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發(fā)表于 2009-3-17 23:04:39
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This guy basically has no experience, and you guys are completely training him over the internet for free, and somewhat awkwardly I might add.
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He started out with all kinds of monumentally stupid ideas about calibrating his machine himself, now we can easily see that he can't even properly operate a - y3 ^* D! ?2 A7 m. F3 q( L
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cmm talk about programming one. - }7 c6 I* p; I) ]
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I've sat buy and read a dozen threads started by him asking about ridiculously basic cmm concepts.9 J! F* g" M, V) K5 h5 A3 [, H
# e5 K9 d% W V0 a8 \6 dMaybe I would be more receptive if he came in here from the start and said "hey guys, I know absolutely zero about cmm's, but I want to be just like 5 E& i4 P) l. M" i) o/ O3 O! d: ~
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you...can you help me? Where do I start?" But instead I find myself continually astounded by the questions he is asking. It is so compelling to read just so - J4 t; {& `% c
8 _6 \+ r* a6 b8 Pthat I understand it fully when I get to the inevitable end of this story involving a major rejection and impending bankruptcy of some poor company he works
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0 ]4 L6 S* [& V' |/ L6 ?for. 2 v2 j2 j6 |" \2 t9 E8 a
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The only possible outcome I can see is the company he works for ending up in financial ruins as he "programs" a part and their setup adjusts the parts so 7 U# R* T4 Z$ g" W' B% {9 z) k8 r0 h
" ]: w R# ]$ c% g6 x" b; cthat they "look good" on the cmm reports and they ship parts to customers, ultimately destined for rejection or worse failure during operation. I honestly
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' Q% }. l+ l! ^7 ]+ {& Jpray when I read his posts that he doesn't make something like steering or braking components, seat belt retractors.....the list goes on and on. " q7 W& {9 K$ C' w# x* q6 c3 R
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5 C) E( {6 }, ]; l$ Y5 A/ Y+ ]7 b! r這一個人基本上沒有經(jīng)驗,而你們正在免費通過互聯(lián)網(wǎng)完整培訓(xùn)他,我可能稍微增加點難度。 / O2 z8 I( H+ I7 x# I
& g" e8 O' E% E0 P8 l他從自己校正他的機器的各種非常愚蠢的主意開始,現(xiàn)在我們?nèi)菀卓闯鏊粋€甚至不能正確操作cmm的人。
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. _* N# U7 H! q; |我做出犧牲,閱讀一堆章節(jié)并被他開始問各種荒謬最基本的cmm 觀念。0 C/ |$ o/ q5 B9 i8 ^
: \7 v0 @7 K: m" o可能我應(yīng)該更加接納他剛進來就說:我基本對cmm了解為零,但是我成為你那樣...你能幫助我嗎?我從那里開始?但是我發(fā)現(xiàn)自己不停的被問的吃驚.我完全理解,當(dāng)我得到這個故事必
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+ l$ i% |( u& l, ?. x然的包括他工作的公司必然是非常容易被淘汰和即將發(fā)生倒閉
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我看他服務(wù)的公司最后的結(jié)果是財務(wù)破產(chǎn)作為他'程序'的一部分他們計劃調(diào)整這部分以便他們在cmm報告中看起來好點.他們把這個給客戶.最多被拒絕或者在使用中完全失敗.當(dāng)我7 O( c/ A+ W6 l$ j. K
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讀他那職位的時候,我真誠的起到他不是做方向盤或者轉(zhuǎn)向制動器,安全帶....這個列表繼續(xù). v, [6 P- l2 A, h/ K. ?2 Z2 u v
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$ q% w% c/ a, e% O7 RI (like many of you) am a professional fault-finder by trade.
