Interface switch descriptions

HCU2 operation

When the system is used in conjunction with an HCU2 hand control unit, the probe damp and probe reset buttons on the HCU2 are active.

The probe reset button will pulse the PPOFF PICS line when pressed, but only while the system is in manual mode. The probe damp button will toggle the PDAMP PICS line when pressed, but only while the system is in manual mode. Both the probe reset and probe damp buttons on the HCU2 can be made inactive by use of a switch on the rear panel of the PHC10-3.

Switch	Description	Position
8	Operation of HCU2 probe damping and probe reset	UP	Enabled
8	Operation of HCU2 probe damping and probe reset	DOWN	Disabled

Probe reseat time

The extended probe reseat timer on the PHC10-3 PLUS unit is designed to be used where the touch probe fails to fully seat within the standard reseat period following a head index move (e.g, when using long extension bars).

Switch	Description	Position
10	Time permitted for probe to reseat following a head index	UP	Extended
10	Time permitted for probe to reseat following a head index	DOWN	Standard

Interface connection

Switch	Description	Position
11	Probe connection	UP	PICS or 7-pin DIN operation: the PHC10-3 PLUS internal inhibit relay disables the interface during a head index
11	Probe connection	DOWN	5-pin DIN operation only: the PHC10-3 internal inhibit relay disables the probe during a head index

Output configuration

The PHC10-3 PLUS can be connected to a probe interface via the PICS connection or via the raw probe connection (7-pin DIN connector).

Switch	Description	Position
12	Probe output configuration	UP	PICS
12	Probe output configuration	DOWN	DIN

Probe wire isolation

The probe wires need to be isolated from the machine cable wiring when used with multiwire systems. This is controled by switch 13.

Switch	Description	Position
13	For use with machine cable	UP	Machine cable
13	Multiwire option for use with PL172	DOWN	Multiwire

PICS STOP assertion

The PHC10-3 PLUS will assert STOP under the following conditions:

Condition	Notes
Overload error	Head has been overloaded when locked causing it to unlock.
Obstruct error	Head has been obstructed when moving to requested position.
Datum error	Head is unable to lock into the requested position.
Head disconnect	STOP will be asserted for two seconds if head is disconnected.
Power failure	Stop signal will be permanently asserted if mains power is removed from PHC10-3 PLUS.
USB cable disconnected	PICS STOP will be asserted if USB cable is used and removed during operation.

The reaction to assertion of PICS STOP to the system and effect of the signal removal are detailed below:

System state	Reaction	Removal of external STOP
STOP asserted on power up - head locked.	Normal system start up - head will report its position.	Head movement commands accepted.
System in manual mode - manual movement initiated by HCU2 after STOP asserted.	Single step manual movement only - continuous movement is disabled but head can be moved slowly as a safeguard movement. Head will lock up as normal when movement key is released.	Continuous movement enabled.
System in manual mode - STOP asserted during manual move by HCU2.	Continuous head movement is immediately disabled - head will continue to move in single steps. Head will lock up as normal when movement key is released.	Continuous movement enabled.
System in automatic mode - stop asserted before update command received.	PHC10-3 PLUS will not unlock or index the head.	Normal system operation resumed.
System in automatic mode - stop asserted during a head move.	Power immediately removed from axis motors - motors braked.	Update command will cause the head to complete its move.

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