{"id":208,"date":"2026-10-17T16:51:20","date_gmt":"2026-10-17T16:51:20","guid":{"rendered":"https:\/\/galosom.com\/vn\/?p=208"},"modified":"2026-10-18T11:42:21","modified_gmt":"2026-10-18T11:42:21","slug":"mechanical-watch-crown-spins-freely","status":"publish","type":"post","link":"https:\/\/galosom.com\/vn\/2026\/10\/17\/mechanical-watch-crown-spins-freely\/","title":{"rendered":"N\u00fam ch\u1ec9nh gi\u1edd c\u1ee7a \u0111\u1ed3ng h\u1ed3 c\u01a1 xoay t\u1ef1 do? \u0110i\u1ec1u g\u00ec l\u00e0 b\u00ecnh th\u01b0\u1eddng v\u00e0 khi n\u00e0o c\u1ea7n s\u1eeda ch\u1eefa"},"content":{"rendered":"

\"Mechanical<\/p>\n

N\u00fam v\u1eb7n c\u1ee7a \u0111\u1ed3ng h\u1ed3 c\u01a1 quay tr\u01a1n c\u00f3 th\u1ec3 khi\u1ebfn qu\u00fd kh\u00e1ch lo l\u1eafng. Qu\u00fd kh\u00e1ch xoay n\u00fam, mong c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c l\u1ef1c c\u1ea3n nh\u1eb9 v\u00e0 ti\u1ebfng kh\u1ea5c nh\u1ecf c\u1ee7a d\u00e2y c\u00f3t \u0111ang \u0111\u01b0\u1ee3c l\u00ean, nh\u01b0ng n\u00fam v\u1eb7n d\u01b0\u1eddng nh\u01b0 kh\u00f4ng k\u1ebft n\u1ed1i v\u1edbi b\u1ed9 m\u00e1y. \u0110\u00f4i khi \u0111\u1ed3ng h\u1ed3 v\u1eabn ch\u1ea1y; \u0111\u00f4i khi kh\u00f4ng c\u00f3 g\u00ec x\u1ea3y ra. \u0110i\u1ec1u quan tr\u1ecdng l\u00e0 n\u00fam v\u1eb7n quay tr\u01a1n kh\u00f4ng \u0111\u1ed3ng ngh\u0129a ch\u1eafc ch\u1eafn l\u00e0 n\u00fam \u0111\u00e3 h\u1ecfng<\/strong>. \u1ede nhi\u1ec1u m\u1eabu \u0111\u1ed3ng h\u1ed3, m\u1ed9t chi\u1ec1u \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 quay kh\u00f4ng t\u1ea3i. Trong b\u1ed9 m\u00e1y t\u1ef1 \u0111\u1ed9ng, d\u00e2y c\u00f3t c\u00f3 th\u1ec3 tr\u01b0\u1ee3t an to\u00e0n khi \u0111\u00e3 \u0111\u01b0\u1ee3c l\u00ean \u0111\u1ee7. N\u00fam v\u1eb7n c\u00f3 kh\u00f3a ren c\u0169ng tr\u1ea3i qua c\u00e1c giai \u0111o\u1ea1n m\u1edf kh\u00f3a, l\u00ean d\u00e2y, ch\u1ec9nh ng\u00e0y v\u00e0 ch\u1ec9nh gi\u1edd ri\u00eang bi\u1ec7t, v\u1edbi c\u1ea3m gi\u00e1c r\u1ea5t kh\u00e1c nhau.<\/p>\n

