You mean like these?cvoinescu wrote:Do not tin them. The solder alloy cold-flows under pressure from the screw, and in short order (months) you'll have a bad joint. A bad contact with a motor wire can destroy a driver (they're well protected against shorts and overloads, but not against disconnection while powered on). Ferrules are the best, bare copper strands twisted together are good, soldered strands are bad. Some cables come with the individual strands tin-plated -- that's okay.
https://www.inventables.com/technologie ... ntact-0100