In the past I always cut these pantograph pieces from paper templates
but my computer and my printer haven't been getting along that well lately
so I'm just drawing it on the plywood from scratch.
I just cut all the pieces for the router mounts using just the drawings
and I cut out the handle and these two links
and these all consist of rectangular parts
so I didn't film any of that.
And these links are going to pivot and hinge on pins like this
and I'm gonna use this thicker one for the main hinge.
These windsurfer the other links.
the thinner these pins are, the easier it is to move the pantograph
although not too thin or they'll bend.
So now I have to drill some very accurate holes in these pieces for those pins.
I'm gluing the links together in stages
and that way I only have to worry about lining up one thing at a time.
I bought this router off of Amazon and this one is lightly smaller
than the usual 89 millimeters.
I knew this when I bought it,
I just need to draw a different size circle on the template.
I don't know, maybe a little too tight.
I cut tiny bit off of here and here where it rubbed the most.
And now I'm actually pretty happy with that fit.
I got this part of the router mount link glued up
and I was just checking the measurements on here
and I put it so that 20 is in the middle
and there should be 12 in either direction for the holes
and this hole looks like it's to the right by about half a millimeter
i think i should fix that but before I do that,
I think I'll glue the last pieces on with those two links.
I fixed this inaccurate part by making another one almost identical
and I glued together this part of the router mount link
just glue around these square blocks.
Putting the last layer on the alignment for that will be really critical.
And the next thing I need to do is to drill some holes
through this part this will be the operator handle
and there's no way I'll get that hole straight enough with a thin drill
so I'm going to drill from this side. And from this side
and hope that those holes will just kind of lunge it up and they'll in the middle.
Well it lines up well enough that I can get the pin in there
On this pantorouter I have a little clamp right here
that clamps the follower bearing this way
But I had another idea. So for this one
I've got a hole in here and a cut-out in the side
and this part goes in there.
And then the knob goes on here when I tighten that
That locks it in place
except I screwed up a little bit because I meant for that knob to be on the top
except I cut the cabinet on the wrong side
so I'll just end up putting the bolt on the other way around
and then put the knob on here.
I want to get a very snug fit for the shafts here
but now the fit is too tight
so I made a rumor bike lining a slot
up into the end of one of these shafts with an angle grinder
and I can use that to expand the hole for a snug fit.
The most important aspect of these two links
is that the shafts are exactly parallel.
Checking the distance here. And then on the back.
It looks like you have a tiny bit of play.
I'd say probably about point two millimeters which I think is acceptable.
Now let's make sure there's no twist in this thing.
Uh oh. So I do have some twist in there.
So the needle moves by twenty thou
that's about half a millimeter that is unfortunate
But
with only a moderate amount of force I can force that into compliance.
I will make this thing again.
I might have to fill one of the holes and re-drill it
but I'll just see how it works when I put the pantorouter together.
This one's a little bit worse on the spacing front.
But in terms of twist it's only half as bad.
I'll call that good. Checking over this part I realized
this hole is about a millimeter too far this way.
This is a problem. I'm gonna try to fix that
by reaming it and using this piece of wood as a guide.
Now I got to to slide it by a millimeter.
Well I think that's moved far enough because the parts can mate.
I just need to glue a spacer in there later.
I'm kind of afraid of doing the final glue-up on this
because if it's misaligned I have to remake the part.
So I set up this jig.
This ensures the shafts are in a plane,
and then these stops make sure the shaft on the end
at least is at a right angle
so that if I put it on here,
Ill do the final clamping I can make sure everything is straight.
These two links join the main support at the bottom
and they need to tilt against each other
except this hits here which is why these ends need to be chamfered.
Getting that second washer in place is really tricky
and I used an extra shaft to capture it in place
while I push the main shaft through.
I've been lining these up very carefully
and this is where the pantograph mount goes.
Now I need to transfer the pilot hole locations
and I'll do that just by driving the points into the wood.
I still have some work left to do on this paragraph,
but I'll leave it like that for now. In the next video
I'll start building the template holder which goes right here
that's this thing here on my other pantorouter
except this time it's gonna be a bit of a different design.