Tài liệu Autocad cho tự động hóa thiết kế nxb giáo dục ( www.sites.google.com/site/thuvientailieuvip )

TS. NGUV£N VAN HIEN AUTOCAD CHO TU• OONG HOA THIET KE • Sach dung cM sinh vien cac trllilng kY thu(lt (Tai bdn ldn flut hai) AUTODESK NHA XUAT BAN GlAo Dl,IC .. N gay nay khoa h9C kj thutjt phat triln rat nhanh chong, doi hoi m6i thanh vien trang xii h~i phdi thudng xuyin njp nht)t kiin thuc mCri, c6ng ngh? mCri. Tin h9C dang dUf1c ung dlfng r~ng riii va co hi~u qud cao trong cae linh v¥c cua dlii s6ng, trong khoa hqe kj thutjt va quan [y, kinh doanh. Trang vi~c tl! dqng hoa thiet_ ke'va dilu khie"n san xuat, -tin hqc cung dang dU{1c ling dlfng nhie'u. Phon mbn AutoCAD cua hang Autodesk dang dU{1c sri dlfng ngay cang r~ng r{ii, diJc bi~t trong thilt kl cac ban vi' kiln true, xdy d1fng, ve ca khi, di~n tu, hdng kh6ng, bdn dd, sa d6 v.v ... 6 Vi4t Nam nhie'u lfnh VIfC san xmit, khoa hqc ky thUtjt va doi sling dang doi hoi cac ky thutjt vien sri dl!ng ttIt phon me'm AutoCAD trong cong vi?c cua minh. CU6'n sach nay t{lO dieu ki~n cho b{ln dflc khai thac AutoCAD mt)t each de dang, co phucmg phap. No dUf/e duc kit III nhilng niim giang dflY cho sinh vien cac truang ky thutjt va cae ca quan thilt ke~ T iii li¢u L·O 3 phon: - Phon mt)t: tll chucmg 1 den chuang 8, trinh bay cach ltjp ban vi' phJng (2D); - {'han hai: tll chuang 9 den chucmg 12, trinh bay cach t{lO ban vi'm6 hlnh kh6ng gian (3D); each xudt m~t ban vi'ma hl'nh sang phdn mem khac va ra giay; ngoai ra huimg dan blJn dflC each tflo hinh anh dqng. - Phon ba: huimg dan thlfC hanh cac bai ttjp t6ng hqp dl b{ln dqe tlf hqc m~t each de dang. Cuan sach nay nhu m~t giao trinh rna Cae b{ln t6 thl dung dl II! h'lc va tham khao ling dl:'ng rat thutjn /¢ trong thiet kl cae /Jan ve. Tuy nhien do trinh dq co hlJn, sach edn co thie" 501. mong b{ln dqc dong gop y kUn. Thu gop y xin gw ve dia chi: Nhd ':coo, ban diao dlf.c· - 81 Tran HUng D{lO - HiJ Nri. HOfle theo di?n tho{li cua tac gid : 8693418. TACGIA 3 CHUONG J ? -' .... MO DAU VE AUTOCAD 1.1. GIOI THI¢U AUTOCAD Trang th~p ky 90, vi¢c khai thac di~n tmio ia van d~ hang driu d~ nang cao nang sufit, .hi~u qu{'\ cang vi¢c (1 c;ic dan V! kinh te, ky thu~t. M¢t trang nhung l"inh VL!C (juan tn;mg eua Tin h9c Ii! ky thu(11 do hQ nha, nhtmg thea y~u cilu phai la 50MB. Ngoai ra vi~c xit 15' thea ch€ dQ b" nha ao (Virtual ',Memory) cho n~n doi hoi dung h.tQ'Og dia tr6ng cang nhi~u cang t6t. • 6 tfia mem: dn co 6 dia mem m~t dQ cao. • Thilt b! vao: chUQt (mouse) ho~c b!lO di~n tit (Tablet). * H~ dieu hanh: h~ dieu hanh PC_DOS, MSJ)OS (Version 3.3 ho~c mai hem). • Thill bi xuat ban vi'ra: co thi dung may ve (Plotter) ho~ may iu (Printer). 