GreenTwin's latest activity
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GreenTwin replied to the thread Shelf Pet models?.I have been working on my own Frisco Standard single cylinder design, and hope to cast one of those in the future. . -
GreenTwin replied to the thread Shelf Pet models?.I looked at their website recently, about a month ago, and the Frisco Standard twin was available. Someone said they are having website...
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GreenTwin replied to the thread Latest project Transistor VTVM build.When I started in college, the oscilloscopes in the labs were all tube-type, the labs were full of analog computers, and there was a...
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My wife said I need a indoor hobby. So I designed and built a transistor vacuum tube voltmeter. Here is a photo of finished vtvm and...
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GreenTwin replied to the thread Engine Design basic questions.I use a couple of benchmarks when deciding what size engine to design or build. I have a 12" lathe, so that limits the maximum flywheel...
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Hi All, Being a newly minted engineer (as in Diploma not Engineer with a Degree), obviously I have a head full of knowledge and no real...
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Oil pan casting had some sand pullout due to not enough tamping and not enough sanding of pattern.
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A 3/4" disk of 4-1/2" diameter Stressproof arrived from Speedy Metals in time to start work on the flywheel/ring gear. Its sawed ends...
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GreenTwin reacted to Brian Rupnow's post in the thread Cutting a cam with radiused flanks with
Like.
I've been out sick for a month. Very bad back pain and arthritis. Yesterday, I felt like designing something for the first time in a... -
GreenTwin reacted to Brian Rupnow's post in the thread Cutting a cam with radiused flanks with Like.
Shown here are the four stages of cutting a cam. In stage 1, the inner diameter is based on the final bore for the center hole and the...
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GreenTwin reacted to Brian Rupnow's post in the thread Cutting a cam with radiused flanks with Like.
In step two (This is where we cut the radiused flanks) the cam is fixtured in a vice on the milling machine table, (remember, we haven't...
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GreenTwin reacted to Brian Rupnow's post in the thread Cutting a cam with radiused flanks with Like.
Okay, now that the curved flanks have been cut, we have to cut away the remaining metal at the bottom of the flanks. This will have to...
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GreenTwin reacted to Brian Rupnow's post in the thread Cutting a cam with radiused flanks with Like.
If we have lived right, this is what we end up with, a cam with curved flanks. Notice that there are sharp corners left at the top of...
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GreenTwin reacted to Brian Rupnow's post in the thread Cutting a cam with radiused flanks with Like.
This is a 3D model of my prototype cam flank cutter that I designed. Note that I have also shown the cam in place. (the cam is held...
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GreenTwin reacted to Brian Rupnow's post in the thread Cutting a cam with radiused flanks with Like.
First, the main body of the prototype cutter is turned on a lathe. The design shows it made from one piece of steel, but I made it from...
