Tb6600+stm32f407 test

connection

Adopt common cathode wiring ：

1. ENA-、DIR-、PUL- Pick up STM32F407 Development board GND End
2. ENA+ Pick up F407 Of PE0, In the air / Ground start （ When there is PWM When you rotate , When none PWM Time lock ）, Pick up 5V/3.3V stop it （ The motor is in free state , You can rotate at will ）
3. DIR+ Pick up F407 Of PE1, Control the rotation direction of the motor , And A+A-B+B- In combination with
4. PUL+ Pick up F407 Of PE5, Output PWM wave form , The general duty cycle is 50%
5. A+A-/B+B- Connect the pin of stepping motor , There is no difference between positive and negative , Positive and negative connection will only affect the direction of rotation , coordination DIR Control the direction together
6. Motor power end ： Pick up 24V, Pay attention to the positive pole . here GND There is no common ground with the control end , Maybe a common ground has been made inside the circuit board , There is no need to share the ground when wiring

To subdivide 、 Current setting

As shown in the figure , The two indicators are power indicator and PWM Indicator light .PWM The indicator light will flash continuously in the working state , instructions PWM Whether the signal is normal .ENA When the high level stops ,PWM The status of the indicator light is random , It may be positive 、 It could be negative .

Dial switch 1–3 Control motor subdivision ,ON representative 0,OFF representative 1. among 000 Invalid , amount to ENA High level stop , The stepping motor can rotate freely .001–111 As different subdivisions , This is used here 001, No subdivision .
Dial switch 4–6 Control the motor current , Use here 42 The rated current of stepping motor is 0.6A,000 identification 0.5A

Power Supply 、 Stepping motor waveform

Power end signal ： As long as give TB6600 Access to electricity , Whether there is a control signal or not （ENA、DIR、PWM）、 Subdivision status （000–111）, The signals at the power end are all one 20ms（50Hz） Waveform of . Regardless of the enabling end ENA Level state （ That is, whether the motor is locked or not ）, The power supply terminal is similar to this waveform

When enabling end ENA When the high level is invalid , Stepper motor A+A-,B+B- The end signal is the same as the power end signal

When enabling end ENA Is valid （ nothing PWM Input ）, Stepper motor A+A-,B+B- The terminal signal is ： Power end signal +PWM（ Fix ） superposition
When enabling end ENA Is valid （ nothing PWM Input ）, When the stepping motor is locked , After subdividing the output PWM The signal is fixed .

When enabling end ENA Is valid （ Yes PWM Input ）, After subdividing the output PWM The signal is constantly changing . The motor is in rotation

Problems occurred during debugging

The faults given by the manufacturer are summarized in the following figure

The problem I have ：
The motor does not turn , And there is no holding torque . It is found that the power indicator is only at the moment of power on 、 It lights up immediately after power failure , Then it doesn't light up .

Troubleshoot problems ：

1. ENA Enable signal grounding , There is still no holding torque
2. Motor rated current 0.5A, The minimum current has been modulated
3. Check the motor wire sequence ： Motor found 4 The resistance of both wires is ＜10Ω, The motor burned , Has been short circuited . Maybe I didn't pay attention to the driving current at first , The starting current is too large , Burn the motor , The back doesn't move no matter how it is adjusted . Everything is normal after replacing the motor .