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  1. RobiD

    3-Axis Stepper Controller

    I was informed that a computer power supply is switching and not as good as an unregulated supply. How do I check current supply? I was using an AT power supply, and I was only getting about 10vdc with load. Also, I have another AT power supply that has very low volts with no load (about...
  2. RobiD

    3-Axis Stepper Controller

    Sorry, another question. I may try to build a power supply myself. What sort of amperage do I require to run the driver and motors, or is related to the ratings of the stepper motors only which is 216mA at 24vdc per motor. (data sheet here if needed...
  3. RobiD

    3-Axis Stepper Controller

    Thank you MP for your response, in fact thank you everyone who has has an input. As for a wiring diagram for 5 wire steppers, it was more trial and error after identifying the center tap using a multimeter, connecting this to position two of the individual axis connectors, then connecting the...
  4. RobiD

    3-Axis Stepper Controller

    In addition to the above: I have changed around the order of the wires and am now getting rotation. It's ok on the z and y axis, but the x axis is a little choppy. There is also not a lot of torque (not enough to move the axis, but the steppers rotate in-situ without the axis attached (hope...
  5. RobiD

    3-Axis Stepper Controller

    Ok, I've built the board, the cnc and I'm using Kcam. I have configured the pins on the LPT port. When I jog the different axis, I get movement at the correct motor, but, the motor won't turn in either direction. While I am jogging the axis, I can move the motor either way with a little...
  6. RobiD

    3-Axis Stepper Controller

    MP, Thank you for your detailed response. I will be using old equipment so I won't consider it a priority to isolate. Thanks again, this is a great project, and I am enjoying building the cnc machine and the electronics. David
  7. RobiD

    3-Axis Stepper Controller

    Thank you. I was worried this forum wasn't monitored anymore. David :)
  8. RobiD

    3-Axis Stepper Controller

    I hope people still read this forum, haven't had an answer to the above question yet. Anyway, here's another one regarding limit switches. Attached is an altered version of a diagram that was posted earlier, what I need to know is, with three limit switches for x,y and z are they wired in...
  9. RobiD

    3-Axis Stepper Controller

    Hi, First time posting here, but I have a quick question. I have made the pcb and I am just about to populate it. Someone suggested to me that I should use opto-isolators to protect the motherboard from power spikes. Is this necessary? Has anyone else had this happen? Has anyone redesigned...
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