Prusa i3 Mk2 Strain Relief for X Motor

thingiverse

The Prusa i3 Mk2 boasts impressive cable management, particularly for the extruder motor cables, which receive adequate strain relief. In contrast, the Y and Z axis motor cables don't require additional support due to their minimal movement. However, the X axis motor's up-and-down motion with the Z axis poses a challenge. Since there is no built-in strain relief where the wires exit the motor and enter the spiral-wrapped harness, these cables are more prone to damage over time. As the spiral wrap is the most flexible point, it naturally bears the brunt of movement and bends accordingly. To address this issue, a small modification can be made by securing the wiring harness directly beneath the motor. This is achieved through a single M3 x 8mm machine screw inserted into an unused mounting hole on the front of the motor. Additionally, a cable tie is used to firmly secure the spiral-wrapped wiring harness in place. The print process itself is straightforward, requiring no supports and minimal disassembly of printer components. Once printed, the part can be easily fitted without any additional modifications. Print Settings: Notes: I employed standard settings for printing on the Prusa i3 Mk2 with Prusa PLA using a 0.2mm profile. Since this part is far from the hot end, PLA should suffice. Alternatively, ABS or PET could be used if your motors tend to run hot; however, my setup operates at moderate temperatures using the "Silent" setting.