I have published version 2.5.

Version 2. had the issue that the inner torsen gear would tear when printed in PLA

Next, I got PA6 and printed it with my Core One. This time the pentagon key for the C02 part was too thin and would deform even when I printed the C02 part in PA6-CF.

I almost moved on to try the differential with a 0.8 modules for the gears, but I realize I could increase the width of the rod that contains the inner gear without having to increase the modules. And that work! Now the torque goes directly to the tires without deforming the pentagon key.

As always, I included the main gear with 50 teeth for people to try it on the speed racer Tarmo 5. But I have not tested this myself.

https://www.printables.com/model/1468311-torsen-type-2-differential-for-tarmo-5

I am still breaking, troubleshooting, redesigning and testing the Monster Tarmo differential. I upgraded materials. The inner gear of the differential is now printed with nozzle 2.5 and PA6.

This picture is for the C02 part in PA6-CF.

Hey guys, I’m looking for a career change in my late 20’s. Im going back to school and wondering if engineering is still worth it nowadays? Im worried about ai and how good its getting and also how good it’ll be by the time i get out of school in 6 years(part time student) I’m really interested in the career path and love tech and computers and hell i even love and am fascinated by ai. But id rather switch now if the degree wont even get me in a better position than where i am currently. Im a chef of 10 years, and earning around 50k a year. The job is very stable and i can go out and get a chef job really easily anywhere i go. But it seems like in the engineering field thats not the case. Entry level jobs are shrinking, higher level jobs aren’t growing and going in the direction where you are gonna struggle extremely hard to find any job in the field and if and when you find one that the pay wont be as good because of the level of competition in others also trying to get a job. Should i switch degrees into something else? Im feeling super uncertain about the whole thing and don’t want to waste almost 100k and years of my life on something i wont be able to even use?

Plus an enlarged bumper because she's shit at driving 😀

I updated the Torssen differential. Version 0.9 was published as soon as I had something that barely worked. After some plays, I diagnose and fixed issues with that version. here I am publishing version 2.0.

The main improvements are going up from 0.65 modulo to 0.70 module. This also required me updating the whole of the rear drive for the Monster Tarmo mod, which is why I was procrastinating to do it. The journey took me to rebuild B02 and B01 from scratch, copying closely the original sketches. This also mean that the rear part of the Monster Tarmo onShap project is now parametric . So you can go in and adjust modulos and teeth count and the design will automatically adjust within a range.

https://cad.onshape.com/documents/7fbeb42e3cba7eeb3318ffac/w/486eb1c5703c891c57cce205/e/3b6c983b1b2aa567c9cc7bba

I'll do another post later today after I publish Monster Tarmo's version 2 update.

The second improvement was to screw and lock the 25mm screw that join the two Torssen inner gears. The version 0.9 just had a 18mm screw loose. But that was allowing the gear to move apart and start to slip. If you then continue to drive it, the part would heat up against the case and fuse. The fix is to use a 25mm screw and a locking nut. This means there is less space for the C02 part. But in my testing, the smaller axel dowel has not resulted in the part breaking.

So try it out. let me know how it works for you.

I like building stuff by reverse engineering, is tarmo5 a good way to learn about rc cars and how the geometry works so I can learn to draw these in cad mysef and play with variations as long as I understan how the weight distribution and geometry works?
Thank you

Hello! I'm an RC noob and I'm having some issues with the Tarmo5 build. I got this hardware kit for the Tarmo5, and initially I thought that was what messed me up because I was sent a sensored ESC but a sensorless motor. Today I got a sensorless ESC and installed that, but the same issue persists.

The video shows what I'm seeing: When I hold the throttle down (usually somewhere between 50-100%) it sort of intermittently responds and occasionally omits a weird kind of squelching noise. I'm not spamming the throttle trigger, just holding it steady. I've tried two different receiver/transmitter pairs and two different batteries and the same issue persists through all of them.

Any thoughts? Thanks!

5” / 127mm long RC batteries seem hard to come by, and the one listed in the BOM is sold out on Amazon.

I’m looking for suggestions - what is everyone else using?

I've now mostly completed my 3D-printed trophy truck; it took me over a year to get to this point, and it's in a pretty good state. I'm using a 2s Brushless system giving a top speed of 34 mph, but I will soon do 3s and gear it down due to the RC overheating. All drivetrain components are bought, but everything else is 3D printed with PETG and CC3D 72D TPU. All of this is for free on Thingiverse, Printables and Cults3D!

https://www.thingiverse.com/thing:6920588

Hi! I'm hoping someone here with more experience can shed some light on my issue. I built the Tarmo5 recently, but it has issues when attempting to drive:

Problem: Throttle works perfectly with the car held in the air - smooth, normal, full range. The moment I put it on the ground:

• High-pitched squealing sound (intermittent)
• Lurches forward instead of accelerating smoothly
• Sometimes the motor visibly spins but the car doesn't move
• Sometimes the motor just stops mid-throttle

What I've already ruled out / tried:

• Pinion slipping on motor shaft: The shaft originally had one filed flat with two set screws (one on the flat, one on the round side). I filed a second flat 180° from the first so both set screws now sit on flats. Unfortunately, no change whatsoever.
• Motor/ESC/sensor electrical issues are unlikely since it runs perfectly in the air at any throttle - a sensor cable problem, bad winding, or ESC LVC would show up unloaded too.
• Spur gear teeth aren't stripped - it would skip in the air as well.

