Toranado Precision Geared Extruder - Legacy Versions

thingiverse

This page supports all legacy versions of the Toranado Precision Geared Extruder. These versions are no longer officially supported, but all necessary information to build one is still available. v2.1 - Toranado Precision Geared Extruder Latest Build Version 1.0 Files and Build Instructions - Hardware Kits are no longer supported Version 1.1 Files and Build Instructions - Hardware Kits are no longer supported Version 2.02 LH Files and Build Instructions - Hardware Kits are the same as the latest released version Version 2.02 RH Files and Build Instructions - Hardware Kits are the same as the latest released version The Toranado Precision Geared 1.75mm Extruder - Current Build v2.02 Why the Toranado? e_steps_per_mm Gear Calculation Significantly lighter than NEMA-17 geared Extruders All-in-one Precision Geared Uses Ultibot's High Performance MK7 Drive Gear Modular Design - All parts are easily printable without structure and in your material of choice (PLA/ABS/PETG). Designed for use with E3Dv6 1.75mm Universal Attractive, like the designer. How I Designed This I met Big Cooter, who pushed me off a cliff. Fine-Tuning Your Extruder Ultibot 1.75mm Drive Gear Several Makers have tried using drive gears other than the one specified from Ultibot. Unless you find a drive gear with the same effective diameter, I do not recommend using it - as the tangent point on the bearing will not apply force in the proper area on the drive gear. It is essential that your bearing aligns well to the drive gear. I am currently looking for ways to include proper drive gears in future kits. The NEMA-14 Stepper Motor The motor I have specified is rated at 500mA, and even at the rated voltage, NEMA14's run hot - be sure not to exceed the rated voltage. Also, you must follow the build Instruction guidelines for isolating the motor heat from the extruder mount - this is critical. How to set the NEMA-14 properly For popular RAMPS 1.4 setups: DRV8825 1/32 stepper - take a DC voltage measurement exactly like this. To properly set the motor current, adjust your potentiometer to get the reference voltage as close to 0.25V as possible. 0.25V = 500mA (0.5A) to the motor. (Any VREF measurement between 0.24-0.26 should work fine). Formula: Measured VREF x 2 = Motor Current Pololou A4988 Driver - measure voltage exactly like this. If you are using drivers from Pololou, to properly set the motor current, adjust your potentiometer to get the reference voltage as close to 0.2V as possible. 0.2V = 500mA to the motor. (Any setting between 0.19-0.21 should work fine). Formula: Measured VREF x 2.5 = Motor Current. NOTE: If you are using certain Chinese clones of the A4988 Driver, the formula is different. See This Post about adjusting your voltage setting on the stepper driver, depending on the type of A4988 that you have. NEMA-14 WIRING to RAMPS1.4 with Arduino Mega 2560