Recent content by Susquatch

  1. Susquatch

    Bridgeport Mill Tachometer

    Does your shaper get driven by an eccentric of some kind to move the ram? If so, you could do the math to translate motor speed into ram speed. It will be mostly sinusoidal. But it should be easy to write a formula for cutting tip speed based on motor speed. Motor speed is more constant and...
  2. Susquatch

    Bridgeport Mill Tachometer

    So, as you have alluded, the problem with close sensors is resolution. Resolution error arises from many sources - errors in the spacing, errors in the trigger edge from one sensor to the next, the difference between one count and the next, the impact of the clock input, and of course the speed...
  3. Susquatch

    Bridgeport Mill Tachometer

    Looks good! The trick with most soldering is to apply enough heat to melt the solder and fuse it to the part without melting everything else around it (plastic, wire insulation, etc). There are many ways to skin a cat but I find that a smaller iron works better for electronics. 20Watts is more...
  4. Susquatch

    Bridgeport Mill Tachometer

    I think if you really need one thou direct precision, you are probably stuck with scales of some kind. However, I'd be tempted to take a real good look at the table actuating mechanism. Maybe some other kind of scale could be used there instead. In fact, if there is any leverage (gearing, timing...
  5. Susquatch

    Bridgeport Mill Tachometer

    I realize scales are not cheap, but what about two dro scales and read em with the Arduino instead of a DRO monitor? The Arduino can calculate velocity from displacement. Just suggestions - I am not familiar with what your shaper looks like. If scale level precision is not required, maybe an...
  6. Susquatch

    Bridgeport Mill Tachometer

    That wasn't my first soldering adventure, but I had one of those too! Can you imagine? And @YYCHM actually thinks this endeavour of his will be finished some day.... The adventure is just beginning!
  7. Susquatch

    Bridgeport Mill Tachometer

    This is good to hear. I was worried about you......;)
  8. Susquatch

    Bridgeport Mill Tachometer

    I like the variety of lengths in this set, but I also like the variety of connections in the set that @whydontu linked to on Amazon. Someplace in my electronics shop I have a shoebox of wires (all male both ends) that I used to use for breadboarding. I think all my breadboards are gone though -...
  9. Susquatch

    Bridgeport Mill Tachometer

    Hey @YYCHM & @whydontu I'm not vouching for this outfit but thought it was interesting. Visuino is a drag and drop visual programming environment for various microcontrollers including Arduino. There is a free limited version. Full versions require a license. I can't seem to get past the...
  10. Susquatch

    Rotary table indexer

    All very cool @Johnwa. I really need to think about getting a 3d printer........
  11. Susquatch

    Rotary Table Questions

    I looked at your project briefly and made a comment there about your battery. The project is very cool! I'll review it in more detail shortly. One thing I have noticed in my short time on this forum. All you guys seem to spend more time making tools for your tools than making parts. I always...
  12. Susquatch

    Rotary table indexer

    I'll find my way through your post in due time. I do like the idea of an electronic indexer. In the mean time, I noticed that you used a Makita 18v Tool battery. My big 8" Meade LX200 telescope is also 18V, so I did the same thing. But I didn't make a 3d printed connector. I just bought their...
  13. Susquatch

    Bridgeport Mill Tachometer

    Generally, they are called PCB connectors (short for printed circuit board). But they go by other names depending on the pin size and spacing. The two, three, and 4 way connectors we discussed earlier have 1/10th inch spacing and are called terminal blocks because they take a wire on the other...
  14. Susquatch

    Rotary Table Questions

    Typical German Engineer....... I recognize his type in the mirror too......
  15. Susquatch

    Rotary Table Questions

    Just a few additional observations. My universal dividing head is 9 degrees per revolution of the crank handle. 1 in 40 as per your note. My RT is 4 degrees per revolution. 1 in 90 as per your note. My collet indexer is direct only and is setup to do only whole degrees. I'm still...