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Posts from the ‘Everything Else’ Category

20
May

DIY Hot Knife Gun

I needed a hot knife to cut some polypro webbing. Looked on Ebay, couldn’t find anything for a good price. The target was VERY LOW!!

SO, yep … I made my own!

I went to Harbor Freight and grabbed a 200W soldering gun, for about $13.

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I had some 1/8″ brass rod laying around. Where the soldering tip would go, I used a 1/8″ drill to drill out the contacts. So the brass rod would fit inside them. The OEM tip was much smaller then 1/8″.

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Bent the brass rod into a basic U shape, to get the width I wanted for the cut.

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Then bent the legs back to match the opening of the soldering gun.

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Here was the tricky part! I smashed it flat on a vise with a hammer. But it didn’t work. The brass fell apart. So I made a new one. This time I put the cutter in the gun, pulled the trigger, heated up the brass. Then smashed it flat. IT WORKED!

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This thing works GREAT!! I cut on a piece of glass to keep from melting the table.

7
Jan

Birth of a 3D printer – Part2

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This is the CPU mounted on the bottom of the printer.

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The hot bed is installed. The hot bed keeps the parts inplace while printing.

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Mocking up the towers before making the wooden frame.

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ALMOST DONE!!

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First running of the firmware for the CPU.

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I had to modify the switches to work with my printed parts.

Its all coming along nicely!!

 

28
Nov

Birth of a 3D printer – Part 1

I have been looking into DIY 3d printing for some time now. I have even went as far as to gather a few parts here and there over the past year. But now I have a real need for one, so I have decided to pull the trigger and get it done!

Originally I was looking into making a ORD BOT style of printer. The cost of the wheel bearings and the MakerSlide t-slot materials was going to cost to much. That’s why I have been putting off the project for this long.

In mid 2012 the Rostock Delta Printer was developed. http://reprap.org/wiki/Rostock The printer featured high speed printing and a very low part count for building it, lower then ORD BOT. Thus I decided to make the Rostock instead.

To save on the overall cost, I sourced all the parts over the internet, rather then buying a complete kit. The only downside to this is that all the part will show up over a 2 week period, and not all at once. I will show case the build in parts, starting with  the parts I have on hand.

 

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I ordered the main parts kit on EBay.
I have already installed the metric screws and one of the motors.

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I went with the 8MM sliding bearings, but instead of using precision rod, I used 5/16″ cold rolled rod.
The kit came with a printed Nylon bearing. But it seemed to bind up when it was sliding.

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The yoke ends need a rod to connect the 2 together. Some people use wooden dowels, or fiberglass rods from the RC store. I used some 1/4″ aluminum rod I had laying around. It was to big to fit in the yoke, so I had to turn down each end of the rod to fit it on to the yokes.

 

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After gluing the rods to the yokes, I needed a way to keep ALL the lengths the same while it was drying. I layed out some nails on a board, to keep them inline.

 

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Since I am useing printed parts, the holes are a little off form the true size. I dont have metric drill bits, so i can up with a quick fix. Take the metric screw i am going to use, chuck it up in my drill. Put a washer on it, and drill it into the hole. Let the threads do the cutting. It worked great!

 

 

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After looking at the rods, having the plane aluminum look, and pure board-um, I thought it wold be cool to buff them to make them shine. This should also help reduce wind resistance. LOL

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I should have done this BEFORE gluing the yoke ends on -__-

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The Rostock is belt driven. I needed a idler pulley for the take up of the belt. I made one from a bearing and a fender washer. I chucked it up in my lathe, and turned down the face of the washer to create the step for the bearing to move.

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Here is the step in the washer.

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The electronics kit I ordered did not come with ANY instructions, not even on their site :/
So in an effort to figure it out myself, I toasted the 5v regulator on the Arduino 2560 board, you know… the board that controls the entire printer -__-
I had to order a new one form Digikey, but I did learn how to look up the limit switches.

 

 

4
Feb

DIY Rugs … for less then $20!

We were moving to a new home, and the new place had ALL tile floors. We needed some rugs to deaden the echo. I went to Lowes to look for some. The avrage price for a 8’x10′ area rug was about $80. That was too much!

I then noticed a remnant of some nice Berber  hidden under the full rolls of carpet. I asked the worker how much it was. The price tag said $30, but he could let me have it for $15!! WIN!!

The piece was 12’x6′. So I cut off 2′ from the 12′ side, making a 10’x6′ and a 2’x6’… Yes I got 2 rugs out of it!

I had some tan 1″ nylon webbing, and some tan #69 nylon thread. I used my Yamata sewing machine and a binding feeder and sewed on a edge for the carpet, thus making it a rug! The webbing was on a roll, so it was sewn on in one continuous piece on the edge of the carpet.

Had a little trouble feeding it on my machine, it was big and very heavy. So a few spots got a little wonky.  But over all it turned out great!

3
Jul

DIY Cheap “Macro” Cell Phone Photography

I needed to show my boss a component that was fried on a board. He is an elderly gentleman, so his eye site is not so good. So I thought I would take a photo of the bad part and show him on the large display on my computer. All I had to take the photo was my cell phone. I thought to myself, what if I put my eye loop up to the lens and use it to magnified the image.  Bingo!

Now the trick is to zoom in on your camera and put the loop over the lens, more zoom means more macro, but its gets a little grainy.

A set of eye loops at Harbor Fright is about $5.

8
Feb

Folding Beer Pong Table

My wife want to make me a beer pong table for Christmas one year. Bless  her heart! But it didn’t turn out so well. So I took her idea, and made my own :)

Its “regulation” size. Folds in the middle and has folding legs. We are going to cover it with all kinds of beer brand stickers.

Tried it out on new years eve 2012!!! Worked like a champ!!

9
Nov

Lego Man Halloween Costume

This is a home made costume I made for my son.  My wife was searching for ideas for him and can across some examples, he then demanded that he wanted to be a Lego Man.

The head is some concrete tube form. The body is just a big card board box. The hands are some PVC pipe. The very top of the head is a tuna can. LOL

My wife had the kids stand out side to get some photos. We lived on a busy road. Almost everyone driving by was honking and waving at my son!

19
Nov

Tubing Bend Calculation Tool Made in Flash

I own a Jeep 1997 TJ. I wanted to make a tire carrier/bumper for it. So I found a web site that sells pre-bent tubing for fabrication. I emailed the guy and asked if he can do custom parts, he said with-in reason. But went on to say that we wished his web site could take a custom orders and quote the cost of the part. BINGO! I said I could make a Flash based tool to calculate bend angle, length and cost. So here is the W.I.P.:

Here is the link.