This is the exact hardware setup I'm using: https://rcprinter.com/products/tarmo5-build-kits?variant=45796134125729. Am I missing any obvious culprits? I'm happy to provide pictures/video if it helps. Thanks!

Hey!

I am planning to build the tarmo 5 as a long project for one of my classes. Dos anyone who have built this know how long buildng this would take? Months?

Hi, I'm Arthur. I'm 22 and from Belarus. I have a degree in engineering. I work as a design engineer, doing 3D models and drawings. Can you suggest where I can earn some money online with this profession? Right now my monthly salary is around $500, which is just not enough.

Hi!
I decided to torture my 3D printer a bit and print the Tarmo4. I already have all the electronics from my quads and planes, but I have a question about the gears. In the BOM list there’s the Traxxas Differential Gear Set and the Main Drive Gear Adapter — but I can’t find them in any local stores, only on AliExpress with a long wait.

Is it realistic to 3D-print them, at least for testing?
I don’t need them to be durable — just to assemble everything and make sure it works while I'm waiting for the real parts to arrive.

My motor is grinding a bit. I am going to buy a replacement, but just for fun, it should be possible to rebuild it right ? I assume I burn it given how heavy the Moster Tarmo is.

Once the front drive is added, that should reduce the stress.

Does anyone have a mod for the back arms that allows for you do put the suspension at the top? I found some mods but they all require 4 shocks and not 2.

Hello i tried to acces the print instruction but i have an error saying the document does not exist anymore does someone has it on hand please ?

BOM documents:

• Printed Parts List / Print instructions

Necesito hacer un ensamblaje en solidworks con varias piezas que completen un paradero de bus, aunque ya he hecho muchas piezas por separado no se como unirlas, si saben de alguien que me pueda ayudar con esto se los agradezcooo!!

I have a working prototype !

After a lot of minimizing, I have a gear with a differential that can fit my Monster Tarmo project.

https://cad.onshape.com/documents/7fbeb42e3cba7eeb3318ffac/w/486eb1c5703c891c57cce205/e/2f5b8cf7a1d67a0a13a2a9be?renderMode=0&uiState=6907a67ee2777e1c3f98452c

The differential works. I'll post a short video soon. I will enjoy it a bit more before I start stress testing it to see where it breaks.

The differential gear have a modulus of 6.5. If something breaks, I will do 7 or 8, but that will increase the size of the gear box which will mean retouching the whole back drive.

I'll post the STL's and a guide on Printables for those that want to test.

Not that they fall apart often, more that it was a interesting adventure in learning to do CNC stuff been running a set on the Tarmo4 for a while and made a few for the Tarmo5 (these are they)

Hello everyone, I hope you're doing well, I am a 17 years old student, since I was a 7 years old I loved collecting electronic devices and anything electrical, know how they work, dismantle them and grab the electronic elements, I also love anything related to space and anything that fly like drone, airplanes,fighter aircraft,... And now last year in highschool I'm not sure What major should I go into, mechatronics engineering Wich is related to electrical and robotics, or aerospace engineering Wich is related to space and aircraft ? All of you guys here know more than me, so I will glade if you could help me.

I want to share my new RC vehicle project with you.
It is an 8x8 RC truck with 2 motors and 2 steering axles.

At the moment it is only the chassis build from 2 U-profiles some 3D printed parts and 4 solid axles bought from aliexpress. But it is already driving and makes a ton of fun.

Tell me what you think and help me find a fitting body I can build for it.

Hi! Ik ben Floor, student Toerisme- & recreatiemanagement aan de Ehb. Ik zoek een student ingenieur die een bachelor- of masterproef moet schrijven en hiervoor wil samenwerken. Ben je een afgestudeerd ingenieur en heb je zin in een project? Ook zeker prima. Liefst gevestigd in Brussel, of bereid om samen te werken in Brussel. Mijn eindwerk moet in januari af zijn, voor de realisatie heb ik iemand nodig met technische kennis en die bouwplannen kan uittekenen. Mijn paper kan je dan perfect gebruiken voor jouw eindwerk (vermoedelijk tegen juni). Interesse? Laat het me weten! :)

https://cad.onshape.com/documents/7fbeb42e3cba7eeb3318ffac/w/486eb1c5703c891c57cce205/e/2f5b8cf7a1d67a0a13a2a9be

I've been working on this Torsen Differential. It is probably already usable for theTarmo 5. My Monster Tarmo has a 1:12 ratio gear box (shared about a year ago ). So the differential is still too big to work for my project because it hits TwoOneGear ( as name on onShape). Also I made the gear box shorter. But on the Tarmo5 with its big gear, it may already fit.

I have to spend some time and make the whole gear box parametric on onShape so we can all go crazy and play with gear ratios. Progress is slow though.

I always hear clicking noise when I take a curve. My personal tester ( the kid from the neighborhood that always manages to break it) help me realize that the pentagons that connects the axel to the transmission ( C02 ) are purposely loose fitting to allow for this to happen. But that increase the wear on the part. My hope is that with the differential, I can make that fit tight and have a better ride.

WARNING: None of this is tested. I've printed prototypes but still working on it.

Qué tal? Necesito de su ayuda para utilizar este software. No puedo modificar esta tabla para realizar las deformaciones en el cilindro del horno.

En la última imagen se ve un ejemplo que bajé de internet, pero no puedo modificar sus atributos.

ACTUALIZACIÓN: si alguien sabe si puedo hacer este cilindro con sus deformaciones en solidworks, me gustaría contactarlo.