GT production update January 14/ 2022

Lia

@lemur Oh damn that doesn't sound good. Hope everything is okay.
I assume this livestream was on FB?

Lia

@lemur Just been informed disconnecting the BMS bricks it!

NotSure

@lia said in GT production update January 14/ 2022:

@lemur Just been informed disconnecting the BMS bricks it!

Edit: Confirmation

oh shit that's fucked now! thats really bad news... i'm guessing a cr2032 won't quite do it either. servicing just got way trickier.

Lemur

@notsure Maybe there is a procedure or "keep alive" dongle that keeps the controller/bms alive during servicing?

Lia

@lemur Maybe, I wonder if they pop the MR30 connector for the charge port off and conenct into that to retain power or connect up to the test pads somehow.

At worst I guess they just deal with it and re-flash it during re-assembly.

Sirgu

No overreacting but heads up with the first make GT's!
https://www.youtube.com/watch?v=zr_5G4nboUg&ab_channel=FloatCarveRide
This would be just another brief ghosting video if not to remark this part of OP comment:
" - ... the GT did roll several times and once it landed right side up the motor did not disengage and it continued to take off as you can see in the footage. ... - "

MacIak

@sirgu Damn! With that kinda power and accelleration who knows what will happen in traffic!!

Sirgu

Lots of GT ghostings get registered in FB these days. Surely, gotta stay critical in context. As some might be just bummering for fun. But guess yourself:

To put that in comparision -- really feels like this (seemingly less tested) concave front pad has some disagreement with 33°F [~0°C] conditions down to material wise. As this seems to be common line with all somewhat reasonable posts.
-> Surely the thrill is overwhealming out of the box .. but with all those stated experiences now .. I'd suggest bringing this thing to a first ride out in a wild priorly. For multiple times AND variable conditions. Before ever ... EVER .. ride it in urban structures.

EDIT: By the time I finished this forum post of mine "8 comments" turned into 51 comments @FB.

Lia

@sirgu What… damn that is terrifying!
I feel like FM managed to anger the production gods. In making a board harder to repair to save their image on faulty mods they in turn created a single wheeled reincarnation of Christine thats evidently out for blood.

I joked to Float Carve Ride I’ll be keeping mine on a lead but I think I might now.

In the cases I’ve seen or heard of these have been irregular dismounts. Float Carve Ride did a quickstop and Zack here fell off while it was moving. It sounds like the only way to really prevent this is a standard heel/toe lift to force it to disengage before the tail drops. That being said it won’t do anything for Zack’s case nor is it acceptable to fear a runaway board.

Sirgu

@lia said :

... a single wheeled reincarnation of Christine thats evidently out for blood.

LOL, I don't get that reference.

But yeah,
... I haven't spotted anyone to claim failed heel-lift dismount attempt so far. (Which is the remaining favour to front concave pad & sensors not to be the case of particular ghosting issue.)

I'd really loved to see some GT owner to do the test as following:
1.) Go for a steady LONG ride in equal/below 33°F/0°C temps.
2.) With stubborn cramped ankles ride straight off the 5+miles/8+km WITHOUT ever heel-lifting / off-dropping / dismounting of any kind.
3.) Then moderately breaking down to 0 mph/kmh and attempt heel-lift straight on spot.
-If the reaction "wtf?!..it's not dismounting!" is not present, then the front pad & pressure-sensors will be forgiven really.

Thus leading us to the guess, the demon lies in board electronics, accelerometer etc ... because, yes, all of them have been irregular dismounts / power-stops (with board roughly angeled while tire momentary wheelslippin' on the ground).

Lia

@sirgu said in GT production update January 14/ 2022:

LOL, I don't get that reference

Film about a car that's possessed and hunts people.

I feel the ghosting is much like when someone fails a griptape change and causes at least one sensor to stick active. Guessing in the cold the pad might shrink a little and keep a side active because it doesn't deform back as quick.

It could also be due to the new sensors, which if that's the case is pretty bad considering similar sensors have been used in the DIY scene without much issue even on kush and concave pads.

biell

@lia and @Sirgu It is a film to be sure, but to internalize the horror of it all, it is helpful to know the film is based on a Stephen King book of the same name.

Lemur

@lia Possible problem with GT hall senor wires.
While I had the Gt stator removed to do the XR rim conversion, I noticed the hall sensor wires are really close to the end plate, which is part of the wheel and spins, possibly damaging them.
Compared to the XR stator the hall wires are sheathed and glued down, very poor workmanship on the GT.
I tied mine down with braided fishing line and super glued the knot. stator 2.png stator 3.png stator 4.png

Lia

@lemur That's a little concerning. I wonder if that was an assembly error or the process changed and this is the "new normal".

NotSure

@lia holy shit! do NOT posi ur GT!

https://www.reddit.com/r/onewheel/comments/tf3z5k/gt_ghosts_at_top_speed_and_nearly_takes_out_a/?utm_source=share&utm_medium=web2x&context=3

MacIak

@notsure Im afraid when this kinda news will catch the attention of our anti-pev politicians (casically all of em are) there's gonna be an active hunt on all OW users.
They're basically waiting for this kinda news to prove their point...

Lia

@notsure I saw this vid, was that posi'd???
Posi-ing a GT under current circumstances if a deathwish, not for the rider but some poor sod downwind.

I have a few spare footpads, I may just find a way to use one of those instead. Was considering having my board on a rope for a while but thinking back to the days of owning a rottweiler and having it drag me round a field I may rethink attaching myself to 750w of feral electronics.

NotSure

@lia said in GT production update January 14/ 2022:

I saw this vid, was that posi'd???

i dont know actually but i reckon that dent n those children screaming "omg im so glad no one got hurt" was for good reason lol. its a completely new product. i think it may not be safe to treat it like an XR just yet. hopefully its just another fluke.

Lia

@notsure At this rate I'll be treating it like a domesticated yet badly trained grizzly bear xD.

I assume the footpad connector is the same as the Pint. I might rig up a little testbed to put my footpad on and see how it reacts to various conditions like temperature, dismount and semi-dismount methods. I do have to get my hands on it first though.

At least this way I don't have to try it on a live environment where an actual failstate results in a single wheeled freight train hauling ass whichever way I left it.

Lemur

@lia I was thinking of a leash, but don't know if the GT would shut off if the board is tipped over on it's side. Our vesc boards can be programed to shut off anywhere from 0 to 90 degrees.
I'm also thinking of a wood or printed front footpad with less concave and using fsr 406 sensors. Those sensors have been performing flawlessly in my vescs and XR.
Fm advises to use simple stop or heel lift for now, but that sucks.