Slothfurnace's ROTJ Luke Saber - Crystal Chamber, Thin Neck, Detachable Blade

[slothfurnace]

It is time now to post this saber, I'll be bombing this thread with posts till I get the bulk of the build log in here, but this is a Return Of The Jedi Luke Saber, with crystal chamber, thin neck, and detachable blade.



My initial sketch of the project, I *think* I can get it all in there.



I begin with the key to the project, the collapsable grip section, first I must replicate this part, in hollow 1.5 inch diameter aluminum.



After I got my first groove cut, I measured out 0.32 inches for each successive groove, marked it lightly with my lathe, on each side of the groove, thereby giving me a place to "color in the lines" so to speak, and to take the groove down to a set depth on each ring.



Here are the grooves cut, I have a bit of chatter in one or two, but that's easily solved with some sandpaper. The grooves will be painted in the end, so it won't matter too much. I also made sure to use a slightly more rounded tip on my cutting bit so as to let the inner diameter inside the grooves leave enough material to be strong, with the grip section being hollowed out to one inch.



Here I turned the grip section backwards to cut the smaller diameter behind the grooves. This will fit inside the main rear grip section underneath the control box, and be cut so that I have a retaining ring to let my rods go through for the collapsing bit.

[slothfurnace]

I got one of my first crystal candidates in, and test lit it with the green high power LED. It transmits light very well, much better than the tourmaline I had tried earlier. This is a double terminated clear quartz.



Playing around with greebles for the crystal chamber. I love this brass air brake ferrule.



At this point, I begin the LED string. The LEDs I am using are extremely bright, can put out from 7200 mcd to 21000 mcd at 525 nm. That's MUCH brighter than anything I have used to date. To begin the process, I use my flat needlenose pliers to fold out the leads so that they are straight out, and as flat to the bottom of the LED case as I can get them.



Now, I use my regular needlenose pliers as both a spacer, and to hold it while I bend each lead back down. I try to make as close to a 90 degree sharp angle as I can, while holding the lead in the same spot each time, as the pliers are tapered.



Here, I have my LEDs bent and prepped for the next step. Consistency here is key, as it will make a big difference in the straightness of the LED string.



Next step, folding over. I use a scrap piece of shelving track for this, so my bends are the right angle and length every time. Again, consistency is key here. It won't be perfect, but the closer to uniform you get, the better.



Always make doubly sure that the bends here go the right way. I always point the "arrow" part of the LED up when I bend, so that the positive and negative leads always go the right direction. Saves me from having one reversed.



Now that they all are bent, it is time to assemble them together. This is one of the more tedious steps, but it will be worth it when they come on for the first time.



Assembly, here I make sure my leads are all correct, positive down one side, and negatives down the other. I will assemble six sets of 12 to 14 LEDs like this, depending on length of blade. Pass one LED's leads through the shoulders, and bend up and crimp with needlenose pliers.



This is a section of 12 LEDs. This will go on the rest of the strip I already have made after soldering and trimming.



To solder, I have a little anvil with a magnet on top, this keeps my LED string section in place while I solder, and the magnet is also handy for when I trim the extra leads off the sides. The magnet collects the leads, instead of them getting in my carpet, and in my foot.



A completed section, soldered, trimmed, ready to join the others.



Here I have several sections placed into the diffuser foam tube, and test lit. It is unbelievably bright, pictures don't do it justice. It hurts to look at it without the diffuser foam.

[slothfurnace]

Here's today's work...



So now it's come time to put one of my theories to the test. I think that if I cut the long end of the drilled portion of the grip off, and use that as a template to transfer my hole pattern to the other pieces, I will be able to line up my holes straight enough so that the rods do not bind up when collapsing the chamber. In the pic above, you can see the indentations of the drill on the main body where I passed the drill bit through the template.



Here is the template cut off the other grip section, flattened and set on top of my main handle. I cut an interior step to let this template fit snug into it, and took it to the drill press to transfer my holes.



I'd say it worked! The rods only fit one way, because the holes are *slightly* imperfectly spaced, but they are STRAIGHT. Which is what I need for me to be able to open the crystal chamber.



Like so. I will have about this much room to open the chamber, and the pommel/battery pack section will go behind this main body section to finish out the length of the handle.



I have about a one inch diameter by 3 inch long section to fill up with crystal chambery goodness.



Like I said earlier, I'll mace a pommel/speaker housing/battery pack section to cover those back rods and finish out the length of the saber.

[slothfurnace]

Did a little work on the crystal chamber tonight, the crystal mount anyway... I fashioned this out of a scrap piece of brass, something out of an old dentist's tool I had laying around. Polished the outside, cut a ring for the LED holes and crystal screws, and a groove for floating the positive lead ring.



Right now, it grounds out against the whole unit, but I'll isolate that soon. In the meantime, here she is lit up. VERY bright, very green!



