AutoCAD 2D n©ng Cao

8/14/2019 AutoCAD 2D nng Cao

1/19

AutoCAD 2D nng cao

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Gii thiu chung tng c-ng hiu qu trong thit k v v cc bn v theo ph-ng php truyn

thng (v cc bn v 2D) chng ti bin son ti liu v m cc kho o to ringnhng ng-i bit dng AutoCAD nh-ng ch-a pht huy ht kh nng ca phn mmcng nh- ca bn thn, ni cch khc l mt kho nng cao gip cc bn khai thcAutoCAD mt cch trit hn.

Trong ti liu ny, chng ti -a ra cc kh nng ca AutoCAD mc suhn, c cc v d, cc tnh hung minh ho vn dng kh nng .

Nhng chc nng d hiu, d dng, chng tI gii thiu tn km theo vic giIthch ngn gn. i vi chc nng phc tp hn, chng tI trnh by chi tit km theophm vi s dng.

Cch trnh by trong ti liu ny c khc cht t so vi cc ti liu c bn, khngmang tnh tra cu thun ty m cn c cc tnh hung hay mc ch cng vic v cchgii quyt.Nhng khc bit gia cc phin bn -c gii thiu y .

Sch gm cc ch-ng:Ch-ng 1: Tnh hung v cc tham binlin quan.Ch-ng 2: Cc cng vic th-ng gp v cch thao tc nhanh.

Ch-ng 3: Nhm lnh tng c-ng trong Express.Ch-ng 4: Trao i d liu gia AutoCAD v cc phn mm khc.Ch-ng 5: B cc, to khung in bn v.


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AutoCAD 2D nng cao

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Ch-ng 1Tnh hung v cc tham bin lin quanTrong AutoCAD, cc ch lm vic, cc ph-ng n thc hin cng vic -c

thi hnh thng qua cc tham bin. Trong phn c s ca AutoCAD, phn ln cc thambin -c dng ch mc nh. hiu su hn v s dng chng mt cch hiuqu, chng ti -a vo ch-ng ny cc tham bin vi cc gi tr khc nhau cho ccph-ng n thc hin lnh. Khi nm -c cng dng tng gi tr ca cc tham bin,chng ta d dng x l cc tr-ng hp bt th-ng xy ra.

Trn thc t khi tin hnh mt cngvic hoc thc hin mt lnh, cc ph-ng n,cc la chn lin quan n nhng phn ci t ti nhng lnh khc. chng ta vndng mt cch ddng, d hiu, trong ch-ng ny chng ti trnh by nhng thambin no c tc ng tng th ln tt c cc lnh lin quan, cn trong cc chuyn mctheo nhm s -c trnh by ti cc chuyn mc .

I.1Mn hnh giao dinI.1.1

Tr-ng hp mt cc mc trn trnh nKhi mn hnh ch c 1 mc nh- hnh d-i y:


3/19

AutoCAD 2D nng cao

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Cch x l: Dng lnh Menug t bn phm. Hp thoi xut hin:

1- Ti Files of Type, nhn chntheo cc phin bn sau:- Cc phin bn t 2006 tr v tr-c: Menu Template (*.mnu).- AutoCAD 2007:Customize User Information (*.cui).

2- Ti o File name, chn: acad.3- Nhn nt Open, cc mc ca trnh n v cc thanh cng c thit yu li hin ln

y .

I.1.2Cho mt phng v chim ton b mn hnhLnh ny ch c trong AutoCAD 2007.

Dng lnhTrnh n: Tools Clean ScreenDng lnh:Ctrl+0 (s khng).

Thanh cng c:

Gii thchNt thanh cng c nm d-i y mn hnh.+ Sau khi ra lnh, cc thanh cng c tm n, nh-ng ch cho mt phng cha

hnh v.+ Lp li lnh, mn hnh tr li nh- bnh th-ng.Hnh d-i l mn hnh ch cha hnh v.


4/19

AutoCAD 2D nng cao

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I.1.3Kho cc thanh cng c ti v tr hin hnhLnh ny ch c trong AutoCAD 2007.

Dng lnhTrnh n: Windows Lock Location All LockedThanh cng c: AllDng lnh: lockui

Gii thchNt thanh cng c nm d-i y mn hnh.

Bnh th-ng, cc thanh cng c c th di chuyn n v tr bt k trong mn hnhtu ng-i s dng.

