14-03-2013, 04:29 PM
(This post was last modified: 14-03-2013, 04:31 PM by Radio Fixer.)
Yes! for a field coil one off you dont need all that sophistication.
If its a series field, with low R and fairly big wire gauge, you can rewind them with just the field coil bobbin (you may have to make cheeks for it *) chucked in a variable speed battery drill, held in a large vice. No need for a traverse mechanisms just lay the wire neat as you can by hand (called scramble winding). Actual resistance can be quite a bit out but should come close if you choose a wire guage close to the original. The new wire can just spool off the top of the reel, in fishing reel fashion (spool on end).
* some coils just have a tube and the wire is held in place by applying glue as it is wound.
For a shunt field something better is needed and I made a simple (well compared to the above) winder. The wire is still traveresd by hand. Wound a field with 40,000 turns and interface transformer of 15,000 turns of fine wire.
More details on request: really busy at the moment ...
cheers Gary
If its a series field, with low R and fairly big wire gauge, you can rewind them with just the field coil bobbin (you may have to make cheeks for it *) chucked in a variable speed battery drill, held in a large vice. No need for a traverse mechanisms just lay the wire neat as you can by hand (called scramble winding). Actual resistance can be quite a bit out but should come close if you choose a wire guage close to the original. The new wire can just spool off the top of the reel, in fishing reel fashion (spool on end).
* some coils just have a tube and the wire is held in place by applying glue as it is wound.
For a shunt field something better is needed and I made a simple (well compared to the above) winder. The wire is still traveresd by hand. Wound a field with 40,000 turns and interface transformer of 15,000 turns of fine wire.
More details on request: really busy at the moment ...
cheers Gary
