Re: [Cameramakers] Enlarger lights, focusing motors, books etc...
In short, the small, inexpensive, gear-reduced, reversible, 3-wire capacitor run motor is by far the simplest way to go. Have fun, bye, sid. Perhaps, but almost as easy is a DC motor with a gearbox. The beauty of it is the ease of reversal (reverse polarity of power) and the ease of speed control, so the last bit of adjustment can be done at a small speed (maybe with a potentiometer to vary the speed.) Bob ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
[Cameramakers] Enlarger lights, focusing motors, books etc...
1. Enlarger lights. I just bought a 3200 degree Kelbin lamp for $10 for a 500 watt rectangular work light I bought at home depot. Got the bulb at Bulbtronics. Works great. This would make a very nice light source for a diffuser enlarger. 2. Books to the VC book I would strongly recomend Ctein's after Exposure book now in its second edition. It has great chapters on enlarger lens tests, why camera lens aren't good enlarger lenses. Printing with variable Contrast papers and the lack of archival-ness of RC paper. He's a physicist. Perfect for the gearhead in us all. The scariest part of the book is how paper responds differently than the eye and how grain focusers 'don't really work'! 3 btw the flashing LED button red light I put in two 'dead' batteries from my Nikon F3 in September are still flashing. I've placed the light in my truck where it looks as though I have an expensive alarm system. I'm not sure if LEDs are ready for enlarger-big time but they sure are efficient. 4. Motor focusing control. I doubt that you want a capacitor start motor for a focusing control. Capacitors are used to give a motor under load a 'kick' start. This will result in jumps instead of fine controlled focusing. The best 'motor' for focusing is probably a Selsin motor. What you would have is two motors connected by a cable of wires. One would be hooked up to the focus stage the other you would hold in your hand. They are locked electrically-such that when you turn the one in your hand 10 degrees the other one will also turn ten degrees. No backlash. Should be able to find small Selsin motors as surplus. Buy them in pairs. 5. If you still want to wire that capacitor motor. WW Grainger is the easiest source for capacitors and wiring diagrams. Grainger also sells small cheap $30~~ gear motors that are geared down to 1, 2, 20, 25 rpm. These should also work. Will ___ Cameramakers mailing list [EMAIL PROTECTED] http://rmp.opusis.com/mailman/listinfo/cameramakers
