# BLDC motor does not start by itself – works after manual push (Angle Control)

**URL:** https://community.simplefoc.com/t/bldc-motor-does-not-start-by-itself-works-after-manual-push-angle-control/7991
**Category:** applications
**Created:** [February 15, 2026, 8:53pm UTC](https://community.simplefoc.com/t/bldc-motor-does-not-start-by-itself-works-after-manual-push-angle-control/7991 "2026-02-15T20:53:04Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![leon1](https://community.simplefoc.com/letter_avatar_proxy/v4/letter/l/a88e57/32.png) [@leon1](https://community.simplefoc.com/u/leon1)
#### Post date: [February 15, 2026, 8:53pm UTC](https://community.simplefoc.com/t/bldc-motor-does-not-start-by-itself-works-after-manual-push-angle-control/7991/1 "2026-02-15T20:53:04Z")

</div>

Hello everyone,

I am currently using a **Nanotec DB28S01** motor in angle control mode. However, I am experiencing a very unusual behavior in my setup.

The motor does not start spinning on its own. It remains stationary even though the control is active. However, if I give the motor a slight manual push, it immediately starts spinning smoothly and continues to run perfectly without any issues.

Additionally, during the alignment process, the motor does not move at all — regardless of the alignment voltage I set.

Below is my code. I would really appreciate any suggestions or ideas on what could be causing this issue.

Thank you in advance!

> #include \<SimpleFOC.h\>
> 
> float target\_angle = 0; //= 6.28;
> 
> // Motor instance(pp)
> 
> BLDCMotor motor = BLDCMotor(2);
> 
> // driver instance
> 
> BLDCDriver3PWM driver = BLDCDriver3PWM(16, 4, 32);
> 
> HallSensor sensor = HallSensor(25, 26, 27, 2);
> 
> // Interrupt routine initialization
> 
> // channel A, B and C callbacks
> 
> void doA(){sensor.handleA();}
> 
> void doB(){sensor.handleB();}
> 
> void doC(){sensor.handleC();}
> 
> // instantiate the commander
> 
> Commander command = Commander(Serial);
> 
> void doTarget(char\* cmd) { command.scalar(&target\_angle, cmd); }
> 
> void setup() {
> 
> Serial.begin(115200);
> 
> SimpleFOCDebug::enable(&Serial);
> 
> // initialize sensor hardware
> 
> sensor.init();
> 
> // hardware interrupt enable
> 
> sensor.enableInterrupts(doA, doB, doC);
> 
> // link the motor and the sensor
> 
> motor.linkSensor(&sensor);
> 
> // driver config
> 
> // power supply voltage [V]
> 
> driver.voltage\_power\_supply = 12;
> 
> // driver init
> 
> if(!driver.init()){
> 
> ```
> Serial.println("Driver init failed!");
> 
> return;
> 
> ```
> 
> }
> 
> // link driver
> 
> motor.linkDriver(&driver);
> 
> // aligning voltage
> 
> motor.voltage\_sensor\_align = 2.2f;
> 
> // set motion control loop to be used
> 
> motor.controller = MotionControlType::angle;
> 
> // contoller configuration
> 
> // default parameters in defaults.h
> 
> // velocity PI controller parameters
> 
> motor.PID\_velocity.P = 0.2f;
> 
> motor.PID\_velocity.I = 0.20f;
> 
> motor.PID\_velocity.D = 0;
> 
> // default voltage\_power\_supply
> 
> motor.voltage\_limit = 12;
> 
> // default value is 300 volts per sec ~ 0.3V per millisecond
> 
> motor.PID\_velocity.output\_ramp = 1000;
> 
> // velocity low pass filtering time constant
> 
> motor.LPF\_velocity.Tf = 0.1f;
> 
> // angle P controller
> 
> motor.P\_angle.P = 10;
> 
> // acceleration control using output ramp
> 
> // this variable is in rad/s^2 and sets the limit of acceleration
> 
> motor.P\_angle.output\_ramp = 10000;
> 
> // maximal velocity of the position control
> 
> motor.velocity\_limit = 200;
> 
> // use monitoring with serial
> 
> Serial.begin(115200);
> 
> // comment out if not needed
> 
> motor.useMonitoring(Serial);
> 
> // initialize motor
> 
> motor.init();
> 
> // align sensor and start FOC
> 
> motor.initFOC();
> 
> // add target command T
> 
> command.add(‘T’, doTarget, “target angle”);
> 
> Serial.println(F(“Motor ready.”));
> 
> Serial.println(F(“Set the target angle using serial terminal:”));
> 
> \_delay(1000);
> 
> }
> 
> void loop() {
> 
> // main FOC algorithm function
> 
> motor.loopFOC();
> 
> // Motion control function
> 
> // You can also use motor.move() and set the motor.target in the code
> 
> motor.move(target\_angle);
> 
> // function intended to be used with serial plotter to monitor motor variables
> 
> // significantly slowing the execution down!!!
> 
> // motor.monitor();
> 
> // user communication
> 
> command.run();
> 
> }