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3 z2 P* I$ d- o. w8 ]% G' c3 YLet's see if I can find any errors or problems with anything that Section has stated in his last post.3 _" o, J& u2 X7 b7 l5 Y2 G
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1 P7 N& @7 K0 X; M& uNope, can't find a single thing in error. I'd say that he's hit the nail squarely on the head.3 ~/ c q$ z* i$ {
4 K$ }1 x$ N; b/ [( N& ]In fact, I've wondered several times in the past if this guy was really an experienced CMM geek who's just messin' with our heads, but I'm convinced that 7 x' s' P5 ?; C+ U
N# j4 W* F/ p7 y! `he's on the level, which is quite disturbing. His situation could be used as an excellent case study about why CMM geeks should ALL be certified - JUST LIKE
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7 t; |6 q0 M* ^; Y. r/ B( JTHE MACHINES HAVE TO BE!!!!* y0 L" @" l- d4 d( R1 P
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Analogy time: Why shouldn't it be good enough if a VEHICLE is inspected, registered and licensed? Why should the OPERATOR have be trained and licensed? The : G( D+ Z( L( A7 x# p& V' E
( v( i6 Y+ I8 E+ C( C8 Acar's just fine, and that's the thing that does all the work! The operator just goes along for the ride, right? What could possibly go wrong?2 w: H4 n8 j' {, {4 w
我(象你們中很多人一樣)是一個經(jīng)過專門培訓(xùn)對質(zhì)量吹毛求疵的專業(yè)人士。 7 y' q- Y6 L' o' c: r
如果我能找任何的錯誤或的問題任何事,讓我們見到那一個區(qū)段已經(jīng)在他的最后職位中陳述。
/ @7 p) M _( B4 ^) [' i不,不能在錯誤中找一些線索。 我將會說,他腦子壞掉了。; I, A N3 h, f
- {2 y9 T: a. P5 c O2 Q7 `事實上,我在過去懷疑過很長時間這個家伙是不是真的是一個有經(jīng)驗的cmm怪人,他僅僅是打亂我們的思路,但是我確認他是一個卓越的人.這是不用討論的,他的情況應(yīng)該被當(dāng)作一個% e. K" B6 n' o$ O
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優(yōu)秀的學(xué)習(xí)案例:為什么鑒定為cmm怪人,就想機器一樣9 Q2 |& t: K) Q7 e% C T
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類似:如果一輛車輛已經(jīng)被檢查,登記以及許可,它為什么不是最佳狀態(tài)? 為什么那操作員應(yīng)該被訓(xùn)練而且得到許可的? 小車還好,所有的工作都一樣! 操作員僅僅是湊湊熱鬧9 [7 ?& j4 \6 L- |* m# N
. k, V0 F) Y$ C I,對不對? 怎么會出錯?) y) E0 {0 a. Y+ R4 E5 Z
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hi,
" F7 N' L+ `, J, {8 Hi think you guys are fedup from me.i am really sorry for that.But appreciate the co-operation of you people.
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我認為,你們是從我這郁悶.我真的抱歉。但是還是感激幫助者。 + _' s6 K2 ^$ l5 K0 G2 a8 v
: R- r, W$ o: ~5 Tmy machine is measuring a standard ring gage 3 microns less.is there any option in the metrolog to compensate it manually or i have to add up in the results v; @( v' e$ {3 j5 x! \
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at the end?
" d! L* y) V+ r, C* k( B% T我的機器測量一個標(biāo)準(zhǔn)環(huán)規(guī)小了3微米.是不是有選項去手動補償或我不得不在最后把它加入到結(jié)果?
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+ y3 o. i/ m; V. k9 rIs that 3um less than nominal, or 3um less than the calibrated result for the gauge ?
* j: K0 n$ P5 K4 ~& n% K3微米是不是小于名義值,或3微米小于環(huán)規(guī)的校準(zhǔn)結(jié)果? M$ k3 `$ N: H$ ?5 u
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! F' i. ]/ f: Tits the nominal.As its has been engrved on the standard for example 10 mm (+9 microns).cmm is reading it as 10.06 mm. 6 W3 @ J+ v5 f, [& ~
正常。如果已經(jīng)被標(biāo)定例如10mm(+9mm)。那么cmm 讀數(shù)為10.06mm。 ) Q) R# h& F' L0 L/ y
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3 l9 B H/ ?+ A3 C# b* f1 M# x10.06 is plus sixty microns. Six microns is .006. 7 k, |5 M3 n9 e/ t, R9 Q$ v8 ~
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Perhaps you meant 10.006?