1.2.3. Giao di~n AutoCAD a. KhOi diing AU/DeAD co 2 cach d6 khiri d~ng AutoCAD : 1- Khffi dQng bang file acad.exe: Gia sit AutoCAD duqc cai d~t vao 6 ctffig C: vai t~n thu m\lc la ACAD, b~n hay go tu ban phim 4i dau nhac cua DOS: C:\> CD ACAD ',J C:\ ACAD > acad,J 2- KhiJi dOng bang file b61~nh (Batch file) c6 duOi .BAT; VI d~ .el2.b.t; b~n chi vi~c go t~n "ac12" t~i defu nhAc h¢ th6ng: C:\> acll ,J Chu y: Khi b<).n dii t!).o Batch file dlchl,lY ACAD. thi ACAD dn khbi d{)ng bang ten Batch file d6. Dtra; day la m~t VI d~ ~o n~i dung file b.tch viri ten "ACI2.BAT' de khai d~ng ACADI2: SET ACAD=C:'ACA1JI.SUPPORT;C:\ACAD\ FONTS;C:'ACAIJ\ADS SET ACADCF(M;:\ACAD SET ACADDRV=C:\ACAJN)RV C:\ACAD\ACAD.EXE 1% 2% SET ACA[):= SET ACADCFG= SET ACADDRV:::: DOng thu 1,2, 3 d~t cac bien mOi troang cho AutoCAD. DOng thtl 5,6,7 de x6. cae bien.mOi truUng da cM d~t sau khi thoat khbi AutoCAD. b. Man hinh Au/oCAD' D6i vOl ACADI2 man hloh la man blnh graphics, xem hlob I-I. Man hlnh do h9' AutoCAD bao g6m cac pMn s.u day: 1· Viing dol h<)a (Graphics area) 2 - Dong I~nh (Command line): 11\ no'i ~ao l¢nh' va hi¢n cae nhAc nha. No nam dum day man hlnh. . a 3 - Dong tr~ng th.U (Status line): lJ tr!n diJ;ih man hlnh. N6 thOng bao tn:mg thai hi~n thai cua ban ve. Vi dl,l t~n lap hi~n thail cac mode xac dinh t93 dQ con tro (Cross hair). 4 ~ UCS icon: H\ bieu tuqng v6cta h~ th6ng t(;la ~. N6 n~m g6c duai - trni cua man hlnh. a S -,Screen Menu: nam ben ph3i m~n hlnh, dung-d~ vao l~nh bang con chuQt (Mouse) h~~c bang bang di~n tu (Tablet). Mu6n g9i l¢nh. ~ dua con tro chu¢t t6'i kich sang I~nh cin ch9n va bam phim tnii chu¢t (pick button, hlnh 1-2), ho~c in Enter. 7 utllitles loaded Hlnh I-I: MrmhlnhACADl2. CUsor menu button Pick bullon Enter button 6 - Pull-Down Menu UI thl!e dcm trilj xu6ng va cae hl)p tho<;li, Khi b""n II dua con tro chul)t len dong tr'.lng thai (status line), man I' hlnh hj~n ra dong Menu Bar, bt),Jl chc,m m(lt menu se hi~n ra bllllg menu Inii xu6ng (hlnh 1,-3), Tll menu lraJ xu6ng b""n chon J¢nh bfmg each di con tro chu,,' kfch sang ten l¢nh va btlm phfm trili chu(lt (Pick button) ho.)e 5n Enter. - Th~/c don con lro (cursor menu) L D6i vai chul)t 3 mit bam, b5m nut gina (ho~c rin Ilnh 1-2. V" Shifl+nut phai) se hi¢n ra h"p cursor menu. c. each )'lio 1~llh di A lIloeAD IJ",lc hi~n Khi b duai day mall hlnh hi~n ra lai nhAc "Command:" tlre la AutoCAD dang san sang ti€p nh~n It;nh ella b<;lll dua ra. B<,ln c6 the V30 l~nh bfing 2 each sau day: I - Vao l~nh tu ban phim: bf,m go ten l¢nh tll ban phfm sau d6 an Enter ho~c Space-bar de AutoCAD thlfc hi~n. 2 - Vilo I~nh tit Menu: bq.n dung chuQt ho~c lh.blet chi cho AutoCAD bi€t bf,m mu6n ve b duu va vc di gl. oci Hl.In dieu d6 bq.n hay chuyen con tro laj Screen Menu fJ ben phai m~m hlnh, di con Iro kich sang I~nh va bt\"m phfm Imi chu(ll (Pick). 