Khi b kho, cc thanh ny gi nguyn v tr, khng di chuyn -c. M kho: chn Unlocked.+ Khi thc hin trn dng lnh, dng nhc hin ra:

Enter new value for LOCKUI :cho gi tr mi. G s.Cc s c ngha nh- sau:0 cc thanh cng c v thanh lnh khng b kho.1 cc thanh cng c gn vo cc mp mn hnh b kho.2 cc thanh ca s b gn vo mp mn hnh hoc b neo s b kho.

4 cc thanh cng c ang nm lng l b kho.8 cc ca s ang nm lng l b kho.


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AutoCAD 2D nng cao

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I.1.4Gn dng lnh (Command Lines) vo y mn hnhTh-ng dng lnh -c gn d-i y mn hnh, nh-ng cng c th di chuyn n

n v tr bt k trong mn hnh tr tr-ng hp b kho (xem lnh trn).


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AutoCAD 2D nng cao

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Khi dng lnh ang nm trong mn hnh v, mun -a v y mn hnh, phithc hin kim tra nh- sau:

+ Nhn phi chut vo u ca thanh dng lnh.

+ nh du chn

Allow docking cho php gnvo cnh mp ca s.

+ Nhn tri chut vo u thanh lnh v di chuyn xung y mn hnh.+ Nu b du chn, thanh ny khng th gn vo cnh mp ca s.

I.1.5Cho n, hin vng dng lnh Command LinesLnh ny ch c trong AutoCAD 2007.

Dng lnhTrnh n: Tools Command LineDng lnh: Ctrl+9

Gii thchNu ang hin, ra lnh ny, vng dng lnh b n i.ang b n, ra lnh ny, vng dng lnh -c hin li.

I.1.6Mi ln ch lm vic vi mt bn vTrong AutoCAD t 2000 tr i, chng ta c th lm vic vi nhiu bn v mt lc

ti cc ca s m ng thi. Ngoi mt tch cc, c mt hn ch lm cho ng-i dngd b nhm ln. khc phc vic ny, nu cn chng ta cng c th thit lp h

thng mi ln lm vic ch m -c mt bn v duy nht.

Dng lnhTrnh n: Tools Options SystemDng lnh: sdi

Gii thch

1- Dng trnh nHp thoi hin ra, nh du chn nh- hnh d-i.


7/19

AutoCAD 2D nng cao

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+ C nh du ch cho m mt bn v duy nht.+ Khng nh du m nhiu bn v mt lc.

2- Dng trn dng lnh

Dng nhc hin ra:Enter new value for SDI :cho gi tr SDI mi. G s 0 hoc 1.

ngha cc s nh- sau:0 cho m nhiu bn v mt lc.1 ch cho m mt bn v duy nht.

I.2t cc tham bin h thngTrong AutoCAD, cc tham bin h thng th-ng t mc nh sao cho thun tin

nht cho ng-i dng. Nh-ng trong mt s tr-ng hp c ng-i t li theo s thch lm

cho ng-i khc gp kh khn khi ngi vo my . Trong phn ny chng ti gii thiuchc nng ca cc thit lp h thng th-ng gp nh h-ng n cng vic ng-idng d dng thit lp li cho cng vic tin trin tt hn.

I.2.1Cho php nhp chut p sa cc i t-ngCc i t-ng nh- ch - TEXT, bng biu TABLE, mt ct HATCH, khi

BLOCK, v.v..., rt cn thao tc no hin ra cc thng s v chnh sa chng mtcch nhanh chng.Cng c l nhp p vo i t-ng - Double click editing.

Dng lnhTrnh n: Tools Options User PreferencesDng lnh: dblclkedit

Gii thch

1- Dng trnh n+ Khi hp thoi Optionshin ra, chn mc User Preferences.

+ Ti nhm Windows Standard Behaviornhn nh du hoc b du ON trongla chn Double click editingnh- hnh d-i.


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AutoCAD 2D nng cao

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- C nh du: cho php nhy p sa i t-ng.- Khng nh du: khng cho php nhy p sa i t-ng.

2- Dng trn dng lnhDng nhc hin ra:

Enter new value for DBLCLKEDIT :cho gi trDBLCLKEDIT mi. G s 0 hoc1, hoc g ch ON hoc OFF.ngha cc s nh- sau:0 (OFF) khng cho php nhy p sa i t-ng.1 (ON) cho php nhy p sa i t-ng.

