Activity Bot Calibration

HoganPope

Tried Calibrating for Activity Bot, the right servo is messed up (image below of data values) It spins non-stop whenever I'm trying to run it, any help would be appreciated.

https://dynamitemn.quintessencerealms.com/PxupQC2P.png

Thanks

Courtney Jacobs

Hello HoganPope, welcome to the Parallax forums.

Long sequences of identical numbers could be the result of the encoder cables being swapped. Please double check that your Left encoder cable is plugged into P14 and your Right encoder cable is plugged into P15. If you haven't already, please run the Test Encoder Connections program to verify that they're plugged in correctly and are working as they should.

Please also check that your P14/P15 resistors are in place and the correct value (they should be 20k red-black-orange).

If possible, posting a picture or two of your ActivityBot's connections may also help in diagnosing the issue. If you'd like to speak with a Parallax tech agent directly you can call or email our Technical Support at 888-997-8267/support@parallax.com.

Miguel Rodriguez

From the table my first thought is to check that your encoder connections are not swapped. Can you post pictures of you set up? Specifically ones the show the servo header, all 4 connections and the battery compartment. This will help us get a better sense of your set up.Meanwhile here are some other areas to check.

1) Make sure your 20k resistors are on pin 14 and 15 and jumped to 3.3V. Make sure they are seated all the way down.

2) Check that the jumper next to servo header 12 is set to Vin and the other 2 jumpers are set to 5V.

3) Here's a troubleshooting guide that may help. See link. http://learn.parallax.com/tutorials/robot/activitybot/activitybot/extras/troubleshooting

Best Regards,
Miguel Rodriguez
Parallax Inc. Tech Support

HoganPope

It turns out the error was in a broken servo

erco

Congrats on the fastest diagnosis in history!

Was the servo nulled properly? Adjusted to stop for 1.5 ms pulses?

Chris Savage

erco beat me to it. I wondered if the servo adjustment was so far off that it wouldn't center. It may just need to be adjusted and we have a program that can help you with that.

erco

You've got to get up pretty early in the morning to get the drop on Chris!

That's the usual suggestion to resolve this issue, so I figured it's worth mentioning. I still have an Activity Bot awaiting assembly. All work and no play makes erco a dull boy.