通过利用两台步进电机实现悬挂物体运动轨迹的控制，实现从点对点的运动、任意设定圆心的圆周运动，曲线运动。-through the use of two stepper motor to achieve flag objects trajectory control from a point-to-point movement, arbitrary set of circular motion Center, curve campaign.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001064s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.081332s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001156s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001149s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001165s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.003186s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.000905s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.003836s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.016532s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001132s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 316727 [ RunTime:0.020315s ]
