Editing Machine head (section)

== Resistance to usage ==
Musicians playing certain instruments, most notably the violin family, (excepting the double bass) remain resistant to the use of machine heads, insisting on the continued use of friction pegs. Such factors as appearance, weight, tradition and simplicity are cited as justification, despite issues with friction pegs slipping out of tune, coming loose or jamming. In the early 2000s, tuning pegs were introduced with planetary gearing inside a friction-peg shaped casing that can be fitted to an instrument without physical alterations. While reasonably well-accepted, planetary pegs can make string changes more time-consuming.