{"id":867,"date":"2026-06-24T09:16:11","date_gmt":"2026-06-24T09:16:11","guid":{"rendered":"https:\/\/oldhamcoupling.net\/oldham-couplings-in-3d-printers-improving-print-accuracy-on-corexy-and-cartesian-machines\/"},"modified":"2026-06-24T09:16:11","modified_gmt":"2026-06-24T09:16:11","slug":"oldham-couplings-in-3d-printers-improving-print-accuracy-on-corexy-and-cartesian-machines","status":"publish","type":"post","link":"https:\/\/oldhamcoupling.net\/vi\/oldham-couplings-in-3d-printers-improving-print-accuracy-on-corexy-and-cartesian-machines\/","title":{"rendered":"Kh\u1edbp n\u1ed1i Oldham trong m\u00e1y in 3D: C\u1ea3i thi\u1ec7n \u0111\u1ed9 ch\u00ednh x\u00e1c in tr\u00ean m\u00e1y CoreXY v\u00e0 Cartesian"},"content":{"rendered":"

N\u1ebfu b\u1ea1n \u0111\u00e3 t\u1eebng ki\u1ec3m tra b\u1ea3n in 3D d\u01b0\u1edbi \u00e1nh s\u00e1ng xi\u00ean v\u00e0 nh\u1eadn th\u1ea5y m\u1ed9t m\u00f4 h\u00ecnh s\u1ecdc \u0111\u1ec1u \u0111\u1eb7n tr\u00ean c\u00e1c b\u1ee9c t\u01b0\u1eddng th\u1eb3ng \u0111\u1ee9ng \u2014 c\u00e1c s\u1ecdc c\u00e1ch nhau ch\u00ednh x\u00e1c m\u1ed9t b\u01b0\u1edbc ren tr\u1ee5c v\u00edt \u2014 th\u00ec b\u1ea1n \u0111\u00e3 th\u1ea5y k\u1ebft qu\u1ea3 tr\u1ef1c ti\u1ebfp c\u1ee7a s\u1ef1 sai l\u1ec7ch tr\u1ee5c v\u00edt truy\u1ec1n \u0111\u1ed9 rung l\u1eafc h\u01b0\u1edbng t\u00e2m v\u00e0o chuy\u1ec3n \u0111\u1ed9ng tr\u1ee5c Z. Hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y, \u0111\u01b0\u1ee3c g\u1ecdi b\u1eb1ng nhi\u1ec1u t\u00ean kh\u00e1c nhau nh\u01b0 s\u1ecdc Z, rung l\u1eafc Z ho\u1eb7c VFA (Vertical Fine Artefacts), l\u00e0 m\u1ed9t trong nh\u1eefng v\u1ea5n \u0111\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng in ph\u1ed5 bi\u1ebfn nh\u1ea5t tr\u00ean m\u00e1y in 3D Cartesian v\u00e0 CoreXY, v\u00e0 h\u1ea7u nh\u01b0 ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 ng\u0103n ng\u1eeba \u0111\u01b0\u1ee3c b\u1eb1ng c\u00e1ch l\u1ef1a ch\u1ecdn kh\u1edbp n\u1ed1i ch\u00ednh x\u00e1c.<\/p>\n

C\u00e1i Kh\u1edbp n\u1ed1i Oldham<\/strong> \u2014 m\u1ed9t b\u1ed9 ph\u1eadn hi\u1ebfm khi \u0111\u01b0\u1ee3c th\u1ea3o lu\u1eadn trong c\u1ed9ng \u0111\u1ed3ng in 3D d\u00e0nh cho ng\u01b0\u1eddi ti\u00eau d\u00f9ng nh\u01b0ng l\u1ea1i \u0111\u01b0\u1ee3c hi\u1ec3u r\u00f5 trong k\u1ef9 thu\u1eadt chuy\u1ec3n \u0111\u1ed9ng ch\u00ednh x\u00e1c \u2014 l\u00e0 gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt ch\u00ednh x\u00e1c cho tr\u1ee5c Z d\u1eabn \u0111\u1ed9ng b\u1eb1ng v\u00edt me. B\u00e0i vi\u1ebft n\u00e0y gi\u1ea3i th\u00edch t\u1ea1i sao hi\u1ec7n t\u01b0\u1ee3ng rung l\u1eafc tr\u1ee5c Z x\u1ea3y ra, c\u00e1ch kh\u1edbp n\u1ed1i Oldham lo\u1ea1i b\u1ecf hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y v\u00e0 c\u00e1ch ch\u1ecdn v\u00e0 l\u1eafp \u0111\u1eb7t kh\u1edbp n\u1ed1i ph\u00f9 h\u1ee3p cho c\u00e1c n\u1ec1n t\u1ea3ng m\u00e1y in ph\u1ed5 bi\u1ebfn.<\/p>\n

\n \"Kh\u1edbp
Kh\u1edbp n\u1ed1i Oldham gi\u1eefa \u0111\u1ed9ng c\u01a1 b\u01b0\u1edbc v\u00e0 tr\u1ee5c v\u00edt gi\u00fap h\u1ea5p th\u1ee5 \u0111\u1ed9 l\u1ec7ch tr\u1ee5c song song v\u00e0 ng\u0103n ng\u1eeba hi\u1ec7n t\u01b0\u1ee3ng s\u1ecdc do rung l\u1eafc tr\u00ean b\u1ec1 m\u1eb7t in.<\/figcaption><\/figure>\n

