The Anet A8 is a cheap 3D printer very commom on the DIY community that when you put some time working and upgrading will put very good quality prints.
The Anet A8 was the reputation of being a fire hazard do to some faulty parts, one of those parts is the connector to the hotbed.
With this fix the 3D print will became more safe to use by reducing the risk of fire and prevent a failed print.
Step 1: Burned Connector
This connector is a VHR-6N wire to board with four wires , two for the 12v supply and the two other are for the thermistor that read the hotbed temperature.
This connector can draw 10 amps in normal operation.
You can see on the hotbed the layout of the wires in the connector:
The terminal inside will became loose with time do to the vibration produce by the 3D printer, the terminal will became isolated do to the small spark and the hotbed will stop working do to the lack of 12v power supply.
Step 2: Wire Directly
The first thing to do will be desoldering the hotbed connector and solder the wires directly to the hotbed like i did.
This will eliminate the use of the VHR-6N connector.
Take your time desoldering, this will be a little bit tricked because the aluminium in the hotbed will draw all the heat of the soldering iron.
Step 3: Final Step
To ensure that the wires stay in place and isolated from each other you can apply high temperature silicone.
The silicone can withstand high temperature up to 300ºC, more than enough for the working temperature of the hotbed.
Now you can work with your 3D printer again in a more improve and safe way.
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