HELLO EVERYBODY
i'm supposed to design a simple stepper motor drive circuit, i did a simple one but the problem is the limiting current resistor i don't know how to calculate it . therefor i don't have enough informations about the motor neither the current nor the voltage etc (motor:SANYO DENKI 103H-546-0741 impossible to find the datasheet!! 6 wires unipolar 1.8 Ω resistance 1.8°step)
today i made an experiment with a 47kΩ power resistor the motor turns with coggs at 50hz when i increase the STEP frequency it vibrates and stops and the power resistor become insanely hot i don't know why is it current (low )?
this is the schema :
http://www.imagup.com/data/1121635644.html
best regards
i'm supposed to design a simple stepper motor drive circuit, i did a simple one but the problem is the limiting current resistor i don't know how to calculate it . therefor i don't have enough informations about the motor neither the current nor the voltage etc (motor:SANYO DENKI 103H-546-0741 impossible to find the datasheet!! 6 wires unipolar 1.8 Ω resistance 1.8°step)
today i made an experiment with a 47kΩ power resistor the motor turns with coggs at 50hz when i increase the STEP frequency it vibrates and stops and the power resistor become insanely hot i don't know why is it current (low )?
this is the schema :
http://www.imagup.com/data/1121635644.html
best regards
Last edited: