Re: Window Motors Becoming Hot/Warm
 

Guys,
There needs to be a little more info given before jumping to conclusions. David said he had the motors sitting on the table. David, the left hand and right hand window motors are not identical so merely programming for the same speed does not make the motors run the same. While initially it seemed that the window motors suffered problems with the Jags, it was not always the case. A lot has to do with the application. The locking pins are not a new phenomenon but have been around for a long time. John Novak reported opening a 2001 motor and finding them. They (the locking pins) are very small and light and could interact with the switching frequency except when at full throttle.
It is possible that the higher switching frequency of the Jags may cause additional losses in the armature. These are called 'eddy current' and can cause heating. However, I have not seen a discussion on this topic and have no data that either controller would cause heating.
David, if the motors were coupled together and one was doing much more work, it could/would get hotter. Meaning if one motor was slightly faster, it would be pulling the other motor along.
CAN will not get you to Einstein. We have a long history of success and don't use the Jags so therefore we don't use CAN. What gets you to a win is a robot that doesn't break, can perform a variety of tasks, is driven by students who have practiced like crazy and a strategy team that collects the needed data for alliance selection.

An old musician riddle is "How do you get to Carnegie Hall? Practice, practice practice."