Use Geeetech Superplate 3D Printer Aluminum Heatbed Kit with a Geeetech Prusa i 3 Pro B

[the dragonlord]

Good morning everybody, I'm Andrea from Italy, two days ago I've placed the order for the item Geeetech Superplate 3D Printer Aluminum Heatbed Kit ( https://www.geeetech.com/geeetech-super ... -1019.html ) for use it with my Geeetech prusa I3 Pro B because in the item page I've read that it can be used with this printer.

Now I use the original hot bed and I've seen that the temperature sensor is different between the original (1 x 100K ohm Thermistor (Not soldered)) and the new one (NTC-MF52AT wich I see is a 10Kl). I suppose that, due the difference values of the sensors, 100K against 10K, some hardware and/or firmware changes are needed to adapt the control board to the new sensor but I can't find any documentation online about it.

Could you please help me?

Thanks
Andrea

[Ferberto]

Hi Dragonlord.

Same question here, just upgraded the MK2 to the aluminum heatbed and I'm wondering if I've to change some settings in the configuration file (using Marlin).
Datasheet says that the NTC-MF52AT Thermistor has "Resistance value at R25℃ = 80KΩ".
Did u measured 10KΩ at normal temp?

Bye,
Ferb

[William]

You should change this line

10k.png (29.09 KiB) Viewed 9297 times

[Ferberto]

Thanks William.

So is it still correct value "1" (100k +4.7k pullup)?
Same as MK2?

Thanks,
Ferb

[William]

Hi,
You have misunderstood my meaning, I just tell you that you should change this line, the specific value you need to refer to these lines in your firmware

10K--.png (58.11 KiB) Viewed 9253 times