求教：用298N控制步進電機停止后回轉不穩定
我在嘗試用arduino控制步進電機做自動控制，遇到以下問題請高手指教一下：思路：電機向前運動到限位A處回轉，再向后運轉到限位B處停止。限位A處沒有物品時電機再向前運動。如此循環。
可我發現電機停止后不是統一向前動，而有時向前有時向后。是編程的哪里出錯？或是有別的方法嗎？（如用4988控制板等）
另有一個問題，電機與298N控制板發熱嚴重。還在上網查學中。
程式如下：
int Pin0 = 8;
int Pin1 = 9;
int Pin2 = 10;
int Pin3 = 11;
int _step =0 ;
boolean dir; //= -1;正反转
int stepperSpeed = 20;//电机转速,1ms一步
void setup()
{
pinMode(Pin0, OUTPUT);//PIN8
pinMode(Pin1, OUTPUT);//PIN9
pinMode(Pin2, OUTPUT);//PIN10
pinMode(Pin3, OUTPUT);//PIN11
pinMode(4,INPUT);
pinMode(5,INPUT);
pinMode(6, OUTPUT);
pinMode(7, OUTPUT);
}
void loop()
{
if(digitalRead(4)) //到達前方限位時，電機反轉
{
up();
}
else{
down();
}
if(digitalRead(5)) //到達后方限位時，電機停止
{ digitalWrite(6, HIGH);
digitalWrite(7, HIGH);
}
else{
digitalWrite(6, LOW);
digitalWrite(7, LOW);
}
}
void down()
{
switch(_step){
case 0:
//stepperSpeed++;
digitalWrite(Pin0, LOW);
digitalWrite(Pin1, LOW);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, HIGH);//32A
break;
case 1:
digitalWrite(Pin0, LOW);
digitalWrite(Pin1, HIGH);//10B
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, HIGH);
break;
case 2:
digitalWrite(Pin0, LOW);
digitalWrite(Pin1, HIGH);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, LOW);
break;
case 3:
digitalWrite(Pin0, LOW);
digitalWrite(Pin1, HIGH);
digitalWrite(Pin2, HIGH);
digitalWrite(Pin3, LOW);
break;
case 4:
digitalWrite(Pin0, LOW);
digitalWrite(Pin1, LOW);
digitalWrite(Pin2, HIGH);
digitalWrite(Pin3, LOW);
break;
case 5:
digitalWrite(Pin0, HIGH);
digitalWrite(Pin1, LOW);
digitalWrite(Pin2, HIGH);
digitalWrite(Pin3, LOW);
break;
case 6:
digitalWrite(Pin0, HIGH);
digitalWrite(Pin1, LOW);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, LOW);
break;
case 7:
digitalWrite(Pin0, HIGH);
digitalWrite(Pin1, LOW);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, HIGH);
break;
default:
digitalWrite(Pin0, LOW);
digitalWrite(Pin1, LOW);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, LOW);
break;
}
_step++;
if(_step>7){ _step=0;}
delay(stepperSpeed);
}
void up()
{
switch(_step){
case 0:
//stepperSpeed++;
digitalWrite(Pin0, HIGH);
digitalWrite(Pin1, LOW);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, LOW);//32A
break;
case 1:
digitalWrite(Pin0, HIGH);
digitalWrite(Pin1, LOW);//10B
digitalWrite(Pin2, HIGH);
digitalWrite(Pin3, LOW);
break;
case 2:
digitalWrite(Pin0, LOW);
digitalWrite(Pin1, LOW);
digitalWrite(Pin2, HIGH);
digitalWrite(Pin3, LOW);
break;
case 3:
digitalWrite(Pin0, LOW);
digitalWrite(Pin1, HIGH);
digitalWrite(Pin2, HIGH);
digitalWrite(Pin3, LOW);
break;
case 4:
digitalWrite(Pin0, LOW);
digitalWrite(Pin1, HIGH);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, LOW);
break;
case 5:
digitalWrite(Pin0, LOW);
digitalWrite(Pin1, HIGH);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, HIGH);
break;
case 6:
digitalWrite(Pin0, LOW);
digitalWrite(Pin1, LOW);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, HIGH);
break;
case 7:
digitalWrite(Pin0, HIGH);
digitalWrite(Pin1, LOW);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, HIGH);
break;
default:
digitalWrite(Pin0, LOW);
digitalWrite(Pin1, LOW);
digitalWrite(Pin2, LOW);
digitalWrite(Pin3, LOW);
break;
}
_step++;
if(_step>7){ _step=0;}
delay(stepperSpeed);
} 电机发热太严重可能是你接错线了！还有，其实你可以用步进电机库来写这个程序更简便 jiangzd 发表于 2016-6-23 16:25 static/image/common/back.gif
电机发热太严重可能是你接错线了！还有，其实你可以用步进电机库来写这个程序更简便
謝謝你的關心。
這幾天又忙起來了，晚點我再試試。
我在小工廠做工程，初學arduino就想運用它實際幫作業員減少一點工作量。
主要是停止之后再啟動，方向不確定。-----我希望它只向前走，卻有時向前有時向后。好象是停止之前的脈沖周期沒完成，跟啟動后的脈沖有干涉。程式改很久也不成功
后來又改用直流電機好象也不行。
如果可以，請再費心指教一下。
謝謝！
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