NEMA 17 motors not working

I have 5 NEMA 17 motors of which only 2 work (X and Extruder)

I have tried plugging the motors (Y motor and both Z motors) into the X position on the RAMPS 1.4 board. However I cannot get any motion out of the Z motors however the Y motor will twitch once the power is given to the Ramps board but then nothing else (it only twitches once briefly then nothing).

I have used this testing code:

#define X_STEP_PIN         54
#define X_DIR_PIN          55
#define X_ENABLE_PIN       38
#define X_MIN_PIN           3
#define X_MAX_PIN           2

#define Y_STEP_PIN         60
#define Y_DIR_PIN          61
#define Y_ENABLE_PIN       56
#define Y_MIN_PIN          14
#define Y_MAX_PIN          15

#define Z_STEP_PIN         46
#define Z_DIR_PIN          48
#define Z_ENABLE_PIN       62
#define Z_MIN_PIN          18
#define Z_MAX_PIN          19

#define E_STEP_PIN         26
#define E_DIR_PIN          28
#define E_ENABLE_PIN       24

#define Q_STEP_PIN         36
#define Q_DIR_PIN          34
#define Q_ENABLE_PIN       30

#define SDPOWER            -1
#define SDSS               53
#define LED_PIN            13

#define FAN_PIN            9

#define PS_ON_PIN          12
#define KILL_PIN           -1

#define HEATER_0_PIN       10
#define HEATER_1_PIN       8
#define TEMP_0_PIN          13   // ANALOG NUMBERING
#define TEMP_1_PIN          14   // ANALOG NUMBERING

void setup() {
  pinMode(FAN_PIN , OUTPUT);
  pinMode(HEATER_0_PIN , OUTPUT);
  pinMode(HEATER_1_PIN , OUTPUT);
  pinMode(LED_PIN  , OUTPUT);
  
  pinMode(X_STEP_PIN  , OUTPUT);
  pinMode(X_DIR_PIN    , OUTPUT);
  pinMode(X_ENABLE_PIN    , OUTPUT);
  
  pinMode(Y_STEP_PIN  , OUTPUT);
  pinMode(Y_DIR_PIN    , OUTPUT);
  pinMode(Y_ENABLE_PIN    , OUTPUT);
  
  pinMode(Z_STEP_PIN  , OUTPUT);
  pinMode(Z_DIR_PIN    , OUTPUT);
  pinMode(Z_ENABLE_PIN    , OUTPUT);
  
  pinMode(E_STEP_PIN  , OUTPUT);
  pinMode(E_DIR_PIN    , OUTPUT);
  pinMode(E_ENABLE_PIN    , OUTPUT);
  
  pinMode(Q_STEP_PIN  , OUTPUT);
  pinMode(Q_DIR_PIN    , OUTPUT);
  pinMode(Q_ENABLE_PIN    , OUTPUT);
  
   digitalWrite(X_ENABLE_PIN    , LOW);
    digitalWrite(Y_ENABLE_PIN    , LOW);
    digitalWrite(Z_ENABLE_PIN    , LOW);
    digitalWrite(E_ENABLE_PIN    , LOW);
    digitalWrite(Q_ENABLE_PIN    , LOW);
}





void loop () {
  
  if (millis() %1000 <500) 
    digitalWrite(LED_PIN, HIGH);
  else
   digitalWrite(LED_PIN, LOW);
  
  if (millis() %1000 <300) {
    digitalWrite(HEATER_0_PIN, HIGH);
    digitalWrite(HEATER_1_PIN, LOW);
    digitalWrite(FAN_PIN, LOW);
  } else if (millis() %1000 <600) {
    digitalWrite(HEATER_0_PIN, LOW);
    digitalWrite(HEATER_1_PIN, HIGH);
    digitalWrite(FAN_PIN, LOW);
  } else  {
    digitalWrite(HEATER_0_PIN, LOW);
    digitalWrite(HEATER_1_PIN, LOW);
    digitalWrite(FAN_PIN, HIGH);
  }
  
  if (millis() %10000 <5000) {
    digitalWrite(X_DIR_PIN    , HIGH);
    digitalWrite(Y_DIR_PIN    , HIGH);
    digitalWrite(Z_DIR_PIN    , HIGH);
    digitalWrite(E_DIR_PIN    , HIGH);
    digitalWrite(Q_DIR_PIN    , HIGH);
  }
  else {
    digitalWrite(X_DIR_PIN    , LOW);
    digitalWrite(Y_DIR_PIN    , LOW);
    digitalWrite(Z_DIR_PIN    , LOW);
    digitalWrite(E_DIR_PIN    , LOW);
    digitalWrite(Q_DIR_PIN    , LOW);
  }
  
  
    digitalWrite(X_STEP_PIN    , HIGH);
    digitalWrite(Y_STEP_PIN    , HIGH);
    digitalWrite(Z_STEP_PIN    , HIGH);
    digitalWrite(E_STEP_PIN    , HIGH);
    digitalWrite(Q_STEP_PIN    , HIGH); 
  delay(1);
    
    digitalWrite(X_STEP_PIN    , LOW);
    digitalWrite(Y_STEP_PIN    , LOW);
    digitalWrite(Z_STEP_PIN    , LOW);
    digitalWrite(E_STEP_PIN    , LOW);
    digitalWrite(Q_STEP_PIN    , LOW); 
  
}

To test the motors.

Nathan

I think one can assume that these pinouts are very well tested. I'd connect the other axes to the X axis to find out wether these motors work at all. Especially cheapo "Pololus" are known to often not work even when new.

---

Generation 7 Electronics	Teacup Firmware	RepRap DIY

Hi there,

I attached the X motor to the other axis slots and the X motor works in all positions (Y and Z) So the pololus are not the issue.. I have tried switching one of the coils on the offending motors as well.. But no different.. I can get them to twitch once.. but then they do nothing until the board is rebooted. Surely this means that the motors should be ok?

Have anyone come across this before?

Nathan