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Revision to Warnings

Harald Wagener (oliof)

* '''When mounting the Duet, if you use metal screws then make sure that they don't touch any of the electronic components or solder pads on the Duet!''' Use the Nylon washers supplied with your Duet under the screw heads.
* '''Be very careful if you use a multimeter to measure voltages on the board, especially on the fan connectors!''' The probes may slip and short against each other or to other components. If you short the two pins of a fan connector together, you '''will''' damage your Duet.
* '''Do not rely solely on the Duet electronics and firmware to guard against excessive temperatures in your 3D printer!''' Despite the advanced protection features in Duet firmware, electronics and firmware can fail in unexpected ways. Read the Fire Safety[[FireSafety|Fire Safety]] page.
* '''Do not rely solely on the Duet electronics and firmware to guard against excessive temperatures in your 3D printer!''' Despite the advanced protection features in Duet firmware, electronics and firmware can fail in unexpected ways. Read the Fire Safety[[FireSafety|Fire Safety]] page.
* '''If you use a USB connection to the Duet, take care to mitigate the effect of ground loops!''' See [[USB ground loops]].

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