Axis 670 Manual de Instruções descarregar pdf (Página 26)

6.0. Appendices

6.1.

Tnne-up procedure

6.1.1.

Precautions

Read the following procedure completely before attempting to retune the system. Serious

damage to the scanner could result if the servo were improperly adjusted!

**Caution!! Shut the system down immediately if a resonance occurs. A resonating scanner

will make a load noise that sounds like a buzzer or possibly like a high

frequency

whine. Do not

confuse this with the normal sound the scanner makes while operating. If this occurs while

tuning up the system, shut it down immediately. Check to make sure the mirror load is correct

for the scanner and is firmly attached. If

so,

start the tuning procedure over again. This is the

only way to ensure the scanner isn't damaged. Contact Cambridge Technology if a resonance

condition cannot be resolved.

6.1.2 Overview

For most users, the factory settings on the 670 board will never need adjusting. However, if the

user wants to change the mirror load originally used, the system will probably have to be

retimed. This procedure is aimed at the user who has an electionics background dealing with

servo contiolled

systems.

Do not attempt this procedure if any part of it is not clearly understood.

This procedure explains all of the adjustments that are performed at Cambridge Technology.

These include the Notch Filter, Position Output Scale Factor, the AGC Linearity, the Command

Input Offset, the Command Input Scale Factor, Closing the Servo Loop, and the Slew Rate

Limiter.

The following procedure can be used to tune-up the system completely, or

just "touch up" or

verify any one of the adjustments. If the tuning adjustments are to be just verified and/or

touched up, do not initialize the tuning pots as it states for a complete tune-up. Otherwise the

customer will be forced to perform unnecessary steps, which could possibly reduce the

performance of the system, depending on the experience of the adjuster. Call Cambridge

Technology if any parts of this procedure are not completely understood.

**Caution!! Failure to carefully monitor the scanner's position response while adjusting the

servo trimpots could result in an uncontiolled resonance which could damage the scanner.

6.1.2.1 The order in which the adjustments should be made are:

1) Notch Filter Frequency adjustment (sec 6.2)

2) Command Input and Position Output Scale Factors, Linearity (sec. 6.1.5,6.1.6)

3) Closing the Servo Loop (sec 6.1.7)

4) Slew Rate Limiter adjustment (sec 6.1.7.13)

5) Matching X and Y Servo Channels (sec 6.1.9)

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