Unloading a probe arm

Recall the pin datum XD, YD, ZD set in step 8 of the port datum procedure in the 'Port datum procedure' section
Ensure the PHS-2 has a probe arm fitted
Ensure the PHS-2 is oriented into the correct position to enter the port (D 0°, E 90°)

Position relative to pin datum XD, YD, ZD:

X-axis	Y-axis	Z-axis	Point	Description
+53.5	-135.5	-31.5	F	Stand off position. Head is in front of port and has probe arm fitted. Head is orientated to D 0°, E 90°.
	-114			Transit stage. PHS-2 contacts the ACR2 port lid. This may cause a probe trigger so the probing system should be disabled before reaching this point.
	-20			Transit stage. Probe arm engages port location pins. Renishaw recommend that servo control of the head axes should be switched off at this point. NOTE: Remove only 24 V servo power from the head. Do not remove logic power as this will cause head position loss.
+53.5	+14.5	-31.5	E	PHS-2 fully located in ACR2 port.
+50	+14.5	-35.5	D	ACR2 ready to activate unlock mechanism.
+50	+14.5	+68.5	C	Probe arm unlocked from PHS-2 head.
+74	+14.5	+68.5	B	Move PHS-2 head clear of probe arm.
	-20			Transit stage. Servo control of the head should be re-enabled. NOTE: The position of the head may have changed under gravity and that the head should be help in its current position before returning to the previous orientation.
	-114			Transit stage. PHS-2 clears the ACR2 port lid.
+74	-135.5	+68.5	A	Stand off position. Head is in front of port with no probe arm fitted.

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