INDX Low-Profile Tool Docks for CORE One/+ | BridgeDock

Start here

Choose your kit: 4 tools (1–4) or 8 tools (1–8). The table below is the complete printed-parts list for a simple, single-colour build with plain front plates. Print the quantities shown, then follow the shopping list and assembly instructions below.

• The first four files are at the root of the Files tab. The two plain V133 plates are in 04 - L plates with six lines (V133).

• For 4 tools, print only 4 plungers and 4 caps, even though their filenames say “print_8”. Left and right are viewed from the front of the printer. Do not mirror the banks or plates.

• Material: PETG is recommended for the banks, plungers and caps; the front plates can be PETG or PLA. See Print tips for orientation and supports.

Optional appearance: illuminated front plates replace the plain plates; do not print or stack both styles. For numbered illuminated plates with six lines, use Numbered_L_tools_1-4_six_luminous_lines_flush_v133.3mf and, for 8 tools, also Numbered_L_tools_5-8_six_luminous_lines_flush_v133.3mf from the same V133 folder. Assign your filaments and keep each plate as one object.

Optional numbered caps: in 01 - Optional numbered caps (STL + 3MF), choose one engraved STL or two-colour 3MF per tool (1–4 or 1–8). These replace the plain caps, one for one.

ColorMix is optional. STEP files are editable sources. The ready-made ColorMix G-code prints the front plates only, not the complete dock set. Check the shopping list for magnets, screws, inserts and reused parts before printing.

About BridgeDock

I designed BridgeDock to open up the view through the CORE One door and stop the stock dock springs from creaking. Its slim dock banks and low L-shaped front plate use magnetic plunger return, leaving more of the print visible and letting the chamber LEDs light it without being pushed down by the stock plate.

It clamps onto the existing sheet-metal bridge without cutting or drilling. After more than 120 print-and-test iterations, my own printer has completed over 20,000 tool changes without a failed pickup or drop-off.

Compatibility: Prusa CORE One / CORE One+ with INDX. Use Start here for the 4- or 8-tool parts list.

Other front plate options

Start here covers the plain and numbered illuminated V133 plates. If you prefer a different appearance:

• Illuminated INDX logo, no tool numbers, with six lines: choose the Left_L_INDX_six_luminous_lines_flush_v133.3mf and, for 8 tools, Right_L_INDX_six_luminous_lines_flush_v133.3mf files in 04 - L plates with six lines (V133).

• INDX logo without the six-line design: 03 - Optional INDX-only front plates (V132) contains decorative two-colour, engraved single-colour and illuminated versions.

• Original numbered plates: the V124 individual 3MFs and optional ColorMix project remain available at the root of the Files tab. The ColorMix setup below applies to that V124 project.

Flush luminous lines

The V133 numbered and logo-only plates with six luminous lines now have their line faces flush with the front surface. The 0.60 mm recess is gone. Line faces remain separate 0.40 mm material volumes: choose clear or translucent filament to illuminate them. The split plates keep their mounting positions.

One-piece front plates (V134)

Prefer one full-width plate? Folder 05 - One-piece L plates - all styles (V134) has all seven current styles: plain with recessed lines; numbers and logo with dark recessed lines; numbers, logo and flush luminous lines; logo and flush luminous lines without numbers; smooth plain; decorative logo (colour 3MF or engraved STL); and illuminated logo with a local central collector.

Each one-piece version joins the existing central faces directly, without extra infill, bridges or reinforcement. Print decorated face down and rotate diagonally in your slicer. Choose your printer and filaments; the 3MFs are aligned material models, not printer profiles. The divided plates and the separate V124 ColorMix project remain available.

Print tips

• Plungers: upright, wide opening down, no supports.

• Numbered return caps: numbered face down, no supports. The two-colour face is 0.40 mm deep.

• Numbered front plates: decorated face down. The colour face is 0.40 mm deep: two 0.20 mm layers, or four 0.10 mm layers in the ColorMix project. Check collector overhangs in your slicer to decide whether supports are needed.

• Illuminated details: use clear or translucent filament for the light collector; opaque filament blocks the effect. Brightness depends on the filament and chamber lighting.

For the individual multi-material plates, standard filaments work: opaque black for the body, translucent orange for the numbers, white/red/yellow/green for the logo, and clear or translucent white for the collector. You do not need ColorMix filaments for these files.