I.2.2Cc thit lp khi nhn phi chut vo i t-ngPhm phi chut cng c nhng cng dng tch cc ging nh- nhy p phm

tri. Phm phi chut th-ng lin quan n Trnh n ng. Trnh n ng l cc lnhlin quan n cc i t-ng m chng ta nhm vo lm cho thao tc c ng hn.

Dng lnhTrnh n: Tools Options User PreferencesDng lnh: shortcutmenu

Gii thch

1- Dng trnh n+ Khi hp thoi Optionshin ra, chn mc User Preferences.+ Ti nhm Windows Standard Behaviornhn nh du hoc b du ON trong

la chn Shortcut Menus in Drawing Areanh- hnh d-i.

- C nh du: nhy phi chut hin trnh n ng.Nt Right-click Customization...-c kch hot.

- Khng nh du: nhy phi chut khng hin trnh n ng.+ Nhn nt Right-click Customization...thit lp vic nhn phm phi chut.Hp thoi tip theo hin ra.Trong ny c cc nt chn cho cc nhm cng vic nh- sau:Repeat Last Command: lp li lnh va thc hin.Shortcut Menu: cho hin trnh n ng.

+ Nhn Apply& Closekt thc hp thoi ny.


9/19

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2- Dng trn dng lnhDng nhc hin ra:

Enter new value for SHORTCUTMENU : cho gi tr SHORTCUTMENU mi. Gs.ngha cc s nh- sau:0 nhy phi chut khng hin trnh n ng. Khi nhp phi chut t-ng

-ng vi phm Enter.1 nhy phi chut hin trnh n ng.2 nhy phi chut trnh n nghin ra sa i t-ng.4 nhy phi chut hin trnh n ng khi mt lnh ang thc hin. V d khi

ang v, nhp phi chut, trnh n ng hin ra chn cc ph-ng nphc v cho lnh v .

8 nhy phi chut hin trnh n ng khi mt lnh ang thc hin ch trongtr-ng hp trong lnh ny c cc ph-ng n la chn.

16 nhy phi chut hin trnh n ng khi ti hp thoi ni trn chn:Shortcut Menu.

I.2.3Tham bin Highlightchc nng

t ch nh du (bin thnh nt t) hay khng nh du cc i t-ng khibm chn trong cc lnh hiu chnh. Khng c tc dng cho la chn bnggrips.Dng lnhDng lnh: Highlight


10/19

AutoCAD 2D nng cao

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Gii thchDng nhc xut hin:New value for HIGLIGHT :Cho mt trong cc s sau:0 i t-ng -c chn khng nh du bng nt dt.1 i t-ng -c chn nh du bng nt dt.

I.2.4t ch hin th chTrong mt s tr-ng hp, do v tnh hay c , cc dng ch khng -c hin th

y , ch hin ra khung hnh ch nht. Chng ta c th khc phc bng tham binqtextmode.

Dng lnhTrnh n: Tools Options DisplayDng lnh: qtextmode

Gii thch

1- Thchin trn trnh n

Show text boundary frame onlyON (c nh du ) cho hin th hnh ch nht thay cho dng ch.OFF ch hin bnh th-ng.

Mun cho ch hin y th nhn b khng nh du.

2- Dng trn dng lnh

Dng nhc xut hin:New value for QTEXTMODE :g s. Cho mt trong cc s sau:

0 Quick Text mode off: ch hin y .1 Quick Text mode on: dng ch thay bng hnh ch nht.

I.2.5Selections chn i t-ngMc ny cho php ci t cc tham s lin quan n cc ch chn i t-ng.

Dng lnhTrnh n: Tools Options SelectionDng lnh:ddselect

Gii thch


11/19

AutoCAD 2D nng cao

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Hp thoi xut hin, chn mc Selection.

Cc nt chn c tc dng sau:Noun/Verb Selection :

ON (c nh du ) cho php bm vo i t-ng tr-c khi thc hin mt lnh(cc nt vung xut hin ti cc im cht ca i t-ng). Khi ra mt lnh,n tc ng tc th n cc i t-ng ni trn (coi nh- -c chn).

OFF khi ra mt lnh, khng c tc ng g n cc i t-ng ni trn.Use Shift to Add to Selection:

ON (c nh du) mun chn nhiu i t-ng phi gi phm Shift.OFF chn i t-ng nh- bnh th-ng.

