3D Filament Spool Scale / Meter Indicator

thingiverse

This is an Arduino-powered scale designed to hold your 3D filament spool and accurately calculate the remaining filament in meters. The accuracy of this system ranges from approximately plus or minus one meter when a whole spool is placed on it, and plus or minus five meters when the printer's pull force meets the spring tension from the tighter coiled filament against its own weight as it runs closer to being empty. You will want to incorporate my remixed spool holder for optimal results. It fits seamlessly within your standard printer tray design but feel free to make adjustments as per your specific requirements and can be found at http://www.thingiverse.com/thing:804325 Usage: Firstly, boot up the scale without the spool on top, after which you'll receive a prompt inquiring about filament thickness. Pressing and holding down the 'Tare' button indicates use of 3mm filament. In your configuration section, it is recommended that you alter average weights per filament diameter used along with average spool weights to gain maximum accuracy for all preferred materials. Materials required for this setup are: - 5 KG Load Cell (Available at http://amzn.to/1GDuutM) - HX711 Weighing Sensor AD Module Dual-channel 24-bit A/D conversion shielding found at (http://amzn.to/1JGV7V0) - Arduino Uno board purchased from (http://amzn.to/1FDVNYJ) - Display: a 20 x 4 LCD screen obtained from (http://amzn.to/1DQi4OA) - A set of Male to Female jumper wire bought from (http://amzn.to/1JGVy1w) and - A pack consisting of assorted 3m and 4m bolts (obtained at the same aforementioned link). You may find the necessary code along with all libraries for setting this scale up by going to http://github.com/smokinpuppy/SpoolScale. A repository on github located at https://github.com/bogde/HX711 hosts library for Hx 711 and is also required. Referencing readme file shall instruct you further, and a successful calibration can only be guaranteed upon thorough knowledge of its detailed documentation. Wiring scheme: Arduino (HA) 5V -> VCC 5V - > A4 3-0 D3 -> RS 4-1 GND (Hx Gnd -> HX711Gnd 5 - (SIN 5 - K+Knobs Button Gnd 0 9- D3 7-> SIN A11 - (RS D12 D6) 5 -> VDD) A15 LCD display wiring: Ar VCC LCDV0 + (sin sin) RS (display RSD) 10D(8 E + 12 E+ E - ) 1S4 VDD S + 20 LCD 21LCD D 1 A A14 LCD Display (pin LCD (Sin pin display (GND Ar) Knob (display Pin Ar pin Display VSS RW pin Knob LCD Gnd Display - V0 + display + RS - + + pin A4 1 Display Display Ar button Button) D + SIN D4 LCD D11 E) (button LCD - LCD J pin 5 D8 A10 Ar Sin sin button Pin 15 GND A14 GND pin K knob Display Knob display display pin Ar) Vcc + pin sin knob sin button Ar Knobs Display sin LCD Gnd Pin D display Knob LCD Sin sin + VSS pin ar VSS GND RW button A1 D 10 D8 G 5 Knob VDD Display Knob sin (Pin J display J20 A10) sin Button button Display 5 pin Ar D9 LCD Print settings Printer Prusa Mendel Layer thickness : 0.2 Raft: None Layer thickness : 25% When setting up, use all instructions from this manual. 1.) Make sure your printer tray is clean. 2.) Start to boot the display module, and the device should automatically initialize itself 3) Once initialization process completes make it aware whether you are using three-milimeter-thick material. By pressing hold 'tare' button 5 Print and start on layer 0.2 mm and then follow print instructions and have no raft or support on a three milimeters of the material.