Qidi Box Q2 Hub Y-Adapter (ECAS04)
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Fixes PTFE tube slip on Qidi Box Q2 Hub. Replaces stock holder with 4x ECAS04 fittings for secure, reliable retention.
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Y-Adapter for Qidi Box Q2 Hub (for ECAS04 Fitting)
Version V1 by @StarCom Lab
Description
This mod is designed to solve the problem of unreliable PTFE tube retention in the stock 4-channel hub. The standard solution does not provide sufficient clamping force, which causes the tubes to slip out spontaneously during printing. The proposed Y-shaped adapter completely eliminates this drawback by using reliable ECAS04 pneumatic fittings.
Print Settings:
Material: ABS etc...
Layer height: 0.12–0.16 mm
Walls: 3
Top/bottom layers: 8 each
Infill: 40%, Grid / Cross-hatch
Supports: only under the mounting ears (organic/tree supports recommended)
No supports required for the Y-shaped fitting section
Bill of Materials (BOM):
Screw M3×30 mm, round head, hex socket (DIN912) - 1 pc.
Brass heat-set insert M3×3×4.2 mm - 1 pc.
ECAS04 pneumatic fitting - 4 pcs.
Assembly and Installation Instructions
Caution! Before starting work, make sure the printer is disconnected from the AC mains (220 V).
1. Disconnect the ribbon cable connector from the hub on the printer.
2. Disconnect the 5 PTFE tubes from the stock hub and place the hub on a workbench for convenient disassembly.
3. Unscrew the 4 screws connecting the two halves of the hub, separate them carefully, being careful not to lose the internal parts!!!
4. Unscrew the two stock screws M2×5 mm connecting the hub cover to the fittings. Remove and discard the cover — it will no longer be needed.
5. Remove the spring and the mating part with the 4-position mechanism, set them aside. Important: the stock cross-shaped part inside the hub must remain in place!
6. Press the 4 ECAS04 fittings into the Y-shaped part of the adapter. The model is specifically designed to be collapsible for ease of installation.
7. Heat-set the brass insert M3×3×4.2 mm into the part with the mounting "ears".
8. Secure the half of the adapter with the "ears" onto the hub using the stock M2×5 mm screws.
9. For precise positioning and to prevent rotation of the halves, insert two pieces of filament 1.75 mm in diameter and 4 mm long into the special holes on both parts of the adapter.
10. Align both halves of the adapter and fasten them together with the M3×30 mm screw.
11. Assemble both halves of the hub housing, tightening them with the stock screws.
12. Reconnect the ribbon cable connector, install the hub in the stock mount on the rear panel of the printer, and connect the 5 PTFE tubes.
Finalization
Turn on the printer. Thanks to the use of precision ECAS04 fittings, you no longer need to worry about the quality of tube retention — the connection will be reliable and airtight throughout the entire print cycle.
Author: @StarCom Lab