This step is gonna take forever.
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Crawl and 1OOO |
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Phew, finished another coil. Well, winding it, I'll have to finish the connections and solder it tomorrow.
This step is gonna take forever. |
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Crawl and 1OOO |
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Dammit!!
When I was soldering, I was holding the piece with my fingers, like an idiot (even though it worked before). It got too hot, I dropped it, and the wooden top popped off. I finished soldering it (holding it with pliers), but now I gotta figure out what the fuck to do to keep the coil from coming off. I guess I'm gonna need to try to coat the top in wax early. I'm typing this post one-handed because I'm holding the coil in the other as the water heats up. |
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Crawl and 1OOO |
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I guess it worked. I only waited until about 20% of the wax was melted, then dipped the tip. Not only was that faster, it was probably better overall, since
the wax was cool enough to harden immediately. Since it covers the top of the coil and the top of the magnet, it will hopefully lock everything in place.
I didn't want to dunk the whole thing, because having the wood coated in wax will probably make it difficult / impossible to use wood glue, and after I have all these little pieces, I'll mount them on another piece of plywood. Then what I'll probably due is screw that into a piece of maple that'll act as a pickup cover. I'll have to do tests on it tomorrow. First, of course, just if the connection / resistivity is good, but I'm really looking forward to testing how it handles hum. |
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Crawl and 1OOO |
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Boy, my original prototype pickup looks like absolute shit now. The coil is deformed all to hell, and every manner of dust and debris is sticking to the wax.
I hope the only problem with the coil being deformed came from the wood top coming off early. Otherwise -- say, if when I "potted" it, if the wax that got into the coils caused it to expand -- then it'll be a problem for all of my pickups. For the real thing, I'll probably have to coat the wax with a thin layer of something (lacquer or enamel) to protect it. |
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Crawl and 1OOO |
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I can't tell any difference in the amount of hum, whether it's wired up in or out of phase. But maybe the other wires are picking up too much hum and
I need to test it with those shielded. I just assumed that the bulk of the hum would be picked up by the pickups.
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Crawl and 1OOO |
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It definitely cancels some hum, but there's still a lot of electrical noise.
MP3 file of hum. What I'm doing there is just flipping the pickups back and forth so that they go back and forth between being hum canceling and not being hum canceling. There's always some electrical noise, but it becomes noticeably louder periodically, which is when I got them flipped the non-hum canceling way. (There are also a couple of loud bumps from when I accidentally knocked the pickups together -- hey, they're magnetized, so that's easy to do). Gee, if I can't get the noise down lower than that (when they are hum-canceling) I wonder if there's any point in even trying to make humbuckers. I think the sound and signal is fine with just a single coil (it might even be better -- hard to say, though) The main thing I can really think of is to try to shield the electronics a little more. I tried wrapping it in aluminum foil, and grounding it, which had no observed effect, but it was kind of a ghetto arraignment. Maybe I could try doing a better job of it. Another thing I could try would be to see if some coils work better with others to cancel hum. Oh, and I finally broke a wire while pickup winding |
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Crawl and 1OOO |
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I should keep a list a things I still need to get.
-Dots for the side -Fretwire -Fretsaw -Fret Miterboard -Fret Board -Epoxy? -Maybe a Stratocaster style jack (if I want that option)? -Strap buttons -Ferrules (I have a string-through body / bridge bridge). -Sanding blocks for radiusing the fretboard -Maybe something to level the frets (if I don't want to try to find an oilstone like Hiscock recommends, goodness knows where I'd find that) -*Maybe* a fretting caul (if I don't want to hammer them)
Last Edited By: Flying Omelette
04/17/08 6:22 PM.
Edited 3 times.
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Crawl and 1OOO |
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Someone on another forum said that the noise should go away when I have it permanently soldered up, shielded and grounded ... but I'm not quite sure he
understood my question / sound sample, since he said the low frequency hum is "normal". But not with a humbucker it isn't???? But at least
I'm able to get rid of the low frequency noise....