Press and Drag:Cho php chn hai im ko thnh ca s bao quanh cc i t-ng.

Implied Window:

ON (c nh du ) cho php chn i t-ng bng cch nhn chut v kothnh ca s bao ly cc i t-ng.OFF khng nhn chut thnh ca s -c.

Object Grouping:ON (c nh du ) khi to ra cc nhm i t-ng bng lnh Group, nhn

chn vo mt thnh vin ca nhm th tt c cc thnh vin khc canhm u -c chn.

OFF chn i t-ng nh- bnh th-ng.Assosiactive Hatch:

ON (c nh du ) khi chn mt ct th c cc i t-ng lm -ng bao cng-c chn.

OFF ch chn ring phn mt ct.

I.2.6Lnh Viewres ngha

t ch thao tc nhanh v khng ch vng gii hn i vi cc lnh ZOOM,PAN v cho trn ca -ng trn, cung trn, elp ... khi ZOOM.

Dng lnhTrnh n: Tools Options DisplayDng lnh:viewres

Gii thch


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1- Dng trn trnh nHp thoi xut hin, chn mc Display.Cho gi tr vo nhp liu: Arc and circle smoothness

2- Dng trn dng lnhDng nhc:

Do you want fast zooms? : g yhoc n- n: cc lnh ZOOM, PAN, theo ch Real time khng c tc dng.- Y: cc lnh ZOOM, PAN, theo ch Real time hot ng bnh th-ng.

Enter circle zoom percent (1-20000) :cho s on to thnh cung trn tronglnhZOOM. S cng ln th -ng trn cng mn mi khi ZOOM bt k ch no v khu vc thc hin lnh ZOOM hoc PAN cng rng.

I.3Cc tin t ca lnh v lnh ngoiTrong AutoCAD, c mt s lnh thm mt s tin t s c cc ph-ng n thchin khc th-ng mt cht. Chng ti s gii thiu mt s lnh c tin t c th khaithc tt hn trong mt s tr-ng hp no .

I.3.1Hu b (Undefine) v khi phc (Redefine) tn lnh1- Lnh Undefine

Chc nng

Hu b tn mt lnh. Khi tn mt lnh b hu b, n khng cn tc dng khi lalnh ti mi ph-ng thc ra lnh (trnh n, thanh cng c, bn phm.).

Dng lnhDng lnh:undefine

Gii thchDng nhc xut hin:Command name:cho tn lnh cn hu b.Khi g xong tn lnh, t nay lnh khng cn tc dng.

2- Lnh RedefineChc nng


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Khi phc li tn mt lnh b hu b.

Dng lnhDng lnh:redefine

Gii thchDng nhc xut hin:

Command name:cho tn lnh cn cn khi phc.Khi g xong tn lnh, t nay lnh li c tc dng.

I.3.2Lnh bt u bng du chm (.) tr-c tn lnhy l lnh nguyn thy ca AutoCAD.

Phm vi: Tt c cc lnh.Trong AutoCAD cn bao hm phn mm AutoLISP lp trnh c th to ra cc

lnh mi hoc nh ngha li lnh ca AutoCAD. V d nu ai nh ngha li lnhLINE theo ca h, hoc tn lnh b hu b bng lnh UNDEFINE, khi chng ta ralnh LINE, cc b-c thchin khng phi l v on thng m l lm mt vic g khc hoc khng th thc hin lnh. Lc gi li lnh ng chc nng ca n tathm du chm tr-c tn lnh k c g tt cng -c.

Tm li nu khi ra lnh m lnh khng thc hin ng cc b-c v kt qukhc hoc lnh khng thc hin -c th dng lnh nguyn thy.Cch ra lnh:

G t bn phm, v d .line

I.3.3Lnh c du ' tr-c tn lnhy l lnh xuyn sut (transparent). Lnh ny c th thc hin c lp hoc c

th -c thc hin ngay trong qu trnh ang thc hin mt lnh khc. khi thc hinlnh ny, qu trnh thc hin lnh ch th tm ng-ng, khi kt thc lnh xuyn sut, qutrnh thc hin lnh ch th li tip tc.Cch ra lnh:Thc hin c lp: tin hnh nh- bnh th-ng.

