stepper running rough what could it be ?

[dansu]

Hi guys I have a Arduino starter pack. Just using the uno to run a step motor. The motor runs ok with a delay of 1, but then I give a delay of 10 and the noise picks up and runs rough. Why ? and what options are there to fix this ? Thanks.

[adafruit_support_bill]

Which stepper motor and what power supply are you using to power it?

Please post the code you are using.

[dansu]

Stepper is SM42HT47-1684B
12V supply
Driver: A4988

Code:
void setup() {
pinMode(8, OUTPUT);
pinMode(9, OUTPUT);
digitalWrite(8, LOW);
digitalWrite(9, LOW);
}

void loop() {
digitalWrite(9, HIGH);
delay(1);
digitalWrite(9, LOW);
delay(1);
}

[adafruit_support_bill]

Both stepper and driver are not products that we carry. You should contact the seller for technical assistance.