Hello welcome to Enots engineering I'm Alan
today in the workshop we finished making the rotary head
we drill the hole for the cable and we fit the back onto the head
and then connected to the computer and test that it works
so let's go to workshop and see how we do it
the last job on this plate I've fitted the bearing
I've moved it now so that I'm drilling the hole here to fit the cable adapter that we made
this needs a hole diameter of 10 mil
I'm just setting this piece of aluminium up this is for my cam belt tensioner
what I need to do is take about five mil off the face here
so that the bearing will move down to further 5 mil
so first I need to get this running true and it's running out a few thou
this chuck I can centre and the way it works is there are three
cap heads going through here with a taper on and as you tighten the taper up
it pulls the chuck up on the back plate to recenter it
so what you need to do is get the lowest reading which is about there
select the adjusting screw that's nearer to the dial indicator which is this one here
and what I will do is turn it you can see it's pulled it over a thou
that's getting pretty close now so get the lowest reading again
What I will do is make sure that I can slacken the other two off
I don't want the tension too much on the others
this this dial indicators in tenths of a thou
it's about the lowest part there I'll just move there up to the
5 position
move it 0.0002"
Zero it there
so that's running out now to 0.0003"
and because it's going backwards and forwards
I think that's the lowest point there just nip this one a little bit more
just less than 0.0002"
I don't think I'm going to get any better than that
so I need to take 4.5mm off the face
That should do it
we will just do a quick update of what I've done
we bored the bearing bores out with the 2-inch boring head
we've made the spherical connector and we've drilled the hole
bolted the spherical connector in and what I did on this
I've soldered the wires on to the socket
to cover the wires I've just put shrink tubing on
so it's not going to short out on anything
this is ready to fit to the rotary head box
this is the box so far
I fitted the stepper motor in
this side bearings in pulley on the stepper motor
on the top I've drilled the hole through
that hole is so you can lock the spindle when you want to get the chuck off
or tighten the chuck up on the spindle
otherwise as you turn the chuck it's turning the stepper motor and the belt
you've got nothing to lock it
so by drilling a hole in there I can pass a bar through which goes straight
through the spindle and locks the spindle
So the next thing I want to do is put the cover on the back
fit the plug into the socket this lines up only go in one way
and on the outside is a screw so there's a sleeve that tightens up
so that won't come undone and that goes into the head
the bearing has to go in that way to line up with that bearing
make sure the cables out the way tucks in the back
that cable should took under this side out the way
so the spindles not interfering with it
That goes in there
This rotate so you can plug it in anywhere move the cable across
so the
The next thing to do is put the screws in counter sunk screws
they go in here so
now I need to put the spindle in
it just goes through the bearing
you can see here the hole which lines up with the hole in the case
through the back bearing
I'll just put the spindle in
before I put the spindle in fully
I need to put the pulleys on this end
What I've done is marked up on the pulley and on the spindle
Where the flats are
where the grub screw are on the pulley and where the flats are on the spindle
so I can put this on
this pulls the spindle through and clamps the two bearings together
a couple of drills just go into the nuts
and then you can use that to tighten the nut up by hand
It doesn't need to be too tight put the second nut on
you know there seems to be a lot of play there
but I cannot get the belt on if I try and slide the belt over the pulley
so I have to put the belt on before I put the pulleys on
next we fit the belt tensioner it goes on this way
On the belt tensioner if I tighten this up too tight I'll be stressing the belt
it just needs a bit of play there
so all the tensioners doing is just keeping
a slight tension on then you can see
if I go backwards there is some play in that belt
it's a toothed belt so it doesn't need to be like a v-belt it doesn't need to be too tight
Its just taking some of the ply up so it doesn't slop about
reducing the chance of the belt skipping a tooth
just tighten that up there
make sure there everything turns okay
then the next job is to tighten up the grub screws behind this
after a lot of fiddling about trying to get the allen key through the back
Theres a three mil hole of drilled in here The Allen key will go straight down into the crib screw
tighten it up turn it to the next one
into the grub screw you can see it's moving tighten it up
Trying to get the allen key through the back here into the grub screw is virtually impossible
so by drilling a hole straight through straight in
so that's all ready now for the back door to be made
for that I'll just drill four holes on the outside put two screws through
make a cover that fits on the back
the front's finished
and the sockets finished
I've just booted the computer up
so I want to see if it will work
I will type in A 50 Degrees
See that's working okay
I'll just show you on the computer the readouts I'm getting
so this is the the axis
Press zero to zero it
Axis a the angle do you want to go to say 150
press return
here you see it's gone to 149.9850
if I say I want to go to 360 degree or zero
Type A0
Its moved to zero
A 150
Its moved to 149.9850
A zero
It repeats to the zero
149.9850 so its repeating to 3 decimal places
but whether that is actually doing exactly that's on the rotary head
I will have to check that
so to fit this to the milling machine
I'll use these cutouts and the clamping bar can go inside the cutout to clamp it down to table
two on this side two on the other side
or if I need to rotate the box around clamping positions on here
or if I want it upright we have clamping positions on four sides
so this will fit on the milling machine table
the spindle mount here is the same as the boxford lathe
so it fits my four jaw chuck my three jaw chuck the bore is a number three Morse taper same as the Boxford lathe
so it can fit all the collet adapters and other parts that I use on the lathe
on to this and also on the back I've fitted the cover
Now when I said I could use it on the lathe
this is how I see it being used on the lath
Some lathes of T slots on the cross slide so you can clamp down the head
put the chuck on this side milling cutter in the lathe and then you could
either machine the plate an indexing plate
you can have it this way or move it around that way
That will go back further if I move the guards off the back
well that's it for today I hope that was useful and hope to see you next time on
Enots engineering