When I lent my services to a collegue who was working on a film about 6 years ago, I was introduced to the world of cnc. I remember watching this huge machining centre milling out a slab of mdf and turning it into a fantastic set of gears. I knew that it would have taken me hours to achieve the same thing with traditional power tools. I decided then that I would invest in a cnc router for my own business Oxenham Design. At that time I could turn on a computer, but even to check email seemed like a crazy set of operations. I persevered and learned every piece of relevant software I could get my hands on. I am now fortunate enough to be using Vectric's ASPIRE software, and Techno cnc routers, which has helped us to create some amazing projects, both in part, or in full. I thought that this blog would be a great place to share "behind the scenes" adventures with both the software and equipment we use, as well as the projects we build.

Friday, 25 May 2012

gettin ready for Indiana!

I finished the final paint on the Texture Rocks display. Woo-hoo, done! The gear motor works great, and jumps teeth when it's needed. I like it when it all works out!
The other job at hand was a sign I did for another shop 2 months ago. Their client decided they wanted to V-carve the border and text. This meant putting this 2'X3' slab back on the router for additional carving. Not an easy task at this point. I finally got it synced up to the original Aspire file. Not an easy task at all, due to the fact that the file didn't reside at 0-0 originally.
Set up time: 40 min.
Router time: 2min 28 seconds.
head shaking time: still going!

Jody and I are heading off to Indiana to teach at Robert Jones sign camp next week. This is going to be a lot of fun! There are 30 people signed up, and they're ready to learn.
I'm pumped at the opportunity of learning as well. There will be a lot of very experienced people attending.
I plan on posting daily during the camp, with as many pics as I can.
8)
JO


Thursday, 24 May 2012

The Texture Rocks......again

With the Time Machine gone, were back to finishing up some projects before our next set build.
First up was the texture rocks display. It was left at the point where the rock was constructed from fiberglass reinforced bondo over a styrofoam base. I had hogged out all the foam so I would have an empty shell for the motor.
I punched a whole through the top for the butyl tubing that the 1/4-20 rod will run through.

I had a 12v gear-motor set aside for just this gig. It had a rather large pully pressed onto the shaft, and I had no desire to remove it. The plan was to just cut the pulley down to size on the table saw. The pulley has 4 radiating strengthening ribs molded into it. These are what I'm going to use to turn the top portion.
I made a quick coupler from the many offcuts of sintra that were left over from the coils on the time machine. I would have cut them on our Techno cnc, but today was feeling like a lazy day, and I couldn't be bothered to fire it up. You'll notice the grooves in it, these are going to sit over the ribs on the pulley . I also rounded them over so if anyone was to grab the rotating part of the display, it would bump up and jump slots, saving the gear-motor from damage.
I added a piece of 1/8 aluminum flat stock, drilled to fit the existing threaded holes on the gear-motor box.
I tacked it with crazy glue so it wouldn't move. I also drilled some divots in the HDU that will act like a mechanical lock for the reinforced bondo that will eventually hold the flat stock permanently.
The other side is pretty rough due to the styrofoam buck melting a bit with the bondo, so I didn't need to add any divots on that side.

This will definitely hold the flat stock in place!
With the assembly all together and rotating properly, it's of to paint. But not today, I'm going home to finish some 3d modelling.
8)
JO


Tuesday, 22 May 2012

Time's up.......now it's gone :(

Today was the final day for the Time machine. We spent Monday and today doing the patina, and making it a little more aged.



I also picked up the 5 point harness that was in the script. This was very easy to install, mostly because it didn't need to be functional. I'd hate to be ripping through a dimensional worm-hole knowing the only thing holding me in was a few bolts into 1/4" MDF! We also added some copper looking frames around the vents on the pop-outs. This, and the patina, really helped pull it away from looking too Star Trek, and a little more "fabricated"
We grabbed a wiring harness from our Mechanic neighbor. I think it was from a Dodge Neon. We used the connectors as they were, screwed them into the inside, and ran the wires to the many available openings in the structure. It looked pretty complicated. I'd hate to trace the wires if they actually did something!

The control panel was put together from the various odds and ends that seem to be in every box marked "electrical" at the shop. The levers move up and down and most of the switches light up.

All of the lights are 12v automotive products. The centre ring display was made from a piece of 1/8" translucent black acrylic. I reverse cut a simple message from black vinyl, and applied it to the back side. That way when the light is off, you don't see that it says anything.

This was another great build! Thanks again to Chris Crane for getting us to work on this one. He was involved with the shoot for the Death Machine we did last year.
It's always a little sad to see a project come to a close (for the most part) It feels like my kid is moving out or something. Weird.

8)
JO

Sunday, 20 May 2012

Time is running out.

The only trouble with longer than 3 day builds is the fact that I run out of interesting post titles!
The last few days have been spent stripping everything down on the time machine, and painting it. There was a few small things I still had to wrap up.

