Reverse PETG Low Temperature Tower for MK4

I had some weird PETG that printed best at the lowest 220°C PETG temperature tower floor. I wanted to check lower temperatures and created a reverse temperature tower (gets colder as it prints upwards).

Seems my PETG might actually be PLA, as it prints best at 190 to 200 and still prints at 180°C

BE CAREFUL WHEN PRINTING and watch your print. These temperatures are below what PETG normally prints at but it was useful for me to check how low I can go.

The temperature is reduced by 5°C every “x1 mm" (11, 21, 31, …), I enabled the “Z-Index” in my printer display to better gauge when the next temp change will be. I had to abort the print of the 2nd tower because the print got unusable bad at 175°C

Note that I the temp tower is higher than needed in the project file and just has a “remove” block on top. This allows to make the tower higher again (with updates to the gcode). Just move the block by 10mm up or down if you want to print more or less floors. The online model preview looks wrong as a result.

Reverse temp tower (gets colder as it prints) for PETG low temperature testing