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Crawl and 1OOO |
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Listened to two albums, did about 1,300 winds. By the end of the first album, I only had maybe 300 because starting is the most time consuming step.
Grounding the bridge is gonna be tricky. I'll have to drill a hole from the control cavity to one of the screw holes that holds the bridge. I don't expect that to be easy to line up. Maybe I could do it from the pickup cavity instead. Then it should just be a straight shot.
Last Edited By: Crawl and 1OOO
03/19/08 12:18 PM.
Edited 1 times.
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Crawl and 1OOO |
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I wasn't sure that the first guy on the other forum understood what I was doing with my pickups, but I got a second opinion, and he said that, yeah,
alligator clips will add noise like that.
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Crawl and 1OOO |
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Broke another coil while winding =(
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CRAWLand1000 |
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I was so frustrated by the pickup winding that I decided to try something else, and have put a little bit of effort into getting the neck ready. The first
thing will be getting the headstock glued on.
I practiced on scrap and it turned out really well on the first try -- so well I just would have used that piece except that it was just slightly too short for the neck. When it was time to get the real piece ready, the first thing I did was plane one edge of the wood. This will be so I have a nice straight edge for my router edge guide to follow when I route the channels for the truss rod and carbon fiber. Some shots of that. This is the thing in action (or just about) that I showed being built in reply 34.
The work piece is the wood with the green edge facing the camera. You can also see the bandsaw I use in the upper right. A power sander is in the distance behind the router, but you'd never know what it was if you didn't already know.
Different angle.
Maybe the angle that is easiest to see. I think that one leg, in the foreground on the left, was damaged when the horizontal bandsaw ripped it from the vise. Fortunately, the top was still okay. After that, I used some trigonometry, a calculator, and a right angle to draw a 14 degree angle. Why 14? 10 is common for necks made out of one piece of wood (without a join like I'm trying); 15 was recommended in one reference for a neck with a join. 14 gives me a degree of wiggle room in case of error.
You can see the smooth wood on the right, and unsmoothed wood on the left (plus a larger chip taken out of the far bottom left corner). I didn't bother to plane the last inch. Reason 1, well, now you can see the difference! Reason 2, it'll just be cut off anyway. Reason 3, that part of the wood was significantly less level than the rest of the wood, and I would have had to have cut off a lot more to get that part level. Similarly, it's important to do all the measurements on the side of the wood that's planed. That's the only side that can guarantee you parallel / perpendicular lines when you use a square. It is also important to measure twice on both sides of the wood to be sure the distances are correct and didn't "wander" when drawing all those lines. Now, I considered all sorts of things for how to cut that angle. A table saw might be ideal, but we don't have one -- that works. My first attempt was to use the horizontal bandsaw. I figured I could make a 75, 76 degree reference, rest the workpiece on top of the reference, put it all in the vise, and have the blade come down in its constrained path and cut it perfectly. No such luck. That angle is so steep, the horizontal bandsaw can't be raised over it. I could lower the wood, in principle, by sliding it back along the angle. But that bandsaw doesn't have any room for the wood to go, and besides, 75 degrees is steep enough that to move it down enough to get under the blade moves the wood completely away from the blade horizontally. Another possibility was turning the wood around and cutting it at the bottom of the slope instead of the top. But then it wouldn't be anywhere near the vise anymore. So, I ended up just sticking it in the normal bandsaw and cutting it free-hand. I had to expose about 6 inches of the blade and cut through that much wood at once. It was very slow going -- it took me at least a half an hour to make that three inch cut. The friction from the blade scorched the wood, and it when it finally exited, I could see smoke. The blade also got badly stuck twice when cutting the practice piece, and once when cutting the real one. Also when cutting the practice piece, when it got stuck the second time, it threw the blade off the wheels. I don't think I can set up the blade as well as whoever did it before, which is maybe why the practice piece actually turned out slightly better than the real one. When it got stuck on the real piece, I looked for some bandsaw lubricant, and couldn't find any. I tried WD40 for the heck of it. Maybe it worked. Here's what it looked like:
The black is from the scorching. Obviously, that ain't a finished job. It needs to be planed just like the edge. This will be a little trickier, but I think I have a solution. I haven't been able to try it yet, though, because the shop area has been in heavy use lately. Anyway, I have two off-cuts from the practice and real attempt. My plan was to do something like this:
Brace the neck wood (brown) with the two off-cuts, clamp them (grey) and clamp it all to a horizontal surface. Then the edge that I'll glue the headstock to will be perfectly horizontal, and can be planed. Maybe with a mill, which was my first choice, but I now think I might be able to do it with the router, too. The problem? I tried setting this up, and the future gluing surface was nowhere near horizontal. It was slanted upwards, meaning that if I planed it horizontal, I'd end up with an angle greater than 14 degrees. I first thought the laws of geometry were broken until I figured out what was going on. The band saw does not want to enter a piece of wood at a 14 degree angle. That's pretty close to glancing. So, the tendency is for the blade to bend and just travel alongside the wood as you push the wood in.
