Renishaw SP25M Bedienungsanleitung Seite 132

SP25M user's guide
http://www.renishaw.com
CAUTION: RTP20 must be locked in the A, 0 and B, 0 position before initially defining the pivot pole sphere.
Prior to initial use, RTP20 is locked in the A, 0 and B, 0 position to enable the OEM supplied software to define the pivot pole sphere
location at eight default positions for RTP20. This is done by calibrating four angles in the A-axis and four angles in the B-axis. Whilst a
small degree of misalignment can be accommodated by head/cup geometry, this should be minimised where possible and the first moves
should be carried out slowly to confirm clearances.
Using RTP20
To change the orientation of RTP20:
1. Use the OEM supplied RTP20 software 'macro' to send the head to a safety 'stand­off' position that offers a clear path to the pivot pole
sphere.
2. From this 'stand­off' position, send RTP20 to the sphere using the CMM axes to locate and rotate the appropriate left or righthand
locking lever of the head to unlock it. The head is then repositioned to engage the RTP20 cup on the pivot pole sphere to index it to the
required angle. Once the required angle is reached, the cup is disengaged from the pole sphere and the head is moved to locate and
rotate the appropriate locking lever to the re-locked condition.
3. RTP20 is then returned to a safety 'stand­off' position clear of the pivot pole.
4. Commence gauging, ensuring that the correct qualification data is recalled for each head position.
To define RTP20 probe head positions:
Use the OEM supplied RTP20 software 'macro' to change the orientation of the probe to the next desired position and qualify the stylus
tip(s)
Qualify the stylus tip(s) according to the CMM supplier's instructions
Repeat the qualification process for all other desired orientations and stylus tips
Periodic re-qualification should be performed under the following circumstances:
CMM supplier's recommendations, particularly in respect of temperature changes
At the start of the working day or shift
After an accidental collision
After changing any measuring system component (except a prequalified TP20 module)
If the initial state is unknown or uncertain
Issued 10 2015
132