I was wondering if someone could help me design a fixture that breaks down 1kg spools into smaller coils with a 6 inch inner diameter. I made a tool to do it by hand but something automated with a stepper motor would be so nice.
I believe a stepper, a cheap steperdriver (i.e. stepstick) and a pulse generator (maybe cheap µC) can do it.
Not knowing your manual version you might need a wheels or so to connect the stepper.
If you want a precise length respooled I would use a “slipping belt” for the target spool, winding up faster than the actual “tracking” from the source spool. Something similar used in the old cassettes recorders.
All the Best
I finished my first prototype: https://www.youtube.com/watch?v=WGOxOEAFI0Q
I need to add drag to the spool so there is more tension in the line. I am also raising the height of the first idler wheel.
After more testing I found it works perfectly fine without the idler wheels!
that looks very good.
Now the next step is measuring the length
All the Best
You could probably adapt a measuring wheel to do that. This is only $10 and uses a flywheel to measure up to 1000 feet.
Well I know the diameter of my coiler so x amount of rotations equalys y amount of length