Omtech SH-F50 User Manual page 18

Precious Metals: Gold and similarly soft metals should be engraved with less power but a moderate speed. Silver and
other semidurable metals are best engraved at a slightly higher power and slightly slower speed, but still not at the
same power and speed as steel or aluminum.
Plastics
When engraving plastics, generally use low power and high speed settings. Marking and engraving with too much
power or at too low a speed can concentrate too much energy at the point of contact, causing the plastic to melt. Among
other problems, this may produce poor engraving quality, noxious fumes, and even fires.
Stone
When engraving various kinds of stone, generally use moderate power and speed at low frequency. As with ceramics
and metals, be mindful of the dust created (especially for repetitive industrial applications) and take similar measures
to ensure the safety of users and others in the work area.
5. Maintenance
5.1 Maintenance Overview
Unless otherwise specified, ONLY perform adjustment and maintenance of this device when the power is
turned off and the power supply has been disconnected. ONLY allow trained and skilled professionals to
modify or disassemble this device.
5.2 Regular Maintence Procedures
• Keep the workroom clean and dust-free at all times.
• Ensure the device is fully powered off when not in use.
• Cover the galvanometric lens when it is not in use.
• Clean the worktable after use with a cloth wetted with greater than 75% rubbing alcohol. NEVER clean this device
with abrasive or caustic cleansers, with aerosol sprays, or with enough water to enter any electrical component.
Always allow surfaces to fully dry before further use.
• If removing dust from the device's vents using a vacuum, ONLY use the lowest power setting to avoid damage to
internal components.
No other servicing should be done by the operator. Do not attempt to service or replace other parts yourself.
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