The other problem with a lantern gear is that you are trying to fit the gear into a tight space (the front and rear sliders on the 4X5) and then you have the problem of what to do with the sides of the lantern gear since you'll want the rack inlayed into the optical bench. Of course, you can create reliefs on each side of the teeth but the you've taken away some of the support you get for the teeth by inlaying in the first place.
Bob, I like the idea of laminated wood, in fact, Wayne Westphale did just that to make the gears for the clocks he builds. I've heard the suggestion that the inside layers of the gear should be a Baltic Birch lamination since that wood is very stable but Wayne has used just about any good hardwood laminated as you suggested (or so he relates in his articles). Dan ----- Original Message ----- From: "Robert Mueller" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Saturday, October 27, 2001 7:55 AM Subject: Re: [Cameramakers] Rack and pinion template system > You are right, and not quite so right! The trouble is that the correct > rack for a lantern pinion is a cycloid but an involute rack has > straight-sided teeth, and there are a lot to cut. Conversely, A lantern > pinion might just be the way to get the strength in the pinion teeth. > > Bob > > At 15:53 25.10.01 -0400, you wrote: > >I have made clocks and wonder why the pinion gear when a lantern gear is > >so much easier to make. > >Jim Ketcheson > > > >Matt Mengel wrote: > > > >>Hey all, > >> I am a machinist, and I agree that a cutter for a > >>router would be the easiest way to cut the teeth for > >>the rack. > > > > > >_______________________________________________ > >Cameramakers mailing list > >[EMAIL PROTECTED] > >http://rmp.opusis.com/mailman/listinfo/cameramakers > > _______________________________________________ > Cameramakers mailing list > [EMAIL PROTECTED] > http://rmp.opusis.com/mailman/listinfo/cameramakers > _______________________________________________ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
