B9Creator B9Creator v1.2, Assembly Manual, Page: 25 / 27

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Detail of sweeper held in place under spring tension. Use the diamond shaped "handle" to easily
hook/unhook the spring ring onto the sweeper hooks (front and back).
Note that sweeper should only be installed when there is resin in the Vat. The resin acts as a lubricant
between the PVC wiper and the PDMS coating on the bottom of the VAT.
NEVER OPERATE THE SLIDING VAT "DRY" (No Resin) WHEN THE SWEEPER IS INSTALLED!
DOING SO MAY DAMAGE THE VAT'S PDMS COATING!
Please note: The Sweeper provides three functions. When the Vat slides during the part release cycle it
clears the resin from the surface of the PDMS allowing atmospheric oxygen to be reabsorbed into the
PDMS. It is the Oxygen in the PDMS which inhibits the resin from curing (sticking) to the bottom of the
VAT. If the PDMS becomes oxygen "starved" during the print cycle it will eventually become damaged.
Second, the sweeper clears the PDMS surface of any particles of cured resin which did not adhere to the
object being printed. This prevents these particles from building up and damaging the PDMS. Finally,
the sweeper stirs the resin helping to keep pigments from settling during long prints.