E VENT S
4-6 Robot Challenge
Events include Parallel Slalom, Slalom Enhanced, Mini
Sumo, and Micro Sumo.
10-20 Missouri State Fair Robot Expo
Missouri State Fair, Sedalia, MO
Events include FIRST Robotics, VEX Robotics, and 4-H
12 CIRC Central Illinois Bot Brawl
Peoria Civic Center, Peoria, IL
Events include Sumo, Line Following, Line Maze, and RC
15-23 ERL Emergency Robots
Autonomous robot compete in a simulated disaster
1-4 DragonCon Robot Battles
Events include autonomous and RC combat.
4-8 World Robotic Sailing Championship
Robot sailboats must navigate an ocean course around
Autonomous robots navigate a park carrying a five liter
barrel of beer.
17-18 Canadian National Championship
Saskatoon Comic & Entertainment Expo
SERVO 08.2017 7
Fraction of an Error
I've just spotted a couple of (minor) mistakes in my
second article on the Arduino controlled robot arm in the
July 2017 issue.
This formula: W = m – 180°
Should be: W = 180° – m
My apologies for any inconvenience!
Ricardo Caja Calleja
I'm a long-time reader of SERVO and just wanted to tell
you that I really enjoyed the two articles about the robotic
arm. For me, they were very timely because one of my next
projects is a 6 DOF robot arm. I've been a SERVO reader
since the first edition and still enjoy it a lot.
I'm also a ham operator and lately I've been enjoying a
kit radio called the BitX40. The Bitx40 is SSB QRP and I've
made contacts all over the western US and BC. It's being
sold as an experimental radio and there are lots of mods
and user groups for it. Even nicer is the price which is only
$59. Shipping is free but it definitely comes on a slow boat
from India. With my second rig, I paid the $10 shipping
charge and it arrived within a week.
Thanks again. You're doing a great job.
Steve Jackson KE7RTV
b Xw m = B + n + 90° = sin -1 • sinC + sin -1 c c ( ) ()
b Xw m = B + n + 90° = sin -1 • sinC + sin -1 + 90° c c ( ) ()