T\u1ea1i sao hi\u1ec7n t\u01b0\u1ee3ng Z-Wobble x\u1ea3y ra: Nguy\u00ean nh\u00e2n g\u1ed1c r\u1ec5<\/h2>\n

Tr\u00ean h\u1ea7u h\u1ebft c\u00e1c m\u00e1y in 3D \u0111\u1ec3 b\u00e0n, tr\u1ee5c Z \u0111\u01b0\u1ee3c d\u1eabn \u0111\u1ed9ng b\u1edfi m\u1ed9t ho\u1eb7c hai tr\u1ee5c v\u00edt d\u1eabn \u0111\u1ed9ng \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp ho\u1eb7c th\u00f4ng qua kh\u1edbp n\u1ed1i c\u1ee9ng v\u1edbi c\u00e1c \u0111\u1ed9ng c\u01a1 b\u01b0\u1edbc. Tr\u1ee5c v\u00edt d\u1eabn \u0111\u1ed9ng \u0111i qua m\u1ed9t \u0111ai \u1ed1c b\u1eb1ng \u0111\u1ed3ng thau ho\u1eb7c \u0111ai \u1ed1c ch\u1ed1ng rung \u0111\u01b0\u1ee3c g\u1eafn v\u00e0o khung X ho\u1eb7c gi\u00e1 \u0111\u1ee1 in, chuy\u1ec3n \u0111\u1ed5i chuy\u1ec3n \u0111\u1ed9ng quay th\u00e0nh chuy\u1ec3n \u0111\u1ed9ng th\u1eb3ng \u0111\u1ee9ng.<\/p>\n

V\u1ea5n \u0111\u1ec1 b\u1eaft \u0111\u1ea7u t\u1eeb s\u1ef1 th\u1eb3ng h\u00e0ng. M\u1ed9t tr\u1ee5c v\u00edt kh\u00f4ng ho\u00e0n to\u00e0n \u0111\u1ed3ng tr\u1ee5c v\u1edbi tr\u1ee5c \u0111\u1ed9ng c\u01a1 d\u1eabn \u0111\u1ed9ng s\u1ebd t\u1ea1o ra m\u1ed9t qu\u1ef9 \u0111\u1ea1o quay nh\u1eb9 khi quay. Chuy\u1ec3n \u0111\u1ed9ng qu\u1ef9 \u0111\u1ea1o n\u00e0y \u2014 \u0111\u1ea7u tr\u00ean c\u1ee7a tr\u1ee5c v\u00edt quay quanh tr\u1ee5c th\u1ef1c \u2014 \u0111\u1ea9y v\u00e0 k\u00e9o \u0111ai \u1ed1c tr\u1ee5c v\u00edt theo chi\u1ec1u ngang v\u1edbi m\u1ed7i v\u00f2ng quay. \u0110ai \u1ed1c, b\u1ecb gi\u1edbi h\u1ea1n b\u1edfi khung m\u00e1y v\u00e0 ray d\u1eabn h\u01b0\u1edbng, kh\u00f4ng th\u1ec3 di chuy\u1ec3n theo chi\u1ec1u ngang, v\u00ec v\u1eady thay v\u00e0o \u0111\u00f3 n\u00f3 g\u00e2y ra sai l\u1ec7ch \u0111\u1ecbnh v\u1ecb theo chi\u1ec1u d\u1ecdc \u0111\u1ecbnh k\u1ef3 khi n\u00f3 tr\u01b0\u1ee3t l\u00ean xu\u1ed1ng tr\u00ean ren tr\u1ee5c v\u00edt b\u1ecb lung lay. M\u1ed9t v\u00f2ng quay ho\u00e0n ch\u1ec9nh c\u1ee7a tr\u1ee5c v\u00edt t\u1ea1o ra ch\u00ednh x\u00e1c m\u1ed9t d\u1ea3i tr\u00ean b\u1ec1 m\u1eb7t in.<\/p>\n

