Good morning or good afternoon or good evening to everybody and thank you very much for joining
today's webinar my name is Richard smith and I'm global applications manager at Taylor Hobson
in this webinar we will take a look at Taylor hobson's automatic ls arc auto analysis for
spherical bearings in the top right of the screen we can see an example of a single
bearing raceway and double bearing raceway and a situation where we have four arcs to analyze
in each of these cases it's far better if we are able to precisely
and automatically define the exact regions on the raceway that we want to analyze
this is often done in relation to the shoulders on the raceway profile
so using ls arc auto analysis to do this saves time and reduces the operator error
we're going to start then with an overview and demonstration of ls arc auto analysis
ls arc auto analysis is part of metrology 4.0 software
it provides automatic analysis of spherical bearings
by auto detecting single or multiple arcs and shoulders
it auto levels on the shoulders and can also auto level on stepped
shoulders on stepped reference surfaces
ls arc auto analysis automatically extracts the precise region required it can do this
in different ways firstly it can do it by defining the region for analysis in dimensions
from the lowest point or from the highest point that is from the turning point
or it can do it by looking at the slope position on the curvature of the profile
or it can do it as a percentage distance from the center
in these last two cases using slope or percentage provides easy automatic analysis for
a range of bearing sizes without the need to type in different dimensions each time
this can save a lot of time
now for a quick demonstration of ls arc auto analysis on a single bearing raceway
so now we start the measurement in metrology 4.0 software
and the first thing that we do is to select the single bearing
the measurement takes place and just for this illustration I've stopped the
dialog box there on the screen normally this is automatic but I've just shown what's
happening there and for this particular bearing we're going to enter a particular
region that we want to analyze
so we're entering two millimeters either side of the center we press ok and there is the final
result in the contour analysis software we can see the primary profile we can see the radius
and we can see the roughness we can also see those two points either side of the center
as well as this the software has leveled the profile on these shoulders as well
again in metrology 4.0 software
we'll look at a double bearing now but this has double partial arcs
so in the same way we start by selecting the bearing that
we're looking at in this case it's a dual bearing raceway
and the measurement takes place
we can see that this profile is quite tilted
and if we look on the profile we can see the shoulders on which we want to do the
leveling and we can see the partial arcs on the left and the partial arc here on the right
again we proceed with the analysis where we can see the residual profiles for arc 1 and r2 so
this time we're analyzing two arcs in this same software here again is the full result in contour
software we can see the primary profiles at each end we can see the radius of each of the arcs as
well as associated roughness values on the on the arcs and we've leveled the profile on the on these
shoulders
so let's have a look now at some of the options and settings in ls arc auto analysis
once we have the profile we can open the dialog box and here it is and we can see the profile
there that we've measured and it's automatically leveled it on the regions marked in pink and on
the central section in violet that defines the region that is available for analysis as an arc
and we've just chosen a very small section of that to analyze between these two blue dots between the
left fitting limit here and the right fitting limit here once that's complete we will see
the associated residual profile for that region that we've just analyzed
another example here that we just looked at for the dual partial arc
profiles again in the dialog box we have leveled on these two shoulders
these two regions have automatically been found as defined as being an arc and we've chosen here
the region for arc 1 that we want to analyze and we've chosen this region here a different
set of settings for arc 2. below it here we're showing the residual profile for just arc 1.
