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Once the scanner is tuned

up,

there is a procedure in section 6.1.9 that explains how to match the

responses of

two

servo axis channels. For best X-Y scanner performance for most applications,

the responses of both channels should

matched.

6.1.3.

Required Tools and Materials

Dual tiace oscilloscope.

Function generator - needs to have a sine and square wave output.

Digital voltmeter

Hand tools -jeweler's screwdriver flat-tip

Clip lead with "micrograbber" ends.

6.1.4. Initial setup

Ensure the power is tumed off prior to performing the following steps.

Refer to the startup procedure in section

4.2.

above. Follow steps

-7.

To find the location of

the

test points and the tuning potentiometers or '^mpots", refer to

the Outiine Drawing,

D03457,

located in section 6.2.

6.1.4.1.

Board Silkscreen Potentiometer Identification

The tuning, scale adjustment, position offset, and linearity potentiometers are indicated with a

silkscreen aligned under the respective potentiometer on the bottom of the 670 board. The

identification is as follows (left to

right

on underside of

board):

Silkscreen

, PS

LIN

SRL

LFD

HFD

Ref

Des

R13

R77

R78

R51

R31

R25

R28

R59

R107

Description of Potentiometer Function

Position Scale adjustinent

Lineanty adjustinent

Slew

Rate

Limiter adjustment

Input Scale adjustinent

Position Offset adjustment

Error Integrator coefficient adjustment

Low Frequency Damping coefficient adjustment. Also

referred to as "Position Differentiator".

Servo Gain coefficient adjustment Also referred to as

"Ertor Amplifier".

High Frequency Damping coefficient adjustment. Also

referted to as "Current Integrator".

Band Width adjustment tor

HFD

and

LFD

alignment

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 67 68

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