Seismograph using 3D printed parts making recipe 2023-03-04

My poster presentation at JpGU2022 is here,

<Some points to note>

1) Thermal form change


PLA and PETG are weak to hot temperature, so the long-time form change is a problem.
Particularly, the deterioration or the bending of the pendulum and the pillar is a big problem.

Thermal bending of the pillar and you can see the pendulum mass is touched on the bottom.

A solution: to attach acrylic plates to support the pillar against the thermal form change.
Also, the use of PETG rather than PLA at the tropical region is better.
Because the PETG is more withstanding against heat.