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Just purchased this machine, which I though was an Anet A8, The auto leveller does not seem to work on the aluminium heated bed but if I put a piece of aluminium cooking foil under it the sensor lights up. Don’t understand the myriad of confusing advice given on the internet. Neither does my son who is an IT Technician, albeit not in 3D printers. I don’t understand why it would read one but not the other, unless it’s because the bed is covered in the blue tape I stuck on?

Please, please help…I’m desperate to get this running. When we run anything the extruder head tries to bury it’s head into the bed.