Shopping list

To keep your original docks intact, buy a new set of 3 × 8 mm retention magnets: extracting the originals can damage the printed parts.

Tools: hex keys, a marker, a heat-set insert tip, and something flat and soft to push magnets with.

Assembly

Before you start: printer off and cold, all tools removed. Take off the stock docks and front plate and keep every original part: you reuse the seals, their screws and the tool magnets, and you may want to go back.

1. Retention magnets - set the depth first

1. Check polarity first: each 3 x 8 mm magnet must attract the matching magnet on the tool. Upper and lower are different, keep them apart.

2. Push two magnets into each column from the tool side. Leave them slightly recessed.

3. Hold the cold tool fully seated on its locating surfaces, like when it is parked.

4. From the front side, gently push each magnet toward the tool until it just touches. Straight pressure only. No hammering, no levering.

5. Remove the tool and seat it again. It must sit flat, no rocking, no gap. If not, back the magnet off and retry.

6. Repeat on every column. There is no depth stop: the tool is your gauge.

Do this before the inserts, you need the front opening to push the magnets.

2. Heat-set inserts

1. One M3 insert in the lower front socket of each column. These are the bigger front holes, not the magnet bores.

2. Keep it straight and keep the hot tip away from the magnets you just set.

3. Let it cool completely, then check the tools still seat properly.

3. Magnetic plungers

1. Dry-fit one empty plunger and cap first: key in the slot, full stroke, nothing sticking.

2. Stick a 6 x 3 mm magnet to the INDX tool carrier and mark the face that touches it.

3. Press that magnet into the narrow nose of the plunger, marked face out, flush with the tip. There is no depth stop, so press it against a flat surface to get it flush.

4. Take a second magnet and find the side that pushes away the back of the plunger magnet. Mark it.

5. Press it into the cap stem with the marked side facing the plunger. Check that they still repel.

6. Slide the plunger in (key in the slot), fit the cap with one M3 x 6 mm screw. It threads into plastic, go easy.

7. Press the plunger: it should slide freely and snap all the way back. Repeat for every station.

4. Nozzle seals

1. One complete seal (metal strip + silicone) per tool, screwed to the boss under the plate with its ORIGINAL screw. Not the M3 x 8 plate screws.

2. The strip stays straight, only the tip curves down. Keep the silicone on: the nozzle should only ever touch silicone.

3. The seal stays on the plate, not on the tool.

5. Mount it

1. Hook each bank over the folded edge of the sheet-metal bridge. Left bank = tools 1-4, right = 5-8, looking from the front. Make sure it sits fully along its length.

2. The round cutout at each outer end clears the existing light-bracket screw. Leave that screw in.

3. Plug the plate into the front sockets, start all four M3 x 8 mm screws, then tighten evenly.

4. Close the door, it should close freely.

5. With each tool cold and seated, check the nozzle lands centred on the silicone. Do not bend the strip to hide a misalignment.

6. Calibrate and test

1. Move every plunger and tool by hand. If anything sticks, fix it now.

2. Run the dock calibration.

3. Test pickup and drop-off one tool at a time.

Troubleshooting

Dock calibration fails and nothing is in the way. What worked for me: loosen the left and right belt tension screws one full turn each and retry. If it still fails, one more turn per side (two turns max in total). Stop if a belt goes slack. Afterwards, set the belts back to normal tension, run the belt calibration, and re-run the dock calibration.

Why it works: the dock calibration accepts about 1 mm of tolerance, and sometimes that is not enough. With the belts slightly loose the head has a bit more give, the calibration passes, and once you tension the belts again everything runs normally.

Optional: ColorMix project

BridgeDock_V124_ColorMix_ready.3mf is a preconfigured project for both original V124 numbered front plates on a CORE One INDX 8T with 0.4 mm high-flow nozzles. It is separate from the V133 plates in Start here. Open it as a project to retain its colours and settings.

• Orange numbers: 50% yellow, 25% magenta, 25% white. Logo red: 75% magenta, 25% yellow. Logo green: 50% cyan, 50% yellow. These are approximate colour matches.

• BridgeDock_V124_ColorMix_ready.gcode takes about 3 h 41 min and 55 g for the plates only. Use it only with the printer, nozzles and filament order listed here; otherwise re-slice the 3MF.

• ColorMix Black transmits some light through thin walls. For crisper numbers, use opaque black in tool 8.

• Tool numbers here follow the printer screen (1–8), rather than the T0–T7 commands in G-code.