This is the way the leads connect to the positive and negative floating rings behind the crystal mount. There's enough space here to isolate them, and they look nice...



A little more work on the crystal chamber, now I have the correct three way radially symmetrical support rods, instead of the 4 way I had earier. These support rods go through two identical harddrive motor mount housings, and I shaved one down to fit inside the one inch diameter hole in the foreward grip, the other is notched to let the forward grip posts slide through.



I'll be replicating my radiator section from the graflex on this saber, only much smaller.. instead of it being based on 6-32 rods and nuts, it will be based on 4-40.

[slothfurnace]

At this point, I decided to work on the radiator section, recreating that part from my graflex saber in this one, but at a much smaller scale. Previously, I had bolted the brass sheets to a block of wood and cut them down to size on the standup belt sander. This time I wanted an easier way to do it, so I cut, drilled and bolted the one inch square sheets to the top end of my crystal chamber, using the same support rods.



After using the lathe to turn them down to the right size, and dropping off a few that were bent, I was left with 6 or 7 that I liked, and then drilled them out hollow. This was much easier on the lathe than what I did previously.



Deciding to keep five of them, I spaced them out and sanded the sharp edges down on the outside and inside.



After spinning them to get nice radial sanded texture on the faces, I then used the dremel to cut away the section I didn't need, leaving the spot for the wire conduit on one side.



Here it is lit up, you can see the radiator sections below the crystal. I have yet to make the wire conduit section or hide the threaded rods.



I might go back and rewire my LEDs, I have a few revisions I'd like to do...

[slothfurnace]

Remade the LED array, and lathed away some of the brass part of the mount. It's much cleaner now.



Tonight I spent a few hours machining part of the neck. This plug will fit into the forward grip, and be interchangeable between an emitter/neck with blade, and one without.



The slightly raised lip fits snug into a tiny bevel in the shoulder of the forward grip. A black setscrew will secure this, and be well hidden in the groove after it's painted. The copper section above this will cover the long tube.

[slothfurnace]

The copper collar that goes on the top section of the neck, I had to cut off with a hacksaw from the main stock, so I wasted as little copper as possible. Also, I hate this particular alloy of copper, as it's extremely difficult to machine. It work hardens pretty fast, and gets gummy.



After shaving off the hacksaw side, polishing and slipping it on to the neck



Now I need to hollow out the pommel for the speaker. To do this, I drilled a half inch pilot hole, then went in with my 7/8 bit. Slowly, because it's a bit dull, and it chatters some.



After boring out room for the speaker, the last bit of hollow section will be the resonance chamber. Hopefully it will sound ok, I can adjust a bit if I need to. Also, I drilled out the hole for the sound to escape.



The speaker fits just fine. I'll machine a tube to go from the inside of the pommel, holding the speaker in, through into the inside of the main handle section. This will also serve as my base for the latch.



Here I am starting the emitter. I have a couple of emitters for reference, one from Rylo, one from the RPF, and I am sort of averaging those together for mine.



The bottom section machined, I'll drill this for a threaded 3/8 hollow rod, and flip it over to do the top section.



However, I couldn't resist putting the Rylo emitter on just for grins. It's really coming together!

[slothfurnace]

Whew, got my emitter machined, and the pommel on there, still have a ways to go.

I got a lot done today, though it may not look like it...



Set the recharge port today in the chamber top, and put three setscrews in to secure the harddrive motor case that is the base of my crystal chamber. That outer cylinder with the setscrews fits inside the main handle, and lets the rods go through to open and close the chamber.



This is the only place I could think to install the recharge port. Once the chamber is open, you'll be able to plug it in to charge the saber. I will probably shorten the chamber a bit, depending on how much length on my support rods I end up with.

[slothfurnace]

Today's work involved the blade anchor plug that will serve as the inside of the emitter, holding the blade secure against the emitter shell. It was kind of dark in my office, so not so great a picture, let me turn on a light so you can see it better...



Oh yeah, we have ignition! The small bit of blade tube visible behind the emitter shell is very much like my Obi. I do this because it looks cool, and it gives me the most surface area inside the shell to anchor the blade.



It was so bright, it was messing with my camera, so the pic doesn't quite do it justice. I'll be finishing off the blade shortly, and beginning my wiring harnesses once I finish the two neck sections.

[slothfurnace]

Heh, the wife says this one is TOO bright, blinding even. I might just dim it down a tad.



Getting the wiring all threaded through my tubing, I have three wires running through the copper to the recharge port. In the brass tube just behind the threaded support rod, I have a single white wire for the positive feed for the blade, surrounded by seven smaller ribbon cable wires to handle the grounding sections and the clash sensor. The wires for the crystal chamber are already threaded through the base.



So here's what I am thinking for the control box. Aluminum blocks for the two switches, bolted and hinged as illustrated,

rear for activation, fore for clash trigger?

Also I have a trick up my sleeve for the two triangular LEDS. Not pictured here, the pololu latching switchboard also fits in there.