Sai l\u1ec7ch g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng rung l\u1eafc n\u00e0y h\u1ea7u nh\u01b0 kh\u00f4ng th\u1ec3 lo\u1ea1i b\u1ecf ho\u00e0n to\u00e0n ch\u1ec9 b\u1eb1ng c\u00e1ch c\u0103n ch\u1ec9nh c\u01a1 h\u1ecdc. B\u1ea3n th\u00e2n tr\u1ee5c v\u00edt c\u00f3 th\u1ec3 c\u00f3 m\u1ed9t dung sai nh\u1ecf v\u1ec1 \u0111\u1ed9 th\u1eb3ng. T\u1ea5m g\u1eafn \u0111\u1ed9ng c\u01a1 c\u00f3 th\u1ec3 c\u00f3 m\u1ed9t sai s\u1ed1 g\u00f3c nh\u1ecf. B\u1ed9 n\u1ed1i c\u00f3 th\u1ec3 g\u00e2y ra \u0111\u1ed9 l\u1ec7ch t\u00e2m. V\u00e0 sau chu k\u1ef3 nhi\u1ec7t v\u00e0 s\u1ef1 \u1ed5n \u0111\u1ecbnh c\u01a1 h\u1ecdc c\u1ee7a khung m\u00e1y in, b\u1ea5t k\u1ef3 s\u1ef1 c\u0103n ch\u1ec9nh ban \u0111\u1ea7u n\u00e0o c\u0169ng s\u1ebd b\u1ecb l\u1ec7ch. M\u1ed9t b\u1ed9 n\u1ed1i truy\u1ec1n sai l\u1ec7ch n\u00e0y \u0111\u1ebfn tr\u1ee5c v\u00edt s\u1ebd lu\u00f4n t\u1ea1o ra m\u1ed9t m\u1ee9c \u0111\u1ed9 rung l\u1eafc tr\u1ee5c Z nh\u1ea5t \u0111\u1ecbnh; m\u1ed9t b\u1ed9 n\u1ed1i h\u1ea5p th\u1ee5 \u0111\u1ed9 l\u1ec7ch s\u1ebd ng\u0103n ch\u1eb7n ho\u00e0n to\u00e0n hi\u1ec7n t\u01b0\u1ee3ng n\u00e0y.<\/p>\n

V\u00ec sao kh\u1edbp n\u1ed1i linh ho\u1ea1t gi\u1ea3i quy\u1ebft m\u1ed9t ph\u1ea7n v\u1ea5n \u0111\u1ec1 \u2014 v\u00e0 \u0111\u1ed3ng th\u1eddi l\u00e0m tr\u1ea7m tr\u1ecdng th\u00eam v\u1ea5n \u0111\u1ec1 \u2014?<\/h2>\n

H\u1ea7u h\u1ebft c\u00e1c m\u00e1y in 3D \u0111\u1ec1u \u0111\u01b0\u1ee3c trang b\u1ecb m\u1ed9t trong hai lo\u1ea1i kh\u1edbp n\u1ed1i: kh\u1edbp n\u1ed1i nh\u00f4m c\u1ee9ng ho\u1eb7c kh\u1edbp n\u1ed1i xo\u1eafn \u1ed1c linh ho\u1ea1t (\u0111\u00f4i khi \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 kh\u1edbp n\u1ed1i xo\u1eafn \u1ed1c ho\u1eb7c kh\u1edbp n\u1ed1i d\u1ea1ng d\u1ea7m). Hi\u1ec3u \u0111\u01b0\u1ee3c l\u00fd do t\u1ea1i sao c\u1ea3 hai \u0111\u1ec1u kh\u00f4ng ph\u1ea3i l\u00e0 gi\u1ea3i ph\u00e1p t\u1ed1i \u01b0u s\u1ebd gi\u00fap gi\u1ea3i th\u00edch t\u1ea1i sao kh\u1edbp n\u1ed1i Oldham l\u1ea1i v\u01b0\u1ee3t tr\u1ed9i h\u01a1n trong \u1ee9ng d\u1ee5ng c\u1ee5 th\u1ec3 n\u00e0y.<\/p>\n

kh\u1edbp n\u1ed1i c\u1ee9ng<\/strong> Ch\u00fang truy\u1ec1n tr\u1ef1c ti\u1ebfp b\u1ea5t k\u1ef3 s\u1ef1 l\u1ec7ch tr\u1ee5c n\u00e0o c\u1ee7a \u0111\u1ed9ng c\u01a1 v\u00e0o v\u00edt me, t\u1ea1o ra \u0111\u1ed9 l\u1eafc ngang t\u1ed1i \u0111a. Ch\u00fang l\u00e0 l\u1ef1a ch\u1ecdn t\u1ed3i t\u1ec7 nh\u1ea5t cho \u1ee9ng d\u1ee5ng n\u00e0y tr\u1eeb khi tr\u1ee5c \u0111\u01b0\u1ee3c c\u0103n ch\u1ec9nh ho\u00e0n h\u1ea3o \u2014 \u0111i\u1ec1u m\u00e0 tr\u00ean th\u1ef1c t\u1ebf kh\u00f4ng bao gi\u1edd x\u1ea3y ra.<\/p>\n

