Zvatinotarisira pane zvakakwana PCB inowanzo kuve yakatsetseka rectangular chimiro. Nepo akawanda magadzirirwo ari akaenzana emakona, mazhinji anoda mabhodhi ane zvimiro zvisina kujairika, izvo zvisiri nyore nguva dzose kugadzira. This paper introduces how to design PCB with irregular shape.

Nhasi, PCBS iri kuita diki uye nekuwedzera uye kuwanda mashandiro akawedzerwa kumabhodhi, ayo, pamwe chete nekuwedzera kwekumhanya kwewachi, zvinoita kuti zvigadzirwa zvive zvakaoma. Saka, ngatitarisei maitiro ekubata nedunhu redunhu rine yakaoma chimiro.

As figure 1 shows, simple PCI board shapes can be easily created in most EDA Layout tools.

Mufananidzo 1: Chitarisiko cheyakajairika PCI wedunhu bhodhi.

Nekudaro, kana zvimiro zvebhodhi zvichida kuchinjirwa kune dzakavharika dzakaomarara nemipimo yakakwira, hazvisi nyore kune vagadziri vePCB nekuti mashandiro ari mune aya maturusi haana kufanana neaya ari muma mechanical CAD masisitimu. Iyo yakaoma wedunhu bhodhi inoratidzwa muMufananidzo 2 yakagadzirirwa kunyanya kuputika-proof imba uye inoenderana nemazhinji mamakina kukwana. Trying to reconstruct this information in EDA tools can take a long time and be unproductive. Zvichida kuti mainjiniya enjiniya akatogadzira pekugara, redunhu bhodhi chimiro, inokwira gomba nzvimbo, uye miganhu yekukwirira inodiwa nePCB dhizaini.

Mufananidzo 2: Mumuenzaniso uyu, iyo pcb inofanira kugadzirwa zvinoenderana neakananga magetsi kuti igone kuiswa mumidziyo yekuputika.

Mufananidzo 2: Mumuenzaniso uyu, iyo pcb inofanira kugadzirwa zvinoenderana neakananga magetsi kuti igone kuiswa mumidziyo yekuputika.

Nekuda kwema radians uye radii mubhodhi redunhu, kuvakazve kunogona kutora nguva yakareba kupfuura zvaitarisirwa, kunyangwe kana bhodhi redunhu chimiro chisina kuomarara (sezvakaratidzwa muMufananidzo 3).

Mufananidzo 3: Kugadzira akawanda maredhiyo uye akasiyana marediy curves anogona kutora nguva yakareba.

Mufananidzo 3: Kugadzira akawanda maredhiyo uye akasiyana marediy curves anogona kutora nguva yakareba.

Iyi ingori mienzaniso mishoma yeakaomesesa wedunhu bhodhi maumbirwo. However, from today’s consumer electronics, you’d be surprised how many projects try to cram all the functionality into a small package that isn’t always rectangular. Smartphones and tablets are the first things that come to mind, but there are plenty of examples.

Kana iwe ukadzorera mota yekurendesa, unogona kuona murindiri achishandisa ruoko rwakabata scanner kuverenga ruzivo rwemota uye nekutaurirana zvisina waya nehofisi. The device is also connected to a thermal printer for instant receipt printing. Anenge zvese izvi zvishandiso anoshandisa akaomarara / anochinjika matunhu ematunhu (Mufananidzo 4), uko akajairika pcb mabhodhi akabatana neanochinjika akadhindwa maseketi kuti akwanise kupetwa kuita madiki Spaces.

Mufananidzo 4: Rigid / flexible circuit board inobvumira kushandiswa kwakanyanya kwenzvimbo iripo.

Mufananidzo 4: Rigid / flexible circuit board inobvumira kushandiswa kwakanyanya kwenzvimbo iripo.

Mubvunzo, saka, ndewokuti “Unoisa sei yakatsanangurwa meinjiniya yakatarwa mune yePCB dhizaini dhizaini?” Kushandisazve iyi data mune mechina dhizaini kunobvisa kudzokorora kwesimba uye, zvakanyanya kukosha, kukanganisa kwevanhu.

Tinogona kugadzirisa dambudziko iri nekuunza ruzivo rwese muPCB Layout software tichishandisa DXF, IDF kana ProSTEP fomati. Izvi zvinoponesa nguva yakawanda uye zvinobvisa mukana wekukanganisa kwevanhu. Tevere, isu ticha tarisa pane imwe yeaya mafomati.

Graphics interchange format – DXF

DXF ndeimwe yekare uye inonyanya kushandiswa mafomati ekutsinhana dhata pakati pemakanika nePCB dhizaini domains. AutoCAD yakaigadzira mukutanga kwema1980. Iyi fomati inonyanya kushandiswa kune maviri mativi dhizaini kuchinjana. Mazhinji maPCB ekushandisa vatengesi vanotsigira iyi fomati, uye inoita kuti kuve nyore kuchinjana kwedata. DXF kupinza / kunze kwenyika zvinoda kumwe kuwedzera kushanda kudzora matemba, akasiyana masuniti uye zvikamu izvo zvichashandiswa mukuchinjana maitiro. Mufananidzo 5 muenzaniso wekunze wakanyanya kuomarara wedunhu maumbirwo muDXF fomati uchishandisa Mentor Graphics ‘PADS maturusi:

Figure 5: PCB design tools (such as PADS described here) need to be able to control the various parameters required using DXF format.