The off-cut ended up looking like this (but less exaggerated)
The cut line followed my drawn line, and so was at 14 degrees, but the angle from the bottom right to the upper right is greater than 14 degrees -- consistent with what I noticed. I sanded down that "step" where the blade entered, and now it seems like the area to be smoothed does lay horizontally. "Without a foothold in the past, we cannot walk towards the future." -Vagrant Story
Last Edited By: CRAWLand1000
04/16/08 2:30 PM.
Edited 3 times.
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CRAWLand1000 |
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Neck progress.
Here's the real-life set up I described in my last post:
The clamps around the offcuts and work piece:
This was sort of a difficult step. I tried several times to get it all clamped up, and it wasn't working at all. Everything would start shifting when I went to put the clamps on, or when I tightened the clamps, or all that would go more or less okay, but the workpiece would still shift if I tried to jiggle it. The solution was to use double stick tape. I used the heavier stuff, not the clear Scotch brand. In fact, I think in the first picture, near the back leg, that that roll thing there is the roll of double stick tape. That helped tremendously. (Though even that wasn't enough to support the weight of the wood when it was diagonal before it was clamped -- it just stopped it from sliding afterwards) Taking a look to see if the cut surface to be planed is parallel:
Part way through the first pass. For the first two passes, I took off 1/16" at a time. Regions that are low (and not planed) are obvious. Also obvious is some wavyness to the router cuts. You might think that that would fuck up the chance of getting a nice plane surface, but ... I continued...
Picture of me working. I'm wearing a mask to keep sawdust out of my lungs.
Second pass, another 1/16 off. Some wavyness is still evident, but it's looking a lot better!
I didn't think that the thickness needed to be changed much anymore. I set the router to take off another between 1/64 and 1/32. I then did multiple passes at that height. THAT took off almost all of the wavyness and left a very nice surface (I will still sand it, however, before gluing):
Final shot of my set up after I was done. You know, another problem was setting this up. Before I tried setting anything up, I thought I could have the clamps on any side of my little table. This was of course because I didn't realize that those rails would block the clamps on that side. So, I needed to have a work bench that let me clamp on an edge, and there was only one really suitable work bench for that. Another problem, which I also didn't realize right away, was that bracket on the wall there was exactly where I needed to move the router sled! I had to tilt my table away from the wall there (with part of it hanging off the table) so I could run my sled by. I also see that the large piece of wood that I used to raise everything up to the point that it would be clipped by the router is not sitting flat against the table's base. Those other three smaller blocks of wood don't do anything, really. I thought putting them under the diagonal piece might make it slightly more stable, but they're not clamped or anything.
