UNIMO Technology UDR-204 Manual de Instruções descarregar pdf (Página 345)

Calibration, Maintenance, Troubleshooting and Warranty

Adjustment Screw Maintenance Procedure

Rev. B MultiMode SPM Instruction Manual 325

Adjustment screws are threaded into brass inserts, which are afﬁxed to the scanner body with

epoxy. Although screws are not heavily lubricated, a light ﬁlm of oil is applied to them at the

factory to prevent galling. This allows sufﬁcient lubrication for ﬁne adjustment, while minimizing

drift (i.e., loosening) between the screws and scanner body due to the slow displacement of

lubricant from screw threads.

Problems develop whenever screws become fouled with ﬁne grit: screws may be difﬁcult to turn

and/or exhibit any of the following symptoms:

• Eccentric, rotational “limp” (i.e., alternatively easy, then difﬁcult to turn).

•Faint, crunching or grinding noises when rotated.

• Microscope cannot engage sample surface, i.e., motor is unable to rotate rear adjustment

screw.

If any of these conditions are noted, screws should be backed out and cleaned as described below.

Note: If screws are frozen (i.e., cannot be rotated), DO NOT attempt to force them!

Return the scanner body and screws to Veeco for repair.

The user should inspect screws at least every three months, more often if possible. It is a good

practice to check screws whenever the scanner body is removed by turning manually and feeling for

resistance. This is especially true of the rear, motor-actuated screw, which may be fouled without

the user’s notice.

Ball Bearing

Setscrew (applies

Plastic bushing

Brass threaded insert

Knob

Screw

(Scanner body)

Screw hole (on 3-screw models)

pressure to bushing)

(top)

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UNIMO Technology UDR-204 Manual de Instruções Página 345