Recent content by SailplaneDriver

Does anyone here use the PA screen set for Mach3? I'm trying to figure out how to use the auto tool height and probing scripts. I can't figure out where the probe diameter and tool setting probe height are stored.

USA electrical code allows multiple 15A outlets (one duplex outlet is a multiple outlet) on a 20A circuit. One simplex 15A outlet must go on a 15A circuit.

Check Precision Mathews. They have some "better" quality controlled 4" thru 6" Chinese clones. I have a 5" and it is good for the price.

I'm working on building a Webster. The drawing note that rings can be purchased from Otto Gas Engine Works but I've been unable to locate them on the web. Anyone know if they are still in business? If not, I will try to make my own. However, I don't see a thickness listed in the drawings. The...

That is what is used to make transformers and motors. It is laminated typically with shelac coating between the layers to minimize eddy current losses. It would be a lot of work to punch out the laminations for something like this unless you were going to go into production.

OK, that is a really good system. You did not waste your weekends.

There is a left hand and right hand rule. They are not interchangeable.

Damn. You guys just put me down the rabbit hole of Circularity vs. Roundness.

Thanks Brian. I was wondering what people did to keep the center from slipping. I was considering a shrink fit but wasn't confident it would have sufficient holding power for the cyclical loads.

I did some calcs on the bronze ring vs. the design flywheel. The moment of inertia of the bronze ring will be about 4 times that of the original design. That sounds a bit on the high side. I think I'll dig around some more and see if I can scrounge up something else. Maybe a trip to WalMart and...

I'm getting ready to start on a Webster and I hope to tap into the experience of others who have built one and have much more experience that I do. I don't have any 3.75" steel or cast iron laying around for the flywheel but I do have a beautiful bronze ring 4.75"OD, 3"ID, .866 thick. It's a...

My answer is correct. Here is the formula from Alternating Current Machines by Puchstein, Lloyd and Conrad first published in 1936. This is the 1954 edition. The output frequency is inversly proportional to the number of poles in a generator or alternator. Same for the RPM. Now think of it...

Output frequency will be Number of Magnetic poles times RPM divided by 120. For a 16 pole machine running at 1000 RPM you will get 133 Hertz output.

If you are in the US, both Grainger and McMaster Carr have 50 mm OD o-rings in various materials and thicknesses. Some are even available on Amazon.

Out by Redmond, WA for me. We should have a PNW get together - well, when things calm down.