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tjfenwick / DIY-Sim-Racing-Active-Pedal

This is my Sim Racing DIY Active Pedal prototype, an affordable alternative to the official Simucube pedals that cost over $2,000 per pedal.
MIT License
270 stars 59 forks source link

Hardware design suggestion #2

Open ChrGri opened 1 year ago

ChrGri commented 1 year ago

Thanks @tjfenwick for his awesome design. To support this project, let's collect and discuss some hardware realizations to potentially improve the original design.

Loadcell rod: The original design is 3D printed and I'm not sure how it will last over time. Since the loadcell already has an M12 thread. Use a short M12 threaded rod on both sides of the load cell. At the end of these threaded rods, use M12 ball joints, e.g. https://amzn.eu/d/eeJQwHZ to replace the 3D print and ball bearings.

Body, guides, and lead screw: The original design is 3d printed. Of the shelf modules for CNC machines might be applicable here, see e.g. https://a.aliexpress.com/_Ez9AyIL

Pedal: Use 2020 extrusions, e.g. like on this pedal set https://www.najam-simtec.de/i/k2x-pedals

BR Christopher

ChrGri commented 1 year ago

I've made a construction from mostly metal norm parts. Parts are already ordered. Going to test it soon. ActivePedalV1 v30

tjfenwick commented 1 year ago

Nice, I like how the motor is mounted below the pedal hing point to prevent interference. I have also considered adding in the linear rails for additional support but haven't to try an keep the cost low.

Let me know how this design works when you get it moving!

ChrGri commented 1 year ago

I hope to have the working prototype ready by the end of this week. Will report asap.

jjzurro commented 1 year ago

Hi guys, I really like your project. I don't know how far it can go (car profile simulation, abs simulation, etc), but I love it!!! I'm a total noob, but maybe it will be a better result using a bldc motor with and esc controller. there is a lot of videos about the fast response, readings precision and torque.

I hope it can help you

kiss81 commented 1 year ago

Love the design! Looks pretty strong! Any chance you can put a list with the components / sizes?

tjfenwick commented 1 year ago

Right now everything is constantly changing since this is still a very early prototype. Once I get a more finalized design I will put together a bill of materials with links on were to buy everything.

ChrGri commented 1 year ago

Once the electronics and software are done, smaller components will be tested. PXL_20230428_120750541 MP

jgbbob8 commented 1 year ago

Once the electronics and software are done, smaller components will be tested. PXL_20230428_120750541 MP

Very nice, and well resolved the size of the motor under the pedal in the area of ​​the heels... great idea

jjzurro commented 1 year ago

Hi everyone! I love this project and I want to help and build it!!!

-Did you though about including an eeprom for the project for custom profiles? (or maybe a stm32, that is faster than arduino , also have HID library and have more of everything), I think it's the final goal of having those kind of pedals, to be able to load a specific profile for a specific car....

-I found this, it could be a good cheap option:

https://www.aliexpress.com/item/32955790850.html?spm=a2g0o.productlist.main.111.60dd59a7hQWP1u&algo_pvid=e5d30f50-8522-45b6-a288-45020817f6b7&algo_exp_id=e5d30f50-8522-45b6-a288-45020817f6b7-55&pdp_npi=3%40dis%21JPY%212704.0%212704.0%21%21%21%21%21%40214527fd16830000706746729d07b7%2112000023008795451%21sea%21JP%211775284287&curPageLogUid=z44XgnDlQQIp

or this https://www.aliexpress.com/item/1005004022886871.html?spm=a2g0o.detail.0.0.3c51b54cbxAABj&gps-id=pcDetailFavMayLike&scm=1007.14452.331081.0&scm_id=1007.14452.331081.0&scm-url=1007.14452.331081.0&pvid=f8129fcf-567c-476d-aa4f-3bb2ed79967b&_t=gps-id:pcDetailFavMayLike,scm-url:1007.14452.331081.0,pvid:f8129fcf-567c-476d-aa4f-3bb2ed79967b,tpp_buckets:668%232846%238110%231995&pdp_npi=3%40dis%21JPY%215672.0%213913.0%21%21%21%21%21%40210324e516830010253947058eb333%2112000027776359282%21rec%21JP%211775284287

Also, it could be a very good idea to have a discord channel to discuss all that stuff. Have a nice day!!

