Yaskawa SGDH Linear Sigma Series Bedienungsanleitung PDF herunterladen (Seite 252)

9 Operation

9.2.2 Setup Procedure Using Linear Servomotors with Hall Sensors

9-8

(4) Setting the Linear Scale Pitch (Grating)

Turn ON the control power supply.

When the power is supplied normally, the panel operator on the front panel of the SERVOPACK will show the

following display. A linear scale pitch setting error (A.08) will be displayed, but does not indicate an error. Set

the scale pitch (Pn280) according to the scale being used. After setting validation of the control power, the A.08

alarm will be cleared, and the settings will be enabled.

If an alarm other than A.08 is displayed, as shown in the following diagram, the power supply circuit, linear ser-

vomotor main circuit cable or encoder cable wiring is the probable cause. Shut down the power supply, specify

the location causing the alarm, and take corrective measures so that the display returns to the above normal sta-

tus. For details on alarms, refer to 11.1 Troubleshooting.

Normal status

Example of alarm display

Pn280 Linear Scale Pitch

Setting Range Setting Unit Factory Setting Setting Validation

0 to 65535 1 μm0 μm After restart

If the linear scale pitch (Pn280) is not set correctly, the linear servomotor cannot be controlled. Make sure that the correct

value is set before operating the linear servomotor.

When using a SERVOPACK right after factory shipment, the alarm A.08 (Linear Scale Pitch Setting Error) will be dis-

played but does not indicate an error. This alarm is generated to remind the user to set Pn280. After setting the correct value

and setting validation, the alarm A.08 is cleared.

Control is performed the SERVOPACK using 1/256 the distance of the scale pitch as a minimum feedback pulse. The count

is performed in the serial converter unit using 1/256 of the linear scale pitch.

Make sure that the scale pitch satisfies the following conditions.

Speed

Position

Force

64000

Scale pitch (μm)

Value of = Integer

Examples

Corrent: 1, 2, 4, 8, 10 ,16, 40

Incorrect: 3, 12, 18

Linear scale pitch

Linear scale pitch (Pn280) =

Distance of one cycle of the analog voltage feedback signal.

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Yaskawa SGDH Linear Sigma Series Bedienungsanleitung Seite 252