Filawinder Filament Guide System v2.0

thingiverse

December 22 Updates: Center piece guide now has 2 holes for 6mm and 4mm PTFE tubes to go through. Now using 5-8mm flex coupler that are commonly used in 3D Printers. (see pictures) For that reason, changes to the left and right frames were made. Updated spool gear and drive gear, so that magnet is closer to the sensor. Drive gear must be tight fit. No retaining screws used. Do your self a favor and 3D print my large spool. Hole on the side effects the distance to the magnetic sensor. If too far, rotation may not count. System works great. Firmware changes are final (i think) MOTOR: Any motor that looks the same as pictured will work. You need to figure out how to attach it to the threaded rod. I used 5mm to 8mm coupler to do that. Works great if you get it centered. The way this works is: When spool makes full turn, 5V relay will activate motor that moves the guide. Guide move distance depends on how long relay stay active. That time is changed in firmware. 25RPM motor set to 3 seconds will move around 1.75mm so you get the idea. Once guide reaches either end of the rail, it will push momentary button placed on either end. Pushing those buttons reverses motor direction http://soliforum.com/i/?iAI3WRn.jpg Threaded rod goes through the nut that sits inside the guide piece. So when motor turns, guide moves by the nut inside it. Momentary buttons on each end activate very special relay (bistable). That relay is triggering the [two channel relay] that does the reversal. Material required: Second 12V 1A power supply to drive 2 channel relay and the motor separately. 12v 2 channel relay (basic) 5v bistable relay (connect terminals and it closes, connect again and it opens) 5v relay (basic) Motor 2 momentary push buttons 8mm diameter threaded rod and a nut. Length of the rods is chosed based on the distance guide has to travel. Wider the spool, longer travel needed. rod is about 220mm 8mm smooth rod. linear motion bearing LM8UU (sits inside the guide) 12V 30x30x10 cooling fan (optional) If cooling fan mount is used, consider printing my own drive gear for needed clearance. Screws, wires, connectors, soldering tool if you don't want to deal with connectors. This is relay wiring diagram and the kinds of relay i used. http://soliforum.com/i/?qPoWHij.jpg