Kh\u1edbp n\u1ed1i c\u1eaft xo\u1eafn \u1ed1c linh ho\u1ea1t<\/strong> C\u00e1c kh\u1edbp n\u1ed1i c\u1ee9ng \u0111\u01b0\u1ee3c c\u1ea3i ti\u1ebfn b\u1eb1ng c\u00e1ch cung c\u1ea5p m\u1ed9t s\u1ed1 \u0111\u1ed9 \u0111\u00e0n h\u1ed3i g\u00f3c v\u00e0 ngang, gi\u00fap gi\u1ea3m \u0111\u1ed9 rung l\u1eafc truy\u1ec1n \u0111\u1ebfn tr\u1ee5c v\u00edt. Tuy nhi\u00ean, ch\u00fang l\u00e0m \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y th\u00f4ng qua bi\u1ebfn d\u1ea1ng \u0111\u00e0n h\u1ed3i \u2014 ch\u00fang ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t l\u00f2 xo xo\u1eafn. \u200b\u200b\u0110\u1ed9 \u0111\u00e0n h\u1ed3i n\u00e0y c\u00f3 hai h\u1eadu qu\u1ea3 ti\u00eau c\u1ef1c: th\u1ee9 nh\u1ea5t, l\u1ef1c ph\u1ee5c h\u1ed3i gi\u1ed1ng nh\u01b0 l\u00f2 xo \u0111\u1ea9y ng\u01b0\u1ee3c l\u1ea1i s\u1ef1 l\u1ec7ch tr\u1ee5c, truy\u1ec1n m\u1ed9t l\u1ef1c h\u01b0\u1edbng t\u00e2m v\u00e0o \u1ed5 tr\u1ee5c \u0111\u1ed9ng c\u01a1 v\u00e0 \u1ed5 tr\u1ee5c \u0111\u1ea7u tr\u1ee5c v\u00edt v\u1edbi m\u1ed7i v\u00f2ng quay; th\u1ee9 hai, s\u1ef1 xo\u1eafn d\u01b0\u1edbi t\u1ea3i tr\u1ecdng t\u1ea1o ra m\u1ed9t \u0111\u1ed9 tr\u1ec5 pha nh\u1ecf nh\u01b0ng c\u00f3 th\u1ec3 \u0111o \u0111\u01b0\u1ee3c gi\u1eefa b\u01b0\u1edbc \u0111\u1ed9ng c\u01a1 v\u00e0 v\u00f2ng quay c\u1ee7a tr\u1ee5c v\u00edt, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 xu\u1ea5t hi\u1ec7n d\u01b0\u1edbi d\u1ea1ng s\u1ef1 kh\u00f4ng nh\u1ea5t qu\u00e1n gi\u1eefa c\u00e1c l\u1edbp d\u01b0\u1edbi t\u1ea3i tr\u1ecdng \u00e9p \u0111\u00f9n kh\u00e1c nhau.<\/p>\n

Kh\u1edbp n\u1ed1i Oldham h\u1ea5p th\u1ee5 \u0111\u1ed9 l\u1ec7ch ngang th\u00f4ng qua c\u01a1 ch\u1ebf \u0111\u0129a tr\u01b0\u1ee3t c\u1ee7a n\u00f3 \u2014 m\u00e0 kh\u00f4ng c\u1ea7n l\u1ef1c \u0111\u00e0n h\u1ed3i c\u1ee7a l\u00f2 xo, kh\u00f4ng c\u00f3 \u0111\u1ed9 \u0111\u00e0n h\u1ed3i xo\u1eafn v\u00e0 kh\u00f4ng c\u00f3 \u0111\u1ed9 tr\u1ec5 pha. \u0110\u1ed9ng c\u01a1 v\u00e0 tr\u1ee5c v\u00edt quay \u0111\u1ed3ng b\u1ed9 ch\u00ednh x\u00e1c trong khi \u0111\u1ed9 l\u1ec7ch gi\u1eefa c\u00e1c tr\u1ee5c c\u1ee7a ch\u00fang \u0111\u01b0\u1ee3c b\u00f9 tr\u1eeb ho\u00e0n to\u00e0n trong ch\u00ednh kh\u1edbp n\u1ed1i.<\/p>\n

C\u00e1ch kh\u1edbp n\u1ed1i Oldham lo\u1ea1i b\u1ecf hi\u1ec7n t\u01b0\u1ee3ng rung l\u1eafc ch\u1eef Z<\/h2>\n

Khi kh\u1edbp n\u1ed1i Oldham k\u1ebft n\u1ed1i tr\u1ee5c \u0111\u1ed9ng c\u01a1 b\u01b0\u1edbc v\u1edbi tr\u1ee5c v\u00edt d\u1eabn \u0111\u1ed9ng, \u0111\u0129a trung t\u00e2m s\u1ebd tr\u01b0\u1ee3t trong c\u00e1c r\u00e3nh c\u1ee7a moay\u01a1 \u0111\u1ec3 li\u00ean t\u1ee5c h\u1ea5p th\u1ee5 b\u1ea5t k\u1ef3 \u0111\u1ed9 l\u1ec7ch ngang n\u00e0o gi\u1eefa hai tr\u1ee5c. Tr\u1ee5c v\u00edt d\u1eabn \u0111\u1ed9ng \u0111\u01b0\u1ee3c d\u1eabn \u0111\u1ed9ng v\u1edbi t\u1ed1c \u0111\u1ed9 quay ch\u00ednh x\u00e1c \u1edf m\u1ecdi v\u1ecb tr\u00ed g\u00f3c \u2014 kh\u00f4ng c\u00f3 chuy\u1ec3n \u0111\u1ed9ng qu\u1ef9 \u0111\u1ea1o, kh\u00f4ng c\u00f3 l\u1ef1c ngang \u0111\u1ecbnh k\u1ef3 t\u00e1c d\u1ee5ng l\u00ean \u0111ai \u1ed1c tr\u1ee5c v\u00edt d\u1eabn \u0111\u1ed9ng, kh\u00f4ng c\u00f3 s\u1ef1 rung l\u1eafc theo tr\u1ee5c Z tr\u00ean b\u1ec1 m\u1eb7t in.<\/p>\n

