We had a somewhat scary incident with our robot yesterday.
Here's what we did:
- Downloaded v14 firmware to the RC.
- Drove the robot around for a while and experienced a few intermittent radio cutouts.
- Disabled the robot at the OI via a "kill-switch"
- Noticed that the Speed Controller LEDs were still solid orange (i.e. enabled)
- Powered off the robot and changed the battery (we were about to do this anyway).
- Powered on the robot and again noticed that the Speed Controller LEDs were solid orange.
- After about 4 seconds (with 3 people standing around the robot) it took off at about full-speed without user input
- The robot ran over one of my student's foot before I could get ahold of it and lift it off of it's wheels.
For the record:
- The RC radio was mounted high on the robot and perdendicular to the ground
- The OI radio was mounted high on a wall about 15 feet away from the robot, also perpendicular to the floor.
- The kill-switch on the OI was in the disabled position from step 3 above and was NEVER moved back to enabled.
- The "disable" LED on the OI was solid orange and the RC mode LED was yellow/orange.
- The kill-switch has worked for many weeks now, disabling/enabling without issue.
Has anyone else seen anything like this?
BTW, the student is fine.