8q.n cung c6 the dua con tro tai dong menu-bar b tren dinh man hlnh, kich sang m"t menu b'.ln mu6n, nhay phfm Pick ehu", sc hi¢n ra Pull-Down Menu de bq.1l chqn J¢nh. Neu dung phfm ehu", thu 3 (gifra) ella ehu(lt ho~c A'n Shifl+phfm phai ChUQI, AutoCAD se dua ra Ihlfc dcm con Iro (Cursor menu) de b'.ln gQi I~Jlh OSNAP (xem chucmg 2, li€12-12). 8 Donut Ellipse Polygon Rectangle Insert ... 3D Surfaces Hatch ... Text Dimensions Hlnh 1·3: Pull-Down Menu ellll ACADI2. B<,ln c6 th~ l~p l~i mQt I~nh vtra Si'l d~mg b~ng each an phlm chuQt ben phai ho~c Enter, Space-bar. ho~c d. Sil' d(lflg cac ky t(t lUlu khid'n, cac phim chrlc nang, go tilt l¢nh Ngoai cae phfm Enter, Space/wr hay phfm chuQt, cae eh{rc nang dieu khi6n con g6m 2 phfm: Ctrl+ mQt phim khac. Ctrl + C : M huy bo 1 l~nh; Ctrl + G = F7 : M b~t/dl ch€ di) hi~n l..oi (GRID); Ctrl + 0 ::: F8 : b~t/tat eh€ d¢ ve th~ng dung/nam ngang (Orlho mode); Ctrl + B = F9 : M b,H/'," ch€ d6 lao l..oi (SNAP); Ctrl + 0 ::: Fl : chuy~n Itl man hlnh Text sang mim hlnh Graphics va nguqe If,li; F6 : b~t/tat vi~c hi¢n tQa do t~i di6m con Iro dt'mg. * Cac l¢nh co the' go tat A::: l¢nh are C :::: Circle E :::: Erase L:::: Line LA:::: Layer M::: Move P:::: Pan PL:::: PLine R::: Redraw Z:::: Zoom e. Cach vdo dii: lieu a SU dl;lng h¢ don vj do chieu dai va do g6e deu cho dl..mg Ih~p phan. Trj s6 dua tir ban phfm vao Ht s6 nguyen hay s6 c6 mang dtlu cham th~p ph1)n. G6c co g6c 0 huang sang phili va ehieu tang ella g6e theo chieu nguqc veti chicu quay kim dOng hO. C6 th~ vao dO' li¢u til ball phim, vao b~ng phfm ehuQI, tablet va eae phlm djeh chuytn sqi t6c (Cross hair). 9 • Ctfc c6ch~""h~ 41lm + GO ~Ao'-tQa dQ tuy~t d6i ella diem + GO vllQ tQa dQ hrrmg d6i ella diem + DUng -phim chul)t, tablet chi diem + DUng phim di chuyen tr~n b~m phim + Diing Object snap (bilt d6i tuqng) d~ neo con tro vai d6i tuqng dii ve. Duai day trlnh bay cae each cho diem hang t<;>a d¢ thuang dung trong thi¢'t k€: • T(}a dl) tuy~t d61 T<;>a d¢ tuy~t d6i til tr~ 56 thl!c ella cae t<;>a d¢ x,Y,z so ~Oi gae s6 z, hie c1y AutoCAD them van gia tri z bang tQa d¢ hi¢n thai Vi d~ : 3, 12.5 (x=3, y=12,5) • T(}a dt) tuong d(j'i o. B~n co the bb qua tq De TQa d¢ wang d6i Hl tQa d¢ so vOi diem dii chi d!nh truuc do. cho tQa d¢ tlIang d6i b~n phai them dau @ (At-sign) phfa tnlOc tQa d¢: @X2,Y-2 so vai diem trl16c do (Xl,Yl) lam goc. Vi d1,l: 010 P2: @S.S, -to, n~u diem chi d~nh tnIac dola Pl(lOO, 50), lhi tQa dQ luang d6i do llIang dUo'I1g vai tQa d¢ tuy~t d6i la (105.5, 40). • TiJa dt) clfC tuang dOl TQa d¢ C,!C dlIqc cho biing ban kinh p va g6c quay : (Examples) 1.55E+0 1 15.50 1'_3.50" l' 3.1/2" 15.1/2 2 D6i voi tieu chuan Vi¢t Naill (TCVN) ch9n 2 (h¢ met). V6'i eac h!a chQn 1,2,3 thl xuat hi¢n dong nh~c sau day de b"tn ch9n ti€p s6 so \e sau da"u phay (dau cham trong ti€ng Anh): Number of digits to right of decimal point (0 to 8)< ... >: (cho s6 s61e sau dau phfiy thap phan, til I den 8). Neu chQn chuc nang 4, 5 lh. nhl'ic nho tiep Sf Iii: Denominalor of smallest fraction to display(l, 2, 4, 8, 12, 16,32 or 64)< ... >: (b'.ln chQn mall s6 Clla ph.1n ph~n so nha nhA't). Sau do I~nh UNITS thOng bao tiep de' b,!n chQn dan V! do goc nhu sau: 13 Report formal: I. Decimal degrees 2. Degree/Minutes/Seconds (Examples) 45.0000 45 d O' 0" 3. Grad 50.0000 g 4. Radiant 0.7854 r 5. Surveyor's units (dan vi ban dO) N 45d 0' 0" E Enter choice, I to 5< ... >: 2 Theo TCVN b<.ln nen chQn 2 (d,,/phlit/git\y). Sau do ACAD nhflc nhe, tiep de b",n chQn s6 chO hien lhi phfin Ie clla gOc: Number of fractional places for display of angle(O to 8)< ... >: Bfty giu ACAO nhk nhi1 ehQn huang chuan ella g6c: Direction for angle 0: (huang ella g6c 0) East 3 o'clock = 0 North 12 o'clock = 90 West 9 o'clock = 180 South 6 o'clock = 270 Enter direction for angle 0< ... >: (b',111 chQn goc 0° bang go 0, hay chQn 90, 180,270). Cu6i cimg de chon chitu duang clla gOc, ACAD nhac nhc,: Do you want angles measured clock wise?< ... >: Il.::m tnl lai "Y" la d6ng y gOc do thea ehieu quay kim d6ng h6, ho~e uN" thea chitu nguqc I""i (TCVN cho goc ducmg quay nguqc chitu kim d6ng h6). Chu thieh: 1- ACADt2 con dlla ra Mnh DDUNITS de hi¢n hQp IhO<,li eho b':ln h!a'chQnlhco cae nQi dung 1tt(1I1g Ilf nhu Iren. xem hlnh 1-10. 2- li~l 1.2.3 tr~n dAy dii Irinh bay 2 cach SQi J¢nh Clla AutoCAD: m¢1 la go len I¢nh lit ban phim; hai Iii van Itnh tit Screen Menu ho~c Menu Bar. 0 drty muOn gQi lenh UNITS tit Menu la lam nhu sau: bl!-n dung chuQI kfch sang SE111NG tren Menu dQC(Scn:cn Menu), ho~c tTen Menu ngang (Menu &tr), sau d6 di con Iro t6i Mnh UNITS va nhay phfm pick chu(ll v1\.o d6. Ta bieu thi qu6 Ir"inh gqi I~nh UNITS tit Menu nhu sau: Screen Menu> SE1TJNG > Units Menu &tr> SE1TJNG > Units Control Units Control Units Angles o .scientific ® ®[~etlm~:!J o ,Engineering o Architectural o fractional o Deg/Min/Sec o .Grads o Badians o Suryeyor erecision: Precision: IiI 10.0000 OK II Cancel 0 1 Decimal Degrees IiI II12he ctlon ... llllelp ... I L$NII LIMITS IIlnh 1-10: Htlp thoai I~nh DDUNITS Clla ACADI2. L¢nh nay dtmg de d~1 giai h<,ln vung ve (khO bim vel. Command: limits ON/OFF/< ... >: - Dap rn~c d!nh: cho diem gOc tn,i duai - ON/OFF: neu Ira lui ON b~n chi ve duoc iJ ben lrong mU!n giai h<.tn LIMITS; con tni lui OFF b<;11l co lh~ ve c;l trong va ngoai LIMITS da d(ll. 14 Sa1,l khi cho diem g6c trlii duai, ACAD nhac b<;m cho di~m g6c phai tren cua mien chu gi6i h'.l-n ve: Upper right comer<. ..>: (cho diem g6c phai tren) nh~t Ghi ehu: Sau khi d~t gim h""n vi! bdi I¢nh LIMITS , b~ c6 the dU'a tOIm bl) gioi h{ln ve d6 ra man hlnlJ b~ng I¢nh ZOOM vl'1i li,a ch9n ALL; m~t idt gi6i h'.l-n ve ra man hlnh, dung I¢nh ZOOM h!a 'chqn ALL. 4- Ve khung ban ve, khung ten, dung l~nh LINE ho~c PLINE (xem chuong 2, tiet 2-2 va tiet 2-3). 5- D~t cac thOng s6 khac: * D~t lucri ve, dung l¢nh SNAP va GRID (chuong 2, tiet 2-12) . • Tao lap cho ban ve, dung l¢nh LAYER (xem chuong 6, tiet 6-2). * T'.lo kieu ghi kich thuac vai cac bien kich thuGC b'.ln chqn, dung l¢nh Dim VAR. * Tl!lo cae kieu viet chil, dung l¢nh STYLE (xem chuoog 5, tiet ·56- ott gill han vo khiJi thuy (PD), dung l¢nh SAVE AS. a Xac f ). Ghi ehu: cae b!,ln mm h9C AutoCAD ehi dn bim vi! khOi thuy l~p theo cac buUc 1, 2, 3, 4, 6. 15 CHUONG 2 ., CAC LI;NH VE CO BAN , 2.1. POINT: YO di.!m * each gQi I~nh POINT til Menu: .-----------------, Screen Menu> DRAW> Point Menu Bar > ORAW > Point * Go l¢nh tu b~m phfm: Command: point Point ACAD12 dtmg bien POMODE xac djnh d~ng diem khac nhau va bien PDSlZE xac djnh kfch thucrc di Bi)1l g6 U neu muon bo do~n th&ng vua ve; g5 C de dong kin ducrng gap khuc. Vi d~: hloh 2-2. Command: line From point: 100,120 To point: @ 40<60 To point: @40<-60 To point: c To point: .J 2.3. PUNE (POLYLINE) L~nh oay de ve da tuyen (Polyline) g6m cae do~n thang va cae eung tron noi tiep nhau_ Chung eo the cho d¢ r¢ng net, lo~i ducrng net khae nhau(ducrng lien, duemg dU!, duemg cham gach ... ). _ + _ X 0 0 -$- l2l: (') D D $- J2,1 [1J D D -$- f.2l ['J LINE til menu: Screen Menu> ORA W > Line Menu Bar > DRAW > Line 16 Point Style I" Point ,S.ize: 15_0000 ® Set Size Belative to Screen o Set Size in Absolute Units I Cancel I OK Hlnh 2-1: H9P Ihm_li ella l~l1h 1 tldp ... I POINT trong ACADI2. P2 -60' P1L-~ ________ (100,120) Hinh 2-2 ~ P3 • each gqi l~nh PLINE til Menu; r-----------------~ Screen Menu> DRAW> Pline Menu Bar > DRAW > Pline • Go l~nh til blm phim; • Command: From point: pline <~ r¢ng hic;n thai la 0> Current line width is 0.0000 ArdClose/HalfwidthILengtblUndolWidtbl: • Dong nMc dO U'ng viti vi'dofln thdng, cac lila chQn de' ve