Blackbox Mechanical Assembly: 18. FDM Tool Adjustments and Installation

Written By: John Gilbert (and one other contributor)
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  1. Lay X-plate flat against the work surface. Set an assembled tool on top as shown using the kinematic coupling as your guide. Using the second image as a guide, fully tighten the tool cooler block in the adjusted position.

    • Lay X-plate flat against the work surface. Set an assembled tool on top as shown using the kinematic coupling as your guide.

    • Using the second image as a guide, fully tighten the tool cooler block in the adjusted position.

    • Apply a small force downward at the location and direction shown.

    • Adjust the angle of the tool so that the distance marked in Red is equal on both sides.

    • Adjust the tool cooler to be flush with the X plate (marked in Blue) while maintaining the equal distance marked in Red.

    • Tighten the (2) tool cooler fasteners.

    • Remove and replace the tool. Confirm the desired locations are retained. Re-adjust if needed.

    • These adjustments are extremely important! If after tightening all fasteners any of the above conditions are not repeatable, address this now!

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  2. Slide tools onto 4mm locating pins of each tool dock. Adjust the protruding length of the guide rods carefully until the cooler block makes full contact with the tool cooler rail (location marked in Red). Perform this for each tool. NOTE: Both rods of each tool must be the same length. This keeps the horizontal plane of the tool perpendicular to the X axis.

    • Slide tools onto 4mm locating pins of each tool dock.

    • Adjust the protruding length of the guide rods carefully until the cooler block makes full contact with the tool cooler rail (location marked in Red). Perform this for each tool.

    • NOTE: Both rods of each tool must be the same length. This keeps the horizontal plane of the tool perpendicular to the X axis.

    • NOTE: The correct length of the rods will allow the tool cooler to meet the rail while still fully supporting the top of the tool. This will also keep the vertical plane of the tool perpendicular to the X axis.

    • Move the leak blocker and wiper assembly upward until the tip of the nozzle lightly contacts the (wider) leak blocker. Secure in this position and repeat for all FDM tools.

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  3. Route the previously installed music wire length(s) into the bore of Print_Toolhead_Part04 marked in red.

    • Route the previously installed music wire length(s) into the bore of Print_Toolhead_Part04 marked in red.

    • Tighten the grub screw marked in yellow to retain the wire. At this time you can properly shape the wires radius and length being sure that all tools can reach all positions in the build area.

    • This steel wire exists to support the filament guide (reverse bowden) tube and tool wiring when tools are parked.

    • Insert one end of a length of PTFE tube into the previously installed push-lock fitting of each FDM tool. Route the other end through the tool dock spacer marked in Blue.

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John Gilbert

Member since: 06/09/2020

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