Showing posts with label router. Show all posts
Showing posts with label router. Show all posts

Tuesday, July 22, 2008

Making Neck Pockets, Screwing Up, Making new Plans

I took advantage of the nice weather a couple weekends ago and had a crack at routing out the neck pocket on the cheapo guitar. Rather than use normaly router bits and a template following kit, I decided to use a template following bit. It has a little bearing on it that rests against the edge of the template which you can see here:


Here is how it follows along the template. You can see that the bearing keeps the router bit from cutting into the template:


After my first crack at, I found that for some reason it didn't cut it completely and there was a little bit of wood still sticking up on the side:


I solved this problem by moving the template over a bit and routing it off. Bad idea. It turns out that it wasn't that the pocket on my template was wrong but that the little stem for the neck was a little too wide. Now my neck pocket is a little too wide for the neck. I am getting kind of ticked about not having my baritone neck, which was what was destined for this neck pocket on anything and this is yet another guitar that won't turn out to be up to snuff so I think I'm just gonna buy a decent Squier Tele and put the baritone neck on that and use the Squier neck for this guy. It kinda sucks that on my second try, I can't make a guitar better than a Squier but there it is. Squier has CNC machines and millions of dollars. If I had that, I'm sure I could make a damned fine guitar.

Anyway, w/ that done w/, I used a template and the same bit to carve a little recess for the control cavity cover. Ended up having to free-hand it a bit and it's not perfect but pretty good. You can see it's a little rough around the edges:


The wood on this guy is a little thicker than a standard tele body so I wanted to make a little recess for the neck plate too. Note to self: make sure that router bit is deep enough that it doesn't destroy your template:

Lots of work down the tubes there. At least it doesn't look so bad I won't be able to fix it up a bit w/ a sander:


After these two mistakes, I decided to call it a day. Sometimes you just gotta leave well enough along. On the brightside, at least I'm not this dumbass fly who got stuck in the carpet tape I use to hold my templates in place. He's dead dow:


Fly: 0
Frank: 1
Luthiery: 2

Second place isn't bad, I guess.

Monday, October 29, 2007

Shaping and Scraping

Ok... My camera is giving me shit so if you're just here for the pics, this is all you get:


So there you have it. That's the body of the cheapo guitar cut to shape and routed. I used pretty much the same method as I did on the baritone body. The only difference is this time I frakked up the glue joint between the two pieces of wood so the top of the thing wasn't quite level so before I started I put some eighty grit paper on my random orbital sander and whirred it across the top and back a few times. Worked like a charm. I used the same template as I used for the baritone body. I like it and just can't think of anything better.

First thing I did was trace the outline on the body and do a rough cut w/ my jigsaw. Last time I tried to use a smooth cutting blade and get as close as possible, which worked OK. This time, I just went ahead and used a fast cutting blade and stayed about a half inch outside of the line. If anything, this method left me w/ less wood to cut away during routing--and it must have saved me fifteen minutes or a half hour w/ the jigsaw. Of course, it could have just been the fact that I have greater and more substantial jigsaw skill now but I really do think this was the better method of doing the rough cut and will continue to use it in the future.

After that, it was a simple matter of routing. I set up my template follower to cut a sixteenth of an inch outside the line and am glad I did. There was a little bit of tear out but, unlike last time, I left some extra wood. Once I was done routing, I just took my trusty random orbital sander and sanded down to the line.

So far, I must say this is head and shoulders above the first one and I think I'm gonna buy a nicer neck than I originally planned. I like the kinda weird streaks on the cheapo alder I'm using and I think this one will be nice enough just to finish w/ a couple or five clear coats. I'm thinking I will get a tele-style neck w/ a maple fingerboard and it will look really simple and classy. Probably go w/ chrome hardware and chrome-covered humbuckers. The only weird thing is it's gonna have about six knobs because of the electronics I'm gonna cram in there.

Sunday, May 27, 2007

Routing--Stage Four

It's perfect guitar-making weather here in Chicago and I took the opportunity to get some real work done and rout the pickup and control cavities. I was also hoping that I'd annoy the neighbors enough that they'd leave their backyard barbecues to come yell an me to knock it off, thusly giving me an excuse to rip their faces off w/ a router, but no such luck. I don't have anything against them but I just have a thing w/ routing faces. What can I say?

