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timkrahmer

tenok - print parts for the adaptive vacuum cleaner

by timkrahmer Jun 30, 2019
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Hi,

would it be a problem to use PET-G for everything? Why are some parts printed with ABS?

Br
GatuRatz

Hi,
it's a precaution. All ABS parts go into the motor chamber of the vacuum cleaner and temperatures may theoretically rise above the glass transition temperature of PETG (Tg around 80°C).
In the instructable for tenok I suggest to use a 80°C-rated heat switch that cut's the power somewhere between 72°C and 88°C due to the relatively high tolerance of that switch, so you're super-safe with ABS (Tg around 105°C).
So if you think about using PETG for all parts, you should also change the heat-switch to a 70°C-rated version. On a hot day with a rather full bag it might however shut down then quite soon and would need to cool down to turn on again.

Best, Tim

Hi timkrahmer,

thanks for the explanation, if I happen to build one I will keep this in mind :-)
Or perhaps until then I will have a printer which can use also ABS.

Br
GatuRatz