Thc hin trong qu trnh thc hin lnh khc:G t bn phm, v d 'zoomhoc 'zhoc c th dng trnh n hoc thanh cng

c nu c.Phm vi:

Ch c mt s lnh -c gn ch ng ny. Sau y l cc lnh xuyn sut:'ABOUT cho thng tin v AutoCAD.'APERTURE cho kch th-c vung truy bt im.'APPLOADgi ch-ng trnh ng dng.'ATTDISP cho attribute hin th hay khng.'BASE ly im c s khi xut hnh thnh khi hoc ra tp tin dng

chung vi phn mm khc'BLIPMODE cho hin du ta im hay khng.'CAL tr gip tnh ton.

'COLOR nh mu cho i t-ng sp v.'DDGRIPShin v nh kch th-c GRIPS.'DDPTYPEnh dng im (POINT).


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'DDRMODES lnh drawing aids.'DDSELECT lnh selection.'DDUNITS lnh Units c hin hp thoi.

'DELAY lnh l-u nhtrn mn hnh.'DIST lnh DIST.'DRAGMODE cho php hin hnh i t-ng khi ko.'ELEV nng cao trong khng gian 3 chiu theo trc Z.'FILL lnh FILL.'FILTER lnh FILTER.'GRAPHSCR t-ng -ng F2.'GRID lnh GRID.'HELP F1.'ID lnh ID.'ISOPLANE nhn hnh chiu trc o trong khng gian 3 chiu.

'LAYER lnh LAYER'LIMITS lnh LIMITS'LINETYPElnh LINETYPE.'LTSCALE lnh LTSCALE.'MATCHPROP lnh MATCHPROP.'ORTHO F8'OSNAP lnh OSNAP'PAN lnh PAN.'QTEXT cho php hin hnh ch nht thay cho dng ch.'REDRAW lnh REDRAW

'REGENAUTO cho ch t ng khi to bn v.'RESUME kt thc chy tp tin p bn.'SCRIPT chy tp tin p bn.'SETVAR cho gi tr bin h thng.'SNAP F9'SPELL kim tra chnh t (ting Anh).'STATUS hin thi trng thi bn v.'STYLE lnh STYLE'TEXTSCRF2'TIME hin trng thi thi gian thc hin bn v.'TREESTAT Displays information about the drawing's current spatial

'UNITS lnh UNITS khng hin hp thoi.'VIEW lnh VIEW.'ZOOM lnh ZOOM.

I.3.4Lnh ngoi - External commandsLnh ngoi l cc lnh -c to thm bng cc tp ch-ng trnh AutoLISP hoc

ARX (lp bng C hoc C++). Nu cc ch-ng trnh ny khng -c gi ra th lnhkhng c tc dng.

Mt s lnhngoi thng dng:-

PROPERTIES: c tnh ca i t-ng.

- MATCHPROP: thay i mt lot cc i t-ng theo i t-ng mu.- RECTANG: v hnh ch nht.


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- MTEXT: ghi ch thnh tng khi...........

Cn nhiu cc lnh khc na.

Qua y chng ta cng thy s l-ng lnh ngoi chim mt phn khng nh trong cc cng c ca AutoCAD.

Thit lp lin quan n lnh ngoi

Dng lnhTrnh n: Tools Options Open and SaveDng lnh:demandload

Gii thch

A- Dng trn trnh nHp thoi xut hin, chn mc Open and Save.

Trong nhm ObjectARX Applications, nhn nt , chn cc ph-ng n nh-hnh d-i.

Cc la chn c cng dng sau:

0- Disable Load on Demand:khng gi cc lnh ngoi. Cc lnh ngoi khng c tcdng. Nu khi ra lnh, thy xut hin dng nhc:

properties Unknown command "PROPERTIES". Press F1 for help.- Ti v d ny, chng ta ra lnh "PROPERTIES", dng nhc cho bit l khnghiu lnh , lnh khng -c thc hin.- Nh- vy lnh ny chnh l lnh ngoi.

1- Custom Object Detect:ch gi lnh ngoi no khi m bn v ra c i t-ng dng lnh ngoi . Khng thc hin -c lnh "APPLOAD"gi cc ch-ng trnhcha hm ngoivo.

2- Command Invoke: cho gi ch-ng trnh ngun cha lnh ngoi khi mt trong cc

lnh ngoi -c s dng.3- Object Detect and Command Invoke: kt hp c hai tr-ng hp 1v 2,cc lnhngoi lun lun sn sng s dng.

B- dng trn dng lnh

Dng nhc xut hin:Enter new value for DEMANDLOAD :g mt trong cc s sau: 0,1, 2,3. Cc gi

tr ny c ngha nh- s th t cc la chnti mc A.