so now let's have a look at further capabilities using multiple arcs
we've already had a look at a single arc analysis and at dual partial arcs
we are also able to measure stepped arcs as you can see here we have the shoulders at a different
height and if the profile is significantly tilted we'll have a look at how this is leveled
automatically and also we'll have a look at analyzing up to four arcs
so let's start with the single arc just to recap and what we're doing here now
is bringing up the dialog box for the ls arc auto analysis
as before and on the screen there you can see the two areas on which we've done the leveling
we can choose to select both of them or either of them or none of them
that is the arc region there that's the region defined as an arc and the two dots there are
plus and minus one millimeter from the center one millimeter now is changing it to two millimeters
from the center and you can see that those dots move out to minus two and plus two millimeters
and the result there is for arc one that's the residual profile between those two blue dots
we also have the ability to define a different arc analysis region from the region over which
we've done the form fit and in this case the arc analysis region I'm setting here for
three millimeters and you can see two other dots there which define the region over which
the analysis takes place but the form fit is taking place between those two blue dots
between plus and minus two
and the result there again is shown just for that arc
once we click ok we can see the profile has been leveled
that's the leveled profile there leveled on those shoulders and that's the residual profile
looking now at a stepped double profile
again we bring up this dialog box this is just how we would set it up and we can choose which
regions we want to use for the for the leveling clearly that's still tilted so we choose the
step function over there in the right and we're choosing the those two pink regions shown for the
leveling at different heights but it still levels the profile there it is the profile
is leveled that's the level profile now you can see and we have two results one for each arc
and if we just go back up again we can see that we have leveled on between there and there
let's have a look now at a profile with significant tilt in this case four
degrees
again we bring up the dialog box
and you can see automatically without doing anything the
regions for leveling have been detected
and we've leveled that profile you can see it's leveled on that on those edges and there again
is the residual profile if we look in the dialog box again if we change the detect lines angled
less than dialog to 3 degrees then clearly that is outside the 4 degree 4 degrees is greater
than that so what's happened here is that it's actually not leveled not level the the profile
let's have a look now again very quickly at those dual partial arcs
one on the left on the one on the right here is the analysis taking place
and we've leveled on those two shoulders we've ignored the other flat regions in there
and we're looking at arc 1 residual arc 2 residual and both residual profiles there together
and so even though that profile has some tilt it's now been leveled on those two
shoulders these two shoulders and we can see the both of the residual profiles coming out
finally let's have a look at the analysis measurement and analysis of four arcs
and here's the dialog box again which has automatically detected the shoulder regions we
can select or deselect the ones we want and we're showing arc one as a residual we're now choosing
let's choose another one we can see the residual now for arc three that's there and arc4 and then
all of the all of the profiles together so this is showing the residual profile now for
all of the residual profiles being compared so clearly a very powerful way of analyzing arcs
and once we press ok on that dialog box all of those you can see it's
leveled the profiles and then all of the individual results come through
let's take a look at the contour analysis that's been done on that partial dual partial arc
as I mentioned earlier we can see the form error the roughness and we can see the the
primary profile and the green dots there defining the analysis regions and the form fitting regions
in each case let's look at a little bit more detail at that now so we're going to look at this
right hand side where that green box is and we're just going to zoom in on there and have a look
so there it is again this is that area defined by the large green box and what we're showing here is
the left fitting limit is here and the right fitting limit is over here the left analysis
limit is here and the right analysis limit is here what I want to show here is that
the dialog box and the display you see in contour are interactive so as we change the the numbers
you can see I've changed the number here to two millimeters and to 1.75 millimeters and you'll see
these the position of these two now change and you can see those have now now moved in the contour
analysis and there it is in contour analysis with the modified positions of those those arcs
the positions of those limits can be set
automatically from the right from the start of the measurement program they could even be part of a
barcode read on a on a profile on a part so let's have a summary now of what we've seen seen today
we've had a look at automatic analysis of spherical bearings
we've seen how we can auto detect single or multiple arcs and shoulders we've seen how we can
auto level on shoulders and on stepped reference surfaces we've seen how least squares arc auto
analysis can automatically extract the precise region required with reference to the center
of the arc and this can be defined by dimensions in millimeters from this center from the turning
point or by the slope or position on curvature or by the percentage difference from the center and
as we mentioned at the beginning in these two cases using the slope position or the
percentage distance provides easy automatic analysis for a range of bearing sizes without
the need to constantly enter data information so that brings me to the
end of the webinar it's an opportunity now to take to have a look at some of the questions
so we don't have any questions today but I'd just like to say thank you again
and look forward to meeting you at the next webinar that we have
thank you and goodbye