“on the fly” as in adjusting while ur still riding? How would you control the linear actuators? 2nd remote?
If not, regular adjustable baseplates will do fine? Its like one screw/nut to adjust it.
Something like this: https://boardnamics.com/product/angle-adjustable-baseplate/
control would ultimately be done by a MCU, getting speed data from the ESC. Power through a relay from battery
The idea is not to have to get off the board , nor even touch anything at all. At first it will likely just be a simple control to the MCU and then later work on a UART interface but thats only if the mechanics work out
Why not just put an adjustable steering damper on the trucks and have a remote adjuster?
how do these work? I saw them on the Race boards discussion.
do they actually stabilize the ride?
DO they just reduce wobbles, or will they actually reduce max lean?
This might just be the answer Ive been looking for…
THis has been done and discussed.
I should have researched first
@MoeStooge uses an electric motorcycle steering damper on his race boards at a fixed voltage. It might be possible to vary this voltage with suitable electronics.
I imagine that someone who has their shit together (ie not me) can jury rig it with a microcontroller to vary the voltage based on either the speed of the wheels, or the position of a secondary potentiometer on the rider’s handheld controller
Edit: Stooge Raceboards V-4
Calling @MoeStooge
Which of your dampeners are electronically adjustable? Looks like the v4 board has fixed dampeners?
He uses a Honda cbr1000 steering damper. I think between 5-7v. Not sure if they are on front and rear.
Adjustable dampers, or take the 3 link trucks and put the connecting links on a linear servo slide. As the links move it changes the effective turn ratio.
I’m into this concept! Here’s a quick thought on how I’d approach it.
Using the spur gear you linked, but actuate it with a worm drive on a high torque servo. Probably enough torque to be able to crank down on the nut. This approach also keeps the overall package size fairly compact and could be mounted with a 3d printed jig. Then using @RipTideSports KranK would be perfect because of their pressure-hardening qualities. You could could a large degree of variability with 1.5-2 rotations. Then like you said before, dynamically adjust the nut position (bushing hardness) based on speed with a little closed loop mechatronic system.
Hope you make a go of it!
EDIT- Thinking about it more, the hardest part may be a sufficiently responsive system. Our boards accelerate pretty damn fast, would have to do some prelim testing to see if this system could even keep up. That said, it ~feels~ viable.
EDIT EDIT - lol yep, variation discussed in the other topic on truck angles.
As far as the dampener goes, I dont think this is the same effect. The dampener will dampen the effect. It has inou on the rate of change of the deflection angle, where as bushing hardness is probably mostly proportional to the deflection angle itself
Thank for the mockup! That was my first thought.
@bonesaw.
So the reason I went to a linear actuator was that I guessed at the torque figure required. Even high torque variations of stepper motors (more torque at low RPM) only produce 1.5 NM or so. As a guess or so we need about 50 NM of torque on the nut in its tightest setting. Which works out to a gearing of 60:1 or higher.
This is NOT even a ballpark really though because I made that torque spec up based in intuition alone.
once I get an actual torque figure We will see.
Heres a stepper motor that would be usable. This with an arduino and a stepper shield will make this a simple project. Heres a relevant gearbox. Bit bulky for our purposes But is capable of 1.2 NM times a gear ratio of 20 so about 25 NM
This thing is one 3D printed adapter away from perfection
This is wild. If you pull this off, legend.
Purchased one of these to get my hands on it.
See if its at all feasible to use this. its bulkier than Id but worth looking at physically
and its prime so returns are easy
Got my hands on it. wayyyy too bulky as expected. Ill \post a picture soon. The idea is sound though. 30:1 will be the ratio.
Now its CAD time. Anybody have more experience with this?
I can print stuff out of high grade materials at work. But 3d Cad is not my strength
what do you need help with specifically?
Working out a worm gear / enclosure cad file. I really only use tinker Cad and I’ll give it a shot but I feel like that may be insufficient
I use this for F360
https://apps.autodesk.com/FUSION/en/Detail/Index?id=6294804001663532834&appLang=en&os=Win64
hmm. let me see if I can get a student version
I didnt read worm gear so that link wont help sorry
You can use this
