[3-Axis Stepper Controller]

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

[3-Axis Stepper Controller]

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

[3-Axis Stepper Controller]

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

[3-Axis Stepper Controller]

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

[3-Axis Stepper Controller]

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!