For the pickups, I taped the template to the mahogany and cleaned out the spots for the rout w/ a Forstner bit. Unfortunately, my drill press isn't big enough to do this sort of thing so I did it really carefully w/ a hand drill. I wrapped a bit of tape around the bit to use as a depth guide:


This trick works well enough for drilling ordinary holes but not so great w/ the Forstner bit unless you want to spend all day wrapping tape around the bit until its actually thicker than the head. I ended up pretty much just eyeballing it. It worked fine but it did make me nervous. For whatever reason, I decided to do this part inside and I have a feeling that I'm going to wallowing the strange sawdust a Forstner bit produces which looks for all the world like a big pile of pencil shavings:


There was quite a bit of cleanup to do w/ the router once I was done. As I've mentioned, the holes in the templates are jut barely big enough to squeeze the pickups in so I set up my router w/ a bit that was slightly larger diameter than the bearing that follows the template:


This actually ended up taking out a little bit of the underside of the template too, which isn't a big deal aside from the fact that MDF is hard as a rock and you really gotta hang on to keep the router from flying out of your hands:


The pickups fit in there really well. I didn't get it absolutely perfect but you really gotta look at it to see anything wrong:


The pickup in the picture is a tilted because it's sitting on top of its lead wire, which brings us to the next step: drilling the hole to connect the pickup cavities. I did this using a drill bit so long it's almost comical:


Seriously, it's about a foot longer than I need but my local mega mall of mega home supplies only has normal length bits and super long ones so I was forced to go w/ this. Drilling the hole was easy, you just start at the neck pocket and drill right on through. I forgot to take a picture while I was doing this but this should give you the idea:


The end result looked pretty good. I didn't get the hole quite straight so a bit of the bottom of the bridge pickup cavity was gouged out by the drill bit. I'm not gonna worry about it but next time I think I will try to drill a guide hole first:


W/ that taken care of, it was time to get onto the more difficult task of routing the control cavity. You would think this would be less critical--and maybe it is--but I wanted to set it up so that the control cavity cover would be recessed to be flush w/ the back of the guitar, which added a lot more work. First, in order to get the router so that it didn't cut too much away, I had to shim it up w/ scrap pieces of MDF. I'm gladI bought those extra clamps now:


I took off about an eight or sixteenth of an inch of wood for the area that's gonna be the rim of the control cavity:



I had started to remove the wood in the middle but realized that it was just gonna be removed anyway when I drilled out the excess wood w/ a Forstner bit. Thankfully, this time I could use my drill press and it came out much nicer:


I should note that I drilled the holes for the controls before hand so I could test the thickness of the top by putting the knobs in there. I also figured I could use them to get the template centered well, which didn't really work but whatever. So that I didn't rout out the wood that was to be the rim, I use the reverse of what I did for the pickups and made the template bearing larger than the bit so it left a little bit of wood untouched . In the end, I didn't do that bad of a job of it:


It's really close but even though that one hole is so close to the edge the pot still fits in there, albeit just barely. It's good luck rather than good planning but I'll take it. I ended up having to repeat the first step to get it so the plastic cavity cover to fit but I got it in the end:


The one last thing I wanted to do was drill a hole from the pickup cavities to the control cavity. This is where my lack of planning came back and bit me in the ass. Basically, my plan was to use a hand drill and just drill right in:


This would have worked great but the relative locations of the pickup cavity and the control cavity were such that it was pretty well impossible to get the angle right. I said a Hail Mary and just went for it. The drill bit came out of the rim of the control cavity:

It will be covered up by the plate so no big deal but I'm still sort of cheesed at myself for not seeing it coming. I drilled it out a bit and will clean it up w/ a Dremel or something at a later time.

And here is my little lady so far (looks nicer here than in person):

Tuesday, May 22, 2007

Routing--Stage Three

I turns out I should have been more careful drilling the holes for the screws to attach the template to the body; they were two small and one of the screws broke off when I tried to extract it. I had to bend the thing and unscrew it w/ a pair of pliers:


For the rest of this project I'm sticking the template to the body w/ carpet tape. It's almost too strong for the job. I was worried the tape would pull chunks of mahogany out of the body when I pulled the template off of it.

I finished up the neck pocket today. The first thing I did clear away as much wood as I could using a Forstner bit in my drill press to save wear and tear on my router and bits. I don't have a proper table built yet so I ended up clamping the template I wasn't using to it and supporting the body w/ that as I worked on it. It turns out that there is indeed a very fine line before clever and stupid:

Worked like a charm (somewhat to my surprise). A Forstner bit, by the way, is sort of an improved version of spade bit. It drills wide holes w/ a relatively flat bottom. It looks almost like a router bit:


I set the depth and drilled away until I had most of the wood cleared. The depth gauge on my drill press isn't too accurate so I did a few practice holes on scrap and double checked w/ a small ruler to make sure I didn't drill too much. When I was done, it ended up like this:


From here it was a simple job to clean it out w/ a three-eighth inch straight router bit and the template following guide. I worked very slowly and carefully and only ended up w/ a few minor mistakes that are (hopefully) mostly cosmetic and will covered up when the neck is attached anyway:

Ultimately, the neck fit in a little less tightly than I'd hoped but it does take a nice picture. Not too shabby for a first go at it, I say:


I realized another mistake I made which was not making sure the edges of the template were completely square w/ its top. There was a bulge along the in the middle of the template's edge that held the neck tightly but the template follower followed the top of the template rather than the middle so I routed out more than expected. It's close enough for rock and roll though. I'd imagine it's only marginally less stable than a standard tele neck pocket (which doesn't have support on both sides) and once I get some finish on there, it should fit in even better. If worse comest to worse, I will just insert shims on either side of the neck to keep it from going back and forth. The depth of the pocket and the very end of the heel are right on so there's no reason it shouldn't be stable in the direction the strings pull on it, provided I get the holes drilled properly.

