In this test we are going to study how the system behaves when removing all insulators such as many reprap machines.
The goal here is to show if the insulation has a real impact on the heat bed performances.
From top to bottom:
- Aluminum sheet
- 2 heating plates
- Wood plate
- Heat beds: 2
- Bed 1: MK1a (with the thermistor) powered by PSU N°1 (360W)
- Bed 2: MK2B powered by PSU N°2 (300W)
- Initial Temperature: 21°C
- Target Temperature: 110°C
- Print Surface: 1x 3mm aluminum plate (435x320mm)
- Insulator: none
The red curve is the heating profile, when we apply the 110°C target.
The blue curve is the cooling profile, when the target temperature is set to 0°C.Here the power supplies are OFF.
At the bottom of each graph you have the time in seconds
On the left of the graphs you have the temperature in °C
While heating we have:
- 60°C in 5 min 07 (307 sec)
- 94°C in 30 min 45s (1845 sec)
The whole system can barely reach 94°C max!
And we must wait 6 min 10 sec (370 sec) to cool down from 94°C to 60°C
Comparison with previous test:
Compared with test 7 the differences are very different:
- the max temperature we can reach is 94°C! so 6°C less for a total duration of 30 minutes max
- The heating time increases by 23% to reach 60°C
- The heating time increases by 47% to reach 94°C MAX!
- This test shows how important the insulation is for a heatbed. Insulation allows to get extra 6°C on max temperature for the same heating period.
- Also, as we could have guessed, we have a performance decrase by 23% to 47% related to the lack of insulation below the heat element.