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  • PDM - Failure

    We had our first league meet last night with 14 teams. Three teams lost there PDM at the meet. Another team in the league lost their PDM last week.

    Failure appeared to occur with power-on. 2 of the 3 lights on the PDM work after this happens, which indicated a problem.
    FTC Team 5466 Combustible Lemons
    Building Lemon Squeezing Robots since 2011

  • #2
    Originally posted by FTC5466 View Post
    We had our first league meet last night with 14 teams. Three teams lost there PDM at the meet. Another team in the league lost their PDM last week.

    Failure appeared to occur with power-on. 2 of the 3 lights on the PDM work after this happens, which indicated a problem.
    Do you happen to know what happened internally to them? Blown regulators? Other damage?
    FTC6460 mentor (software+computer vision+electronics), FPGA enthusiast. In favor of allowing custom electronics on FTC bots.
    Co-founder of ##ftc live chat for FTC programming--currently you may need to join and wait some time for help--volunteer basis only.

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    • #3
      Originally posted by FTC5466 View Post
      We had our first league meet last night with 14 teams. Three teams lost there PDM at the meet. Another team in the league lost their PDM last week.

      Failure appeared to occur with power-on. 2 of the 3 lights on the PDM work after this happens, which indicated a problem.
      I'm curious about how the system worked as far as finding all of the motor controllers - were any teams forced to forfeit a match because they couldn't get connected to all of the usb devices?

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      • #4
        We keep blowing the fuse on our PDM and are not sure why. The fuse blows about 10s after powering on, not even running the robot. Two motor controllers, 4 Nevrest motors and nothing else. Going to get some more fuses tonight and try again.

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        • #5
          Internal damage. Chip Labeled U1, pin 7 (Power) was burned. Didn't notice any other damage.
          FTC Team 5466 Combustible Lemons
          Building Lemon Squeezing Robots since 2011

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          • #6
            Originally posted by btipton View Post
            I'm curious about how the system worked as far as finding all of the motor controllers - were any teams forced to forfeit a match because they couldn't get connected to all of the usb devices?
            Internal damage. Chip Labeled U1, pin 7 (Power) was burned. Didn't notice any other damage.
            FTC Team 5466 Combustible Lemons
            Building Lemon Squeezing Robots since 2011

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            • #7
              Originally posted by FTC5466 View Post
              Internal damage. Chip Labeled U1, pin 7 (Power) was burned. Didn't notice any other damage.
              That is a fairly common complaint. If it is damaged like that it certainly must have dumped a lot of current somewhere.
              FTC6460 mentor (software+computer vision+electronics), FPGA enthusiast. In favor of allowing custom electronics on FTC bots.
              Co-founder of ##ftc live chat for FTC programming--currently you may need to join and wait some time for help--volunteer basis only.

              Comment

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