There probably should have been saw dust in that picture, but it didn't show up. One worry I had was, Okay, I can get the correct angle by using the offcuts to line up the piece. But what happens if the work piece is tilted off the axis of the offcuts? Then the headstock won't sit back uniformly by 14 or whatever degrees, but will be twisted. Well, I stuck a right angle against the angled back part, and the start of the angle is not perfectly 90 degrees from the edge. I took a picture of that, but it's impossible to see the point I was trying to make. Over 6 inches, it deviates from 90 degrees by 1/8 of an inch. I think that's about as good as it's gonna get, though. I'll take comfort, though, in the final width of the neck at the nut being about 1.75", not 6, so the deviation might be less noticeable. I think any problem will be cosmetic at worst. This picture shows how much wood I removed in the process of smoothing (since the pencil line previously went to the flat part of the wood):
Last Edited By: Flying Omelette
04/17/08 6:18 PM.
Edited 1 times.
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Crawl and 1OOO |
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So, now that I have the angle cut, of course I have to glue the peghead piece on. To do that, I'll have to thickness and, like I did with some other
pieces of wood, plane it.
But this will be a thin piece of wood, so I'll have to get a table for using my router sled with large, flat pieces, rather than on-edge pieces like my old table. It should be easy to do. First of all, even though I was mostly planing skinny on-edge pieces with the last table, I made it wide anyway so I could use the same sled with both tables. So, I won't have to make a new sled. Secondly, the hard part with the other one was the legs. I had to make them so long, and exactly of equal length, and the tops and bottoms had to be perfectly parallel. It occurs to me that maybe what I could have done was glued a bunch of squares on top of each other (the squares could be 2" x 2", and with 3/4" MDF, 8 squares would make 6" tall legs), but that's not what I did (maybe I was worried that the glue joins -- especially that many -- could make the legs slightly different heights.) Instead, I glued several pieces of MDF together in a big block. Then I used an end mill to chop off the top and bottom perfectly. The end mill actually produces smoother results than the router method. So, why not use that? For one thing, it's painfully slow. Mills are actually intended to machine to 1/1000" precision, so you have to turn the thing over and over to traverse large distances. Secondly, the one I have access to does not have nearly enough travel to plane any of the things I want to plane. Except maybe that head stock join, but in that case, Thirdly, it doesn't quite have the freedom of hooking things up to it that a simple MDF base has. I considered using the mill for the head stock scarf joint, but it just didn't seem like it would work. Finally, I had more wood grain tear out when I experimented with the mill. Anyway, after I had the block with the perfect tops and bottoms, I sawed it into four pieces, and those were the legs. For the new thing, all I have to do is glue two rails on the sides of the base. The pieces I'll work with are nominally 1" thick (they're more like 0.8"), so I'll need to use two strips of 3/4" MDF for the rails to get above them. I've already made one of the rails. It is kind of a pain to cut the rails out. I had to use a jigsaw, because the piece of MDF I'm using is too big to use with the bandsaw. And the jigsaw rattles the hell out of my hands. I'll use this table for several things: Planing the headstock before gluing. After that, I'll rough cut the part of the head stock that will poke out over the plane where I'll attach the fret board. Then I will plane the whole top of the neck. (I will probably have to cut a notch out of the base for the head to sink through) When it's time to work on the body, I'll plane the top half of the body. The bottom half of the body is nominally 2" thick (in reality, it's a little less than that) so I'll add a little more height to the rails and then plane that, too. I'm not sure if I'll have to plane my fret board, or if it'll come like that. |
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CRAWLand1000 |
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Cut and glued the first rail for the other side. I'll take a little break now, both for the sake of my hands, and also to let the glue set a bit.
"Without a foothold in the past, we cannot walk towards the future." -Vagrant Story |
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CRAWLand1000 |
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Got the other rail cut...
and glued...
"Without a foothold in the past, we cannot walk towards the future." -Vagrant Story |
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CRAWLand1000 |
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I marked an approximate center line for my neck wood (not in the center, but 1 1/2 inches from the straight edge) and another one 3 1/4 inches from the
straight edge (3 1/4" is very conservative -- I don't remember the figures or calculations, but I doubt the neck will need to be more than 2 1/2"
at its widest). I started cutting along that line with the band saw when I thought, what am I doing? There's no way in hell I'll finish this tonight.