C\u00e2u h\u1ecfi h\u1eefu \u00edch kh\u00f4ng ch\u1ec9 l\u00e0 \u201cN\u00fam v\u1eb7n c\u00f3 xoay kh\u00f4ng?\u201d m\u00e0 l\u00e0 \u201c\u0110i\u1ec1u g\u00ec thay \u0111\u1ed5i khi n\u00fam xoay?\u201d M\u1ed9t s\u1ed1 b\u01b0\u1edbc ki\u1ec3m tra c\u1ea9n th\u1eadn, kh\u00f4ng x\u00e2m l\u1ea5n th\u01b0\u1eddng \u0111\u1ee7 \u0111\u1ec3 ph\u00e2n bi\u1ec7t ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng v\u1edbi l\u1ed7i h\u1ec7 th\u1ed1ng l\u00ean d\u00e2y, n\u00fam v\u1eb7n b\u1ecb l\u1ecfng, tr\u1ee5c n\u00fam b\u1ecb h\u1ecfng ho\u1eb7c s\u1ef1 c\u1ed1 \u1edf c\u01a1 c\u1ea5u ch\u1ec9nh. H\u01b0\u1edbng d\u1eabn n\u00e0y gi\u1ea3i th\u00edch c\u00e1ch ki\u1ec3m tra n\u00fam v\u1eb7n \u0111\u1ed3ng h\u1ed3 c\u01a1 an to\u00e0n, \u00fd ngh\u0129a c\u1ee7a k\u1ebft qu\u1ea3 v\u00e0 khi n\u00e0o n\u00ean d\u1eebng l\u1ea1i, mang \u0111\u1ed3ng h\u1ed3 \u0111\u1ebfn th\u1ee3 s\u1eeda \u0111\u1ed3ng h\u1ed3.<\/p>\n

Tr\u01b0\u1edbc ti\u00ean, x\u00e1c \u0111\u1ecbnh v\u1ecb tr\u00ed n\u00fam v\u1eb7n v\u00e0 chi\u1ec1u l\u00ean d\u00e2y<\/h2>\n

Tr\u01b0\u1edbc khi ch\u1ea9n \u0111o\u00e1n s\u1ef1 c\u1ed1, h\u00e3y x\u00e1c nh\u1eadn n\u00fam v\u1eb7n \u0111ang \u1edf \u0111\u00fang v\u1ecb tr\u00ed. V\u1edbi n\u00fam v\u1eb7n k\u00e9o \u0111\u1ea9y th\u00f4ng th\u01b0\u1eddng, \u0111\u1ed3ng h\u1ed3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00ean d\u00e2y khi n\u00fam \u0111\u01b0\u1ee3c \u1ea5n s\u00e1t v\u00e0o v\u1ecf. K\u00e9o n\u00fam \u0111\u1ebfn n\u1ea5c \u0111\u1ea7u ti\u00ean c\u00f3 th\u1ec3 d\u00f9ng \u0111\u1ec3 ch\u1ec9nh ng\u00e0y; v\u1ecb tr\u00ed ngo\u00e0i c\u00f9ng th\u01b0\u1eddng d\u00f9ng \u0111\u1ec3 ch\u1ec9nh kim. Ch\u1ee9c n\u0103ng c\u1ee5 th\u1ec3 t\u00f9y m\u1eabu, v\u00ec v\u1eady h\u00e3y \u01b0u ti\u00ean h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng c\u1ee7a m\u1eabu \u0111\u1ed3ng h\u1ed3.<\/p>\n

N\u00fam v\u1eb7n c\u00f3 kh\u00f3a ren c\u00f3 th\u00eam m\u1ed9t b\u01b0\u1edbc. Tr\u01b0\u1edbc ti\u00ean, c\u1ea7n m\u1edf kh\u00f3a, th\u01b0\u1eddng b\u1eb1ng c\u00e1ch xoay ng\u01b0\u1ee3c chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3 cho \u0111\u1ebfn khi ren nh\u1ea3 ra v\u00e0 n\u00fam h\u01a1i b\u1eadt kh\u1ecfi v\u1ecf. \u0110\u1ed9ng t\u00e1c th\u00e1o ren n\u00e0y kh\u00f4ng nh\u1ea5t thi\u1ebft l\u00e0m b\u1ed9 m\u00e1y l\u00ean d\u00e2y. Sau khi m\u1edf kh\u00f3a, \u0111\u1ec3 n\u00fam \u1edf v\u1ecb tr\u00ed ho\u1ea1t \u0111\u1ed9ng trong c\u00f9ng \u0111\u1ec3 l\u00ean d\u00e2y th\u1ee7 c\u00f4ng. H\u01b0\u1edbng d\u1eabn c\u1ee7a Seiko m\u00f4 t\u1ea3 c\u00e1ch m\u1edf kh\u00f3a b\u1eb1ng c\u00e1ch xoay ng\u01b0\u1ee3c chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3, sau \u0111\u00f3 l\u00ean d\u00e2y t\u1eeb t\u1eeb theo chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3. H\u01b0\u1edbng d\u1eabn c\u0169ng c\u1ea3nh b\u00e1o kh\u00f4ng d\u00f9ng l\u1ef1c khi v\u1eb7n n\u00fam \u0103n kh\u1edbp l\u1ea1i v\u1edbi ren tr\u00ean v\u1ecf.<\/p>\n

