Onewheel Build Guide

QwerkWerx · May 9, 2020, 5:54pm

I swapped out the MPU like SwarleyAUS suggested.

DavidBanner · May 9, 2020, 5:56pm

and what MPU does your VESC unit have on board? did you check that?

DavidBanner · May 9, 2020, 5:58pm

and please explain what an “external 6050 MPU” is

QwerkWerx · May 9, 2020, 5:58pm

It is a superFOC. It doesn’t have an onboard MPU.

QwerkWerx · May 9, 2020, 6:00pm

An external MPU 6050 is a external (not board mounted) MPU/gyro/accelerator/IMU what ever you may call it. It is attached to the SDA and SCL pins.

DavidBanner · May 9, 2020, 6:00pm

errrr, yes it does

the VESC6 HW design has an onboard MPU or it wouldn’t work

edit: I totally mis-read that and was taking about MCU not MPU -

DavidBanner · May 9, 2020, 6:01pm

I think you may be confusing terms here. the MPU is the Master Processing Unit

edit: nope OP was right, I was the one confusing MPU and MCU here

QwerkWerx · May 9, 2020, 6:09pm

For one can we not get to technical. Look up MPU6050 its a gyro. That is what I’m talking about. This is the vesc that I have.

No gyro/MPU whatever is onboard.

DavidBanner · May 9, 2020, 6:20pm

my bad, I am reading stuff to quickly, I assumed you meant MCU

QwerkWerx · May 9, 2020, 6:27pm

Its all good. Is there anything that you can help me with?

Giga · May 9, 2020, 6:37pm

what i can tell you:

github.com

vedderb/bldc/blob/master/imu/mpu9150.c#L117


			"Print status of the MPU 9150/9250",
			0,
			terminal_status);


	terminal_register_command_callback(
			"mpu_read_reg",
			"Read register of the MPU 9150/9250",
			"[reg]",
			terminal_read_reg);


	uint8_t res = read_single_reg(MPU9150_WHO_AM_I);
	if (res == 0x68 || res == 0x69 || res == 0x71 || res == 0x73) {
		mpu_found = true;
		if (!mpu_tp) {
			should_stop = false;
			chThdCreateStatic(work_area, work_area_size, NORMALPRIO, mpu_thread, NULL);
		}
	} else {
		mpu_found = false;
	}
}

this is the reason why the 6050 wont work as 9x50. Before using it the type of MPU is checked. so you wont be able to use an 9x50 MPU as 6050 MPU cause they have different identifier. But I don’t know how to solve it, it is definitely possible but you might need a custom firmware. Just search the forums and see how the others did it.

DavidBanner · May 9, 2020, 7:24pm

he uploaded the 4.12 firmware and bricked the VESC6 hardware. It sucks but hopefully someone else will read this and not make the same mistake

QwerkWerx · May 9, 2020, 7:51pm

If I were to get a trampa VESC, would that suit my needs a bit better? Has anyone used the MK IV for their onewheel?

Ctweber01 · May 10, 2020, 1:19am

Hi Remie,

I’ve started 3D modeling my one wheel and then stumbled on this post. Would you mind sharing your model with me?

Thanks,

Chris

NuRxG · May 12, 2020, 1:38am

External MPU6050 will work fine under the 9x50 setting, just gotta make sure that the “App to use” Is not set to an app that uses the rx/tx pads such as UART.

Also the info posted on footpads is out of date, they now function as ADC and require pulldown resistors, there is a more detailed post… elsewhere.

Sorry for being late with the info, i don’t really check this forum anymore. To be fair, i didn’t start this thread or ever commit to helping anyone, but I do want everyone to have a painless setup process.

Best way to get help real time is to join the telegram chat https://t.me/joinchat/JP0KNxbguWM5KhHrT5_CYA

I’m also going to film a much more comprehensive set of video guides that will make their way to the vesc project website eventually.

QwerkWerx · May 12, 2020, 12:47pm

I just bought a MK-IV. It was a bit expensive for me but I have to get the senior project done.

whittyman98 · June 5, 2020, 2:08am

Here’s my build for anyone interested!

zypher · July 11, 2020, 12:49pm

Hi Akash, I realise this is and old thread but I’ll try my luck nevertheless: Did you or are you planning to post your CAD- or STL-files somwhere? I’m currently working on a similar build and I’m trying to slim down my 3D-printed parts, unfortunately my CAD-skills are not worth mentioning. So any inspiration would be appreciated. Thanks, Marc

thi4g0tk · August 4, 2020, 12:44am

Is there a FOCer in the market that can handle 100A? I’m staring my build and was worried about performance. If I can get a FOCer that can handle more than 60A, I will build a bigger battery pack… hehe

Fosterqc · August 4, 2020, 1:20am

yeah I’m running two of them at the moment. Torqueboards TB6, You should use higher voltages for better safety though.