Replace Drybox Adapter


Summary

Replacing your drybox adapter is a relatively simple maintenance operation and should take no longer than 30 minutes to finish. You must perform the procedure if your adapter is damaged from the natural wear of printing our rugged material.

NOTE: This procedure is slightly different on Industrial and Desktop machines. These differences will be clearly noted throughout this article.

NOTE: This procedure requires removing your material from the drybox for more than the recommended time; in that time, the filament can absorb enough moisture to render the entire spool unusable. Do not perform this procedure unless you have an airtight receptacle in which to store your material or you have just run out of material. 

Required Tools

1 x 2.5 mm hex wrench (Industrial Series Only)

2 x 11/16" Wrench

1 x 5/8" Wrench

Identifying your drybox adapter

Every Markforged composite printer ships with a drybox for storing print material during use. The material feeds out of the drybox through the drybox adapter, a small metal assembly inserted in the side of the drybox.  Below are images of the drybox adapter on both the Industrial and Desktop machines.

01_desktop_dba.png02_industrial_dba.png

On both Desktop and Industrial printers, two types of drybox adapter are seen in the field. Older units shipped with brass drybox adapters; newer units have hardened steel adapters. Only brass drybox adapters need to be replaced. Below are images of brass (left) and steel (right) drybox adapters.

03_brass.jpeg04_steel.jpeg

If you have a brass drybox adapter, continue with the replacement instructions.

Prepare your drybox

Remove remaining plastic from your printer

  1. Confirm you have an airtight container of appropriate size to store your material in during the following maintenance procedure. Improper storage will ruin the material.
  2. Unload the material from your machine, following these instructions.
  3. Manually wind the material remaining in your feed tube back onto the spool.
  4. Remove and store your material spool in the airtight container with the desiccant packs from your drybox.

Uninstall your drybox adapter

Remove the drybox adapter (Desktop)

  1. Remove the feed tube from the drybox by pressing down on the orange push-to-connect fitting while gently pulling the feed tube out of the drybox.
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  2. Holding the internal hexagonal feature on the drybox with one 11/16" wrench, loosen the external nut on the drybox adapter with the other 11/16" wrench.
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  3. Remove the external nut from the adapter and push the internal feature in toward the drybox.
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  4. Remove the other half of the adapter from the inside of the drybox.
  5. Separate the rubber washer from the threaded portion of the adapter, and set the rubber washer aside for reuse. It will be needed for the replacement adapter.
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Remove the drybox adapter (Industrial)

  1. Remove the feed tube from the drybox: reach through the hole in the rear of the lower cabinet and press down on the orange push-to-connect fitting while pulling the feed tube away from the drybox.
  2. Use a 2.5mm hex wrench to remove the 6 x M3 screws securing the drybox to the floor of the lower cabinet.
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  3. Carefully remove the drybox from the lower cabinet.
  4. Holding the internal hexagonal feature on the drybox with one 11/16" wrench, loosen the external nut with the other 11/16" wrench.
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  5. Remove the external nut from the adapter and push the internal feature in toward the drybox.
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  6. Remove the other half of the adapter from the inside of the drybox.
  7. Separate the rubber washer from the threaded portion of the drybox adapter. Set the rubber washer aside for reuse; it will be used for the replacement adapter as well.
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Install a new drybox adapter

  1. Unscrew the the nut from your new steel drybox adapter. 
  2. Place the rubber washer from the old brass adapter around the threaded portion of the steel drybox adapter.
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  3. From the inside of your dry box, push the threaded portion of the drybox adapter out through the hole in the drybox wall.
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    Industrial (left), Desktop (right)
  4. Using your fingers, tighten the nut onto the threads of the drybox adapter.
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  5. Holding the internal hexagonal feature on the drybox with one 11/16" wrench, tighten the external nut onto the drybox adapter with the 5/8" wrench one half turn past finger-tight.

Reinstall your drybox

Replace your drybox (Industrial)

  1. Close your drybox and carefully place it in the lower cabinet.
  2. Align the front locating slots on the drybox bracket with the screw holes in the floor of the cabinet. Loosely install the M3 screws in these slots.
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  3. Repeat the same for the rear locating slots.
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  4. Shift the drybox towards the side-to-side as needed to align the final two screw holes with the holes in the cabinet.
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  5. Securely tighten all six screws to lock the drybox into place.
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Re-attach the feed tube and load material

  1. Press your feed tube into the black plastic push-to-connect fitting on the drybox adapter.
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    Industrial (left), Desktop (right)
  2. If you removed your desiccant packs back from the drybox, replace them.
  3. Load material into your machine by following these instructions.