The "Ankle Wreacher" Stooge v5 SN28 Build - Tires n' Stuff

@Heathlewis
lock in :grin:

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0 - 5.0 mph up next🤞

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:speak_no_evil:

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giphy

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@Tony_Stark missed a beat here when naming RTS :joy:

What is TITS?

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Haha yeah i figured that much, i was hoping for a more detailed explanation :grin:

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Im guessing more power to the outside wheel

TITS has an additional letter so it’s 33.33% better

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but RTS is only 25% less. pocket the difference.

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Is the name of this board a combo of ankle “wrecker” and ankle “reacher”…?

As in…

“reach” for your ankles… im about to “wreck” my ankles

The software mountain climb begins

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That’s A LOT of processing power :eyes:

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Super exciting. Will the goal be to increase traction on loaded wheels, or add power steering or some combo?

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:man_shrugging:

Overbuilding the hardware so I can experiment with whatever I want in software :grin:

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Haha right on. I wonder if you could make an electronic steering damper by tying a diagonal torque split to a gyro measuring the rate of lean.

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Very interesting idea, worth experimenting with!

Same vein as antilock braking and traction control… still unsure if my hardware will be fast enough to form a meaningful closed control loop. I’m expecting my main control loop to be running at 50~300Hz (tbd), so CANbus loading is probably going to be the bottleneck🤣

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Maybe! But if rider motions or a speed wobble only happens in low single digit Hz, maybe you only need low double digits refresh rates to resolve it accurately. Latency would definitely be super important for a damping operation, though

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@tuckjohn you are nuts man. I just read through this entire thread in one sitting… what a journey.

I found my way here because I think i am having a similar issue to you with the iron losses.

I originally got these for a build that I was doing at 15s. The build was good, but I felt like the 7490s were getting crazy hot and thermal throttling… pretty quickly i switched to 6495s and it seemed to solve my issue immediately.

I was just re-working one of my builds which is at 12s so i figured id try pulling the 7490’s off the shelf again.

this board is
12s
(2) 7490 @ 179 KV
16t motor pulley
68t Wheel pulley
193 mm wheels

when out for a ride the other day, it seems to run great. but after a while of riding around pretty hard, i came to a stop and then tried to go again and there super limited power.

I took 2-3 minutes to pull open the smart bms app and the vesc tool app. Nothing really seemed off, so i hoped on the board and got full power again.

It sounds pretty similar to what you described.

however with my much lower KV, I would think that I might be able to make it work.

I realized in vesctool my thermistor value was wrong so I updated to B3950. I was planning on bumping the temps to 100c and 115c also to see if i can get what I need out of the board.

I am not racing the board. just cruising around 25-35 mph. and some light offroad.

I am curios if you have any advice other than upping temps and fixing thermistor value.

if I cant avoid thermal throttling, then i guess my plan is to grab some reacher 6485’s. Its that or dust off the flipsky6385 that i have sitting in the closet.

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