We got the aging done on the coils and hydraulics. And we got all the hoses and wiring attached to the ring.
We did the inside in a dark asphalt grey colour, with burnished aluminum. The inside I wanted very nondescript. I didn't want to be able to identify the material, but still keep it some form of metal.

One of the colour sample images was steampunk looking. Now steampunk didn't fit the design of the pod very well, so we went with a hammered bronze finish for the main panels, with copper-y coloured port holes.
This has a slight nautical feel, and really looks awesome. Still more to do tomorrow, and Tuesday. We still have to cut the window glazing, and make the control panel. I really dig this machine. They're gonna love it.
JO

Tuesday, 15 May 2012

Gettin Ready to Travel

Another fast paced day getting the time machine fabricated.

We got the door finished and mounted. The pop outs got finished as well. I think we're all done with the MDF! That'll be nice, the stuff gets everywhere. I can also hardly wait to get rid of all the off-cuts, they're really starting to pile up. I think I've used every available corner in the shop to store them.
I really like the way the door swings out with the control panel mount on it. I had to add 2 unplanned aluminum angles to stiffen the door up. They're a little bright until the paint, but they worked like a charm. The door is rock solid! I cut an additional 2 portholes for the requested profile shot, I think it actually looks better from the side with them.
I also cut the coil tops and bottoms out of 1/4" sintra. The spray can is for size, they're quite big!

This is pretty much the configuration of the coils on the concrete. I got the connectors cut from sintra as well. They'll get screwed down to the concrete, with big, thick cables running to the coils. It's gonna come in leaps and bounds now that all the angle figuring out is over!
Tomorrow we're headed out to get all kinds of wire for this. Not real wire mind you, just the jacket. I found a place that stripped all the copper out and throws away the jacket, just what we need for this. It's all about looking the part!
8)
JO



Monday, 14 May 2012

Compound angles suck!

The title says it all! I spent ALL weekend working on the time machine, and it's various bits and pieces. The compound angle drastically increased the time it took, even with small things. They had asked for 3 legs that would "come out" of the pod, in addition to the hydraulic supports. This proved to be more difficult then I thought. I hate having to modify parts that come of the router, but once they've been attached, I didn't have much choice.

This is where I was by the end of today. The legs slide in and out from under the base. They'll get a shiny piece of pipe to look like another hydraulic cylinder. The basic seat frame also got installed. We're going to rubber coat the 3/4" mdf pads so they look like vinyl seat cushions. There will also be 2 more pads that run up the back wall as a seat back. They won't be overly comfy, but they'll certainly look the part.
The circular port hole were an additional request, and they would also like a profile shot of the actor in the pod, so I think this means 2 additional portholes on the back side.

We started the stator coils today as well. These are just 4" PVC pipe wrapped in 1/8" vinyl tubing. We actually need over 200 feet of the stuff, so using real wire was a little cost prohibitive! The coils still need they're top and bottom plates, but they off to a good start.

The concrete ring got it's final colour, and this is where the coils will live approximately. The got sprayed out copper, and when they're all built, we'll wash them down with a dirty wash of paint. they'll look well used for sure.
8)
JO

Thursday, 10 May 2012

The time machine certainly makes the day go fast

I drew up the final pieces for the hydraulic cylinders this morning and got those cut on our Techno cnc. I had to re-cut the centre reducers, as I got all confused about which circles got pocketed, and which circles got cut right through for the pipe.
 I machined all of these pieces from 3/4" pvc sheet.  As both the ABS pipe, and the PVC pipe are so out of round, it meant leaving a pretty sloppy tolerance on the reducers. But they worked out. I chem-welded all the parts, then drilled them out for additional screws, just so I didn't have to rely on the glue alone.

I've got lots of 1/2" extruded acrylic rod, so I used some of that to make the pins that will hold the cylinders to the arms that "support" the pod. I just received word today that they want some kind of retractable looking support legs on the pod as well. This is going to require some imagination, as we are getting a little crowded at the bottom now!
These look great! With some paint, chrome and hydraulic lines, they'll be quit convincing. When I was drawing up the files, I put in 1/4" holes for the pivot points (even though they don't move) that we will run a bolt through. I also added  additional 1/4" locating holes throughout the various parts, including the concrete curb. This let me assemble them all without having the pod built for the angles. Everything lines up perfectly.

I also got the lower section of the pod framed up as well. I added mitered strips up all the main support frames that will let me attach the 1/4" wall panels to.

 Jody made a great start on the concrete curb painting. Those should be finished up by tomorrow. I'm hoping to have all the fabrication done by Sunday, this will leave next week for paint and gak! I really want to make some large stator coils that mount to the concrete, with big scary looking power hook-ups. I want to be very, very afraid of being electrocuted when it's done!
8)
JO