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Tutorial SMC3 Arduino 3DOF Motor Driver and Windows Utilities

Discussion in 'SimTools compatible interfaces' started by RufusDufus, Dec 1, 2013.

Page 109 of 131
  1. tadek

    tadek Active Member

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    hi Tom1980
    can you send a picture of your potentiometer

    Best regards
    tadek, Jan 27, 2022
    #2161
  2. Tom1980

    Tom1980 The Sky Is The Limite

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    20220127_163255.jpg 20220127_163246.jpg
    This is the one I am using. I got it from digikey
    Tom1980, Jan 27, 2022
    #2162
  3. Tom1980

    Tom1980 The Sky Is The Limite

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    Thank you Tadek for responding so quickly.
    Tom1980, Jan 27, 2022
    #2163
  4. Tom1980

    Tom1980 The Sky Is The Limite

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    I am using the Elegoo mega, I wonder if it isn't compatible with this coding. What do you think?
    Tom1980, Jan 27, 2022
    #2164
  5. Tom1980

    Tom1980 The Sky Is The Limite

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    I tried that but it won't move off the bottom. No matter which was I rotate it. Interestingly though when I check the voltage from the positive leg to the Vout I get exactly 1 volt in difference which is 4.08 volts.
    Tom1980, Jan 27, 2022
    #2165
  6. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    That seems to me to indicate a wiring or hardware problem. Check the wiring to the pot, including polarity, and if you have more that one swap them over, to try and pin down where the issue is.
    noorbeast, Jan 28, 2022
    #2166
  7. Tom1980

    Tom1980 The Sky Is The Limite

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    Thank you Noorbeast, I have checked and double checked the wiring as per the diagram. I wonder if my sensor is faulty as you mentioned so I will try another one.
    Tom1980, Jan 28, 2022
    #2167
  8. Tom1980

    Tom1980 The Sky Is The Limite

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    Update: I tried the second sensor and got no change. I am using a mega until my uno arrives but I think the structure should be similar and the pins universal. Having said that I switched to several different pins and still the same. Do you think it could be the difference in boards?
    Tom1980, Jan 28, 2022
    #2168
  9. Tom1980

    Tom1980 The Sky Is The Limite

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    My Motion Simulator:
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    Screenshot_20220127-211544_Drive.jpg
    Correct me if I am wrong but doesn't the ground go to GND the positive go to +5v and the sensor connect to Vout and also be connected to A0 on the board.
    Tom1980, Jan 28, 2022
    #2169
  10. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    SMC3 is written for the Uno, so the Mega may be the issue.
    noorbeast, Jan 28, 2022
    #2170
  11. Tom1980

    Tom1980 The Sky Is The Limite

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    I have an uno on the way and I kinda hope that's it but logic would state that with the mega simply being an extended uno that the syntax would be the same.
    Tom1980, Jan 28, 2022
    #2171
  12. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
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    They are not exactly the same.
    noorbeast, Jan 28, 2022
    #2172
  13. Tom1980

    Tom1980 The Sky Is The Limite

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    That must be the reason then. Thank you for the advice. I should have one in a few days and we will see.
    • Like Like x 1
    Tom1980, Jan 28, 2022
    #2173
  14. Gadget999

    Gadget999 Well-Known Member

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    doe the vout voltage go up and down when you turn the pot ?
    Gadget999, Jan 28, 2022
    #2174
  15. Tom1980

    Tom1980 The Sky Is The Limite

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    Hello and good morning, unfortunately the Voltage remains the same at all times. The Voltage going in is 5.08 and the Vout Voltage is exactly 4.08 in every direction the switch is turned even when turned completely around 360 degrees.
    Tom1980, Jan 28, 2022
    #2175
  16. Gadget999

    Gadget999 Well-Known Member

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    remove the signal wire from the pot and test again
    Gadget999, Jan 28, 2022
    #2176
  17. Tom1980

    Tom1980 The Sky Is The Limite

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    My Motion Simulator:
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    20220128_105248.jpg
    I tried your suggestion but this is what happened. Any thoughts as to why. I am also very thankful for yours and everyone's help here.

    Attached Files:

    Tom1980, Jan 28, 2022
    #2177
  18. Gadget999

    Gadget999 Well-Known Member

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    Use a multimeter to measure the voltage on the output
    Gadget999, Jan 28, 2022
    #2178
  19. Tom1980

    Tom1980 The Sky Is The Limite

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    I have, the input voltage is 5.08 and the output voltage is 4.08. I am at a loss as to why I am losing one voltage. ON the other the voltage always stays at 4.08 no matter where I turn the Pot.
    Tom1980, Jan 28, 2022
    #2179
  20. Gadget999

    Gadget999 Well-Known Member

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    Remove the pot and benchtest it with no other wires just 5v and gnd
    Gadget999, Jan 28, 2022
    #2180
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