nhu sau: + aWn A: chuyen ti':r ve dUCmg thing sang ve Cl\og tron n6i tiep. + aWn C: dOng kin da tuyl!n l~i. + ChQn H: de nh~p vaG m'ra be r"ng net ve. + ChQIl L: de ve do~n thing co chien da:i du<;IC dua VaG va co cung d¢ nghieng vCri dof,lll th~ng tnrac d6.Nt'!u tnJac d6 13, eung tron thi dof,lll th~ng mm tie? xuc v6i cung tron do. + Ch9n U: x6a do~n vila ve tnrac do. + Chqn W: chi dinh be r{mg net ve cho do~n til!p theo. + M~c d!nh: ~n cho tl?a dl) diem thi do la mut thu 2 eua do~n. • Ntu vi' c:ung trim thi dong nhac.: senhu sau : Angle/CEnter/CLoselDirectionIHalfwidtb/LinelRadiusiSecond . pointiUndolWidtbl: + aWn A: cho goc Om eua eung tron. + ChQn CE: cho tAm cung trOn. + ChQn D: chi ra hU6'ng ve cung tron Iii hUOng ti€p tuy€n t~i diem d Arc/Close/LengthlUndo/Width/: @70,0 Arc/Close/Halfwidth/Length/Undo/Width/: a Angle/CEnter/CLose/Direction/Halfwidth/Line/Radius,lSecondpoint/ Undo/Width/: @6O<·90 Angle/CEnter/CLose/Direction/Halfwidth/LinelRadius/Second point/Undo/Width/: 1 Arc/Close!Halfwidth/LengthIUndo/WidtbJ: @·70,0 Arc/Close/Length/Undo/Width/:. @20<90 Arc/Close/Halfwidth!LengthlUndo/Width/: a Angle/CEnter/CLose/Direction/Halfwidth/Line/Radius/Second r point/Undo/Width/: Radius: 10 Aogle/: @0,20 Aogle/CEnter/CLose/Direction/Halfwidth/Line/Radius/Second QOintJ\JndoJWid'h/: I Arc/Close/Halfwidth/Length/Undo/Width/.. c 17 ('ro.100) pi P8 70 p P" 70 PS ffinh2-3 mnh 2·4 2.4. CIRCLE: VO duilng tron '* each gQi l¢nh CIRCLE til Menu: ,-----------------~ Screen Menu> DRAW> Circle Menu Bar > DRAW > Circle • Go l~nh til ban prom: Command: circle L¢nh circle d~ ve duemg trOll thee cae each x.ac dinh khac nbau: • Cho 14m va ban klnh (hinh 2-4): Command: circle 3P/2P{ITR/: 75,50 Diameter/: 30 • CII. 14m va tI/lllng klnh: lUang !\f nbu Wn. • Clio 3 tJilm (3P) Command: circle 3P/2PfTIR/: 3P First i><>int: Second point: Third point • Cho 2 tIilu mul ella ~I tt/lilng klnll (2P) Command: circle 3P/2P{ITR/: 2P First point on Diameter: Second point on Diameter: • Ve tI/lllng IrOn litp xue v';; 2 tI/lllng eho /rUUc (ITR) Vi du: hlnh 2-5 Command: circle 3P/2P{ITR/: TIR (ho~c T ) Enter tangent spec: Enter second tangent spec: Radius: 34 Command: .J 3P/2P{ITR/: TIR Enter tangent spec: Entersecondtangentspec: Radius: <-chi va~ duemg thu 3, P3> 75 ,.I",-,,}"."-",,-'". 