ERCF2 DIRECT DRIVE MOUNT MOD NEMA17/NEMA14

- 10/13 Added NEMA14 support. FYI NOT BEEN TESTED. - 10/20 UPDATED CALIBRATION INFO - 10/21 UPLOADED 5MM TO 5MM COUPLER ERCF2 Direct Drive NEMA17 Mod – Ingeniously Simple, Remarkably Effective

Upgrade your ERCF V2 with this direct-drive NEMA17 motor mod, designed to enhance performance while preserving the original mounting structure. With minor adjustments, this mod offers a significant boost in precision, torque, and load/unload speeds , streamlining multi-material printing.

Seamless Integration with Minimal Modifications

• Replace the two M3x20 SHCS on the gear_box_back.stl with M3x28 or M3x30 screws.

• Reinstate the original MR85ZZ bearing into the ERCFV2_DD_MOD_NEMA17.stl—identical to the stock setup. Enable support material on the bearing recess for precise alignment.

Performance Gains with Practical Solutions

• Use M5 pulleys for optimal alignment, or add a spacer between the gear_box_back.stl and ERCFV2_DD_MOD_NEMA17.stl. Alternatively, glue the bearing in for simplicity.

• Improved Load/Unload Speed : The NEMA17 motor enhances torque, resulting in faster and smoother filament transitions, ensuring high efficiency for multi-material jobs.

Assembly – A Step-by-Step Guide

1. Coupler Installation : Attach the 5mm-to-5mm coupler before mounting the motor.

2. Motor Mounting : Use M3x8 SHCS screws to secure the stepper motor. The design accommodates long Allen wrenches for easy tightening.

3. Mounting the Assembly : Attach the assembly to the ERCF using the 4 original screws from the previous setup. Ensure that the stepper wires follow the dedicated groove to avoid obstruction.

4. Final Fastening : Insert the M3x28/30 screws into the gear_box_back.stl and tighten the coupler.

Calibration Tips

- Locate the configuration file: /mmu/base/mmu_hardware.cfg . - Keep the original rotation_distance value unchanged. - Update the gear ratio to: gear_ratio: 1:1 Finally, run the gate calibration again to confirm the rotation is correct and everything runs smoothly.

Beta Disclaimer

This mod is currently in beta testing and is still undergoing refinement. Use it at your own discretion. I take no responsibility for any damage caused to your unit during installation or operation.