cce404a1993c06c6ff79abff52cfdd8d22.jpeg) As it currently stands the V2 has a flipper, lifter grabber, wedge, hammersaw and horizontal variants, as well as a silly dual vert option which I only ran once. I still haven’t got round to making an M10 compatible lid but it’s in the works. ![1000018515](https://forum.bristolbotbuilders.com/uploads/default/original/2X/b/b4482a06e97b999d896afa9bdf828aa40f1b4f56.jpeg) _Said silly dual vert_ Anyway, if anyone fancies giving it a try, I’d love to get some feedback! I’m always updating the design with new features, and it should work with any combination of BBB parts. ---
**Author:** ![scamell2k9](https://forum.bristolbotbuilders.com/letter_avatar_proxy/v4/letter/s/a183cd/32.png) [@scamell2k9](https://forum.bristolbotbuilders.com/u/scamell2k9)\ **Post date:** [7 August 2025 20:38 UTC](https://forum.bristolbotbuilders.com/t/modulant-150g-beginner-robot/542/2 "2025-08-07T20:38:50Z")
This is awesome, I have always thought it would be a perfect way of getting it into schools and clubs - would love to do something similar is the future. Good work ---
**Author:** ![Patrick](https://forum.bristolbotbuilders.com/user_avatar/forum.bristolbotbuilders.com/patrick/32/3194_2.png) [@Patrick](https://forum.bristolbotbuilders.com/u/Patrick)\ **Post date:** [9 August 2025 09:56 UTC](https://forum.bristolbotbuilders.com/t/modulant-150g-beginner-robot/542/3 "2025-08-09T09:56:32Z")
Great to hear, I’d encourage you to try your own, I learned a lot trying to make a jack of all trades design! I’ll publish a proper assembly guide once I’m finished with it, all the files are free and if there’s anything you’d like to add or change, request it and I’ll see what I can do. ---
**Author:** ![Fastelectrics](https://forum.bristolbotbuilders.com/user_avatar/forum.bristolbotbuilders.com/fastelectrics/32/6182_2.png) [@Fastelectrics](https://forum.bristolbotbuilders.com/u/Fastelectrics)\ **Post date:** [10 August 2025 10:26 UTC](https://forum.bristolbotbuilders.com/t/modulant-150g-beginner-robot/542/4 "2025-08-10T10:26:30Z")
Looks like a great concept. Good work! ---
**Author:** ![Patrick](https://forum.bristolbotbuilders.com/user_avatar/forum.bristolbotbuilders.com/patrick/32/3194_2.png) [@Patrick](https://forum.bristolbotbuilders.com/u/Patrick)\ **Post date:** [15 August 2025 09:07 UTC](https://forum.bristolbotbuilders.com/t/modulant-150g-beginner-robot/542/5 "2025-08-15T09:07:57Z")
Cheers! Modulant performed reasonably well at AWS75, with a 50% win rate. I pulled off probably the best and worst driving I’ve ever done, with nerves getting to me and both losses coming from an almost unaided drive to the pit - it’s a lot faster than what I usually drive! The new flipper configuration used was the only variant that competed, I still need to clarify just how much of a robot can change between configurations and still be legal - being able to change weapons would be very interesting depending on the opponent. ![1000025179](https://forum.bristolbotbuilders.com/uploads/default/original/2X/3/334372314c7c2ebc78eb6ad6d52a3906dda097f7.jpeg) New parts will be published Monday once I get back. ---
**Author:** ![HBantweightrobots](https://forum.bristolbotbuilders.com/user_avatar/forum.bristolbotbuilders.com/hbantweightrobots/32/7263_2.png) [@HBantweightrobots](https://forum.bristolbotbuilders.com/u/HBantweightrobots)\ **Post date:** [19 November 2025 16:18 UTC](https://forum.bristolbotbuilders.com/t/modulant-150g-beginner-robot/542/6 "2025-11-19T16:18:21Z")
I love the multiple configurations idea! Great job you’re doing here Patrick! Hollis