AyrtonRicardo commented 1 year ago

Once the electronics and software are done, smaller components will be tested. PXL_20230428_120750541 MP

@ChrGri mind sharing the dimensions of the profiles? I do happen to have enough alu profile near me and I want to try out the design.

bbbkada commented 1 year ago

They have a 3d .step file for download on their wesite, if someone wants inspiration. by the size, of the motor, I guess they have a 130w ?! My uploaded file online Autodesk view, will be up for 30 days if you want a quick peek. https://autode.sk/3NANJBC

ChrGri commented 1 year ago

@AyrtonRicardo Sure, I've used 2020 V-Slot profiles, which I had laying around as well. The CAD model has been uploaded to the fork: https://github.com/ChrGri/DIY-Sim-Racing-Active-Pedal/tree/main/CAD/FromNormParts_V1

However, this is how the current design looks like: PXL_20230505_060354625

These ready-to-go CNC modules are surprisingly cheap.

ChrGri commented 1 year ago

So I've tested the initial version of my custom PCB design for the ESP32 S2 Mini and it's working beautiful. Here is a picture of it mounted to the pedal:

PXL_20230526_101744611

It's going to the rig next.

kiss81 commented 1 year ago

So I've tested the initial version of my custom PCB design for the ESP32 S2 Mini and it's working beautiful. Here is a picture of it mounted to the pedal:

PXL_20230526_101744611

It's going to the rig next.

That's looking really nice! You already got it working as 'joystick' input device as well? A video would be really nice to see it working. Might copy the whole design and build one myself! It would be really nice to make a control panel for windows to tweak the pedal / curve etc.

ChrGri commented 1 year ago

@kiss81 yes, joystick output is working as well. The cycle time is currently approx. 130 micro seconds, which is already pretty solid.

I will try to make a video later that day. I'm gonna try to write a Simhub plugin next.

kiss81 commented 1 year ago

That;s serious progress @ChrGri ! Looking forward to the video!

ChrGri commented 1 year ago

@kiss81 Thank you :) Here is a screenshot showing the joystick output from the pedal and a video showing it in action.

image

https://github.com/tjfenwick/DIY-Sim-Racing-Active-Pedal/assets/21274895/4f2327b7-4ec6-4d88-8ae2-2e65f62bca9d

Ibakha commented 1 year ago

I don't know if the necessary torque was calculated. I was planning on looking at it this weekend. But if you can place the maximum course in the middle. Is this motor strong enough to hold in place and possibly fight back if the abs were implemented?

kiss81 commented 1 year ago

@ChrGri that looks so useable allready! Anything that needs more improvements? (except things like a pedal plate and configuration panel) @Ibakha ABS feedback would be really nice. Not sure how that feels / what happens in a real race car if it kicks in?

ChrGri commented 1 year ago

@kiss81 I drove iRacing yesterday for an hour. Pedal felt awesome, more alive than the passive pedal I have, even though no ABS has been implemented yet.

Currently the pedal seems to skip some steps and loses its neutral position. So after some driving the pedal tilts more and more towards the floor. I will try to find the reason for this next.

kiss81 commented 1 year ago

So cool to hear! Hopefully the motor is not too weak... Any idea how much pressure you need now to hit the brakes 100%?

Ibakha commented 1 year ago

@ChrGri Do you have an updated version of your CAD model? I am modelling the pedal with these, which I think you are using. I'll have someone looking at my math this week, but I'll try to upload an Excel to calculate the minimum torque needed depending on the geometry of the pedals. Maybe I'm worrying for nothing, but it annoys me.

@kiss81 I don't know if it's different in a race car, but I'm pretty sure the reaction of the pedals is similar to your day to day car. Where the brake pedals is pushing back as the ABS releases the brakes.

kiss81 commented 1 year ago

@ChrGri @Ibakha I just had the opportunity today to drive the simucube active pedals on brake and throttle. The ABS indeed felt really like a road car. You could feel the ABS ON/OFF to keep the tires rotating while the ABS was active. The Throttle felt kind of nice too, but hard to explain what they did actually. Need more time with that.

ChrGri commented 1 year ago

@Ibakha You can find the CAD model of my previous version here https://github.com/ChrGri/DIY-Sim-Racing-Active-Pedal/tree/main/CAD/FromNormParts_V1. But I don't have an updated CAD model with the CNC module. I've ordered this (SFU1605, 100mm travel), but it should be identical to the ones from other sellers:

https://www.ebay.de/itm/393149454745?mkcid=16&mkevt=1&mkrid=707-127634-2357-0&ssspo=rgcaefgvrgm&sssrc=2349624&ssuid=6twGLuBEQmS&var=662086958084&widget_ver=artemis&media=COPY

Regarding the force, it's always good to have some kind of analytical model to verify the selected parts. Keep in mind, that you do not really need to apply a lot of torque to block the spindle from turning and therefore stop the pedal movement.

@kiss81 regarding ABS and TC effect, I'd simply start with additive sine wave to mimic the effects and check how that feels.