Ender3 Microswiss DD Axial Fanduct W/ Toolhead Sensor And CRTouch Mount 3D Printer Model

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The file 'Ender3 Microswiss DD Axial Fanduct W/ Toolhead Sensor And CRTouch Mount 3D Printer Model' is (stl) file type, size is 718.5KB.

Summary

A minor modification of Print2Win's excellent all-axial fan duct assembly for the MicroSwiss Direct Drive Ender 3 toolhead (the POM wheel version of the toolhead kit, not the linear bearing version). This works particularly well with Noctua A4x20 40mm fans for near-silent printer operation. A4x10 fans should also fit, but I haven't tested.

All adjustments in this remix are based on the v4.2_TI version of the original models.

Fan Duct

This adds a post-extruder filament sensor to the duct for use with MMU systems like the Enraged Rabbit Carrot Feeder(ERCF/HappyHare documentation refers to this as a Toolhead Sensor). This cuts the cable management channel in half - you'll have to route over the sensor.

Front Fan Adapter

I've removed the probe mount, and adjusted the BLTouch mount to be usable with a CRTouch (should still be BLTouch compatible, but I haven't tested).

Finally I've flipped the CRTouch mount to the left side of hotend fan - since the Ender 3 can overshoot the X+ side of the bed more than the X- side, this makes more of the bed reachable by the touch probe.

Cable Management

The optional cable management guide is completely unchanged from Print2Win's model.

Printing

All parts in this remix should remain interchangeable with the original (v4.2_TI) models, so if you need just the filament sensor, or just the CRTouch mount, you can print only the duct or only the fan adapter, accordingly.

No supports should be necessary.

Assembly

Use M3 threaded inserts for both part cooling fans (8 in total), and M3x10 screws to mount the fans.

Use M3 threaded inserts and M3x10 screws (4 in total) to mount the front fan adapter to the cooling duct.

Use 3 M3x10 or M3x12 screws directly into plastic to mount the heatbreak fan to the front fan adapter.

Use 3 M3x10 or M3x12 screws with washer to mount the entire assembly to the MicroSwiss plate.

Use 2 M3x10 without nuts or 2 M3x12 with nuts to mount the optional cable management bracket.

Use two M3x10 or M3x12 screws with washers and nuts to mount the CRTouch.

The toolhead sensor uses an Omron (or clone) D2F-01F microswitch, a 5.5mm diameter ball-bearing, two M2x10 SHCS/BHCS screws, and two M2 nuts - this should be exactly the same hardware and assembly used by the ERCF Cottontail pre-gate sensors and StealthBurner-based toolhead sensor.

You'll need to cut a small section out of your bowden tube between the extruder and the heatbreak, and place a retainer clip onto the bowden tube between the extruder and sensor to prevent the tube from getting pulled up into the extruder gears when retracting.

Probe Calibration

Here are the probe offsets, though I always recommend calibrating these yourself in case there are small variances.

[bltouch]
x_offset: -34.0
y_offset: -40.0

I found that due to the dramatic y_offset of this toolhead, I needed to enable axis twist compensation in Klipper to get satisfactory bed meshes, whereas this was not necessary with the stock toolhead. Your experience may differ.

Toolhead Sensor Calibration

These are the distance parameters for using the post-extruder sensor (toolhead sensor) with Happy Hare.

toolhead_extruder_to_nozzle: 71
toolhead_sensor_to_nozzle: 48

Cable_Guide.stl 254.9KB
Ender3_Microswiss_DD_Axial_Fanduct_with_Extruder_Sensor.stl 1.2MB
Front_Fan_Adapter_CRTouch_Left.stl 166.4KB
Front_Fan_Adapter_CRTouch_Right.stl 149.4KB