Chi\u1ec1u xoay r\u1ea5t quan tr\u1ecdng. Nhi\u1ec1u \u0111\u1ed3ng h\u1ed3 c\u01a1 ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c l\u00ean d\u00e2y khi xoay n\u00fam theo chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3, nh\u00ecn t\u1eeb ph\u00eda n\u00fam. Xoay theo chi\u1ec1u ng\u01b0\u1ee3c l\u1ea1i c\u00f3 th\u1ec3 t\u1ea1o ra r\u1ea5t \u00edt l\u1ef1c c\u1ea3n, ti\u1ebfng l\u00e1ch c\u00e1ch nh\u1eb9 ho\u1eb7c c\u1ea3m gi\u00e1c quay tr\u01a1n, v\u00ec chi\u1ec1u \u0111\u00f3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 quay kh\u00f4ng t\u1ea3i. Seiko n\u00eau r\u00f5 r\u1eb1ng xoay n\u00fam ng\u01b0\u1ee3c chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3 kh\u00f4ng l\u00ean d\u00e2y cho m\u1ed9t s\u1ed1 b\u1ed9 m\u00e1y t\u1ef1 \u0111\u1ed9ng c\u1ee7a h\u00e3ng. V\u00ec v\u1eady, n\u00fam v\u1eb7n ch\u1ec9 c\u00f3 c\u1ea3m gi\u00e1c l\u1ecfng theo m\u1ed9t chi\u1ec1u c\u00f3 th\u1ec3 ho\u00e0n to\u00e0n b\u00ecnh th\u01b0\u1eddng.<\/p>\n

\u0110\u1eebng cho r\u1eb1ng m\u1ecdi b\u1ed9 m\u00e1y \u0111\u1ec1u tu\u00e2n theo c\u00f9ng m\u1ed9t quy t\u1eafc. M\u1ed9t s\u1ed1 b\u1ed9 m\u00e1y l\u00ean d\u00e2y th\u1ee7 c\u00f4ng, c\u01a1 c\u1ea5u c\u1ed5 v\u00e0 c\u00e1ch b\u1ed1 tr\u00ed n\u00fam v\u1eb7n kh\u00e1c th\u01b0\u1eddng c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng kh\u00e1c. H\u00e3y d\u00f9ng h\u01b0\u1edbng d\u1eabn c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t ho\u1eb7c t\u00e0i li\u1ec7u h\u01b0\u1edbng d\u1eabn ri\u00eang cho b\u1ed9 m\u00e1y khi c\u00f3 th\u1ec3. N\u1ebfu \u0111\u1ed3ng h\u1ed3 c\u00f3 n\u00fam v\u1eb7n kh\u00f3a ren, h\u00e3y m\u1edf kh\u00f3a ho\u00e0n to\u00e0n tr\u01b0\u1edbc khi \u0111\u00e1nh gi\u00e1 c\u1ea3m gi\u00e1c l\u00ean d\u00e2y.<\/p>\n

V\u00ec sao n\u00fam v\u1eb7n \u0111\u1ed3ng h\u1ed3 t\u1ef1 \u0111\u1ed9ng c\u00f3 th\u1ec3 quay sau khi l\u00ean d\u00e2y \u0111\u1ea7y \u0111\u1ee7<\/h2>\n