"This" meaning, getting the headstock glued on. So, I'm done.
"Without a foothold in the past, we cannot walk towards the future." -Vagrant Story |
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CRAWLand1000 |
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I'm worried I didn't do a good job with this, but I got the headstock glued.
"Without a foothold in the past, we cannot walk towards the future." -Vagrant Story |
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Crawl and 1OOO |
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Okay, I'll explain that a little bit. First of all, that's a picture from what will be the back of the neck. On the top is an offcut piece I used to
make the clamps perpendicular to the glue join.
This might have been stupid, but I didn't do any real measurements for the headstock. I assumed if I made it big enough, I could cut it down to size later. Same thing for centering it, and aligning it, aside from an approximate centering by sight. What if it's not big enough, though? Then I'm in trouble. One guide that gave me some inspiration for what I did recommended using a screw to hold the piece in place when you glue it, but I thought my approach would at least be easier, if not better. I cut the piece 13" long. One book recommended 10" long, so maybe I'm okay... but maybe not, since I'll have 7 tuners, not six. And I set back the headstock piece a bit, which "wastes" some of that length. And some of the headstock, after it's been planed, will actually be where the fretboard sits. I think a normal headstock is about 8 inches long, after the fretboard. Well, no sense regretting what's been done. On that subject, I kind of was overzealous when routing the thickness. I stupidly did most of the thicknessing on one side, before I planed the other side at all. Then, when I had to remove a lot of wood from the other side, because it had some deep gouges, presumably from when it was sawed at the mill, it got thinner than I wanted. I was aiming for 9/16" thick, but got just about 1/2" (within a few thousands, according to some calipers) (which should still be okay, I hope -- 2 books actually recommended 1/2", only one 9/16". I guess I might be able to use extra washers to bolt down the tuners if it comes to that.) I used thick double sided tape to stick the headstock piece down when I routed it, and it worked pretty well. I sanded both the headstock and the angled part of the neck. I experimented with a sanding sponge I got at Home Depot. It was okay, but I think what worked better was a piece of sandpaper, which had an adhesive on its back (I used the finest grit that had an adhesive), that I stuck to a block of wood. I sanded the pieces until they felt very smooth to the touch. Then I put a bunch of glue on the neck and put it all together. At first, the headstock looked off center, so I gave it a last second shift. I use a lot of glue. I completely covered the join surface. I spread it around really easy -- I just use my finger. When I first looked at it, it only had two clamps, and it looked like the neck and headstock wood weren't touching towards the top of the headstock. I put two more clamps in that area. I think it looked okay after that. Of course, it's curing now. Ideally, I probably should let it cure for several days, so I'll have to fight my antsyness to keep the progress train rolling. One thing that's nice is that the grain for the wood I choose for the neck looks pretty close to quartersawn (that is, the stripes of the grain are close to parallel to the top and bottom of the wood, as opposed to being able to see curvature on the ends.) That should make it less likely to warp ... though so far, none of my wood has warped. Knock on wood. The headstock wood is a little closer to flatsawn. It doesn't seem easy to pick out wood in decent quantities (one plank I got was 4/4 wood, 4 board feet) that doesn't have any flaws at all, but I've managed to get pieces where the flaws are only on an edge or a side so I can cut them out.
Last Edited By: Flying Omelette
04/21/08 11:06 PM.
Edited 2 times.
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CRAWLand1000 |
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When I look at the join today, it looks pretty good. The two pieces of wood seem to be pretty tight against each other. If I had to do it again, I can't
think of anything I'd do to do it better. And I got 8.5 inches from the end of the neck to the top of the head. That's probably enough, especially
since I'll probably get about another inch of head from where the two pieces overlap.
"Without a foothold in the past, we cannot walk towards the future." -Vagrant Story
Last Edited By: CRAWLand1000
04/22/08 10:57 AM.
Edited 1 times.
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CRAWLand1000 |
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More pictures.
