Yes, the whole point of this is to be able to develop a HandCrank process/mechanism that will work on non-bossed (or offset bossed) machines.
I think that the most probable way to do this is to mimic the singer RARE device at the beginning of this thread, however nothing is clear yet. NOTE: It works by clamping around the shaft behind the handwheel. and is not connected to the head at all.
The details we have so far are:
1. Some machines have bosses for motors
2. Some machines have off-set bosses for motors
3. Some machines have NO bosses for motors
4. Machines have different diameter handwheels
5. Incorporating bobbin winders is important (if possible)
6. Original singer handcranks have mounting screws on the bottom
7. (in theory) New clone handcranks are cast as one piece.(crank and arm) (no photos yet...)
8. All machines have a shaft that is central to the handwheel....
I am planning to keep my thoughts mostly to myself until I have most of the details sorted out but I'll say that my idea includes inspiration from the "jackrabbit" (motor on spring-loaded base to contact treadles and run them as electrics) as well.
Nancy, can you shoot me a photo of the boss area on your New Home?
Last edited by SteveH; 01-08-2013 at 08:42 AM.