1-2
ACHIEVABLE SET-UP TOLERANCES
The tolerances to which tools can be set depend
upon the flatness and parallelism of the stylus tip
setting. A value of 5 µm (0.0002 in) front to back
and side to side is easily achievable over the flat
portion of the stylus tip, and 5 µm (0.0002 in)
parallelism is easily achievable with the axes of a
square tip stylus. This setting accuracy is sufficient
for the majority of tool setting applications.
RECOMMENDED ROTATING TOOL FEED RATES
Cutters should be rotated in reverse to the cutting
direction.
First touch – machine spindle rev/min
Rev/min for the first move against the probe stylus
is calculated from a surface cutting speed of
60 m/min (197 ft/min).
Spindle speed should be maintained within the
range 150 rev/min to 800 rev/min and relates to
cutters of Ø24 mm to Ø127 mm (Ø0.95 in to
Ø5.0 in).
Surface cutting speed is not maintained if cutters
smaller than Ø24 mm (Ø0.95) or larger than
Ø127 mm (Ø5.0 in) are used.
OPERATION
First touch – machine feed rate
The feedrate (f) is calculated as follows:
f = 0.16 × rev/min
f = 0.12 × rev/min
Second touch – machine feed rate
800 rev/min, 4 mm/min (0.16 in/min) feedrate.
SOFTWARE ROUTINES
Software routines for tool setting are available from
Renishaw for various machine controllers and are
described in data sheet H-2000-2289.
f units mm/min (diameter set)
f units mm/min (length set)