\"Automatic<\/p>\n

\u0110\u1ed3ng h\u1ed3 t\u1ef1 \u0111\u1ed9ng c\u1ea7n \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 kh\u1ecfi t\u00ecnh tr\u1ea1ng l\u00ean d\u00e2y qu\u00e1 m\u1ee9c, v\u00ec r\u00f4-to c\u00f3 th\u1ec3 ti\u1ebfp t\u1ee5c chuy\u1ec3n \u0111\u1ed9ng r\u1ea5t l\u00e2u sau khi d\u00e2y c\u00f3t<\/a> \u0111\u00e3 \u0111\u1ea1t m\u1ee9c t\u00edch tr\u1eef n\u0103ng l\u01b0\u1ee3ng h\u1eefu \u00edch. V\u00ec v\u1eady, h\u1ea7u h\u1ebft c\u00e1c h\u1ed9p c\u00f3t t\u1ef1 \u0111\u1ed9ng \u0111\u1ec1u d\u00f9ng m\u1ed9t c\u01a1 c\u1ea5u tr\u01b0\u1ee3t. Khi l\u1ef1c c\u0103ng c\u1ee7a d\u00e2y c\u00f3t \u0111\u1ea1t \u0111\u1ebfn m\u1ee9c thi\u1ebft k\u1ebf, c\u01a1 c\u1ea5u n\u00e0y tr\u01b0\u1ee3t d\u1ecdc theo th\u00e0nh trong c\u1ee7a h\u1ed9p c\u00f3t, thay v\u00ec \u0111\u1ec3 l\u1ef1c c\u0103ng t\u0103ng v\u00f4 h\u1ea1n.<\/p>\n

\u0110i\u1ec1u n\u00e0y l\u00e0m thay \u0111\u1ed5i c\u1ea3m gi\u00e1c \u1edf n\u00fam v\u1eb7n. Kh\u00e1c v\u1edbi \u0111\u1ed3ng h\u1ed3 l\u00ean d\u00e2y th\u1ee7 c\u00f4ng truy\u1ec1n th\u1ed1ng th\u01b0\u1eddng c\u00f3 \u0111i\u1ec3m d\u1eebng ch\u1eafc ch\u1eafn, nhi\u1ec1u \u0111\u1ed3ng h\u1ed3 t\u1ef1 \u0111\u1ed9ng v\u1eabn ti\u1ebfp t\u1ee5c xoay khi \u0111\u00e3 l\u00ean d\u00e2y \u0111\u1ea7y \u0111\u1ee7. H\u01b0\u1edbng d\u1eabn c\u1ee7a Grand Seiko gi\u1ea3i th\u00edch r\u1eb1ng d\u00e2y c\u00f3t tr\u01b0\u1ee3t b\u00ean trong khi \u0111\u01b0\u1ee3c l\u00ean \u0111\u1ea7y \u0111\u1ee7, nh\u1edd \u0111\u00f3 n\u00fam v\u1eb7n ti\u1ebfp t\u1ee5c xoay m\u00e0 kh\u00f4ng l\u00e0m \u0111\u1ee9t d\u00e2y c\u00f3t. Citizen c\u0169ng cho bi\u1ebft v\u1edbi m\u1ed9t s\u1ed1 b\u1ed9 m\u00e1y t\u1ef1 \u0111\u1ed9ng c\u1ee5 th\u1ec3, vi\u1ec7c ti\u1ebfp t\u1ee5c xoay sau khi l\u00ean d\u00e2y \u0111\u1ea7y \u0111\u1ee7 kh\u00f4ng l\u00e0m h\u1ecfng d\u00e2y c\u00f3t.<\/p>\n

C\u01a1 ch\u1ebf b\u1ea3o v\u1ec7 \u0111\u00f3 kh\u00f4ng c\u00f3 ngh\u0129a l\u00e0 n\u00ean l\u00ean d\u00e2y li\u00ean t\u1ee5c. N\u00fam v\u1eb7n, gio\u0103ng, tr\u1ee5c n\u00fam, c\u00e1c b\u1ed9 ph\u1eadn tr\u01b0\u1ee3t v\u00e0 b\u1ed9 truy\u1ec1n l\u00ean d\u00e2y v\u1eabn chuy\u1ec3n \u0111\u1ed9ng. Ch\u1ec9 xoay ch\u1eadm theo s\u1ed1 v\u00f2ng \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb cho m\u1eabu \u0111\u1ed3ng h\u1ed3, r\u1ed3i d\u1eebng l\u1ea1i. Citizen khuy\u00ean n\u00ean l\u00ean d\u00e2y nh\u1eb9 nh\u00e0ng v\u00ec d\u00f9ng l\u1ef1c ho\u1eb7c xoay qu\u00e1 nhanh c\u00f3 th\u1ec3 l\u00e0m t\u0103ng \u0111\u1ed9 m\u00e0i m\u00f2n c\u1ee7a c\u00e1c b\u00e1nh r\u0103ng \u0103n kh\u1edbp tinh vi. Nh\u1ecbp v\u1eeba ph\u1ea3i, kho\u1ea3ng m\u1ed9t ho\u1eb7c hai v\u00f2ng m\u1ed7i gi\u00e2y, ph\u00f9 h\u1ee3p h\u01a1n v\u1edbi vi\u1ec7c xoay n\u00fam nhanh qua l\u1ea1i.<\/p>\n

