Showroom DIY force feedback steering wheel, using DC motor. based on MMOS

hello all around the world

after reading, lerning, and much searcing on google and youtube, i decided to build my own force feedback steering wheel based on MMOS as cheap as possible but maybe strong enough to play with.

its actually my very long project more than a year ago, start trial and error using stuff around me, and decided to buy second hand motor ex electronic power steering.

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for driver, i m using STM32F407VET6 and using st link v2 for flashing the MMOS firmware.
to drive the motor, using BTS7960 and 24V 20A switching power suplly.

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for begining i m just using scrap wood to be a base for steering whell and motor mounting, and using 1.5" : 4" V type pulley for increasing the torque to steering wheel from motor.

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for rotation sensor, i m using photoelectrick sensor from printer.

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for pedal i m using EMC V0.9 for arduino leonardo

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it's little bit messy but it works well for me...

and here is power consumsion test using AC power meter



and this is some more DIY part...

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UPDATE:



UPDATE 2:

torque test

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for more update, you can subscribe my youtube channel...very big thanks for all...

Great project - clearly a lot of thought has gone into the design. May I ask what type of car the power steering motor is from?

i dont know...i just straight buy it from local online shop...i think they all almost the same, the different only from shaft lengh, diameter, and inner spline...

the speed and torque almost the same...but if you wanna more torque, you can make bigger ratio...

more update:


more photo:
avoid this type of board with this chip code if u buy very cheap clone board...its useless for me


this one work fine for me till now, and it run over 500 watt with no problem


heat is big enemy for electronic stuff, cheap thermal paste will help (dont use liquid metal)


and small cooling fan will be great



if you have trouble with firmware upload for arduino leonardo

if you interested in building your own wheel, and you confused what type of microcontroller board you can use and perform better....

just check this out...


if you want the rest of the chart log, just sent me a message or comment...

another DIY force feedback steering wheel software and firmware alternative for arduino leonardo.
the software called EMC utility created by EBOLZMAGY. if you interested go straight check em out in ebolzmagy youtube channel https://www.youtube.com/user/ebolzzable

last time i tested it and it works great, very suitable for small torque DC motor, it will give you small detail from the game.

when i first time look at the UI setting, it looks complicated if compared with MMOS, but actually thats the pros. you can set the detail of FFB you want depend on your hardware and your comfort, gain setting based on type of signal wave/signal type. if you want detailed on damper rather than wheel binding, you can set the damper up and constant down, or whatever you want.

and it's when i tested it

maintenance time...and some mods....
take the motor appart and drill the housing for better cooling...




housing after drilled...

@ahoenksiluman Nice work and testing. Did you switch to arduino/EMC? Or are you still using stm32/MMOS? I do like the look of those options in EMC.

for now i'm still using MMOS for wheel and FFB, and EMC for pedal, shifter and button...

some update and improvement...
make better cooling for DC motor...



small hole does't hurt for motor, and it will make better cooling for rotor in the inside...

just build another driver controller box with different microcontroller board, i'm using STM32F407VGT6 and its work perfectly just like STM32F407VET6 or discovery board...

and this is how i build that...

Hiya @ahoenksiluman big favor to ask , been trtying to register on various sites to download MMOS software etc for trial build of my DD FFB project , not having much luck as RFR france seems to have closed registration for new member and VR racing cant get past new member registration page , im going to try the EMC version but have to ask you and any other member where i can get the relevant Files Attached Files

• Connection.zip (230.4 KB, 4143 views)
• MMosFFB_FW_0.99.2.zip (33.2 KB, 4206 views)
• MMosFFB_Tool_0.91.zip (114.0 KB, 4998 views)

Got near enough all the parts hardware / electrical but stopped becuase i cant get Firmware or Utility software :-( sorry to jump in on your post but had to ask

MMOS 0.99.2
https://drive.google.com/file/d/1QOFo-JLrwtHHDJ201LamRONU7pNS9P_p/view
https://drive.google.com/file/d/1CGy6KJeZTVLHOqIdAvsbS7e8_E9EhUTU/view





Is there pwm dir mode connection pin out from stm with mmos anywhere?

That's nice.

Hi @Sieben just wondered if you knew why toothed belts are not used in stead of vee Pulley 's am sourcing the last bits for Both DD projects This type and Hoverboard Brushless motor options . so wondered about belt / Pulley choice Cheers is it Noise , Vibration , Cost etc Thanks

wannabeaflyer2, Belts must be not a noizy thingies. They are used, guess depends on the type of the belts/manufacture, don't know. Although for someone there were some "steps" reports on operation. V's as I get it, can do some slipps, and safe a motor, for someone. Don't know. I recon both of'em are used with great success. )

And chains also

Hi @Sieben really appreciate the response , im ok with mechanical stuff but electronics take a while LOL always learning there always shifting the goal posts LOL i'll chance the toothed belt option on my FFB hybrid and let you guys know how it goes , Not started a post yet as im still taking photos of the Both builds but once I get to Electronic assembly then i'll start putting the post together ..

another day another build...
try to making steering wheel base using small motor from scrap car wiper motor, works great but need more ratio to increase torque...

Hello ahoenksiluman.
Is the SVPWM(BLDC) option actually working in MMOS?
I read in another thread it is indeed unimplemented