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Is your cmm nc or manual? If it's manual, my advice would be to give up and buy a real cmm. If it's nc then make sure you have a program to calibrate the
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( [" ?& x, T. H5 p" y& hstylus. Make sure the measurements on the masterball are taken properly. Make sure the points are properly spaced and contacting the masterball at the & \1 r8 I+ G2 C5 z* G( W; j4 b9 C
, @ c) @# a9 H0 hoptimal "attack angle". 5 p3 X5 P/ _7 P, l3 q
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Once you have a program for probe calibration then you should do some testing. Calibrate the stylus and inspect the ring gage several times. Re-position the
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ring gage between runs. You may want to re-clean it between runs but be careful not to affect the temperature. Then, repeat this whole process several times , L$ f( F% L3 Q0 B; D2 J3 c# P2 x& {
" w1 b# h, @5 [4 G(including re-calibrating the stylus). If the variance you see here is more than .003mm (i expect it will be), then the 3 microns you are seeing is noise. If
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6 e# Y- s' \3 t+ w" [' a; i, b) jit's more than .03mm then there's probably something wrong.
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If it's somewhere in between and you need better, if possible, try a shorter stylus.
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10.06是60個微米。六個微米是.006 。
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可能你認為是10.006?3 r; r, B- v) _4 {) {
你的cmm是自動還是手動? 如果它是手動,我的建議是放棄它同時再買臺真正的cmm 。如果它是自動, 那么確信你有建議一個探針校正程序。 確定在標(biāo)準(zhǔn)球上的測量正確的。 確; c* s/ J" P3 X" ^0 C( [" s
* l; F/ W' \' U5 P* K- x Y定點是以正確的位置和最佳的法線角度去接觸標(biāo)準(zhǔn)球.- H9 _) K- _8 ~! w, \
# L) O" M/ z/ u3 ]7 p* T一旦你有一個校準(zhǔn)測頭的程序,你應(yīng)該做一些測試.校準(zhǔn)探針和檢查環(huán)規(guī)多次。測量中重新調(diào)整環(huán)規(guī)位置。在測量中你可能想重復(fù)調(diào)整它但是小心不要影響它的溫度
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然后,重復(fù)這整個程序多次(包括重復(fù)校準(zhǔn)探針) 如果在這里你見到的差異超過.003mm(我預(yù)計它會), 那么你看到的這3個微米是噪音。如果它是超過.03mm, 那么那些地方可能# u$ n4 y7 D, h# h5 `
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如果它處于中間,同時你想更要的效果.如果可能的,試一個較短的測針。
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Agreed Ken,
& Q/ C4 e! q d2 ^The biggest ball dia with the shortest shank length is always the way to go. A TP200 instead of a TP2 or 20 would reduce the lobing effect also, but I
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realise the choice is not always there.
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I always set my alignment plane through the centerline of the ring ( cylinder measurement ) as , although these gauges are usually square from the cylinder
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to the outer surfaces, you just never know for sure. 3 z6 b, u, o& c
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The other matters to add up are, 7 f# v+ I' v: f8 u2 Z; L
the uncertainty of measurement of the machine : 2 ]/ p' t4 {1 b1 m7 B
the actual calibration result for the ring gauge ( not the engraved size ): 0 O6 r9 p. Q6 }0 l& [
the algorithm used for the dia result :7 @9 P% v! u6 f: d5 G1 @0 _
room conditions ( temp humidity cleanliness ) :
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' R3 g& P1 Y2 p0 DGood luck G.P. in finding your 3 microns. They're in there somewhere.
# P( b' K, N/ i4 n同意肯恩,
2 f9 B" B' o$ i/ {( r0 h這個方法最好是用最大的球莖和最短的探針長度。用TP200代替TP2或tp20會也減小效果,但是我認為問題并不在那里。 ( B: I+ k' D/ f0 r. U1 U }# u; {
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我總是通過環(huán)規(guī)的中心設(shè)置我的基準(zhǔn)面(測量圓柱),雖然這些環(huán)規(guī)從圓柱到外圓面是非常一致的,單你僅僅是不確 $ X1 u. o1 h- o2 k A) J
) B/ j2 e8 m% F, k: t y2 a! L% d其他因素加起來是,
( Q( O' z) I( s機器的測量的不確定:
" o( @/ U' v: c4 u- V; g3 b環(huán)規(guī)實際的校準(zhǔn)結(jié)果(不是被標(biāo)的值): 9 n, s, ~$ U/ O* b; Z. l
結(jié)果圓的運算法則:' F: @& m: F/ }! @% A$ G# J
房間環(huán)境(臨時濕度) :# I2 m) w$ L) G4 R/ I
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G.P找到的3微米誤差就在里面,祝你幸運!