\u0110i\u1ec1u quan tr\u1ecdng l\u00e0, kh\u1edbp n\u1ed1i Oldham c\u0169ng kh\u00f4ng t\u1ea1o ra l\u1ef1c h\u01b0\u1edbng t\u00e2m n\u00e0o l\u00ean \u1ed5 tr\u1ee5c \u0111\u1ed9ng c\u01a1 v\u00e0 l\u1ef1c ngang n\u00e0o l\u00ean tr\u1ee5c v\u00edt. \u1ed4 tr\u1ee5c \u0111\u1ed9ng c\u01a1 ch\u1ec9 ch\u1ecbu c\u00e1c l\u1ef1c m\u00e0 n\u00f3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ch\u1ecbu \u0111\u1ef1ng. Tr\u1ee5c v\u00edt ch\u1ea1y th\u1eb3ng. B\u1ec1 m\u1eb7t in kh\u00f4ng xu\u1ea5t hi\u1ec7n c\u00e1c v\u1ec7t s\u1ecdc b\u1ea5t k\u1ec3 \u0111\u1ed9 l\u1ec7ch ngang gi\u1eefa tr\u1ee5c \u0111\u1ed9ng c\u01a1 v\u00e0 tr\u1ee5c v\u00edt l\u1edbn \u0111\u1ebfn m\u1ee9c n\u00e0o \u2014 cho \u0111\u1ebfn gi\u1edbi h\u1ea1n \u0111\u1ed9 l\u1ec7ch \u0111\u1ecbnh m\u1ee9c c\u1ee7a kh\u1edbp n\u1ed1i.<\/p>\n

\n \"Kh\u1edbp
C\u01a1 c\u1ea5u \u0111\u0129a tr\u01b0\u1ee3t li\u00ean t\u1ee5c h\u1ea5p th\u1ee5 \u0111\u1ed9 l\u1ec7ch ngang trong su\u1ed1t m\u1ed7i v\u00f2ng quay \u2014 tr\u1ee5c v\u00edt ch\u1ec9 ch\u1ecbu t\u00e1c \u0111\u1ed9ng c\u1ee7a chuy\u1ec3n \u0111\u1ed9ng quay, ch\u1ee9 kh\u00f4ng ph\u1ea3i chuy\u1ec3n \u0111\u1ed9ng qu\u1ef9 \u0111\u1ea1o do s\u1ef1 sai l\u1ec7ch g\u00e2y ra.<\/figcaption><\/figure>\n

\u1ee8ng d\u1ee5ng tr\u00ean c\u00e1c ki\u1ebfn \u200b\u200btr\u00fac m\u00e1y in 3D th\u00f4ng d\u1ee5ng<\/h2>\n

M\u00e1y in Cartesian (ki\u1ec3u Prusa i3, m\u00e1y in ki\u1ec3u l\u1eafc b\u00e0n in):<\/strong> C\u00e1c m\u00e1y in n\u00e0y th\u01b0\u1eddng s\u1eed d\u1ee5ng m\u1ed9t ho\u1eb7c hai tr\u1ee5c v\u00edt T8 (\u0111\u01b0\u1eddng k\u00ednh 8 mm, b\u01b0\u1edbc ren 2 mm) \u0111\u01b0\u1ee3c d\u1eabn \u0111\u1ed9ng b\u1edfi \u0111\u1ed9ng c\u01a1 b\u01b0\u1edbc NEMA 17 v\u1edbi tr\u1ee5c \u0111\u1ea7u ra 5 mm. Kh\u1edbp n\u1ed1i Oldham thay th\u1ebf kh\u1edbp n\u1ed1i m\u1ec1m ti\u00eau chu\u1ea9n t\u1ea1i \u0111i\u1ec3m n\u1ed1i gi\u1eefa \u0111\u1ed9ng c\u01a1 v\u00e0 tr\u1ee5c v\u00edt. Th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt ch\u00ednh l\u00e0 \u0111\u01b0\u1eddng k\u00ednh l\u1ed7 d\u1eabn \u0111\u1ed9ng 5 mm (tr\u1ee5c \u0111\u1ed9ng c\u01a1) v\u00e0 \u0111\u01b0\u1eddng k\u00ednh l\u1ed7 b\u1ecb d\u1eabn \u0111\u1ed9ng 8 mm (tr\u1ee5c v\u00edt), v\u1edbi kh\u1ea3 n\u0103ng l\u1ec7ch ngang t\u1ed1i thi\u1ec3u 0,5 mm \u0111\u1ec3 \u0111\u00e1p \u1ee9ng dung sai c\u0103n ch\u1ec9nh \u0111i\u1ec3n h\u00ecnh tr\u00ean c\u00e1c gi\u00e1 \u0111\u1ee1 \u0111\u1ed9ng c\u01a1 \u0111\u01b0\u1ee3c in ho\u1eb7c d\u1eadp.<\/p>\n

