AC hotbed silicone heater from Keenovo on Creality CR-10 series 3d printers

Installation of 750W Keenovo silicone AC heater on a CR-10 3d printer. The heater is fixed on a fine milled casted aluminum plate (5mm thick). In this video I show my alternative relay based safety implementation, however the most secure option remains the use of a thermal fuse screwed to the plate.

Products used:
750W Keenovo silicone heater (choose the right voltage for your country 120/220V): https://s.click.aliexpress.com/e/_Amzp0a

I sourced my plate locally from 7075 aluminum, because that is what I found. Best is to use Mic6 aluminum plate if you are in US. Casted 5083 aluminum plates will also do if you limit the plate power ratio in Klipper/Marlin firmware to 0.7 or 0.8, so it heats up a bit slower. If you are in EU, check this site: https://www.abs-3d.de/druckbetten/cre... (they make 5mm aluminum plates for Creality printers and for some other brands). The keywords are: casted, fine milled, stress relieved.

For the Solid State Relays (SSR) I used overrated 25 A relays (although 10 A is fine also, but the price is very close so take 25 A). Go with quality products like Opto22/Crydom like https://amzn.to/3nuIIKG (240V) or https://amzn.to/3f4SYWK (120V)

High temperature silicone spacers (200 C): https://s.click.aliexpress.com/e/_9Gi31s

If you use thermal fuse choose one for 135C or 150C: https://s.click.aliexpress.com/e/_98DmJo
Note that the best way to mount the thermal fuse on the aluminum plate is to drill/tape a hole in the plate for M3 screw. The fuse should touch the aluminum plate, not the silicone heater. If the silicone heater doesn’t cover all the plate the mounting is easy, else you have to mount it on the edge (5mm).