Figure 5: PCB design tools (such as PADS described here) need to be able to control the various parameters required using DXF format.

Makore mashoma apfuura, 3d mashandiro akatanga kuoneka muzvishandiso zvePCB, uye pakanga paine kudikanwa kwemafomati aigona kuendesa data re3D pakati pemachina nemaPCB maturusi. Kubva pane izvi, Mentor Graphics yakagadzira iyo IDF fomati, iyo yanga ichinyanya kushandiswa kuendesa redunhu bhodhi uye ruzivo ruzivo pakati pePCBS nemuchina maturusi.

Ipo fomati yeDXF iine hukuru hwebhodhi uye ukobvu, fomati yeIDF inoshandisa iyo X uye Y nzvimbo dzechinhu, chikamu chechikamu, uye z-axis kukwirira kwechinhu. This format greatly improves the ability to visualize a PCB in a 3D view. Additional information about forbidden areas, such as height restrictions on the top and bottom of the board, may also be included in the IDF file.

Iyo sisitimu inoda kukwanisa kudzora izvo zvichave zviri muIDF faira nenzira yakafanana neiyo DXF paramende Zvirongwa, sezvakaratidzwa muMufananidzo 6. Kana zvimwe zvinhu zvisina ruzivo rwehurefu, kunze kwenyika kweIDF kunogona kuwedzera ruzivo rusipo panguva yekugadzira.

Figure 6: Parameters can be set in the PCB design tool (PADS in this example).

Figure 6: Parameters can be set in the PCB design tool (PADS in this example).

Imwe mukana weiyo interface yeIDF ndeyekuti chero bato rinogona kuendesa chinhu kunzvimbo nyowani kana kushandura chimiro chebhodhi, uye vozogadzira rakasiyana faira reIDF. Iko kusagadzikana kweiyi nzira ndeyekuti iwe unofanirwa kuendesa zvakare iyo yose faira inomiririra shanduko kubhodhi uye zvikamu, uye mune zvimwe zviitiko zvinogona kutora nguva yakareba nekuda kwehukuru hwefaira. In addition, it can be difficult to determine from the new IDF file what changes have been made, especially on larger boards. Users of IDF can eventually create custom scripts to determine these changes.

Nhanho uye ProSTEP

Kuti ugone kufambisa matatu-mativi data, vagadziri vari kutsvaga nzira yakavandudzwa, STEP fomati yakatanga kuve. Iyo STEP fomati inogona kuendesa maseketi ebhodhi masystem uye marongero echinhu, asi zvakanyanya kukosha, zvikamu hazvisisina chimiro chakareruka chine kukosha kwehurefu chete. STEP yezvinhu modhi inotsanangurwa uye yakaoma kumiririrwa kwezvinhu muzvikamu zvitatu – zvemhando. Ose mabhodhi wedunhu uye ruzivo rwechinhu runogona kuendeswa pakati pePCB nemuchina. Nekudaro, hapasati paine mashandiro ekutevera shanduko.

Kuvandudza STEP faira kuchinjana, isu takaunza iyo ProSTEP fomati. This format moves the same data as IDF and STEP and has a big improvement – it can track changes and also provide the ability to work within the discipline’s original systems and review any changes once a baseline has been established. In addition to viewing changes, PCB and mechanical engineers can approve all or individual component changes in layout, board shape modifications. Ivo vanogona zvakare kuratidza akasiyana ebhodhi saizi kana zvinoriumba nzvimbo. Uku kutaurirana kuri nani kunogadzira ECO (Injiniya Shanduko Order) pakati peECAD nechimakanika timu isina kumbovapo kare (Mufananidzo 7).

Mufananidzo 7: Funga shanduko, tarisa shanduko pane chishandiso chekutanga, bvumira shanduko, kana zano rakasiyana.

Mufananidzo 7: Funga shanduko, tarisa shanduko pane chishandiso chekutanga, bvumira shanduko, kana zano rakasiyana.

Nhasi, mazhinji ECAD uye echimakanika maCAD masisitimu anotsigira kushandiswa kweProSTEP fomati yekuvandudza kutaurirana, kuchengetedza nguva yakawanda uye kudzikisira zvikanganiso zvinodhura zvinogona kukonzeresa kubva kune yakaoma electromechanical dhizaini. Zvakare, mainjiniya anogona kuchengetedza nguva nekugadzira yakaoma dunhu bhodhi chimiro pamwe nezvimwe zvipingamupinyi uyezve kuendesa iro ruzivo nemagetsi kudzivirira mumwe munhu kuturikira zvisirizvo zviyero zvebhodhi redunhu.

kugumisa

Kana usati watoshandisa chero eaya maDXF, IDF, STEP, kana ProSTEP mafomati edhata kuchinjana ruzivo, unofanirwa kutarisa mashandisiro avo. Funga kushandisa iyi edi kumira kutambisa nguva kugadzirisa zvekare akaomarara mabhodhi maumbirwo.