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Is it necessary to align a ring gage beofre the dia measurement.I have read somewhere that we dun need to make alignment for dia measurements.is it right?
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6 t6 S7 Q s9 S' D+ i* Q; A在直徑測量之前有必要定位環(huán)規(guī)。我已經(jīng)某處讀我們需要制造 對準(zhǔn)直徑測量.是嗎?
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It's only my opinion G.P. , but if your trying to find your 3 microns, % \; t* F$ V I0 r4 I
& V- M+ x$ G6 h7 `, sthen use all means at your disposal to measure each point perpendicular to the surface.
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That includes aligning the ring gauge before measuring for dia.' q6 a" @7 D2 D8 f4 z
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As a matter of interest, what size does the calibration certificate say the ring gauge is ?
7 `* |- i% ` ?5 d1 F! s! j, d它只是我個人的意見 G.P. ,如果你想嘗試達到3個微米, 8 ^$ K& X( w$ c- |
' s$ m# y, h$ x% B: ^" x4 I' t使用所有的方法(盡力而為),在測量任意一個點都要垂直于表面。 8 L4 v2 \3 U# N& x0 `% ?! j' b
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那包括在測量直徑之前排校準(zhǔn)環(huán)規(guī)。
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3 t, ~+ ^" M6 B6 Z- J稍微有點好奇,環(huán)規(guī)校準(zhǔn)報告說環(huán)規(guī)尺寸是所少? 6 l+ W& B7 y! ~2 K9 X+ @
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! Z6 z8 M# y, D. _$ [+ AI would measure it as a cylinder. Set my coordinate to that cyl. & measure circles incrementally in the ring gage. 1 x" A: C4 Z; Q( E+ J0 z
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我會把它作為一個圓柱來測量。設(shè)定我的坐標(biāo)系為圓柱坐標(biāo)系同時在環(huán)規(guī)中逐漸提高測量圓* d. y; f% y/ V1 k" g3 d0 O
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: G `4 I0 M% j! l3 ~/ z2 c& IYou are chasing 3um error in a diameter measurement?!
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0 X0 C7 h0 [6 p" j8 gWhat type of machine? Manual or CNC
: `- D8 p" J) p' iWhat type of touch probe? TP20, TP2, SP25, TP200
, S6 s5 {2 G T& M; U: j4 W0 ZWhat length is the stylus? 10mm 20mm 100mm
- B9 k, v. R+ |9 O8 E1 d5 L, y9 @What is the temperature in the room?
' y7 s- o' q) {5 [% R* ]3 O6 |What diameter is the ring gauge?
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Let's face it... 3um (0.003) is not a significant error, if you have 1 person standing near the machine breathing really heavy and the next day there are 5
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9 ?. N* `: N8 N" cpeople breathing heavy it can effect your measurement.
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你試圖測量一個直徑只有3微米的偏差?!2 T0 e1 N' J: k9 s
, d7 m' s5 @' A; K哪類機器?手動或自動
/ M, [, t% |* k9 k% a哪類探頭?TP20,TP2,SP25, TP200
' K2 N. |8 E. j) j& a探針長度為多少? 20 毫米 10 毫米 100 毫米
4 C9 w4 u) J! H+ d/ G房間中,溫度多少?
; `3 Z1 r3 p+ u環(huán)規(guī)直徑為多少?7 P5 Y4 ]. p+ ^5 I
8 `4 n7 c/ o; S1 K讓我們正視它。3 um(0.003) 并不重要,如果機器的附近站立的1個人呼吸 真和明天5個人呼吸都能影響你的測量。 |
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