RAMPS SHORT CIRCUIT!!

Hello all,

When I connected the steppers and their drivers. My extruder driver fried (not sure why I think there was a problem on Ultimachine RAMPS board). Then I checked all driver pins one by one and enable pins are high

although I make them low. That's why my steppers don't rotate. However when I eject RAMPS from Arduino, pin connected to X_Enable gets low (I measured 38th pin of DIGITAL pins of Arduino). My code is below. I am doubtful of short circuit at RAMPS board.

What do you prefer for this?

void setup ()  {
#define X_ENABLE_PIN       38
#define Y_ENABLE_PIN       56
#define Z_ENABLE_PIN       62
#define e0_ENABLE_PIN       24
#define e1_ENABLE_PIN       30

pinMode(X_ENABLE_PIN, OUTPUT );
pinMode(Y_ENABLE_PIN, OUTPUT );
pinMode(Z_ENABLE_PIN, OUTPUT );
pinMode(e0_ENABLE_PIN, OUTPUT );
pinMode(e1_ENABLE_PIN, OUTPUT );

}

void loop (){
  
digitalWrite(X_ENABLE_PIN,HIGH);
digitalWrite(Y_ENABLE_PIN,LOW);
digitalWrite(Z_ENABLE_PIN,LOW);
digitalWrite(e0_ENABLE_PIN,LOW);
digitalWrite(e1_ENABLE_PIN,LOW);

}

Edited 1 time(s). Last edit at 07/17/2014 09:58AM by bhoke.

Power down, remove all Pololus and measure again. Pololus can have a short, too. Especially when they were inserted the wrong way before and you powered up.

---

Generation 7 Electronics	Teacup Firmware	RepRap DIY

I measured it with just Arduino connected. I think board was defective at the beginning because I'm sure that I placed drivers right direction (screw side is opposite to power supply input).

Help please

These stepper drivers are very fragile. If you DID insert them backwards, they may be shot. Once you know you have a good driver, I'd go with 1 motor at a time. Do not even insert the other drivers. Get X working, then move on to Y, Z, and E. And when you are working with these drivers, always remove power - I remove both the power connector from ramps as well as the USB from the arduino - any time you are inserting or removing either a driver or a motor. Inserting either of these under power is a sure way to fry the driver boards.

Quote
jbernardis
These stepper drivers are very fragile. If you DID insert them backwards, they may be shot. Once you know you have a good driver, I'd go with 1 motor at a time. Do not even insert the other drivers. Get X working, then move on to Y, Z, and E. And when you are working with these drivers, always remove power - I remove both the power connector from ramps as well as the USB from the arduino - any time you are inserting or removing either a driver or a motor. Inserting either of these under power is a sure way to fry the driver boards.

But I'm sure that I connect them in right direction, and I did everything after shut down the power