Tevo Tornado Dual extruder mod

thingiverse

This is a custom dual extruder bracket and fan cover designed specifically for the Tevo Tornado, inspired by the Tarantula duel hot end. I installed two Tarantula extruder motors on top of the frame using their own brackets, removing the Titan stock extruder from the Z frame to save significant weight. The firmware needs adjustments, but after several months of running this setup, print quality is exceptional. On December 31st, 2017, I added more details and a couple of pictures for clarity. I recommend insulating the sides of the fan cover with Kapton tape as they are close to the hot end and may warp above temperatures of around 240 degrees. This mod is based on the Tevo tarantula dual extruder upgrade available here: https://tevo3dprinterstore.com/collections/tarantula-spare-parts/products/tevo-tarantula-dual-extruder-upgrade-full-kit-dual-extruder-cooling-fan-with-two-nema-step-motor However, the Tarantula has a 12V board compared to the 24V on the Tornado, so the heating elements need to be replaced. A suitable replacement can be found here: https://www.amazon.co.uk/gp/product/B06XPDT2T6/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1 The firmware will require adjustments for this setup; I have uploaded the firmware here: https://drive.google.com/drive/folders/1iaJfqGSp5Q7OX_au6vGL6Mc452soXLKp?usp=sharing Be sure to test and verify that it works for your specific setup, as I have set the steps per mm on the extruders to 228 for optimal flow. Measure the offsets between the extruder nozzle tips carefully for your setup; I suggest using tape on the bed and marking the nozzle positions both X and Y. My setup has an X offset of 17.97mm and a Y offset of 0.48mm. For adjusting the nozzle height Z alignment, I recommend leveling one nozzle spot-on and then lowering the head against a steel plate to adjust the other nozzle to identical heights. Please note that installation is entirely at your own risk; this setup works for me but I cannot be responsible for any anomalies.