M\u00e1y in CoreXY (ki\u1ec3u Voron, RatRig, BambuLab):<\/strong> Ki\u1ebfn tr\u00fac CoreXY th\u01b0\u1eddng \u0111i\u1ec1u khi\u1ec3n tr\u1ee5c Z b\u1eb1ng hai \u0111\u1ebfn b\u1ed1n v\u00edt me d\u1eabn \u0111\u1ed9ng \u0111\u01b0\u1ee3c \u0111\u1ed3ng b\u1ed9 h\u00f3a b\u1eb1ng c\u01a1 h\u1ecdc ho\u1eb7c th\u00f4ng qua c\u00e1c \u0111\u1ed9ng c\u01a1 b\u01b0\u1edbc \u0111\u1ed9c l\u1eadp v\u1edbi h\u1ec7 th\u1ed1ng c\u00e2n b\u1eb1ng Z \u0111i\u1ec7n t\u1eed (c\u00e2n b\u1eb1ng gi\u00e0n b\u1ed1n tr\u1ee5c ho\u1eb7c t\u01b0\u01a1ng t\u1ef1). Trong c\u00e1c h\u1ec7 th\u1ed1ng n\u00e0y, m\u1ed7i kh\u1edbp n\u1ed1i v\u00edt me d\u1eabn \u0111\u1ed9ng-\u0111\u1ed9ng c\u01a1 \u0111\u1ec1u \u0111\u01b0\u1ee3c h\u01b0\u1edfng l\u1ee3i t\u1eeb kh\u1edbp n\u1ed1i Oldham v\u00ec nh\u1eefng l\u00fd do t\u01b0\u01a1ng t\u1ef1 nh\u01b0 m\u00e1y in Cartesian, v\u1edbi l\u01b0u \u00fd b\u1ed5 sung l\u00e0 c\u00e1c \u0111\u1ed9ng c\u01a1 Z \u0111\u1ed9c l\u1eadp y\u00eau c\u1ea7u kh\u1edbp n\u1ed1i \u0111\u1ec3 b\u00f9 \u0111\u1eafp b\u1ea5t k\u1ef3 sai l\u1ec7ch c\u0103n ch\u1ec9nh n\u00e0o gi\u1eefa b\u1ed1n v\u1ecb tr\u00ed l\u1eafp \u0111\u1eb7t \u0111\u1ed9ng c\u01a1.<\/p>\n

M\u00e1y in Delta:<\/strong> Ki\u1ebfn tr\u00fac Delta kh\u00f4ng s\u1eed d\u1ee5ng v\u00edt me cho chuy\u1ec3n \u0111\u1ed9ng ch\u00ednh \u2014 ch\u00fang s\u1eed d\u1ee5ng d\u00e2y \u0111ai truy\u1ec1n \u0111\u1ed9ng tr\u00ean c\u00e1c thanh ray tuy\u1ebfn t\u00ednh th\u1eb3ng \u0111\u1ee9ng. Kh\u1edbp n\u1ed1i Oldham th\u01b0\u1eddng kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong h\u1ec7 th\u1ed1ng chuy\u1ec3n \u0111\u1ed9ng ch\u00ednh c\u1ee7a m\u00e1y in Delta. Tuy nhi\u00ean, n\u1ebfu m\u00e1y in Delta s\u1eed d\u1ee5ng b\u00e0n in d\u1eabn \u0111\u1ed9ng b\u1eb1ng v\u00edt me (m\u1ed9t s\u1ed1 m\u00e1y s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng c\u00e2n b\u1eb1ng b\u00e0n in), th\u00ec c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 \u0111\u1ed9 rung l\u1eafc tr\u1ee5c Z v\u1eabn \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng.<\/p>\n

M\u00e1y in nh\u1ef1a (MSLA\/DLP):<\/strong> Tr\u1ee5c Z c\u1ee7a m\u00e1y in nh\u1ef1a n\u00e2ng h\u1ea1 b\u00e0n in th\u00f4ng qua h\u1ec7 th\u1ed1ng truy\u1ec1n \u0111\u1ed9ng v\u00edt me, v\u1edbi \u0111\u1ed9 ph\u00e2n gi\u1ea3i l\u1edbp in th\u01b0\u1eddng n\u1eb1m trong kho\u1ea3ng 10 \u0111\u1ebfn 50 micron. \u1ede \u0111\u1ed9 ph\u00e2n gi\u1ea3i n\u00e0y, hi\u1ec7n t\u01b0\u1ee3ng rung l\u1eafc tr\u1ee5c Z kh\u00f4ng ch\u1ec9 g\u00e2y m\u1ea5t th\u1ea9m m\u1ef9 m\u00e0 c\u00f2n c\u00f3 th\u1ec3 g\u00e2y t\u00e1ch l\u1edbp ho\u1eb7c th\u1eadm ch\u00ed l\u00e0m h\u1ecfng ho\u00e0n to\u00e0n b\u1ea3n in. V\u00ec l\u00fd do n\u00e0y, kh\u1edbp n\u1ed1i Oldham ng\u00e0y c\u00e0ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u h\u01a1n trong c\u00e1c m\u00e1y in MSLA cao c\u1ea5p.<\/p>\n

