Sunday, 14 June 2015
Thursday, 26 February 2015
The bike I chose was the Kudos Tourer with Nexus 8-speed Hub. It's quite an interesting setup, and not very well documented, so I thought it was worth a few notes.
The battery pack slides on to a shelf on the rear pannier. It is a 36V nominal 10Ah pack, which charges up to 42 V open circuit. It has a key switch and the battery management and balancing must be internal. There is a four pin socket on the back, of which two pins are connected, and an RCA phono jack under the handle for charging. The charger is from Sans and its rated output is 42V 2A. My first battery wouldn't charge and my second had an intermittent cutout. Hopefully my third will be reliable!
The battery power comes into a hollow plastic box stuffed with wiring. Tidy it isn't!
Saturday, 6 December 2014
Given two bys, due to competitors failing to present themselves, we entered straight in to round 3 against another Dagu Rover 5. Flashy Rover was built and run by one of our suppliers, Dawn Robotics. Evenly matched for some time, we managed to get under them and once in their back, it was game over.
Round 4 beckons.
Three point turn was interesting. Our practice run was a farce as the robot jiggled on the spot and then stopped. It turns out, upping the main control rate meant it was checking the distance remaining from the last command before the Arduino had processed it. This meant it always saw zero and ran all the motor commands in quick succession. A quick code tweak later and we were back in business. I thought our proper run was pretty poor, but the judge was happy and declared we were third so far that day!
Straight line speed test was a good as we could manage as our robot is quite slow.
The obstacle course, again, was about as good as we could do. No penalties and all obstacles cleared in 45 seconds would have been good in the morning, but a recent run at 25 seconds had set the bar very high.
Now we wait for the sumo, with a fresh set of cells in hand. Fingers crossed!