GE ArcamEBM Spectra H, Operation Manual

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5
Safety
5 5..8 8 V Va accu uu um m H Hyyg giie en ne e
5 5..8 8..1 1 H Ha an nd dlliin ng g V Va accu uu um m C Ch ha am mb be err P Pa arrttss
C Ca au uttiio on n
The vacuum chamber and column is highly sensitive to all kinds of contaminations. Always use
powder free latex gloves or similar when handling parts exposed to vacuum.
Temperature resistant grease have to be used. Vacuum grease, Vac1, is provided with the ma-
chine. Always change gloves after using/applying vacuum grease.
All parts that are exposed to vacuum in the chamber are to be kept free from fingerprints, hair, moisture, oil
and other impurities. Non-compliance can lead to losses in efficiency and prolonged pumping times. The
risk for arc trips and interrupted builds is also increased. Always use gloves when working inside the cham-
ber or with chamber parts and keep the vacuum chamber parts free from metallisation.
D DO O N NO OT T
• Reuse dirty heat shields, cones, foils or glass. Don't reuse any dirty or metallised consumables.
• Use dirty tools.
• Place chamber parts on dirty surfaces.
Avoid keeping the vacuum chamber door open for longer periods than 4 45 5 m miin n. Control the humidity in the
machine environment to avoid oxygen pick-up in the powder. Long term oxygen pick-up in the powder
might lead to material specification deviations. The oxygen pick-up in the powder, on the chamber walls
and chamber parts makes it easier for smoke to occur, since oxygen in the chamber migrates to the powder
during the build process. Humidity also prolongs pumping times and increases risk for arc trips.
In order to promote reliability and efficient operation, the Arcam EBM® system requires a certain amount of
scheduled preventive maintenance both from the user and the Arcam Field Service Engineers (FSE).
32 02 OM-710430 en-GB