19 January 2019
Automatic Winding Machine V2
This is an automatic winding machine for coiling up small cords, strings, or wires. We needed a way to reliably coil up specific lengths of cord for sale in a kit. This machine is the updated version of my original Automatic Winding Machine, making it more reliable, easier to use, and above all much, much quieter.
The rotary encoder keeps track of the distance coiled with a closed-loop system. This allows more foolproof operation, recovery if the spool hangs up or jams, and the ability to adjust the diameter of the coil without having to change the code.
This version features an LCD display with button controls, easy to edit firmware, more robust encoder guide system, an integrated spool holder, a quiet belt-driven platter, enclosed electronics, and a ton of other tiny tweaks and improvements.
Let me know if you have any questions or need build instructions. I'm happy to provide more detail but will need time to do the full instructional write-up. I can also provide pre-built custom acrylic panels and aluminum plates on request for a small fee.
PLA or PETG
Print the Encoder Wheel and Idler Wheel at high resolution, I used 0.1 mm layer height and 3 perimeters. These can also be printed in flexible filament for more grip if necessary.
Print the Plate Shaft Mount solid (100% infill) to ensure it is nice and rigid.
Bill of Materials
2020 Misumi T-Slot:
Lots of Cast Aluminum Corner Brackets (or print some if you want plastic brackets)
Tubing and Shafts:
1x 8mm x 75mm Round Metal Rod
2x 16mm OD x 215mm Round Aluminum Tube
18x 623Z Flange Bearing
4x M8-1.25 x 16mm Button Head Hex Socket Cap Screws
A bunch of M4 screws, washers, and t-slot nuts
M3 x 50mm Round Aluminum Standoff
1/4" x 12" Aluminum 5052 Plate Disk
2x 12"x12" White Acrylic Sheet
1x Signswise 600p/r Incremental Rotary Encoder Dc5-24v Wide Voltage Power Supply 6mm Shaft
1x Greartisan DC 12V 200RPM Gear Motor High Torque
1x GT2 Pulley 20 Teeth 6mm Bore
1x GT2 Pulley 60 Teeth 8mm Bore
1x GT2 158mm Timing Belt Closed Loop
1x 10A 250V AC Inlet with Rocker Switch
1x Panel Mount USB Cable B to B
1x L298N Motor Drive
1x Arduino Nano
1x 16x2 LCD
2x 40mm Fan
1x 120v to 12v Power Supply (5-10 amp depending on your motor choice)
4x Arcade Buttons
Increased thickness of the cord guide mount.
Created a new bearing-based cord guide to reduce friction.