Ch\u1ecdn kh\u1edbp n\u1ed1i Oldham ph\u00f9 h\u1ee3p cho m\u00e1y in c\u1ee7a b\u1ea1n<\/h2>\n
\n
\n\n\n\n\n\n\n\n\n\n
Lo\u1ea1i m\u00e1y in<\/th>\nTr\u1ee5c \u0111\u1ed9ng c\u01a1<\/th>\nTr\u1ee5c v\u00edt<\/th>\n\u0110\u01b0\u1eddng k\u00ednh ngo\u00e0i kh\u1edbp n\u1ed1i \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb<\/th>\n<\/tr>\n<\/thead>\n
Prusa i3 \/ b\u1ea3n sao (T8)<\/td>\n5 mm<\/td>\n8 mm<\/td>\n20\u201325 mm<\/td>\n<\/tr>\n
Voron 2.4 \/ Trident (T8)<\/td>\n5 mm<\/td>\n8 mm<\/td>\n20\u201325 mm<\/td>\n<\/tr>\n
RatRig V-Core (T8)<\/td>\n5 mm<\/td>\n8 mm<\/td>\n20\u201325 mm<\/td>\n<\/tr>\n
\u0110\u1ecbnh d\u1ea1ng l\u1edbn (T10\/T12)<\/td>\n5\u20136,35 mm<\/td>\n10\u201312 mm<\/td>\n28\u201332 mm<\/td>\n<\/tr>\n
Nh\u1ef1a MSLA (T8)<\/td>\n5 mm<\/td>\n8 mm<\/td>\n20 mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

\u0110\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng m\u00e1y in 3D, h\u00e3y ch\u1ecdn lo\u1ea1i kh\u1edbp n\u1ed1i ki\u1ec3u k\u1eb9p thay v\u00ec ki\u1ec3u v\u00edt \u0111\u1ecbnh v\u1ecb b\u1ea5t c\u1ee9 khi n\u00e0o thi\u1ebft k\u1ebf kh\u1edbp n\u1ed1i cho ph\u00e9p. Kh\u1edbp n\u1ed1i ki\u1ec3u v\u00edt \u0111\u1ecbnh v\u1ecb c\u00f3 th\u1ec3 l\u00e0m l\u00f5m b\u1ec1 m\u1eb7t tr\u1ee5c v\u00edt theo th\u1eddi gian, g\u00e2y kh\u00f3 kh\u0103n khi th\u00e1o tr\u1ee5c v\u00edt \u0111\u1ec3 b\u1ea3o tr\u00ec, v\u00e0 ch\u00fang cung c\u1ea5p l\u1ef1c k\u1eb9p kh\u00f4ng \u1ed5n \u0111\u1ecbnh. H\u1ea7u h\u1ebft c\u00e1c kh\u1edbp n\u1ed1i Oldham th\u01b0\u01a1ng m\u1ea1i d\u00f9ng cho m\u00e1y in 3D \u0111\u1ec1u c\u00f3 l\u1ed7 k\u1eb9p v\u1edbi c\u1ea3 hai c\u1ea5u h\u00ecnh 5 mm v\u00e0 8 mm.<\/p>\n

M\u1eb9o c\u00e0i \u0111\u1eb7t m\u00e1y in 3D<\/h2>\n

Kh\u00f4ng \u0111\u01b0\u1ee3c si\u1ebft qu\u00e1 ch\u1eb7t ph\u1ea7n kh\u1edbp n\u1ed1i ph\u00eda tr\u1ee5c v\u00edt.<\/strong> Tr\u1ee5c v\u00edt d\u1eabn h\u01b0\u1edbng cho m\u00e1y in 3D th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng th\u00e9p kh\u00f4ng g\u1ec9 v\u1edbi b\u1ec1 m\u1eb7t \u0111\u01b0\u1ee3c x\u1eed l\u00fd m\u1ec1m. Vi\u1ec7c k\u1eb9p qu\u00e1 m\u1ea1nh b\u1eb1ng tr\u1ee5c v\u00edt \u0111\u1ecbnh v\u1ecb c\u00f3 th\u1ec3 l\u00e0m bi\u1ebfn d\u1ea1ng b\u1ec1 m\u1eb7t tr\u1ee5c v\u00edt ho\u1eb7c g\u00e2y ra \u0111\u1ed9 l\u1ec7ch t\u00e2m. H\u00e3y s\u1eed d\u1ee5ng m\u00f4-men xo\u1eafn k\u1eb9p t\u1ed1i thi\u1ec3u \u0111\u1ec3 tr\u00e1nh tr\u01b0\u1ee3t \u2014 m\u00f4-men xo\u1eafn truy\u1ec1n b\u1edfi b\u1ed9 truy\u1ec1n \u0111\u1ed9ng tr\u1ee5c Z r\u1ea5t th\u1ea5p (th\u01b0\u1eddng nh\u1ecf h\u01a1n 0,1 Nm), v\u00ec v\u1eady ch\u1ec9 c\u1ea7n m\u1ed9t l\u1ef1c k\u1eb9p r\u1ea5t nh\u1ecf.<\/p>\n

