Application macros59Lead-Winder macroThe Lead macro is designed for a machine where it is necessary for the Winder tobe the “Machine Master.” An Inspection machine is one example where this macrowould be useful. This macro has no web tension control.The basic principle of this macro is that the speed reference is set via the keypad orAI and, upon receiving a start command, the drive ramps up to this speed. Pleasenote that the reference set is an rpm relative to core speed and is not line speed(fpm). The drive uses the actual web speed feedback or an ultrasonic sensor (via anAnalog Input) to calculate the actual diameter. The speed output of the Lead to anyFollower is adjusted for the actual diameter; thus, ensuring that the Followers’ speedreference does not decrease as the Lead drive’s diameter increases. Following theLead drive’s reference also ensures the machine ramps up and down at the samerate and s-shape.
