Sa se reprezinte piesa din figura 1 in triplaie ortogonala, utilizand straturile

Sa se reprezinte piesa din figura 1 in tripla proiectie ortogonala, utilizand straturile.

Fig. 1

Se stabilesc trei straturi corespunzatoare: linie groasa (contur), axe si cote. Se considera ca chenarul pentru un format A3 si indicatorul aferent sunt deja desenate.

Desenarea conturului.

Pentru a se lucra mai usor, stiind ca avem 3 proiectii, mutam UCS - ul in centrul zonei de desenare.

Command: UCS

Enter an option [New/Move/ . .] <World>: m

Specify new origin point or [Zdepth] <0,0,0>: 210,148.5

Pentru a reprezenta cele 3 proiectii astfel incat sa se utilizeze cat mai eficient spatiul de desenare, se imparte acest spatiu in 4 parti.

Command: Line

Specify first point: 0.00,-138.5

Specify next point or [Undo]: @0,277

Specify next point or [Undo]: enter

Command: enter

Specify first point: -190, 0.00

Specify next point or [Undo]: @390,0

Specify next point or [Undo]: enter

Din desenul piesei vedem ca cele 3 proiectii au urmatoarele cote de gabarit:

proiectia principala: L = 70; h = 30;

proiectia din stanga: L = 60; h = 30;

proiectia de sus: L = 70; h = 60.

Trasam cele 3 dreptunghiuri in care se vor incadra proiectiile respective, lasand fata de liniile desenate anterior cate 20 mm.

Command: Offset

Specify offset distance or [Through] <1.00>: 20

Select object to offset or <exit>: P

Specify point on side to offset: P1

Select object to offset or <exit>: P

Specify point on side to offset: P2

Select object to offset or <exit>: D

Specify point on side to offset: D1

Select object to offset or <exit>: D

Specify point on side to offset: D2

Select object to offset or <exit>: enter

Command: Offset

Specify offset distance or [Through] <20.00>: 70

Select object to offset or <exit>: D1

Specify point on side to offset: D3

Select object to offset or <exit>: enter

Command: enter

Specify offset distance or [Through] <70.00>: 30

Select object to offset or <exit>: P1

Specify point on side to offset: P3

Select object to offset or <exit>: enter

Command: enter

Specify offset distance or [Through] <30.00>: 60

Select object to offset or <exit>: P2

Specify point on side to offset: P4

Select object to offset or <exit>: D2

Specify point on side to offset: D4

Select object to offset or <exit>: enter

Command: Trim

Current settings: Projection=UCS, Edge=None

Select cutting edges

Select objects: D1, D2, D3, D4

Select objects: enter

Select object to trim or shift-select to extend or [Project/Edge/Undo]: P1

Select object to trim or shift-select to extend or [Project/Edge/Undo]: P2

Select object to trim or shift-select to extend or [Project/Edge/Undo]: P3

Select object to trim or shift-select to extend or [Project/Edge/Undo]: P4

Select object to trim or shift-select to extend or [Project/Edge/Undo]: P5

Select object to trim or shift-select to extend or [Project/Edge/Undo]: P6

Select object to trim or shift-select to extend or [Project/Edge/Undo]: P7

Select object to trim or shift-select to extend or [Project/Edge/Undo]: P8

Select object to trim or shift-select to extend or [Project/Edge/Undo]: P9

Select object to trim or shift-select to extend or [Project/Edge/Undo]: P10

Select object to trim or shift-select to extend or [Project/Edge/Undo]: P11

Select object to trim or shift-select to extend or [Project/Edge/Undo]: P12

Select object to trim or shift-select to extend or [Project/Edge/Undo]: P13

Select object to trim or shift-select to extend or [Project/Edge/Undo]: P14

Select object to trim or shift-select to extend or [Project/Edge/Undo]: enter

Command: Trim

Current settings: Projection=UCS, Edge=None

Select cutting edges

Select objects: D5, D6, D7, D8, D9, D10

Select objects: enter

Select object to trim or shift-select to extend or [Project/Edge/Undo]: D2

Select object to trim or shift-select to extend or [Project/Edge/Undo]: D4

Select object to trim or shift-select to extend or [Project/Edge/Undo]: T1

Select object to trim or shift-select to extend or [Project/Edge/Undo]: T2

Select object to trim or shift-select to extend or [Project/Edge/Undo]: T3

Select object to trim or shift-select to extend or [Project/Edge/Undo]: T4

Select object to trim or shift-select to extend or [Project/Edge/Undo]: T5

Select object to trim or shift-select to extend or [Project/Edge/Undo]: T6

Select object to trim or shift-select to extend or [Project/Edge/Undo]: T7

Select object to trim or shift-select to extend or [Project/Edge/Undo]: T8

Select object to trim or shift-select to extend or [Project/Edge/Undo]: enter

Astfel, am construit cele 3 dreptunghiuri aferente celor 3 proiectii ortogonale ale piesei.

