Data Collection 1
Setup of the XD6 Laser for data collection in the Y axis of a
CMM. The sensor package mounted at the bottom of the Z axis can
record roll, pitch, yaw, horizontal straightness, vertical
straightness, and scale error in one measurement cycle.
Data Collection 2
view of the XD6 setup for data collection. A custom connection
adapter for Renishaw probe heads was made to improve accuracy and
reduce setup time. For non-Renishaw probe heads a standard M8
connection is supported.
Data Collection 3
for data collection in the X axis of this rather large CMM. This
particular machine uses a DEA compensation map so the measurement is
actually for the Y axis data even though the measurement axis is X as
seen by the user.
Data Collection 4
Calibration of a smaller CMM using the XD6 laser. The
instrument transceiver is mounted to the Z axis frame of the machine
in this example. For larger machines the transceiver is mounted
next to the measurement sensor package. For smaller machines the
laser is only used for data collection and all performance tests are
done using the step gauges.
Data Collection 5
Calibration of a CMM involves collecting all compensation parameters
describing the existing machine errors. This image shows the
setup for data collection in the X axis of this CMM. Only one
setup is required to collect all compensation parameters for this
Data Collection 6
One of the two setups for Z axis data collection. The Z axis is
always done using a minimum of two sets of measurements (resulting in
a minimum of four data sets) in a symmetrical configuration.
AutoCapture Utility 1
Snapshot of the Autocapture program during data collection. This
utility records all the measurement data automatically from the XD6
Laser software and stores the results in a modular file. The
goal here is to reduce time required for file handling from foreign
Autocapture Utility 2
Another view of the Autocapture utility showing the live measurement
graph data. When capturing data problems such as hysteresis can
be immediately observed. Measurements are collected using
multiple bidirectional captures of the data in order to find the true
machine error. The live graph data also allows comparison to
existing compensation data.
PMove Utility 1
Capture of an earlier version of the PMove program used to drive the
CMM. This utility makes driving the machine easy and effortless
without the need of a part program. The name PMove
tribute to a similar utility from Tutor for Windows.
PMove Utility 2
Screen capture of the PMove program running on OSX. This program
can drive certain controllers directly provided the controller handles
all the compensation error map data. The alignment function
allows easy switching between normal and rotated axis systems.
10360 Diagonal 1
A part of the volumetric performance testing either the laser, step
gauge, or any combination of the two can be used to verify machine
performance. This setup is for a combination laser and gauge
block measurement of one of the diagonal measurements.
10360 Diagonal 2
This is another image of the laser and SMR. Switching between
positions is very fast once setup on the base plate. An optical
SMR probe is used in place of the XD6 sensor package as only linear
accuracy tests are required by the 10360 standard.
10360 Diagonal 3
An image showing an actual volumetric performance measurement setup of
a CMM. The measurement length is from corner to corner rounded
down to the nearest 100 mm increment. The laser is not normally
visible but drawn to show the relative positions of the laser and
SMR. This setup is also used to collect data for XY, YZ, and ZX
squareness errors prior to running the performance test and is
noticeably more stable than updating squareness using a ball bar.
Correction Processor 1
The map2map correction utility is a necessary tool to make use of the
simultaneous measurement of all compensation map parameters.
Without this software it is necessary to build the map in stages and
double all data collection efforts.
Step Gauge 1
Measurement setup for Z axis using a step gauge. The step gauges
are used for performance testing (and possible squareness updates if
the machine is small enough). One step gauge measurement must be
done for every machine as a redundancy check of the laser even if the
result is an extra measurement position beyond what is required by the
Step Gauge 2
Another view of the step gauges used for performance testing. A
typical calibration for a medium sized machine will involve the XD6
Laser for data collection and hard gauges for performance
testing. Using multiple gauges adds measurement confidence.
Performance Testing 1
Testing the machine volumetric performance for position 2. The
laser is not normally visible but drawn in so that it is not missed
relative to this rather large CMM. The diagonal test positions
are from corner to corner broken down into five measurement lengths.
Performance Testing 2
The measurement of the step gauge inside the volume of this smaller
machine pushes it to the measurement limits. This image shows an
E150 offset probe measurement in the YZ plane of the CMM.
Performance Testing 3
This image shows an E150 offset probe measurement in the ZX plane of
All compensation parameters from CMM compensation table are related in
one way or another. When reviewing data finding correlations
between the different sets of measurements is another method to ensure
integrity in the collected data. In this example the real
straightness of an axis is compared to the expected straightness
extrapolated from the corresponding angular data.