Voron Headbed

My LDO Voron 2.4 350 Rev D started smelling very bad after approx 200h of printing over the last year. Please don't come with comments like "usual ABS SMELL". It is definitely not the ABS! This smell is really horrible and spreads arround in the complete house.

The reason seems to be using the heatbed at 120deg for drying silika for a long time-period (> 8h).

Now I want to replace the heatplate of the bed, which smells like that bad taste.

Fabreeko offers heatbeds with suitable adhesive, or probably even without. But they are currently out of stock and I dont know how to order from Germany (probably quite expensive, when including shipping and taxes)

The idea raised up, to use heatresistors as replacement for the silicon mate.

30 times 100 Ohm resistors (50 W) were skrewed to the aluminum plate into 60 M3 threads drilled into the back of the plate. This should be much more than enough to heat with approx 600 Watt. The resistors were connected 5 in series 6 times in parallel makes (500/6 Ohm = 83 Ohm). P=U²/R=230^2/83 Watt=640 Watt.

HY510 was used as conductive paste, which seems to be a good compromise between quality and price. This conductive paste can be used in a temperature range, which is far outside the usual use-cases for a 3D printer. The 5 series resistors very soldered directly together, the endconnection was done via silconcables and wago-clamps

Before starting the build, I estimated, the temperature fluctuation due to the distance of the load-resistors: Voron_TempFluct