3D Upfitters LulzBot Mini 2 R1 Посібник з монтажу - Сторінка 14

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3. Re-tighten the screws to hold the panel.

Repeat the product, going around the enclosure looking to make sure all of the panels

are ﬂush to each other.

10. Managing Enclosure Temperatures

There's not much to a 3D printer enclosure. Although ours look fancy, functionally they're not

much diﬀerent than putting a cardboard box over the printers since both designs are passively

heated by the beds. How complicated can they be? This section will explain a little about how

they work, and how to manage the temperatures to get quality prints while protecting your

lungs.

We generally get two types of customers:

Those interested mostly in air quality.

Those interested mostly in print quality.

Think Airﬂow, Not Fishtank

The problem is those two goals use two diﬀerent techniques in terms of airﬂow. For the best

air quality, we use the same design as industrial equipment, which uses airﬂow to manage air

quality. Because of physics, the amount of air moving into the enclosure has to be equal to the

air moving out of the enclosure. When the air moves out of the enclosure carrying volatile

organic compounds it can then be vented to the outside or run through an air ﬁlter.

People often ask us if the enclosures are airtight and have a bottom. If your main concern is air

quality then being airtight doesn't buy you anything since the particles will just ﬂoat out when

you open the door. It's only by maintaining a negative air pressure that the particles are reliably

kept away from human operators, which means having openings for air to both enter and exit

the enclosure.

If the maximum internal temperature is the goal, then being airtight also doesn't help since the

main cause of heat loss is through conduction through the sides of the enclosure, not through

small amounts of air loss. A bottom doesn't help either since while heat doesn't rise, hot air

does, and thus almost all of the heat of an enclosure is at the top. A bottom is helpful,

however, if your table is too small for the enclosure.