In continuare stergem cele doua drepte, P si D, si vom trece la desenarea efectiva a proiectiilor, folosind comenzile Offset, Trim, Circle, Line si Extend.

Command: Erase

Select objects: P

Select objects: D

Select objects: enter

Command: Offset

Specify offset distance or [Through] <Through>: 10

Select object to offset or <exit>:    M1

Specify point on side to offset: M2

Select object to offset or <exit>:    M3

Specify point on side to offset: M2

Select object to offset or <exit>:    M4

Specify point on side to offset: M6

Select object to offset or <exit>:    M5

Specify point on side to offset: M6

Select object to offset or <exit>:    M7

Specify point on side to offset: M9

Select object to offset or <exit>:    M8

Specify point on side to offset: M9

Select object to offset or <exit>: enter

Command: enter

Specify offset distance or [Through] <10>: enter

Select object to offset or <exit>:    N1

Specify point on side to offset: N2

Select object to offset or <exit>: enter

Command: enter

Specify offset distance or [Through] <10>: 30

Select object to offset or <exit>:    N3

Specify point on side to offset: N4

Select object to offset or <exit>: enter

Command: enter

Specify offset distance or [Through] <30>: 15

Select object to offset or <exit>:    N5

Specify point on side to offset: N4

Select object to offset or <exit>: enter

Command: Trim

Current settings: Projection=UCS, Edge=None

Select cutting edges

Select objects: N5, N6, N7

Select objects: enter

Select object to trim or shift-select to extend or [Project/Edge/Undo]: N7

Select object to trim or shift-select to extend or [Project/Edge/Undo]: N8

Select object to trim or shift-select to extend or [Project/Edge/Undo]: N9

Select object to trim or shift-select to extend or [Project/Edge/Undo]: N5

Select object to trim or shift-select to extend or [Project/Edge/Undo]: N6

Select object to trim or shift-select to extend or [Project/Edge/Undo]: enter

Command: Offset

Specify offset distance or [Through] <15>: 10

Select object to offset or <exit>:    Q1

Specify point on side to offset: Q2

Select object to offset or <exit>: enter

Command: enter

Specify offset distance or [Through] <10>: 25

Select object to offset or <exit>:    Q1

Specify point on side to offset: Q2

Select object to offset or <exit>: enter

Command: enter

Specify offset distance or [Through] <25>: 35

Select object to offset or <exit>:    Q3

Specify point on side to offset: Q2

Select object to offset or <exit>: enter

Command: Line

Specify first point: Q4

Specify next point or [Undo]: Q5

Specify next point or [Undo]: enter

Command: Trim

Current settings: Projection=UCS, Edge=None

Select cutting edges

Select objects: Q6

Select objects: enter

Select object to trim or shift-select to extend or [Project/Edge/Undo]: Q7

Select object to trim or shift-select to extend or [Project/Edge/Undo]: enter

Command: enter

Current settings: Projection=UCS, Edge=None

Select cutting edges

Select objects: Q8

Select objects: enter

Select object to trim or shift-select to extend or [Project/Edge/Undo]: Q9

Select object to trim or shift-select to extend or [Project/Edge/Undo]: enter

Command: Erase

Select objects: Q8

Select objects: Q10

Select objects: enter

Command: Trim

Current settings: Projection=UCS, Edge=None

Select cutting edges

Select objects: Q6, Q12

Select objects: enter

Select object to trim or shift-select to extend or [Project/Edge/Undo]: Q11

Select object to trim or shift-select to extend or [Project/Edge/Undo]: Q13

Select object to trim or shift-select to extend or [Project/Edge/Undo]: enter

Command: Trim

Current settings: Projection=UCS, Edge=None

Select cutting edges

Select objects: S1, S2

Select objects: enter

Select object to trim or shift-select to extend or [Project/Edge/Undo]: S3

Select object to trim or shift-select to extend or [Project/Edge/Undo]: S4

Select object to trim or shift-select to extend or [Project/Edge/Undo]: enter

Command: Offset

Specify offset distance or [Through] <10>: 15

Select object to offset or <exit>:    S1

Specify point on side to offset: S5

Select object to offset or <exit>:    S2

Specify point on side to offset: S5

Select object to offset or <exit>: enter

Command: Trim

Current settings: Projection=UCS, Edge=None

Select cutting edges

Select objects: S6, S7

Select objects: enter

Select object to trim or shift-select to extend or [Project/Edge/Undo]: S8

Select object to trim or shift-select to extend or [Project/Edge/Undo]: enter

Din punctul S9 construim o linie perpendiculara pe dreapta S6.