Another picture of it clamped as the glue dries, this time from the top:
The join:
That black crap on the back came from the scorched parts of the offcut. I wasn't good about cleaning up the glue before it dried, so I'll need to do a lot of clean up later. Front view. Some of the grain is visible:
Side view:
And, finally, a side view shot after just a little bit of effort to remove some of the excess wood:
"Without a foothold in the past, we cannot walk towards the future." -Vagrant Story |
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Crawl and 1OOO |
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I've been hemming and hawing about what to do about the pickup situation, since it had been such a hold up. I still want to -- at least eventually -- go
through my original idea. But I want to make sure I have *some* pickup I can use with it if all else fails. I was thinking of getting a really cheap pickup
and using it until my original is done. But I haven't seen any that are really cheap.
It's an obvious idea, but it just occurred to me this morning, when I was still in a sleepy haze, that I could just make an easy single, more or less standard single coil pickup (one coil for all seven strings). I have plenty of pickup wire left, so that's not a problem at all. |
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CRAWLand1000 |
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Finalized the neck dimensions, drew it out on paper, and cut it out.
The rectangle at the end is the space for the nut; the line up the middle is the path of the middle string. That is not necessarily the exact middle of the neck, because I discovered that the string spacing in the nut is not uniform. The three spacings on the treble side are 1/4" each, while on the bass side the three spacings are 1/4" + 1/32", to accommodate their larger gauges. I've decided -- for better or for worse, probably for worse -- to allow that to make the whole neck asymmetric. The fourth string divides the neck in two, running parallel to (but slightly off from) the guitar's middle line, and the spacings on the treble side will *always* be equal, while those on the base side will also *always* be equal, but those two things will never be equal to each other. However, the effect is small, because at the bridge, the string spacings *are* equal (5/12"), so the two sides become more and more equal further up the neck (that is, towards the higher notes -- the terminology always confuses me, because I think of the head as being the top of the neck). In fact, the amount the center string is off from the true center of the guitar is so small, it's less than 1/32". This is just the theoretical value; I don't know if I'll actually be able to offset it by that small amount. I'm just hoping something really stupid doesn't happen, like I align the neck so badly that the strings fall off at the end. So, anyway, next things to do -- Make the plywood neck jig. Finish removing the excess wood on the neck. Route the truss rod and carbon fiber channels, and glue them in. Then, after I order my stuff, it'll be on to the fret board! "Without a foothold in the past, we cannot walk towards the future." -Vagrant Story |
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Crawl and 1OOO |
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I might have found a cheaper alternative to buying that really expensive stew mac miter box. Because of course that's the main goal when making a guitar,
doing it as cheaply as possible.
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CRAWLand1000 |
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I checked the neck template against my original full size guitar print out. The necks had the same shape (which goes to show how immaterial the asymmetry was
-- the original was drawn to be an isosceles trapezoid) ... but the one just for the neck was about half an inch shorter?
Pretty weird (especially since the neck will have to be LONGER, since for the original I only drew it to the nut, while the template goes to the neck angle). I can think of a couple of reasons for this, but the upshot is that I'll have to do several remeasurements. "Without a foothold in the past, we cannot walk towards the future." -Vagrant Story |
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CRAWLand1000 |
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Yeah, I went through my guitar notebook, and I futzed up my calculation.
The position of the nth fret, from the bridge, is B = S/2^(n/12) with S the scale length of the guitar. I'm using standard Fender scale length, 25.5". I also decided, for little reason, to have 25 frets. So, that gives me the number. The position of the nth fret from the nut is S - B You then need to have so much more length to the fretboard; I chose 3/8". However, the second time I figured this out (I kept notes for the second calculation, but not the first), I added 3/8 of an inch to B, rather than S-B, so I ended up 3/4" short! Take off the space for the nut, and, yeah, my eyeball estimate of being off by ~1/2" was right. Good thing I didn't just jump right in to making the template. "Without a foothold in the past, we cannot walk towards the future." -Vagrant Story |
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CRAWLand1000 |
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