ryanstewart86

Hi everyone, I was just wondering if it were possible to increase the output of the ucn5804b by using a low resistance pull up resistor to increase the ampage in order to run larger motors? At the moment what is the largest motor oz/in the chip can run? Thanks Ryan

Hi MP, SUCCESS!!! finally got the board working correctly, i found out that the wires from the stepper motor were round the wrong way, i am only running one stepper at the moment! Thanks for everyones help! Ryan

Thanks guys for the help but i am still having a problem, i am using the half step mode, the motor only works at a certain speed, it also has direction clockwise but counter clockwise just vibrates or jumps counter clockwise. im using 12V 1A power supply unipolar stepper motor: 200 steps per revolution Step angle 1.8

Hi guys the s/w im using is TurboCNC & JalaCNC, i also tried changing the states i.e. one phase, step inhibit, half step etc, for some reason it doesnt like it, stalls or vibrates. p.s do you know if you hav 2 change the step to phase in TurboCNC? Ryan

Hi all, dont know if people still post to this but i need help. I have built the board, tested it and connected it, when in operation the motor is either 1 of 3 things: 1: Jumpy and just vibrates 2: Has direction but very slow and not much torque 3: stationary but with strong holding torque Could someone please help Thanks Ryan p.s When i tested it, i tested for signals from the parallel port and the 5V from the power supply, both of which work!