Official Answer
Answer
Nan asanble segondè-presizyon tankou lojman lantiy optik oswa BEARINGS motè EV, tolerans pile nan lojman an ak konpozan kwazman ka depase ranje chaj la vle nan sezon prentan an. Shims yo itilize pou ajiste wotè travay $L_w$. Since the load $P$ is a function of $(L_f - L_w)$, a small variation in $L_w$ can lead to a large variation in $P$ if the spring rate $k$ is high. Hardened steel shims should be used to provide a flat, parallel surface for the spring to bear against, preventing the wave crests from digging into softer aluminum or plastic housings, which would effectively change the free height and the resulting load.
