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Type: Posts; User: CitizenOfDreams

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  1. Replies

    Re: No +5V to outputs?

    Your board, like most of them, has open collector outputs. To read 5V, you need a pull-up resistor between the output and the +5 bus.
  2. Re: Stripped the column cap head screws on g0704

    Doesn't have to be a screwdriver per se, could be just a large tool with enough torque.
  3. Re: Stripped the column cap head screws on g0704

    If you have enough room to work, the easiest way would be cutting a screwdriver slot in the bolt cap with a small angle grinder.
  4. Replies

    Re: Cambam limitations.

    Only you can answer that question. It depends on the kind of work you do, what are your expectations, and what style of software you are accustomed to.

    To me, CamBam is the best program for...
  5. Replies

    Poll: Re: How fast is your homemade CNC?

    Hey, it's better to have it and not need it than the other way around. :-)
  6. Re: good quality 20 degree engraving bits

    Here is what works for me with Chinese V-cutters.

    - I use 30-degree and 45-degree tools. 15-degree cutters are way too fragile, and they do not give you any advantage in cut width.
    - I use 10 000...
  7. Re: good quality 20 degree engraving bits

    I have used PreciseBits trace isolation cutters in the past, and they definitely work well. But:

    If your current setup is breaking the tips off $1 Chinese cutters, then your $15 PreciseBits cutter...
  8. Replies

    Re: Driver On/Off

    Probably the best way would be to use the ENABLE signal if your stepper driver has it (most of them do).
  9. Re: NPN Proximity Switch Extension Cable

    No, they should not. Most proximity switches - not just Chinese ones, but brand names like Telemecanique/Schneider - have unshielded cables. Using 24V logic gives you enough noise immunity without...
  10. Replies

    Re: CNC for dummies

    I would say, simply browsing this forum should give you enough information to get started. Find out what kind of machines and software other people use to make similar parts. Then figure out what...
  11. Re: NPN Proximity Switch Extension Cable

    Solution #1: extend the cable in the middle so the end will have the original colors.

    Solution #2: buy different switches with longer cables (probably would be cheaper than buying cable from...
  12. Replies

    Re: $200 Spindle Motor?

    I don't think there are "blink codes" in this controller, it just flashes continuously when the motor is at zero speed. Do you have the potentiometer wired?
  13. Re: 6 axis control board smoked out a transistor , would need help to understand the

    The "transistor" you are talking about is most likely not a transistor but a 78xx voltage regulator. Can you see any markings on it?

    Since it's a linear regulator, it WILL get hot. The higher is...
  14. Replies

    Re: placement of VFD

    A month ago I ran into a serious problem when I mounted a VFD on a moving carriage of a LARGE woodworking machine (takes a whole tree log and makes it perfectly round). The VFD failed in just a...
  15. Replies

    Re: CamBam help for Slot

    Just draw a C-shaped line and make a profile operation from it.

    Draw a 0.5" circle, add two straight lines, then CTRL-A (select all), CTRL-B (break at intersections), delete one half of the...
  16. Re: Home switches - how useful, what is your set-up

    Home switches are used for two things.
    1) Setting soft limits, and
    2) Setting the worktable origin.

    For #1, the switch does not need to be particularly accurate. Pretty much any kind of switch...
  17. Re: Optimum current setting for stepper motor

    You can safely try 3.3A for a few minutes, just keep an eye on the motor temperature. If the motor gets too hot, reduce the current.
  18. Replies

    Re: Which bits to use for PCB milling?

    Whoa... Would that be Oklahoma?
  19. Re: Home and Limit Switch Recommendations

    Still, I personally don't like relying on a switch for long-term repeatability. Mechanical switches wear over time; proximity sensors may change sensitivity with voltage, temperature etc. The...
  20. Re: 'Air Pressure Low' - Interact 308 TNC2500B

    OK. So the PLC turns on the unclamp solenoid, then waits for the unclamp microswitch to activate. If the microswitch signal is not received in time, the PLC assumes that the air pressure is too low...
  21. Re: 'Air Pressure Low' - Interact 308 TNC2500B

    You could try manually triggering the pressure switch and see which PLC input changes value. Then check if that input also toggles during tool change.
  22. Re: 'Air Pressure Low' - Interact 308 TNC2500B

    I am not familiar with your controller, does it allow monitoring input/output signals in real time? If so, I would watch the pressure switch input status while the clamp is open. Something could be...
  23. Re: High power wire splice and extension

    Pomona makes test lead wires rated at 10kV and more; this is what I used in the past for similar applications.

    Here is how I spliced it:
    - make a smooth solder joint with no sharp edges;
    - smear...
  24. Re: HSD ES951 spindle losing pressure during tool change

    I have not seen a machine that would close and reopen the clamp during the tool change. And as long as the clamp is open, the air keeps blowing through the spindle to clean the cone. That's perfectly...
  25. Re: 'Air Pressure Low' - Interact 308 TNC2500B

    "All okay" meaning the problem was gone when you did that? Then either the switch is intermittent, or the pressure indeed drops below 40psi at the point where the switch is mounted.
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