Bowden upgrade from prusa p3

thingiverse

Prusa P3 relies on a direct extruder, making the x-carriage quite heavy since it holds the x-axis motor. In contrast, the bowden extruder separates the motor from the hotend, resulting in a lighter x-carriage that minimizes swinging during fast returns. This leads to better printing results. The j-head mount attaches securely to the existing x-carriage screw holes. I purchased the extruder parts from AliExpress for as little as $7. You'll also need a J-head hotend, preferably equipped with a cooler fan, and a teflon (PTFE) tube. After installing the bowden and hotend mount, before attaching the tube to the hotend, I extrude 5 cm of filament and measure the actual length coming out of the tube ("E" in millimeters). Check your firmware for the steps required for 1 mm extrusion, which is approximately 700. Multiply 700 by 50 to get 35,000 steps. Then divide 35,000 by "E". For instance, if you measure "E" as 120, then 35,000 divided by 120 equals 291.667. Simply replace 700 with 291.667 in your firmware. You can also check out my spool-holder that holds the bowden extruder motor at https://www.thingiverse.com/thing:2766928 and my Nozzle Duct at https://www.thingiverse.com/thing:2771787.