High Clearance Fire Safe Acetone Vapor Smoothing Chamber
thingiverse
After narrowly avoiding a galley fire and having my 3D printer confiscated by my superiors, I realized that brushless fans perform effectively in acetone vapor chambers, but their wires are not designed to withstand the harsh environment. This device extracts electricity from the vapor while utilizing a shaft to drive a fan blade, circulating the vapor within the chamber. Although it's not a polished solution and requires some minor fitting and epoxy, it's both effective and fire-safe. Additionally, it offers a larger capacity and height clearance than most vapor chambers. List of materials: Collet Style Motor Mount Motor to Shaft Adapter Walmart USB Fan with Metal Blade Large Pot with Glass Lid Wire Running Rods Epoxy Putty Epoxy Glue 3/8 Hose Barb to ½” NPT adapter (nylon) – drill ID to enable loose fit of shaft prior to assembly Electrical Tape 2 Nuts to secure fan blade (thread type unknown) Assembly / Fitting Instructions: Remove the handle from the pot lid, exposing a small hole in the glass. Install the hose barb adapter into the lid handle hole and secure it with epoxy putty. Ensure it's square and perpendicular using the motor housing as a reference point. Install the motor housing. If the fit isn't tight, use epoxy putty to secure it. Use epoxy glue to attach the motor and shaft adapter to the motor. Install the motor assembly into the collet style adapter and determine the required length of the shaft. Cut one wire running rod to the desired shaft length (ensure a pin thread on the bottom of the shaft). Install the shaft from the concave side of the pot lid and secure it in place by gluing or using electrical tape for an interference fit. Once the motor and shaft are installed, wrap a few rounds of electrical tape around the top of the collet housing to compress the collet around the motor. If there's a loose fit, apply a small amount of epoxy to provide backup torque and immobilize the motor. Optional: Secure the wire to the motor housing using epoxy. Install the fan onto the pin side of the shaft and secure it with one nut. Use the second nut to bind the first nut and prevent backoff. Note that I set the fan blade to blow upwards instead of downwards. Utilization: Place paper towels on the bottom of the pot and soak them in acetone. Use an aluminum or inert object as a standoff from ABS parts to be smoothed. Operate the machine outdoors or in a well-ventilated area to prevent vapors from disturbing family members or other co-occupants who might stage a mutiny.
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