Archived posting to the Leica Users Group, 2003/01/22
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]The Winder/Motor-M has a high power circuit and a low power circuit. When the shutter is released, the wind mechanism is released and the high power circuit engages and winds the camera. When the camera is finished winding the wind mechanism locks (the coupling stops rotating) and the Winder/Motor switches to the low power circuit until the wind mechanism is free to turn again. On the Winder-M the motor mounts in a craddle that allows the motor to rotate slightly when it under high load (wind mechanism locked). This rotation is used to switch between the high and low power circuits. It is frequently out of adjustment and knocks the stuffing out of the sophisticated damping mechanism (a bit of high density foam) and the winder literally jumps in your hand. This quickly tires the foam and, in addition to the jumping, the winder now starts clanking somewhat like a heavy machine gun. It is easy to adjust the Winder so that it is quiet and hardly even vibrates at all; however, I have NEVER found one adjust that way. They ALL have required readjustment. I do not know what switches the Motor-M from high to low power. As long as it works and stays quiet, who cares? The problems arise when the wind mechanism is released before the shutter has finished its cycle. THIS IS NOT UNCOMMON and whether you use a Winder-M or a Motor-M makes NO difference. The greatest risk of the this happening is when you are using the slow speeds below 1/50. Above that the shutter USUALLY (I have seen problems then too) has time to complete its cycle no matter how much of a hurry the Winder/Motor is in. So... DO NOT SHOOT CONTINUOUSLY WHEN USING THE SLOWER SPEEDS John Collier On Tuesday, January 21, 2003, at 05:03 PM, Austin Franklin wrote: > I believe the M motor's operation has to do with the way it tells that > the > shot has been fired. I THINK it keeps a little tension on the drive > mechanism, and when the shutter releases, the tension is then > "decreased" > (probably entirely removed, save friction), and the motor senses that > and > winds a prescribed "distance", which seems to be precisely 360... I > wonder > if it has enough of a delay for the slow shutter speeds. I'll see > what the > manual for it says. - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html