Monday, May 21, 2007

Routing--Stage Two

Here is a better picture to illustrate how I'm using the router:

You can see the cutting bit and how there's a little metal ring at the top that rests up against the template so that it follows it rather than just cutting all get-out out of everything, which it will do when given a chance. If the router was a member of the animal kingdom, it would most likely be part of the weasel family. Safety first:


Seriously, this thing spits out sawdust and wood chips like nobody's business--somewhat near the bottom of the list of things you'd want to get in your lungs and eyes. I really need to get some safety gear that looks more bad-assed. I just look like another geek in a flannel shirt in that picture.

At this point, it is just more of the same from the last time I routed. You take multiple passes around the template shaving off more and more each time. I did a little too much this time and it cased some problems, not the least of which was that it made the router harder to control. Next time, I will stick to taking of a quarter of an inch at once, maybe even less until I get a better hang of it. My router bit wasn't long enough to get the whole thing, so eventually I had to take the template off to get the last quarter inch or so. (I used the part of the body I'd already cut out as a template for the rest of it.) It made me a bit nervous not to have the template on but I came through OK. Once I had the whole thing shaped I used a roundover bit in my router to smooth the harsh edges:


As you can see, there's a curved cutting edge and then a little bearing on the end. The bearing guides it along the edge of the wood. I just got it lined up and let it rip around the edges. It wanted to jump around but through strength and vigilance I kept it under control. This part was significantly easier than the rest of the routing, let me tell you.

Ultimately, I don't think I did half bad:


Definitely some tear-outs but nothing that bad. Next time, I will leave an extra sixteenth of any inch to work w/ like someone who's not a dumbass. This time, unfortunately, I'm gonna have to use some wood filler to fix the tear-outs. I'll probably darken the stain I'm using to hide it a bit. Besides, I think I'll kinda like it that way.

Thursday, May 17, 2007

Routing--Stage One

Even though I don't have all the bits to finish the job, I figured I'd get a head start on routing out the shape of the baritone body. I had to do a few things first before I got started though. First, I used my jigsaw to modify the rough-cut body to compensate for the design changes I made in this post (the little block of wood is what I cut off):


I know, real exciting, right? Well--it only gets better. The next thing I did was take my hand drill to drill holes through both templates and the body so that I could attach the template to the body w/ wood screws to keep it from moving around while I used the router (the screws go where the pickups will be so there won't be any screw holes in the top of my guitar):


Woooo! And w/ that done, I am ready to rout.

I will take a second here to discuss routers since, honestly, I didn't know what one was before I started researching guitar building. Basically, it's a powerful electrical motor which spins a cutting bit at an incredible rate of speed. Mine is probably almost as sweet as a Buick Grand National--and I don't say that about a lot of things. What makes it so sweet? Have you ever found yourself w/ a block of wood that you knew would be a great guitar if it weren't for the fact that there's just way too much extra wood? Well--a router takes that wood and turns it sawdust:


Most people who make guitars use a template following bit, which has a little bearing on it so that it follows a template and only cuts the wood you intend to cut. My router came w/ a little template following kit that that allows you to use a regular straight cutting bit for the same purpose. I think this picture best illustrates what it does:


The light wood on top is the template and the reddish stuff below is the future guitar. The template following kit basically serves as a guard so that the cutting bit doesn't cut the template. The cutting bit itself cuts a narrow bottomed groove around the edge. (You can see that there is a little bit of mahogany sticking up in the middle that I missed.) You can only cut a little bit of the entire depth at a time or you run a greater risk of tear-outs and other woodworking screw-ups.

As I mentioned, the router bit spins really fast and can severely fuck shit up if you're not careful:


That took about one tenth of one second to happen. These really are one of the most dangerous tools you'll come across and utmost caution should be used w/ them at all times. Seriously, you can slack w/ some things but a router is really a beast to be reckoned w/. Fortunately, that slip up and a little tear-out were the only problems I had and it all came out pretty well:


As you can see, I'm only a third of the way though. I need some longer bits to finish up. Hopefully, I will get to that in not too long. For now, I am just pleased that I finally got to have at the mahogany after working on the template for so long.