General discussion

For a project, we need to drive a brushless motor at very low speed. yet with some torque at very low speed (almost like with break on)

The ideal thing would be that VESC always generate a sine waves but at frequencies of 50Hz down to almost 0. Were it would be similar to brake...

I have realized that at very low speed, the motor is turned OFF. The signal also does not look like sine wave.

What settings would you recommend ?

Thanks

After using way too much time figuring out how the VESC can status messages function, I decided to share it :)

Found it in the can.c code https://github.com/vedderb/bldc/blob/master/comm_can.

As I am using one of my VESCs to control a motor that turns (jaw) an outboard boat motor with a 100:1 gear ratio it would be extremely useful to read the tachometer counts.

When running the real time data analysis you can see that the tachometer reads every pulse from the encoder

In my chase its 3 hall sensors, so one rotation of my rotor would make the tachometer value change by +/- 12

How can I pull this data? 

It is not seen in the 1_2_3_4 status updates that is broadcasted.

Hi, I've started using ADC Current No Reverse Brake Button which fills my needs pretty well in terms of throttle ergonomics. But because the Brake button is using GND and RX pins, I suppose I cannot use UART anymore to connect a Bluetooth module. 

-Is it possible to use a mobile vesc monitoring app through USB (with USB On-the-go adapters) instead of Bluetooth ?

-Is it possible to modify the firmware and put that Brake Button on the unused ADC2 pin instead of RX, and free RX for UART purposes.

Hello all, im new here, fantastic place, wish i had this 13 years ago when i was building electric SK8 Boards.

any hoo, to the point.

First, I would like to use the Use the integrated Motor hall sensors as the encoder for my application.

I need position control, but not really fine control. I just want to count the times the hall is triggered. and calculate distance.

so basically I want to send the hall pulses out the UART or CAN bus. can some one point me to the correct place if this has been discussed before?

My Velineon 3500 motor works fine with the VESC when setting the duty cycle. However, whenever I set a RPM the motor goes crazy. For- and backwards randomly. I'm using MIT Racecar configs files for the motor. Those were used before with exactly this motor. 

What could be the reason for this behaviour? I thought maybe the number of poles in the additional info register is wrong, but this had no effect. 

Dear all,

i want to use a 100k NTC on my custom PCB, just because it is on stock here.

I change the second resistor to 100k too and modified the defines to the new Values and B Value

// NTC Termistors
#define NTC_RES(adc_val)                ((4095.0 * 100000.0) / adc_val - 100000.0)
#define NTC_TEMP(adc_ind)               (1.0 / ((logf(NTC_RES(ADC_Value[adc_ind]) / 100000.0) / 4380.0) + (1.0 / 298.15)) - 273.15)

is this correct ? at 20° C it looks good, but i don't trust other values at the moment

Regards

Georg

I have ordered this VESC controller https://diyelectricskateboard.com/collections/featured-items/products/to... my Velinon 3500 motor could not be controlled at lower speed. I loaded this configuration on it: https://github.com/mit-racecar/hardware/blob/master/vesc/6.141_bldc_old_...

Hi 

I have problems get the VESC motor controller to drive the TP100 inrunner motor:

http://www.tppower.com/sort.asp?class_id=4&news=110

TP100

Hi there,

So in my application there is a lot of frequent and sudden direction changes. I use VESC 6.

Sometimes VESC gets stuck in one direction for some period of time, before changing direction (once direction change command arrives, it takes few seconds for VESC to follow). Also, red LED flashes 3 times often times (I suppose, over current?), but VESC keeps working.

I wonder if there are any settings I can tweak to make VESC work more reliably?

Thanks!

Jeff