Mr Jönsson and his colleague Mikael Jortby,
who deals with machine tool mechanical
issues, both use ballbar systems daily to test a
large variety of CNC machine tools, including
small VMCs, 5-axis machines and large boring
machines.
Scania chassis parts are made on machines calibrated by
NC Service
Their customers include machine tool
manufacturers such as KMT, a leading
manufacturer of waterjet machine tools and
end users such as SKF (bearings), Scania
(commercial trucks) and LKAB mining.
Peter Jönsson receives a QC20-W kit from Ben Taylor, Assistant Chief Executive of Renishaw, at EMO 2009, Milan
Case study
Peter Jönsson, Managing Director of NC
Service, Gothenburg, Sweden, has used
the Renishaw QC10 ballbar (and Renishaw
laser calibration systems) for years, and is
convinced of the benefits, but is
delighted to take delivery of the new
QC20-W wireless ballbar. As he comments,
“QC10 has been one of our most important
tools, and 100% reliable, since
2004 – we will continue to use it for some
jobs. However, most machines must be
run with the doors shut, and with large test
radii on bridge machines the cable can
become a problem – QC20 makes it much
easier. I’m also looking forward to using
the ‘volumetric analysis’ function.”
IN414
Wireless QC20-W ballbar loses cable
and gains support
LKAB operates one of the worlds largest iron
ore mines within the Arctic Circle and runs its
own machine shop to provide support for its 24/7
operations, critical in such a remote location.
Despite only having QC20-W for a few weeks,
Mr Jönsson explains his initial impressions,
“We have used QC20 on customer machines
for several jobs now and what might seem like a
simple change over QC10, the move to wireless
data transmission, makes a significant difference.
Previously when we set-up a test on a machine
with QC10 we often find problems routing the
cable through the guarding - machines should
always be run with the doors shut. QC20 has
solved another problem we’ve always had with
using QC10 on large bridge machines. In this
case we use the largest diameter test, with a
600mm radius, and with QC10 it was very difficult
to stop the cable tangling.”
The change to QC20-W has been seamless for
NC Service, as Mr Jönsson adds, “QC20 uses
new Ballbar 20 software, which accepts data
captured using both QC20 and QC10, so we can
continue to compare the latest test with historical
data. We have also found that the support from
the Renishaw engineers has been excellent
ever since we first purchased QC10 and the
XL-80 laser calibration system, now in setting up
the new Bluetooth connection and training us in
the new software.”
Mr Jönsson is keen to start using the new
‘volumetric diagnostics’ function, which can
only be used with data gathered with Ballbar 20
software. The user selects 3 test files from the
X-Y, X-Z and Y-Z planes, which are displayed
on a single page. The new analysis finds overall
maximum and minimum circularity values to
give ‘sphericity’ and also shows individual test
circularity results.
NC service supports LKAB mining at one of Europes largest
and most important mines
A typical annual CNC machine testing service
would involve Mr Jortby checking and correcting
for any major mechanical issues, then
Mr Jönsson using the Renishaw XL-80 laser
calibration system to comprehensively map and
compensate for positioning errors, followed by
benchmark tests with QC20-W ballbar in all
3 planes.
www.renishaw.com/calibration
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*H-5650-3133-01
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