Hey Jan, I forgot to mention that I also have Malcom Wilds book. You are right in saying that I have interest in this BUT I wonder if I am smart enough 🙄 I do believe that understanding or at least being familiar with the information will only benefit. Your posting the math and going thru it like you did, to me, is a good way to teach yourself, sort of like taking a exam, forcing you to really go thru it. At any rate, what I am thinking…..ooohhhh boy 🙄 is being self sufficient in repairs, producing a part or the whole timepiece, this is where we need to go, (especially if there is no other reference to have), yes I could buy all the cutters I need but then I would have to sell the milling machine to pay for the cutters, then what?
Maybe Bob or Paul would buy us all a complete set of cycloidial cutters.
O.K. here is the idea. using a shadow graph or a optical comparator, knowing the amount of magnification, I can take the measurements from Wilds charts and make a drawing of the tooth form. My old comparator has a magnification of 20, in theory I multiply all the measurements by 20 and make a drawing. Putting the drawing on the viewing screen and grind my tool, holding it on the table for magnification, I should be able to get my cutter pretty close…..Right…I have not tried it yet, maybe tonight.
Once I figure out how I get these profiles the next dilemma is the process of making the cutter. For brass wheels a fly cutter (not too difficult), for steel pinions a multi tooth cutter (a bit more involved, probably like the 4 tooth cutter Wild has in his book). Have a great day, William
a lovely surprise turns up..