datums and three plane concepts-geometrical dimensioning & tolerancing
TRANSCRIPT
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7/23/2019 Datums and Three Plane Concepts-Geometrical Dimensioning & Tolerancing
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D@TVI] @GD TBF
TB_FF ^K@GF MAGMF^T]
Tr`hghgc OyJhsbar Ob`th`
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7/23/2019 Datums and Three Plane Concepts-Geometrical Dimensioning & Tolerancing
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D`tui
@ d`tui hs ` pahgt+ khgf+ pk`gf+ ar atbfr
cfaiftrhm`k sure`mf+ erai wbhmb dhifgshags `rf
if`surfd wbfg sa spfmhehfd+ ar ta wbhmbcfaiftrhm`k takfr`gmfs `rf rfefrfgmfd' @ d`tui b`s
`g fx`mt eari+ `gd rfprfsfgts `g fx`mt ar ehxfd
kam`thag+ ear purpasfs ae i`gue`mturf arif`surfifgt
?
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7/23/2019 Datums and Three Plane Concepts-Geometrical Dimensioning & Tolerancing
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D`tui Ef`turf
@ d`tui ef`turf hs ` ef`turf ae ` p`rt+ sumb `s `gfdcf+ ` sure`mf+ ar ` bakf+ wbhmb earis tbf o`shs ear
` d`tui+ ar hs usfd ta fst`okhsb tbf kam`thag ae `
d`tui
=
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7/23/2019 Datums and Three Plane Concepts-Geometrical Dimensioning & Tolerancing
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Tbfarfthm`k D`tui#s
Truf d`tuis `rf tbfarfthm`k `s d`tui ef`turfs `rf
mrf`tfd oy i`gue`mturhgc'
Fvfg tbfsf sure`mfs `rf gat pfrefmt cfaiftrhm`k
sure`mfs+ out tbfy `rf hgtfgdfd ta of ae sueehmhfgtky bhcb
qu`khty tb`t `gy frrars tb`t i`y hgtradumf `rf
hgshcghehm`gt hg maip`rhsag whtb p`rt takfr`gmfs'
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D@TVI] @GD TBF TB_FF ^K@GF MAGMF^T
Cfaiftrhm`k eari takfr`gmfs sumb `s str`hcbtgfss %
ek`tgfss rfefr ta ugrfk`tfd khgfs `gd sure`mfs+ da gat
rfquhrf usf ae d`tuis'
Arhfgt`thag `gd kam`thag`k takfr`gmfs rfefr ta rfk`tfd
ef`turfs'
Vsu`kky agky agf d`tui hs rfquhrfd ear arhfgt`thag
purpasfs'
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7/23/2019 Datums and Three Plane Concepts-Geometrical Dimensioning & Tolerancing
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D@TVI] @GD TBF TB_FF ^K@GF MAGMF^T
^ashthag`k rfk`thagsbhps i`y rfquhrf ` d`tui systfi
magshsthgc ae twa ar tbrff d`tuis'
Tbfsf `rf dfshcg`tfd `s prhi`ry+ sfmagd`ry %tfrth`ry d`tuis'
Tbfsf `rf rfefr ta `s tbrff pk`gf d`tui
systfi!d`tui rfefrfgmf systfi wbfg d`tuis `rf
iutu`kky pfrpfgdhmuk`r sure`mfs'
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7/23/2019 Datums and Three Plane Concepts-Geometrical Dimensioning & Tolerancing
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^rhi`ry D`tui
3
He tbf prhi`ry d`tui hs ` ek`t sure`mf+tbfarfthm`kky ihghiui tbrff bhcb spats ag tbf
ek`t sure`mf whkk maif hg magt`mt whtb tbf
sure`mf ae c`ucf'
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7/23/2019 Datums and Three Plane Concepts-Geometrical Dimensioning & Tolerancing
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]fmagd`ry d`tui
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He tbf p`rt+ wbhkf kyhgc ag tbf prhi`ry pk`gf+ hs oraucbt
hgta magt`mt whtb tbf sfmagd`ry pk`gf+ ht whkk
tbfarfthm`kky taumb `t ihghiui ae twa pahgts'
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Tfrth`ry D`tui
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Tbf p`rt m`g skhdf `kagc wbhkf i`hgt`hghgc magt`mt whtb
prhi`ry % sfmagd`ry pk`gfs thkk ht magt`mts tbhrdpk`gf'
Tbf tbhrd pk`gf ofmaifs tbf tfrth`ry d`tui `gdtbfarfthm`kky taumb `t agf pahgt'
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0>
Tbrff pk`gfs magsthtutf ` d`tui systfi erai wbhmb
if`surfifgts m`g of t`jfg'
D@TVI] @GD TBF TB_FF ^K@GF MAGMF^T
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7/23/2019 Datums and Three Plane Concepts-Geometrical Dimensioning & Tolerancing
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D`tui syioaks `rf rfquhrfd ta sfrvf twa purpasfs `pfx'
Tbf o`sf ae tbf trh`gckf sbaukd of skhcbtky crf`tfr tb`g tbf
bfhcbt ae tbf kfttfrhgc usfd ag tbf dr`whgc'
D@TVI HGDHM@TA_ ]XIOAK
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D`tui ef`turf hs hdfgthehfd oy ` m`pht`k kfttfr pk`mfd hg `squ`rf er`if+ `gd maggfmtfd ta tbf d`tui hgdhm`tar syioak'
D@TVI HDFGTHEHM@THAG ]XIOAK
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^A]HTHAG AE HDFGTHEHFD D@TVI]
He twa ar iarf d`tui rfefrfgmfs `rf hgvakvfd tbfy iust of sbawghg marrfmt ardfr+ h'f' hg prhi`ry+ sfmagd`ry+ `gd tfrth`ry d`tuis'
F`mb d`tui ef`turf iust of hdfgthehfd+ ushgc ` m`pht`k kfttfr ugdfrtbf eakkawhgc mhrmuist`gmfs:
Sbfg twa ar iarf d`tui ef`turfs `rf `ssamh`tfd whtb tbf magtrakae ` shgckf ef`turf+ tbf d`tui kfttfr ar kfttfrs `rf tbfg pk`mfd hgtbf ef`turf magtrak syioak er`if oy `ddhgc `g fxtr` maip`rtifgtear f`mb d`tui rfefrfgmf'
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IVKTH^KF D@TVI EF@TV_F]
He ` shgckf d`tui hs fst`okhsbfd oy twa d`tui ef`turfs+ sumb `s
twa fgds ae ` sb`et+ tbf ef`turfs `rf f`mb hdfgthehfd oy
sfp`r`tf kfttfrs' Oatb kfttfrs `rf tbfg pk`mfd hg tbf s`if
maip`rtifgt ae tbf ef`turf magtrak syioak+ whtb ` d`sb oftwffg
tbfi'