Khi l\u00ean d\u00e2y theo chi\u1ec1u ho\u1ea1t \u0111\u1ed9ng, \u0111\u1ed3ng h\u1ed3 t\u1ef1 \u0111\u1ed9ng \u0111\u00e3 \u0111\u01b0\u1ee3c l\u00ean \u0111\u1ea7y \u0111\u1ee7 v\u1eabn n\u00ean c\u00f3 m\u1ed9t ch\u00fat ph\u1ea3n h\u1ed3i c\u01a1 h\u1ecdc, d\u00f9 c\u1ea3m gi\u00e1c c\u1ee5 th\u1ec3 c\u00f3 th\u1ec3 r\u1ea5t nh\u1eb9. C\u01a1 c\u1ea5u tr\u01b0\u1ee3t th\u01b0\u1eddng t\u1ea1o ra c\u1ea3m gi\u00e1c l\u1eb7p l\u1ea1i, \u00eam \u00e1i thay v\u00ec khi\u1ebfn n\u00fam ho\u00e0n to\u00e0n m\u1ea5t k\u1ebft n\u1ed1i. \u00c2m thanh v\u00e0 l\u1ef1c c\u1ea3n thay \u0111\u1ed5i \u0111\u00e1ng k\u1ec3 t\u00f9y theo b\u1ed9 m\u00e1y, k\u1ebft c\u1ea5u v\u1ecf, t\u00ecnh tr\u1ea1ng d\u1ea7u b\u00f4i tr\u01a1n v\u00e0 k\u00edch th\u01b0\u1edbc n\u00fam v\u1eb7n, v\u00ec v\u1eady ch\u1ec9 d\u1ef1a v\u00e0o c\u1ea3m gi\u00e1c th\u00ec kh\u00f4ng th\u1ec3 x\u00e1c nh\u1eadn c\u00f3 s\u1ef1 c\u1ed1.<\/p>\n

B\u00e0i ki\u1ec3m tra an to\u00e0n trong n\u0103m ph\u00fat cho n\u00fam v\u1eb7n quay tr\u01a1n<\/h2>\n

Th\u1ef1c hi\u1ec7n ki\u1ec3m tra tr\u00ean m\u1eb7t b\u00e0n, v\u1edbi tay s\u1ea1ch v\u00e0 kh\u00f4. Kh\u00f4ng ki\u1ec3m tra \u0111\u1ed3ng h\u1ed3 \u0111ang \u01b0\u1edbt v\u00e0 kh\u00f4ng thao t\u00e1c n\u00fam v\u1eb7n kh\u00f3a ren g\u1ea7n n\u01b0\u1edbc.<\/p>\n

