NovaPro V4 - Flex Shaft Driven Dual Feed Gear Extruder

thingiverse

This appears to be a detailed guide for assembling and installing an extruder assembly for a RepRap 3D printer, specifically designed for use with an E3Dv6 hotend. Here's a step-by-step breakdown of the guide: **Step 1-5:** * Assemble the bondtech gear and its shaft in between Novapro_4_Half_1_RH_2_0_a and Novapro_4_Idler_Half_2_RH_2_0_a. * Install the idler assembly with a 20mm long M3 bolt. * Fit the idler latch over the idler, then install the spring, another washer, and a 22mm long M3 bolt to complete the M3 tensioner. **Step 6-8:** * Install 2 M3 heat set inserts into Novapro_4_blower_duct_and_30mm_fan_mount_2_0_a. * Route the power cables up the back of the extruder using the provided path. * Set Novapro_4_Lower_back_duct_3_1_b in place and route the main hotend power and thermistor wires up via the cable passthrough. **Step 9-12:** * Mount the blower fan using two 20mm cap head bolts. * Bolt Novapro_4_Blower_fan_duct_intake_extension_2_1_a to the main fan mount using 2x M3 8mm bolts. * Take the worm gear and the 5mm shaft, and epoxy the shaft inside the worm gear. **Step 13-15:** * Fit the drill bushing up into Novapro_4_top_gear_housing_1_0_a and slide that assembly up onto the flex shaft assembly where it meets Novapro_4_Flex_cable_retainer_extruder_side_2_1_a. * Secure the worm gear assembly to the shaft using the setscrew. * Slide a 85-2Z bearing over the 5mm section of the main shaft protruding from the back of the brass gear. **Step 16-18:** * Install a second 85-2Z into the Novapro_4_tbottom_gear_housing_1_0_a and secure both housings to the main extruder body using 8mm M3 bolts. * Tighten the zip ties so they are flush to the back of the mount. **Notes:** * The Taz stock firmware motor direction is reversed from what this extruder needs. You may either alter the firmware or change one of the coil pairs on the motor to reverse it. * The Esteps should theoretically be something like 435, but further testing is required at this point.