Let's examine the variable that we can adjust. (weight, radius, magnet force) Maybe a larger drive radius would help. That might mean finding a larger surgical tubing or similar. From: team2039-bounce@xxxxxxxxxxxxx [mailto:team2039-bounce@xxxxxxxxxxxxx] On Behalf Of Adam Czerwonka Sent: Tuesday, February 01, 2011 9:04 AM To: 'team2039@xxxxxxxxxxxxx' Subject: [team2039] No Robotics Meeting Tonight It is sounding like many may not be able to make the meeting tonight. As the blizzard warnings have been pushed up to 3 PM today, I think it will be best if we call off the meeting and resume the build on Thursday. By then we should likely have shaft collars and most of the rest of the electronics parts that we need. I will also go ahead and order some more minibot motors to replace the one / ones we may have burnt up last night. Thinking about the minibot motor burn from an engineering prospective, please see below. I would like everyone to research how we could potentially modify the gear boxes (if possible) to get a more favorable gear ratio without making the minibot very big. Otherwise, we do have a design that climbs, but will just require some downsizing (perhaps we can make the old design super compact?). [cid:image001.jpg@01CBC1F5.0B54DB90] This torque allows the motor to operate normally without problem. It works much better going down because the weight acts to reduce the torque required thereby making a stall less likely. The weight is also working against friction in this case. We can calculate both of the torques, and we know that we want to operate closer to the second motor torque. We should note that the weight as tested last night did not include the battery. Thanks, Adam Czerwonka Engineer Woodward - Turbine Fluid Systems & Controls Tel: 815-639-6313 Fax: 815-639-5247 Email: aczerw@xxxxxxxxxxxx<mailto:aczerw@xxxxxxxxxxxx> [cid:image002.jpg@01CBC1F5.0B54DB90] THESE COMMODITIES, TECHNOLOGY OR SOFTWARE WERE EXPORTED FROM THE U.S. IN ACCORDANCE WITH THE EXPORT ADMINISTRATION REGULATIONS. DIVERSION CONTRARY TO U.S. LAW IS PROHIBITED.