Cho ph\u00e9p v\u00edt chuy\u1ec3n \u0111\u1ed9ng t\u1ef1 do theo tr\u1ee5c.<\/strong> Tr\u1ee5c v\u00edt trong h\u1ea7u h\u1ebft c\u00e1c m\u00e1y in 3D kh\u00f4ng b\u1ecb gi\u1edbi h\u1ea1n theo tr\u1ee5c \u1edf \u0111\u1ea7u \u0111\u1ed9ng c\u01a1 \u2014 n\u00f3 \u0111\u01b0\u1ee3c gi\u1edbi h\u1ea1n \u1edf ph\u00eda tr\u00ean b\u1edfi \u0111ai \u1ed1c tr\u1ee5c v\u00edt v\u00e0 \u1edf ph\u00eda d\u01b0\u1edbi ch\u1ec9 b\u1edfi tr\u1ecdng l\u01b0\u1ee3ng c\u1ee7a ch\u00ednh n\u00f3. \u0110\u1ea3m b\u1ea3o kh\u1edbp n\u1ed1i Oldham kh\u00f4ng k\u1eb9p ch\u1eb7t tr\u1ee5c v\u00edt v\u00e0o \u1ed5 tr\u1ee5c \u0111\u1ed9ng c\u01a1 theo tr\u1ee5c. Gi\u1eef nguy\u00ean khe h\u1edf nh\u1ecf theo tr\u1ee5c gi\u1eefa m\u1eb7t \u0111\u0129a v\u00e0 m\u1eb7t moay\u01a1 nh\u01b0 \u0111\u01b0\u1ee3c m\u00f4 t\u1ea3 trong h\u01b0\u1edbng d\u1eabn l\u1eafp \u0111\u1eb7t.<\/p>\n

Kh\u00f4ng \u0111\u01b0\u1ee3c c\u1ed1 g\u1eafng c\u0103n ch\u1ec9nh \u0111\u1ed9ng c\u01a1 sao cho th\u1eb3ng h\u00e0ng v\u1edbi v\u00edt.<\/strong> \u0110i\u1ec3m m\u1ea5u ch\u1ed1t l\u00e0: kh\u00f4ng gi\u1ed1ng nh\u01b0 c\u00e1c kh\u1edbp n\u1ed1i c\u1ee9ng ho\u1eb7c xo\u1eafn \u1ed1c, kh\u00f4ng c\u1ea7n ph\u1ea3i m\u1ea5t th\u1eddi gian \u0111\u1ec3 c\u0103n ch\u1ec9nh \u0111\u1ed9ng c\u01a1 ch\u00ednh x\u00e1c v\u1edbi tr\u1ee5c v\u00edt. Kh\u1edbp n\u1ed1i Oldham s\u1ebd t\u1ef1 \u0111\u1ed9ng h\u1ea5p th\u1ee5 \u0111\u1ed9 l\u1ec7ch. Ch\u1ec9 c\u1ea7n g\u1eafn \u0111\u1ed9ng c\u01a1 v\u00e0o t\u1ea5m \u0111\u1ebf, l\u1eafp kh\u1edbp n\u1ed1i, v\u00e0 \u0111\u1ed9 l\u1ec7ch s\u1ebd \u0111\u01b0\u1ee3c x\u1eed l\u00fd t\u1ef1 \u0111\u1ed9ng. Vi\u1ec7c d\u00e0nh h\u00e0ng gi\u1edd \u0111\u1ec3 ch\u00eam th\u00eam mi\u1ebfng \u0111\u1ec7m cho \u0111\u1ed9ng c\u01a1 l\u00e0 kh\u00f4ng c\u1ea7n thi\u1ebft khi s\u1eed d\u1ee5ng kh\u1edbp n\u1ed1i Oldham.<\/p>\n

\n \"L\u1eafp
Vi\u1ec7c l\u1eafp \u0111\u1eb7t r\u1ea5t \u0111\u01a1n gi\u1ea3n: kh\u00f4ng c\u1ea7n c\u0103n ch\u1ec9nh ch\u00ednh x\u00e1c. L\u1eafp \u0111\u1ed9ng c\u01a1, l\u1eafp kh\u1edbp n\u1ed1i, v\u00e0 \u0111\u0129a tr\u01b0\u1ee3t s\u1ebd t\u1ef1 \u0111\u1ed9ng x\u1eed l\u00fd m\u1ecdi \u0111\u1ed9 l\u1ec7ch c\u00f2n l\u1ea1i.<\/figcaption><\/figure>\n

Nh\u1eefng c\u1ea3i ti\u1ebfn c\u00f3 th\u1ec3 mong \u0111\u1ee3i<\/h2>\n

Ng\u01b0\u1eddi d\u00f9ng n\u00e2ng c\u1ea5p t\u1eeb kh\u1edbp n\u1ed1i xo\u1eafn \u1ed1c linh ho\u1ea1t l\u00ean kh\u1edbp n\u1ed1i Oldham trong h\u1ec7 th\u1ed1ng truy\u1ec1n \u0111\u1ed9ng tr\u1ee5c Z th\u01b0\u1eddng xuy\u00ean b\u00e1o c\u00e1o nh\u1eefng c\u1ea3i ti\u1ebfn sau:<\/p>\n