Command: Line

Specify first point: S9

Specify next point or [Undo]: S10

Specify next point or [Undo]: enter

Command: Trim

Current settings: Projection=UCS, Edge=None

Select cutting edges

Select objects: S6, S7, S11

Select objects: enter

Select object to trim or shift-select to extend or [Project/Edge/Undo]: E1

Select object to trim or shift-select to extend or [Project/Edge/Undo]: E2

Select object to trim or shift-select to extend or [Project/Edge/Undo]: E3

Select object to trim or shift-select to extend or [Project/Edge/Undo]: enter

Astfel am obtinut si proiectia din stanga.

Command: Offset

Specify offset distance or [Through] <15>: 10

Select object to offset or <exit>:    E4

Specify point on side to offset: E6

Select object to offset or <exit>:    E5

Specify point on side to offset: E6

Select object to offset or <exit>: enter

Command: Trim

Current settings: Projection=UCS, Edge=None

Select cutting edges

Select objects: E7

Select objects: enter

Select object to trim or shift-select to extend or [Project/Edge/Undo]: E8

Select object to trim or shift-select to extend or [Project/Edge/Undo]: E9

Select object to trim or shift-select to extend or [Project/Edge/Undo]: E10

Select object to trim or shift-select to extend or [Project/Edge/Undo]: E11

Select object to trim or shift-select to extend or [Project/Edge/Undo]: enter

Command: Offset

Specify offset distance or [Through] <10>: 15

Select object to offset or <exit>:    F1

Specify point on side to offset: F3

Select object to offset or <exit>:    F2

Specify point on side to offset: F3

Select object to offset or <exit>: enter

Se construieste o linie din punctul S4 perpendiculara pe dreapta d1, respectiv din punctul S5 perpendiculara pe dreapta d2.

Command: Trim

Current settings: Projection=UCS, Edge=None

Select cutting edges

Select objects: F1, F2

Select objects: enter

Select object to trim or shift-select to extend or [Project/Edge/Undo]: E7

Select object to trim or shift-select to extend or [Project/Edge/Undo]: F6

Select object to trim or shift-select to extend or [Project/Edge/Undo]: F7

Select object to trim or shift-select to extend or [Project/Edge/Undo]: F8

Select object to trim or shift-select to extend or [Project/Edge/Undo]: enter

Command: Trim

Current settings: Projection=UCS, Edge=None

Select cutting edges

Select objects: F9, F10, F11, F12

Select objects: enter

Select object to trim or shift-select to extend or [Project/Edge/Undo]: F9

Select object to trim or shift-select to extend or [Project/Edge/Undo]: F10

Select object to trim or shift-select to extend or [Project/Edge/Undo]: F11

Select object to trim or shift-select to extend or [Project/Edge/Undo]: G1

Select object to trim or shift-select to extend or [Project/Edge/Undo]: G2

Select object to trim or shift-select to extend or [Project/Edge/Undo]: G3

Select object to trim or shift-select to extend or [Project/Edge/Undo]: G4

Select object to trim or shift-select to extend or [Project/Edge/Undo]: G5

Select object to trim or shift-select to extend or [Project/Edge/Undo]: enter

Se construieste o linie de axa din punctul S6 perpendiculara pe dreapta d3, si apoi vom copia dreapta d4 astfel incat mijlocul acesteia sa fie plasat in mijlocul linie nou construite (G6 = G8).

Command: Line

Specify first point: G6

Specify next point or [Undo]: perpendicular pe d3

Specify next point or [Undo]: enter

Command: Copy

Select objects: G7

Select objects: enter

Specify base point or displacement, or [Multiple]: G6

Specify second point of displacement or <use first point as displacement>: G8 (mijlocul dreptei construite anterior)

Command: change

Select objects: G9

Select objects:

Specify change point or [Properties]: p

Enter property to change [Color/Elev/LAyer/LType/ltScale/LWeight/ Thickness]: la

Enter new layer name <0>: axe

Enter property to change [Color/Elev/LAyer/LType/ltScale/LWeight/

Thickness]: enter

Command: circle

Specify center point for circle or [3P/2P/Ttr (tan tan radius)]: G8

Specify radius of circle or [Diameter]: 10

Obtinem, astfel, si cea de-a treia proiectie a piesei. Pentru a reprezenta conturul piesei cu linie groasa, trebuie sa schimbam stratul in care au fost desenate liniile corespunzatoare conturului. Pentru acest lucru inghetam stratul Axe si apoi folosim comanda change, cu selectarea obiectelor in modul Window.

Command: change

Select objects: w

Specify first corner: Specify opposite corner: 41 found

Select objects: enter

Specify change point or [Properties]: p

Enter property to change [Color/Elev/LAyer/LType/ltScale/LWeight/ Thickness]: la

Enter new layer name <0>: linie groasa

Enter property to change [Color/Elev/LAyer/LType/ltScale/LWeight/ Thickness]: enter