@b0ardski said in Introducing Onewheel+ XR:
@JeffFrick said in Introducing Onewheel+ XR:
@Future-Motion > It's been three years.
Great product.
Pint had it's time.
When the OneWheel+ XR** 2.0?
(easy sustained 20 mph, + another batch of miles to the range?)
...footpad led, simple stop option, pint style battery box protection on fender/delete, better connector housing, tire options, pint/XR pushback option, better water protection,
don't hold your breath.
From the sound of it, FM may have been consolidating it's EV-MFG infrastructure since the Pint. Possibly with the intentions of leasing their infrastructure to other manufacturers. If true, it's smart bc it permits a broader product base to hedge their risk. That lowers costs, which increases profits, which in turn permits greater diversification of their own product line. It would also have provided a long RnD cycle to develop the next iteration of the Onewheel.
Considering how polished the Pint is, I would not be surprised if a new XR is actually quite far into development. Well past an initial prototype. 100v batteries are a thing now, and a 1000w hub motor probably wouldn't be all that out of the question. Just a matter of engineering.
@blkwalnutgrwr Nice one! Shame I missed it but thanks for sharing the screenie~
Seems like you and Frank are going to be racing eachother up the ranks now ;)
A place to discuss technical questions and answers
819
Topics
7231
Posts
So the chip arrived. Same issue...
Looks like it's not the chip then, can't see how 2 alternatives would have the same issue if they were at fault.
Guess I best learn RS-485 signalling and how to use my osciloscope. I'm already down 2 monsters... send help lol.
So I'm now looking to find out if there is any signal coming from the ARM chip.
Below I'm first testing to see if any signal exists on either of the A/B pairs leaving the 16 pin connector to the battery. As you can see I get a noisy non existent signal measuring peaks of only a few milivolts. That's 1000th of a volt, the differential signal should be at least 200mv. In other words... no signal is present.
So I now try to measure before the RS-485 chip to see if the ARM chip is feeding it anything.
I'm seeing a constant 3.2v voltage on the receive pin and constant 0v on the transmit pin. So no signal at all.
So what does this all mean?
Well looking through the specs and how these things work it looks like the RE and DE pins enable/disable transmit or receive.
RE and DE are connected together and wired to Pin90 on the ARM chip. The way this works is when pulled low (no voltage) the receive pin is enabled and transmit is disabled. When high the receive pin is disabled and transmit is enabled.
This way the chip can only listen and not transmit or vice versa when instructed to by pin90. Hence the chip being listed as "Half Duplex" (Half-duplex devices can only transmit in one direction at one time).
Because of this it makes sense there is no output on the A/B pins as there is nothing on the circuit sending a signal (as I have the battery removed).
I assume RE is pulled high at 3.2v constantly is because it requires a signal coming in on the A/B pins to pull it low to create a signal, like below. (Linky)
With that all in mind I assume once the battery sends a signal to the controller RE/DE get pulled high meaning R goes to 0v and D should send a signal causing A/B to show data in a differential pattern. This is how I believe it should work, assuming I'm correct I can start picking apart the data and find WHY it doesn't communicate.
I've reached out to another redditor that said they work with RS-485 to see if my assumptions so far are correct before I connect my battery and try reading what happens at each pin.
If anyone is interested in this I've linked below some resources I was using to try figure this out.
RS-485 Serial Interface Explained
RS-485 Transceiver Tutorial
ST1480AX Datasheet
How do I measure differential signals
.
Not giving up on this, there has to be a fault and a fix/bodge I can do to rectify this! I refuse to let this legendary controller bite the dust.
Pre-covid I was planning a 6 month+ road trip across the US. I'd just secured my visa before the situation started to spiral and I decided to take a rain check.
For later in the year if I'm lucky, or more likely next year, I'd like to bring my OneWheel XR+. Now obviously this can't fly with me, so how does one ship items with batteries? Is there a boat based shipping process I can transport the board with?
People do this for repairs at Future Motion, right?
Got a great idea for a new Onewheel feature, improvement or accessory?
300
Topics
2605
Posts
@Senior-Coffee said in Waiting for the next board....:
Good idea, I forgot about suspension. After owning a number of EUC's without suspension and a couple with I can tell you that I think it would be positively received.
@Senior-Coffee Someone over on Reddit noticed FM put a new patent up for suspension. This being very different to their prior patent.
https://patents.google.com/patent/US11123629B1/en?inventor=Kyle+Jonathan+DOERKSEN&sort=new
Does give me hope a new board is actually coming. Curiously the overall design of the board in the patent images looks like a mix of the older gens and the Pint.
