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The Kinematics of a Harmonic Drive permit a mesh to utilize both sides of the tooth's flank without the adverse effects an involute gear would experience under the same condition.

He needs a level shifter from what I understand. OP has a 24v proximity switch that has a pnp output. Use a resistor network...6.2k & 1.6k.

Well, I just couldn't help myself....

It depends on a number of things, how thick the scale is. It's composition and defects. If it is too slow, you can heat the solution. Increasing the acid concentration won't speed it up much. Heat is...

32% is too strong to use so you would have to dilute it. Which will give more solution for your buck...errr...pound.

They do sell 8% already in a bottle so you wouldn't have to dilute it.

Use HCl, it is easier to find. It is used in masonary work, to etch & clean concrete. In the US, they call it Muriatic Acid, I don't know if it is the same in the UK.

What you are trying to do is called "Pickling", chemically removing mill scale. The most popular chemistries to do this are hydrochloric or sulfuric acid. Prepare a bath with 8-10% HCl and water and...

Chaulk up another one for southern NH, south of Manchester specifically. Already started on a servo machine that will mill Al, plasma and wield the gas hatchet....

There is a much higher resolution timer available in the windows kernel. However, the overhead is in the order of microseconds not nanoseconds like you want. It's an API function....I'll forward you...

yes, it's 5.08 turns per inch to be exact.

5 turns per inch assuming it is a single start screw.

I noticed that most of the resistors are metal film 1%. Would be possible to substitute your standard 5% carbon film for the metal films?

I'm having a hard time finding some of the resistors...

In MasterCAM you are going to have to import your autocad dwg, then turn those arcs into a surface feature. The you machine it by using a suface toolpath. MasterCAM's help library is pretty good if...

If anyone runs into heat problems...I work for a heatsink manufacturer and can supply cooling solutions. PM me if you need a heatsink.

Doesn't work on my machines...it won't use my work offset.

So you mean to tell me that the 2 4020's I have w/ metric ballscrews are capable of 700ipm rapids? I take that increasing the rapids won't wear the machine faster or will it if so what is a...

Engine Builder's Handbook is one I like
Engine Blueprinting is also a good book and reference.

David Vizard has written some good books on every aspect of a motor. ie rotating assembly, cam &...