    \n
  1. X\u00e1c nh\u1eadn lo\u1ea1i b\u1ed9 m\u00e1y.<\/strong> \u0110\u1ed3ng h\u1ed3 th\u1ea1ch anh kh\u00f4ng l\u00ean d\u00e2y nh\u01b0 \u0111\u1ed3ng h\u1ed3 c\u01a1. M\u1ed9t s\u1ed1 b\u1ed9 m\u00e1y t\u1ef1 \u0111\u1ed9ng ho\u00e0n to\u00e0n kh\u00f4ng h\u1ed7 tr\u1ee3 l\u00ean d\u00e2y th\u1ee7 c\u00f4ng, \u0111\u1eb7c bi\u1ec7t l\u00e0 m\u1ed9t s\u1ed1 thi\u1ebft k\u1ebf \u0111\u1eddi c\u0169 ho\u1eb7c d\u00f2ng ph\u1ed5 th\u00f4ng.<\/li>\n
  2. Ki\u1ec3m tra h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng.<\/strong> X\u00e1c minh v\u1ecb tr\u00ed l\u00ean d\u00e2y, chi\u1ec1u xoay ho\u1ea1t \u0111\u1ed9ng, s\u1ed1 v\u00f2ng kh\u1edfi \u0111\u1ea7u \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb v\u00e0 c\u00e1ch thao t\u00e1c v\u1edbi n\u00fam v\u1eb7n kh\u00f3a ren cho \u0111\u00fang b\u1ed9 m\u00e1y ho\u1eb7c m\u00e3 tham chi\u1ebfu.<\/li>\n
  3. \u0110\u1eb7t n\u00fam v\u1eb7n \u0111\u00fang v\u1ecb tr\u00ed.<\/strong> V\u1edbi n\u00fam v\u1eb7n k\u00e9o \u0111\u1ea9y, nh\u1eb9 nh\u00e0ng \u1ea5n n\u00fam v\u1ec1 v\u1ecb tr\u00ed b\u00ecnh th\u01b0\u1eddng. V\u1edbi n\u00fam v\u1eb7n kh\u00f3a ren, m\u1edf kh\u00f3a ho\u00e0n to\u00e0n nh\u01b0ng kh\u00f4ng k\u00e9o n\u00fam ra ngo\u00e0i.<\/li>\n
  4. Xoay ch\u1eadm theo chi\u1ec1u l\u00ean d\u00e2y<\/a> \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh.<\/strong> V\u1edbi \u0111\u1ed3ng h\u1ed3 t\u1ef1 \u0111\u1ed9ng \u0111\u00e3 d\u1eebng, h\u00e3y l\u00ean d\u00e2y ban \u0111\u1ea7u theo s\u1ed1 v\u00f2ng nh\u00e0 s\u1ea3n xu\u1ea5t khuy\u1ebfn ngh\u1ecb. H\u01b0\u1edbng d\u1eabn \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 c\u00f3 kh\u00e1c bi\u1ec7t: Rolex khuy\u1ebfn ngh\u1ecb l\u00ean \u00edt nh\u1ea5t 25 v\u00f2ng \u0111\u1ec3 \u0111\u1ea1t m\u1ee9c l\u00ean d\u00e2y m\u1ed9t ph\u1ea7n ph\u00f9 h\u1ee3p cho \u0111\u1ed3ng h\u1ed3 c\u1ee7a h\u00e3ng, trong khi Citizen khuy\u00ean l\u00ean 10\u201320 v\u00f2ng tr\u01b0\u1edbc khi \u0111eo \u0111\u1ed3ng h\u1ed3 t\u1ef1 \u0111\u1ed9ng \u0111\u00e3 d\u1eebng, theo h\u01b0\u1edbng d\u1eabn ch\u0103m s\u00f3c chung. \u0110\u00e2y l\u00e0 v\u00ed d\u1ee5 ri\u00eang theo t\u1eebng th\u01b0\u01a1ng hi\u1ec7u, kh\u00f4ng ph\u1ea3i con s\u1ed1 \u00e1p d\u1ee5ng cho m\u1ecdi \u0111\u1ed3ng h\u1ed3.<\/li>\n
  5. Quan s\u00e1t k\u1ebft qu\u1ea3.<\/strong> Kim gi\u00e2y c\u00f3 b\u1eaft \u0111\u1ea7u ch\u1ea1y kh\u00f4ng? M\u1ee9c d\u1ef1 tr\u1eef n\u0103ng l\u01b0\u1ee3ng c\u00f3 t\u0103ng kh\u00f4ng? \u0110\u1ed3ng h\u1ed3 c\u00f3 ti\u1ebfp t\u1ee5c ch\u1ea1y khi \u0111\u1ec3 y\u00ean kh\u00f4ng? Nh\u1eefng k\u1ebft qu\u1ea3 n\u00e0y quan tr\u1ecdng h\u01a1n vi\u1ec7c n\u00fam v\u1eb7n c\u00f3 c\u1ea3m gi\u00e1c nh\u1eb9 b\u1ea5t th\u01b0\u1eddng hay kh\u00f4ng.<\/li>\n<\/ol>\n

