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Adam Savage's Favorite Tools: Wiggler Machining Center-Finder - YouTube
Channel: Adam Savage鈥檚 Tested
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Adam Savage here in my shop with a tool
tip for you.
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And I'll be honest,
I try and keep my tool tips to super
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affordable tools that everyone should
have. I
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like doing that for the bulk of my tool
tips but this one involves
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a really esoteric tool that is kind of
spendy but
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there's not many other things that does
exactly what it does as well as it does.
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And I wanted to introduce you to it
because
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it's useful to know what is out there so
for today's tool tip I've got a piece
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of ...
Hold on let's get some perspective on
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this.
All right so I ...
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So for today's tool tip Ihave
a piece chucked in uh on top of the vise
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of my milling machine and i want to do
some milling operations
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but because this is just clamped onto
the top of my vise uh i need some
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indication of exactly where it is and i
could do a
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a edge finder like this and this but
instead i'm going to do all my machining
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operations off of
the concentricity of this hole so what i
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need to be able to do
is line up the quill of my mill
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with this hole exactly and there is a
tool that does that there are lots of
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inexact ways you could do this and i
have done many of them over the years
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and i'm here to tell you
where precision is concerned the
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inexactitude can lead to
lots of long tail unintended
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consequences
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maggie hears somebody peggy what are you
complaining about i'm just talking to
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the camera
okay so we're going to see what tool
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gets perfect concentricity between your
quill
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and a hole on the mill the tool we're
going to use
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is colloquially known as a wiggler
i'm not sure totally honestly not sure
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of the exact official name
of this tool but it is a measuring
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instrument
here's what it looks like and
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it wiggles so when it wiggles
it shows a certain amount of movement on
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the dial and we're going to use that
movement
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to precisely calibrate the concentricity
of the quill of the mill
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to the hole and ah first things first
you make your job a lot easier using a
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wiggler if you get
close to start so i've chucked in a end
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mill into one of my uh
into one of my collets and i'm just
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gonna
roughly set it here i'm gonna bring it
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down to the hole
and i'm going to just get
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within a few thou of center right like
by eye i mean this is the thing about
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close enough
is that you can get within probably
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10 or 15 thou 10 or 15 thousands that's
like five five or six sheets of paper
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uh in terms of precision but that
like that way lies madness you don't
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want to try that but you can get close
and get with intent now
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uh so i'm pretty pleased with where that
is i'm going to pull it back out
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and now it's time to activate the
wiggler
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um so i'm going to lower this down a
little bit
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oh hey um
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i forgot i'm shooting videos i should
actually give you a
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close-up bit of b-roll centered
here we go
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yeah okay i know on camera that doesn't
look
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incredibly perfectly centered but to be
honest
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it is pretty close yeah that's not bad
okay
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i think that's within yeah i think
that's within a few
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thousand just mark my dro so i'm close
okay great
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so i will remove that collet and the end
mill
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we're going to break out a collet that
fits
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the spindle of my wiggler
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thank you by the way thank you to
everyone in the comments who was telling
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me the official name of this tool and
what it is called
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jamie had one years ago that he picked
up when the old
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uh chris whales shop shut down
and um
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i think i had to ask chris ran what the
hell this thing was called
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and he guided me towards where i could
find one
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but i don't quite remember okay so the
wiggler
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is in place uh you know what i want to
lower this
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let me get a close-up on this so
here's how the wiggler works when you're
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about to activate the wiggler you need
to choose
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a uh a probe that uh
is appropriate for the size of hole that
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you're going to you can use
really big probes like this for holes i
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don't know what the maximum of this but
when i look at this i'd say
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that could measure the out the inside of
a hole that's
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at least seven or eight inches in
diameter
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this little hole i have here is about a
half inch so i'm just going to chuck in
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this little bitty probe
there's a wrench here for that probe but
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i don't really need it
uh and then this spins here and so to
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prevent it from spinning
i get you have an extension arm here and
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the extension
arm bangs into
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this stop here i've used this little
magnetic stop on the clamping setup
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okay so now the wiggler is ready to be
used and we are going to uh lower the
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speed of our mill to the low speed
and i'm gonna uh let's see
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turn it on and lower the speed
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all right
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so
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maybe you can already tell what's gonna
happen here but here's how it's gonna
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work um
every marking on this gauge is
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uh is half of a ten thousandth
sorry half of a thousandths every
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marking on this gauge is
five tenths or five ten thousands of an
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inch
oh yeah really really uh
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precise so what i'm going to do is i'm
going to bring this
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probe into contact
with the interior of
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the hole now when i turn the machine
you'll see
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that this dial starts moving like this
and what will happen is i will use the
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xy
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handles on my milling table to dial in
until the dial doesn't move and when the
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dial doesn't move anymore
well that means that we are concentric
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with the hole so
let's do it
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now the philosophy of doing this is a
process
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of moving each of the handles
until you see more movement on either
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side and you start dialing to the middle
and then you move the other one and you
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move it until you see more movement and
then less movement more movement and
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less movement you keep on doing that x
and y
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x and y x and y eventually you bring it
to where
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uh as you saw the dial wasn't moving
very much at all now i've got some noise
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in my system my
my spindle probably needs to be rebuilt
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the bearings need to be repacked this
mill was born in 1968 after all i don't
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know when the last time it was
the head was rebuilt if ever so that
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noise causes the needle to move around a
little bit because it's a sensitive
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piece of equipment
however i'm familiar with the operation
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of this one enough and
you can watch youtube videos of other
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guys with better mills and you can just
see that dial
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eventually just stops moving um with the
noise in my system there's a bit of
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vibration but
yeah the wiggler is how you get that
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level of precision now you can also
measure
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the outside of a hole the out i could i
could have
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centered on the outside of this all the
different probes that are part of the
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wiggler
uh allow you the ability uh
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to basically center on any kind of
circle an interior or an exterior circle
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from
super tiny to a literally like um
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a punch point all the way to probably
something about this big in diameter
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these cost a few hundred bucks they're
they're not cheap and maybe a couple
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hundred bucks
um however i will say i use this thing
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almost
weekly and uh when you get pretty good
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at it the setup
is not as laborious as it may have
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seemed in this video
uh yeah that's a wiggler and that's how
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you center your machine
above a hole thanks for joining me for
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this tool tip
i will see you guys next time
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