Adlink PCI-8158 Manuel d'utilisateur télécharger pdf (Page 83)

Operation Theory 73

4.4.1 Original or home signal

Our controller provides one original or home signal for each axis.

This signal is used for defining the zero position of this axis. The

logic of this signal must be set properly before doing home proce-

dure. Please refer to home mode section for details.

4.4.2 End-Limit switch signal

The end-limit switches are usually installed on both ending sides

of one axis. We must install plus EL at the positive position of the

axis and minus EL at the negative position of the axis. These two

signals are for safety reason. If they are installed reversely, the

protection will be invalid. Once the motor’s moving part touches

one of the end-limit signal, the motion controller will stop sending

pulses and output an ERC signal. It can prevent machine crash

when a miss operation is missed.

4.4.3 Slow down switch

The slow down signals are used to force the command pulse to

decelerate to the starting velocity when it is active. This signal is

used to protect a mechanical moving part under high speed move-

ment toward the mechanism’s limit. The SD signal is effective for

both plus and minus directions.

4.4.4 Positioning Start switch

The positioning start switch is used to move a specific position

when it is turned on. The function is shown as below.

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Adlink PCI-8158 Manuel d'utilisateur Page 83