stephenc47
MVI_3523
This video shows that when film is loaded and driving the film "sprocket", the upper film shaft gear rotates at a slower rate compared to the black shutter cocking gear. This allows the black shutter cocking gear to complete it's cycle first and pause (within the toothless section of it's cog profile) while the upper film shaft gear continues to rotate, complete its cycle and release the shutter button lock.
Note1: to show the film transporting with the camera back off, a screw was used to hold the transfer gear locking lever out of the way.
Note2: the black shutter cocking gear was not engaged with the lower film shaft gear in the first windon part of this video. So it was not rotating during the first windon. This might be caused by a weak tension spring. At the completion of windon, a lever is tripped that releases the black shutter cocking gear and it's tension spring is supposed to pull it counter clockwise to engage with the lower film shaft gear.
Note3:You can see at the end of the first windon when the shutter button lock is released, a secondary lever being released freeing the black shutter cocking gear to rotate counter clockwise into engagement under spring tension. Not sure why the black shutter cocking gear wasn't engaged at the start of the video, but it has behaved itself since.
MVI_3523
This video shows that when film is loaded and driving the film "sprocket", the upper film shaft gear rotates at a slower rate compared to the black shutter cocking gear. This allows the black shutter cocking gear to complete it's cycle first and pause (within the toothless section of it's cog profile) while the upper film shaft gear continues to rotate, complete its cycle and release the shutter button lock.
Note1: to show the film transporting with the camera back off, a screw was used to hold the transfer gear locking lever out of the way.
Note2: the black shutter cocking gear was not engaged with the lower film shaft gear in the first windon part of this video. So it was not rotating during the first windon. This might be caused by a weak tension spring. At the completion of windon, a lever is tripped that releases the black shutter cocking gear and it's tension spring is supposed to pull it counter clockwise to engage with the lower film shaft gear.
Note3:You can see at the end of the first windon when the shutter button lock is released, a secondary lever being released freeing the black shutter cocking gear to rotate counter clockwise into engagement under spring tension. Not sure why the black shutter cocking gear wasn't engaged at the start of the video, but it has behaved itself since.