Early Adopter Pre-Order Dimension Control and Spooler/Direct Drive
Filament Dimensional Control: electronics that detect the diameter of the filament and (Automatically) sets the speed of the spooler motor to hold tension on the filament to get the best consistent diameter filament possible. This module will require the Automatic Spooler/Direct Drive to work.
Automatic Spooler: automatically rolls up filament that is extruded onto a standard spool. The module will use motors controlled by the Multistruder Arduino board. The speed will be (Manually) set to hold constant tension onto the filament to get more consistent filament diameter thus better performance. And if you also purchase the filament dimensional control module then the process is automatic.
Direct Drive: automatically similar to the automatic spooler. However it does not spool up the filament it just uses spring loaded rollers to pull the filament to size. Then the open end of the filament goes directly into your 3d printer as it is printing.
HOW EACH MODULE WORKS:
Filament Dimensional Control: Takes 2 3d printed rollers with a grove printed in them for the filament to ride in. 1 roller is pinned to only spin while the other one is free to spin and move up and down a channel. The 2nd roller that is free to move up and down is then held down on the filament by springs on the sides of the pins. To read the diameter a FSR (Force Sensitive Resistor) is placed under one of the springs on the side. The FSR gives you the force that the spring is pushing on the resistor this is then compared to a known reference force of 1.75mm and 3.00mm filament. The controller will then changes settings to get your current force to the target force of the known reference force of 1.75mm and 3.00mm filament. A magnet and a hall effect sensor is then used to measure rpm of the roller this will allow the controller to know how much filament you are extruding at a given time.
Automatic Spooler: Uses a high torque mini motor attached to a spool that pulls tension on the filament as it is would onto the spool to stretch the filament to size. It does this by holding "Tension" on a pulley. it works in a similar way to the dimensional control except the spooler is using a spring loaded pulley on a FSR. This option is needed because as the spool begins to fill up the diameter changes and thus the same motor rpm pulls the filament harder. By using a FSR on a pull the "Tension" will stay constant no matter how full the spooler is. The filament is then guided to "coil" onto the spool with a servo on a rail with a filament guide on it that moves back and forth.
Direct Drive: Works in a similar way to the filament dimensional control except there is no FSR attached to the spring and it uses 2 spring loaded rollers and a high torque mini motor to pull the filament to size as the open end goes into your 3d printer.
This is the early adopter for the 2 main expansion modules for the multistruder to turn it into the machine i call the FilaFactory. These two modules guarantee you perfect filament by adding a loop that checks your filament (Dimensional Control) and a unit that will pull the filament to your desired size which is how the filament making industry does it (spooler/direct drive). For getting a multistruder early for my kickstarter backers/early adopters you will get 50% off the expansion modules.
For pre ordering you will get the dimensional control and either the automatic spooler or the direct drive module. These modules plug directly into your arduino mega controller and it will read your filament and pull it to size and load it onto a spool or pull it as your 3d printer is printing with the open end.
Manufacturing/Shipment of these units will happen after the shipment of the international kickstarter units have been sent out. (Before August at the latest).
About Early Adopter Pre-Order Dimension Control and Spooler/Direct Drive
Size4 in × 4 in × 4 in
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