I.4Khi bn v l b xa hoc khng m -cTrong phn ny chng ti gii thiu cch khi phc li tp bn v b xo hoc b

hng, hoc t mt khu bo v nh-ng qun mt, khng m -c bn v.


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I.4.1Dng tp tin *.sv$y l tp tin l-u tr t ng, cng l bn sao ca tp tin *.dwg.Tp tin ny

th-ng -c l-u tr ti th- mc:C:\DOCUMENT AND SETTINGS\cad-cam\LOCALSETTING\Temp\cad-cam: tn Acound.Tn bn v km theo k hiu: banve1_1_1_6500.sv$ ..Chng ta i tn tp ny thnh tp *.dwg l c th dng nh- mt bn v bnh

th-ng.Dng lnh trn trnh n Tools Options, hp thoi xut hin.

A-Tm ni l-u tr

1- Nhn chn mc Files.

2- Nhn du + ti dng Automatic Save File Location, -ng dn v tn th-mc hin ra.

B- Thit lp ch l-u tr t ng

Nhn chn mc Open and Save.1- Ti nhm File Safety Precautions cc tp d phng an ton, nhn ON cho

la chn Automatic save.2- Ti Minutes between savescho s pht (sau bao nhiu pht l-u tr mt ln).

C- i tn tp

Dng NC i tn tp. Ch yu l i phn m rng thnh *.dwg.

I.4.2Dng tp tin *. bak khi phcTp tin d phng (backup file). Tp tin ny -c sinh ra khi dng lnh Save,

cc i t-ng mi v thm -c l-u tr vobn *.dwg, v mt bn sao ca *.dwgkt


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qu ln l-u tr (Save) cui cng -c ghi vo bn *.bakcng tn. V d nu ta c tptin thietke1.dwgth cng s c mt bn thietke1.bak.

Cng dng: Thay th bn chnh khi cn thit. V d trong cc tr-ng hp bn

chnh b xa mt hoc li khng khi phc -c, ch cn dng lnh i tn (RENAME)ca h iu hnh thay *.bakthnh *.dwgl c th dng nh- mt bn v bnh th-ng.

1- Thit lp tp d phng

+ Ti hp thoi Options, chn mc Open and Save.+ Ti nhm File Safety Precautions cc tp d phng an ton, nhn ON cho la

chn Create backup copy with each save (to tp tin d phng sau mi ln l-utr)

2- i tn tpDng NC i tn tp. Ch yu l i phn m rng thnh *.dwg.

I.4.3Lnh RecoverChc nng

Dng khi phc d liu cho nhng bn v khi dng lnh OPEN khng m-c. Nguyn nhn c th mt s d liu b mt hoc khng ng b.

Dng lnhTrnh n: File Drawing Utilities RecoverDng lnh:recover

Gii thchHp thoi ging nh- lnh OPENxut hin:


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Chn tp tin cn khi phc, nhn Open.Qu trnh khi phc mt mt thi gian. Nu thnh cng, bn v s -c m.

Trong mt s tr-ng hp, mt s i t-ng c th b sai lch.

I.4.4t mt khu cho bn vDng lnh

Trnh n: File

Tools

Options

Open and SaveGii thch

Hp thoi xut hin, nhn chn mc Open and Save.

1- t mt khu

Nhn nt . Hp thoi tip theo xut hin.


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AutoCAD 2D nng cao 19

Password or phrase to openthis drawing:cho mt khu khi m bn v.Encrypt drawing properties: ON m ho d liu, nu m -c, d liu cng

khng c -c.

Nhn OK, kt thc hp thoi.Hp thoi tip theo khng nh mt khu.

Nhn OKkt thc cng on ny.Nhn OKkt thc lnh.

2- M bn v

Khi m bn v, hp thoi nhp mt khu hin ra.G mt khu vo nhp liu.Nhn OK.

Nu mt khu khng ng khng m -c bn v.

3- Hu mt khu

Khi m -c bn v, mun xo mt khu, dng li lnh t mt khu. Hpthoi hin ra.

Xo mt khu t.Nhn OK.Hp thoi tip theo khng nh xo hin ra (hhp thoi bn phi).Nhn OK. Mt khu b xo.

Nu b qun mt khu bn s khng m -c bn v, do khng nn tmt khu.

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AutoCAD 2D n©ng Cao