Qidi Q1 Pro - BTT Eddy Duo Mount

This is my version of a mount for the BTT Eddy Duo which places it underneath the toolhead of the Qidi Q1 Pro. This is to be used with the eddy-ng implementation by Vlad. It replaces the stock probe entirely, utilizing the Eddy Duo to home, probe and determine z-offset via “tap”. Consult the eddy-ng wiki on how to set it up. You will need to be on a “custom” firmware running mainline klipper as I doubt this is compatible with stock firmware. If you're tinkering with this I assume you relatively know what you're doing. I've provided my klipper config as a reference. 

Note: this is a mod I made for myself so I take no responsibility for any damages that might incur as a result of you trying to implement this. 


Printing and BOM

Use a heat-resistant material. I used ASA for the mount and eddy case, ABS-GF25 for the rear toolhead cover. The provided .3mf files include the settings I used, you can use those as a reference for your purposes.

You will need:

• M3 hex nuts x 2
• M3x8mm screws x 2
• m3x14 or 16mm screws x2

IMPORTANT

You will need to remove the Eddy Duo from its stock case as it will not fit otherwise. After removing, install the slim case onto the Eddy Duo. You will also need the custom rear cover as without it there will be no slot to route the USB cable for the eddy through. You could alternatively make a cutout in the stock one, your choice.

In order for this mount to work, you will need to clip off the two tabs highlighted in blue from the toolhead carrier plates, otherwise you cannot fit the probe properly. You can use the slot in the mount to zip-tie and secure the wire for the eddy to provide strain relief.

Installation

I would recommend removing the front cover, hotend and rear cover during the install process. First place the m3 nuts in their slots in the mount and then secure the mount to the toolhead plate underside via two M3x8mm screws. Tighten until finger-tight, maybe a bit more but DO NOT use too much force or over-tighten, that will cause the inserts in the plates to come loose or damage it. Connect the wire to the eddy and route it through the slot, line up the eddy and use two M3x14 or 16mm screws to tighten and secure it in place. Tighten until snug, do not over-tighten. Use a ziptie to secure the cable.

Route the cable through the back, slotting it between the upper left half of the rear carrier plate and toolhead board, to the back of the printer. When installing the new custom rear cover, make sure the cable is between the slot.

When re-installing the hotend, make sure to hold it in proper alignment while screwing it in.

Configuration

I have provided my own config files as a reference but make sure to setup your own properly for your setup. Consult the eddy-ng wiki. You will need to specify the X and Y offsets, which are:

x_offset: 11.2
y_offset: 14.0

Additionally you will need to adjust z_tilt and screws_tilt_adjust as they are dependent on the location of the probe which has changed compared to the stock probe. You can find the appropriate values in my config in the eddy_ng.cfg file in the hardware folder.

Do not blindly copy my config as I have done various mods and changes so it is setup for my hardware. That said, the eddy_ng.cfg file contains the important relevant stuff. Once the probe and eddy-ng are installed, be sure to reference the eddy-ng wiki to calibrate and setup “tap”. You need to make appropriate changes to your PRINT_START g-code macro to incorporate the new functionality of the Eddy Duo and eddy-ng. Again, reference the wiki and my own config but tailor it for your setup/needs.

Final Notes

I've included STEP files if you would like to make your own changes, variants and etc. Cheers!