I've never noticed any smell from PLA filament. ABS would definitely smell just
like cutting ABS with high speed tools that melt it some.
The GRBL, Marlin and other 3D printer firmwares have the ability to monitor
things and shut everything down if a fire potential situation happens. Some
printers have had a bit of an issue where the manufacturer chose to not enable
those features, then after a few incidents either the users or the manufacturer
released updated firmware with the features enabled. Google 3d printer fire to
find various ways some have lit up, and things to look for to ensure yours
won't.
Aside from the firmware issues, common causes of flammen tend to be wires to
the hot end or heated bed rubbing and wearing through insulation, or parts for
the bed mounting being sharp and cutting into the circuitry. At least one case
was the hot end heater fell out of the nozzle block and the printer was one
with runaway heat monitoring disabled. Since the thermistor wasn't reading the
heat, the printer kept cranking up the juice to the heater. Basically an if
expected temp output != commanded temp input then something's wrong so turn
off. The one with the bed mounting issue was one of those lower cost Prusa
copies. The fix was simply four fiber washers, before the metal washers cut
through the insulation coating on the underside of the bed plate.
You'll want to make sure the wires to the heated bed are secured so they don't
flex where they're soldered. PITA to discover that when one breaks loose then
you have to take things apart, and rig up proper securing for the wires.
On Thursday, May 28, 2020, 8:04:15 PM MDT, Gene Heskett
<ghesk...@shentel.net> wrote:
For Dee, whose COPD is getting close to the end, not tolerable then, so I
may as well put it in the shed and build a box around it.
Does it need a fire extinguisher when doing lights out stuff at 3AM?.
Thanks Andy.
Cheers, Gene Heskett
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