    N\u1ebfu \u0111\u1ed3ng h\u1ed3 \u0111\u00e3 d\u1eebng b\u1eaft \u0111\u1ea7u ch\u1ea1y v\u00e0 t\u00edch l\u0169y \u0111\u01b0\u1ee3c m\u1ee9c d\u1ef1 tr\u1eef n\u0103ng l\u01b0\u1ee3ng h\u1ee3p l\u00fd, c\u1ea3m gi\u00e1c n\u00fam v\u1eb7n nh\u1eb9 c\u00f3 th\u1ec3 l\u00e0 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a b\u1ed9 m\u00e1y. N\u1ebfu kim di chuy\u1ec3n khi ch\u1ec9nh gi\u1edd, l\u1ecbch ng\u00e0y chuy\u1ec3n b\u00ecnh th\u01b0\u1eddng v\u00e0 n\u00fam v\u1eb7n v\u1eabn \u0111\u01b0\u1ee3c g\u1eafn ch\u1eafc ch\u1eafn, th\u00ec tr\u1ee5c n\u00fam v\u00e0 c\u01a1 c\u1ea5u ch\u1ec9nh \u00edt nh\u1ea5t \u0111ang \u0103n kh\u1edbp \u1edf nh\u1eefng v\u1ecb tr\u00ed \u0111\u00f3.<\/p>\n

    V\u1edbi \u0111\u1ed3ng h\u1ed3 kh\u00f4ng c\u00f3 ch\u1ec9 b\u00e1o m\u1ee9c d\u1ef1 tr\u1eef n\u0103ng l\u01b0\u1ee3ng, h\u00e3y l\u00ean d\u00e2y theo h\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng, \u0111\u1eb7t \u0111\u1ed3ng h\u1ed3 xu\u1ed1ng r\u1ed3i ghi l\u1ea1i th\u1eddi \u0111i\u1ec3m b\u1eaft \u0111\u1ea7u v\u00e0 d\u1eebng. \u0110\u1eebng so s\u00e1nh k\u1ebft qu\u1ea3 v\u1edbi m\u1ee9c k\u1ef3 v\u1ecdng chung c\u1ee7a \u0111\u1ed3ng h\u1ed3 t\u1ef1 \u0111\u1ed9ng \u201c40 gi\u1edd\u201d. H\u00e3y d\u00f9ng m\u1ee9c d\u1ef1 tr\u1eef \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 cho \u0111\u00fang b\u1ed9 m\u00e1y. N\u1ebfu th\u1eddi gian ch\u1ea1y ng\u1eafn h\u01a1n \u0111\u00e1ng k\u1ec3 sau khi th\u1eed nghi\u1ec7m c\u00f3 ki\u1ec3m so\u00e1t v\u1edbi d\u00e2y c\u00f3t \u0111\u01b0\u1ee3c l\u00ean \u0111\u1ea7y, \u0111\u00e2y l\u00e0 th\u00f4ng tin h\u1eefu \u00edch cho vi\u1ec7c s\u1eeda ch\u1eefa, nh\u01b0ng t\u1ef1 n\u00f3 kh\u00f4ng x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c b\u1ed9 ph\u1eadn n\u00e0o b\u1ecb l\u1ed7i.<\/p>\n

    D\u1ea5u hi\u1ec7u n\u00fam v\u1eb7n ho\u1eb7c h\u1ec7 th\u1ed1ng l\u00ean d\u00e2y c\u00f3 th\u1ec3 b\u1ecb l\u1ed7i<\/h2>\n

    N\u00fam v\u1eb7n \u0111\u1ed3ng h\u1ed3 c\u01a1 xoay t\u1ef1 do c\u1ea7n \u0111\u01b0\u1ee3c chuy\u00ean gia ki\u1ec3m tra n\u1ebfu kh\u00f4ng c\u00f3 t\u00e1c d\u1ee5ng l\u00ean d\u00e2y khi \u1edf \u0111\u00fang v\u1ecb tr\u00ed v\u00e0 xoay \u0111\u00fang chi\u1ec1u. M\u1ed9t s\u1ed1 tri\u1ec7u ch\u1ee9ng khi\u1ebfn kh\u1ea3 n\u0103ng x\u1ea3y ra l\u1ed7i cao h\u01a1n:<\/p>\n