Posts made by Lemur

@lia You can also do software "posi" with FFM if your GT has not been updated.
Just need the Gt encrypted ota file.

I went backwards with my Gt/Ubox 100 build..
I switched out the SF motor back to the Hypercore motor although the GT motor now has a 6 inch rotor, 14 bolt end cover with an actual oil seal. Special axle blocks were made to center the wheel.
This is not my main ride and the extra 5 lbs of the SF is not worth the torque gain. I'll save the SF motor for another build.
The Ubox 100 has been updated to 6.05 "no limits" firmware and refloat.
The external yellow XT90 connector is a quick disconnect so the battery is not connected in storage to avoid parasitic draw.

@lemur I've since updated the Ubox lite firmware to 6.05 "no limits" which allowed the Ubox Lite to have an higher maximum input voltage from the hard coded 95v to a higher value, in my case with 22s at 103v.
Hopefully that will avoid the regen voltage spikes that will ND with the 95v input.
The best feature with 6.05 firmware is the hill holding setting that matches a OW board, the vesc board is no longer rolling away on a slight incline.

I survived the test ride on my fresh vesc build.
New Ubox Lite, 22s1p 42 A cells , Maxkgo 30s bms and out of percaution I only charged to 90 volts instead of 92.4 volts and kept my speed to 16 mph for now.
I had a warning on Float control about maxium motor voltage being too low but I couldn't change it as I believe that 95 v max is hard coded in the firmware, I not sure if a "no limits" is available for the Ubox Lite.
I had a strange buzzing and harmonics on rocking back and forth on Refloat but smooth on Float, I have to check into that.
This build was against all advice, but if you don't try, you will never know.

@weno66 Picture posted in one of your requests.

@weno66 Here you go.

@weno66 I had a diagram somewhere, I'll try to find it.

@lia Thank you!

Re: Building a updated suspension board
I fabricated a few more pieces for my third suspension build, the controller box I may use is a printed one with a Ubox 100 in it , but things change as the build comes along and the rails are longer than stock to fit a larger tire than the Pint size. The swing arm pivot is stainless steel and self lubricatig delrin bushings.
I'm presently looking for an high end bicycle shock, even better than the Mazocchi air bomber, as I believe a top tier shock is the secret for any suspension, be it a car, motorcycle, bicycle or even a one wheeled balance vehicle.
Pictures of my 2 completed and partial suspension builds. Top one is XR controller based, middle is Thor with 20s2p battery.

@weno66 When you say m2t mosfets, did you mean m8t mosfets?
When you get high and low cell voltages on adjacent cell groups usually it's a m8t mosfet.
There are 8 mosfets controlling 15 cell groups, but #1 m8t mosfet controls only one cell group.
Best bet is to get the bms repaired at Atlowshop or source a good working bms.

Watch Floatwheel's video before it gets taken down.

@lia I'm not sure what the op did, something reversed or wired wrong.

This was on discord and I had to share, all by the same person. I do have permission to share these pictures.

@lia Great to see your work of art getting the recognition it deserves from Kyle and FM!

@loaffette NP.
Go for it.

Much like the Pint sub board, the Gt sub board can be used to convert your dead GT to vesc.
Mine came from a traded in GT controller that had shorted mosfets and caps and it wasn't worth the time and effort to repair.
You can add pulldown resistors 5k-10k to the adc's to ground if your vesc does not have built in resistors.
The ground trace has to be cut just like the Pint sub board but they are in different areas.
You can connect wires to either the motor connector backside or the 10 position terminal on the bottom right.
As always please check your work before plugging anything in

@loaffette 12 volts may be too dim as when the Xr boots up, the white leds voltage shoots up to 18v and drops down to 16v. I mentioned 14 v just to be on the low side.

@loaffette The red leds run bright at 8v and the white leds run at 14v on my variable power supply. Although they can run a volt or two higher, but 8v and 14 volts are safe

@loaffette I can't remember, but I believe each color runs at a different voltage.
I will find out and let you know.

I haven't had a chance to try it out yet, supposedly shows remaining mileage, headroom etc.
Looks like FM is moving forward instead of stagnating , probably won't mean much to me as I have higher capacity batteries in my Xr, Pint and a smaller capacity battery in my Pint with GT electronics. Not my screenshot, gleemed from discord.