没有雕刻机如何打椭圆孔

一直想做一个走字灯箱，可不知道如何打椭圆孔。大家有没有好的办法。

通常大家是怎么弄的，请大家指点指点。{:1_145:}

打圆的，背面多打胶就行，正面看不出来的，

[whitepad]***400;200;400,200;;** m45,36 l45,39,46,40,47,40,49,42,49,45,50,45 e|********* m44,50 l47,50,47,49,51,49,51,48,54,48 e|********* m43,56 l57,56 e|********* m31,61 l38,61,42,62,74,62 e|********* m42,67 l42,78 e|********* m43,67 l45,67,45,66,53,66,53,65,54,65,54,67,55,67,55,71,56,73,56,84 e|********* m48,83 l48,82,51,82,51,81,52,81 e|********* m83,33 l78,33,78,34,76,34,75,35,73,36,73,37,72,38,71,38,68,41,67,41 e|********* m64,44 l64,47,65,48,65,51,66,52,66,62 e|********* m68,46 l71,46,71,45,74,45,75,44,79,44,79,46,78,46,78,86,77,87,77,89,76,89,76,86,75,85,75,84,74,83,74,82,73,80,72,79,72,78,71,77 e|********* m63,51 l63,50,75,50 e|********* m69,55 l78,55 e|********* m60,61 l61,61,61,60,63,60,63,59,65,59,65,58,78,58 e|********* m64,71 l64,69,66,67,68,66,70,64,72,63,75,61,78,58,79,58,79,57 e|********* m81,54 l83,53,84,53,85,52,88,52,90,51,107,51,109,50,109,48 e|********* m101,36 l101,37,100,37,100,43,99,44,99,90,97,90,97,89,96,89,96,88,95,87,95,86,92,83,92,82,91,82,91,80,90,80,90,79,89,78,89,77,88,76 88,73 e|********* m86,60 l86,62,89,62,91,63,93,63 e|********* m110,37 l112,37,112,36,114,36,116,35,127,35,130,36,134,37,138,37,143,38,163,38,163,43,162,44,161,46,158,49,156,50,154,50,151,52,149,52,146,54,140,54 140,55,143,55,144,56,144,88,143,88,143,89,142,91,123,91,123,90,122,88,122,82 e|********* m169,85 l169,88,181,88,181,83,180,83,180,82,170,82,170,91,171,92,171,85 e|oval;165;93;53;48;21600,21600;***|*179;106;6;7;*****|*197;109;4;9;*****|*186;122;11;5;*****[/whitepad]

用台钻打 打的时候拉一下就行了