Endless Sphere

The whopping pole count of 42 means you need a 50000 erpm capable controller just to spin the shaft at 2500 rpm. If you go through some old posts here you will find some tests on large Hobby King outrunners demonstrating extreme core losses at high speed. No idea if this is the case with T-motor but...

How do you like the light pattern? Does it do a good job for you in fully dark situations at say 28 mph? Would a second one (800 lumens total) help? In complete darkness I'm not confident I could avoid all potholes etc at 28mph. More comfortable at 20 mph. Similar situation for off road. I'm sure a...

Just upgraded my front light recently to the following from Grin: Roxim X4 Ebike Light https://www.ebikes.ca/shop/electric-bicycle-parts/lights/roxim-x4-ebike-light.html I've been using that Roxim one for about two years now. Not the brightest light out there but a very sensible output for urban ri...

I haven't used the maytech one but if it is anything like the Flipsky one it means the lid on the case has an O-ring. The pcb itself won't have any conformal coating and water can still track inside the case through the connectors and wires.

What about ditching the extender pack bms and parallelling all the balance connections between the old pack and new. Effectively making one big pack controlled by the Bosch bms, which is presumably of higher quality than the one on the extender pack. It would require modifying the Bosch battery (whi...

Unfortunately on the vesc the brake/reverse mode doesn't function as a cutoff. Instead the commanded motor output is the brake value subtracted from the throttle value. So if you do full throttle and half brake, you will get half throttle. Maybe when you hold both the throttle and brake, the throttl...

I use ADC1 for throttle and ADC2 for brake and splice into the gnd and vcc for the bluetooth.

In vesc tool are your adc voltages noisy and jump around a lot?

Measure the resistance between each phase and supply positive and negative. If any are short circuit the mosfets on that phase are blown.

Did some stuff on the bike so time for an update. Had a chain drop recently. My fault as I was in a rush to adjust chain tension with the chain roller. Didn't loctite the new bolt and it came off a couple of weeks later. Unfortunately the chain jammed after falling off and the end of the shaft got b...

I second the DT Swiss freehub body design. It has an axial ratchet system, that provides more surface area and engagement than most others on the market. They are very easy to disassemble and rebuild, since it's only 2 springs plus two of the ratchet rings, minus the splined cassette body. Only dra...

Genchichik wrote: ↑

Sep 05 2019 3:44am

I tried to connect, it doesn’t connect, I tried all the options, Asi says that the one who set up the controller somehow blocked it for writing (ERT) to end users.

If true that really sucks . Surely there is a way to restore the controller to default?

Genchichik wrote: ↑

Sep 01 2019 6:40pm

because I can’t change the settings, bac is configured for 16 s battery only, but I want to use 20s, ERT does not support

Are you only saving the settings to ram in bacdoor? You need to save to flash as well if you want the settings to persist on reboot.

Price aside, I feel the vesc controllers don't make sense for DD hubs due to the lower voltage limit. Plus there are so many other controllers to choose from that work great with hubs. If you need sensorless or a very high erpm for your motor and the voltage limit is not a problem then it make more ...

If she only wants a little help for a few hundreds of meters uphill basically any motor shall do. She doesn't look heavy and she won't brake speed records. Why not just stay legal? A q100 or any other hub in an adequate winding shall get her up there. Totally agree. Also the steel frame and forks w...

Then $15 dc converter (72v to 12v) went 72v on the 12v side and blew the 12v coil on the gigavac contactor. Lucky no other damage. Lesson learnt on fusing 12v side and sizing dc converter to FULL pack voltage 84v approx. I've also found that cheap chinese dc-dc converters have a nasty habit of pass...

Wow fancy magnets! Is it very difficult installing them into the rotor?

The 40 kph given by the grin simulator is the maximum speed. No torque is produced at this speed. 32 kph is a more realistic top speed on flat ground.

Another option is a cheap 5v logic level usb serial module like one of these. https://www.ebay.com/itm/FT232RL-3-3V-5 ... SwrklVMjIp

SOLD! For sale is a 10T Mac rear hub motor as the title says. I purchased it in 2014 but only did around 5000km on it as I went mid drive and also played around with other builds. Its the old style motor core so it has 0.5mm laminations and phase wires are not as thick as they are today. It takes a...

We are using Hall sensors ports, Canbus (CanH/CanL) and (5V/-/TX/RX). If you are using an off the shelf vesc then that only leaves the two analog throttle inputs and the servo input. I just gave it a go and compiled a firmware with fault and drive leds assigned to adc_ext 1 and 2 and it seems fine....

Good thing the magnets are embedded in the laminations

I would reassign the led gpio pins in the hw configuration files. If you need to change some functionality of the red and green leds they are controlled in main.c

Also I'm assuming you are posting this question here on endless sphere because the vesc-project forum is down?

Haven't updated this thread for a while but I haven't made any changes to the bike other than switching to 12s as that pack has the high capacity cells now that I need to travel a bit further every day. Without field weakening top speed is just under 60kph which is still ok. Recently the levers on m...

Does it have to be direct drive? I'm about to list a rear mac hub for sale here.

I see a red flashing led on your flipsky vesc. Usually that indicates a fault code which you can view by clicking Terminal at the top then print faults.

The detected inductance value looks reasonable so the hardware itself is probably ok.