2.5. ARC: Vi! cung tron * Oich gQi l¢nh ARC til'Menu: Screen Menu> DRAW> Arc Menu Bar > DRAW > Arc I • * Go I¢nh til' ban phim: arc Command: Vi! cuog tr«)n theo cac each nhtl sau: .'Cung tr~n qua 3 diim (hlnh 2-6) Hlnh 2·5 Command: arc Center/: PO Center/End/: End point: - Diim d(iu (Start), tam(Center), diim cud! (End): Pi S,C,E Command: arc Center/: Center/End/: C Center: Angle/Length of chord/: - Diim dau, tlim, g6c om (Include Angle): S, C, A Command: arc Center/: Center/End/: C Center: Angle/Length of chord/: A Include Angle: - EJiim dau, tam, chie'u dai cung (Length oj chord): S, C, L Command: arc Center/: «ho diem PI> Center/End/: C Center: ' «ho tam> Angle/Length of chord/: L Length of chord: - Diim ddu, diim cudi, ban ktnh: S, E, R Command: arc Center/: Center/End/: E End poind: Angle/Direction/Radius/: R - EJiim dciu, diim cutfi, goc dm: S, E, A Command: arc Center/: PO 19 • pPint>: Center/ Center/Encl/: E End poind: Angle/Direction/Radius/: A Include Angle: • Dilm tlDu, dilm COOl, hU't1ng phdt min: S, E, D Command: arc Center/: Center/End/: E End poind: AngleIDirection/Radius/: D Direction from start point - Ve cung tron n6i tiep v6i mQt duimg dti cho Giii su truac do ta d3: ve 1 duemg thAng hay 1 cung tron, trong l¢nh ARC nell ta ENTER a dong nhlic da.n tien thl cung tron ve fa se n6i tiep voi duemg dli co. Vi dl!-: hloh 2-7 (11(1.10) Command: line 45,50 From point: 120,50 To point: To point: .J arc Command: Center/: .J End point: @liO<45 - 2.6, TRACE L¢nh ntly Hinh 2-7 de ve dO-D-R-A-W->-T-ra-c-e--' ... G5 l¢nh tu ban phim: Command: trace' VI d~: hlnh 2-8. Command: trace Trace width< ... >: 2.4 II each gQi l¢nh POLYGON til Menu: ~-------------. Screen Menu>DRAW>Polygon Menu Bar > DRAW >Polygon 20 60 thl net ve duqc to • G5 l~nh tir ban phim: Command: polygon Number of side< ... >: Edge/: L¢nh Polygon de ve da giac d~u bang cac cach sau: + Neu cho tam P, ACAD nhac nha tiep: Incribed in circle/Circums cribed abaut circle< ... >: Radius of circle: B~n cho diem la dinh hay diem giita e<,mh da giac 1a toy truemg hqp ve n¢i ti~p hay ngo~i tiep; neu b<.m cho 1 s6 thi d6 13. d¢ dai c<,mh day polygon nam ngang. + Ntu chl!n E de ve da giac deu bOi 1 c~nh, vai dong nhac nhu sau: Edge/: E First Endpoint of edge: Second Endpoint of edge: tra. 2.S. DONUT (DOUGHNUT) L¢nh nay ve hinh vanh khuyen co t6 mau tmng neu bi~n FILEMODE con d~t gia tri bien do Iil OFF(O) thi kh6ng t6 mau. * each gQi l¢nh OONUT tir Menu: a d~t la ON(1); ,-----------------~ Screen Menu>DRAW>Donut Menu Bar > DRAW > Donut • G5 l¢nh tit bim phim: Command: donut Vi d~: hinh 2·9. Command: donut Inside diameter< ... >: 25 Outside diameter< ... >: 35 Center of doughnut: 130,110 Center of doughnut: .J 2.9. ELLIPSE: mnh 2·9 Ve .lip • each g9i I~nh ELUPSE til Menu: ~--~---------, Screen Menu > DRAW> Ellipse . Menu Bar > DRAW > Ellipse • GO I~nh til bhn phim: Comm/Center: Axis endpoint 2: /Rotation: ellipse _I (hlnh 2-10). 21