topic Re: Strange conversion number in Libraries & objects

Strange conversion number

Erich — Fri, 16 May 2008 05:00:14 GMT

Folks,

Can anyone explain to me why I am getting the strange conversion number (highlighted) in my GDL to get a part to display correctly?

FOR i=0 TO thrdlen*tpi*39.4-1
POLY2_B 7, 3, 6, 91,
shnk/2-H, 0, 1,
-shnk/2+H, -yht, 1,
-shnk/2, -yht-P/2, 1,
-shnk/2+H, -yht-P, 1,
shnk/2-H, -P, 1,
shnk/2, -P/2, 1,
shnk/2-H, 0, 1
ADD2 0, -P
NEXT i

I arrived at this number by measuring the distance the loops was to cover versus the distance it actually did without the conversion. I would understand if it were 25.4 or some similar conversion number, but 39.4 doesn't match anything I would expect. BTW there are no MUL statements or anything similar in the coding.

Can anyone enlighten me?

Re: Strange conversion number

Erika Epstein — Fri, 16 May 2008 05:14:11 GMT

39.4 sounds like the inch equivalent of a meter.

Re: Strange conversion number

vistasp — Fri, 16 May 2008 16:03:55 GMT

Hi Erich,

Erika is right. And if accuracy is important, you could use 39.37 (divide 100cm by 2.54 and you have it.)

Re: Strange conversion number

Erich — Sat, 17 May 2008 16:07:33 GMT

Thanks, that makes perfect sense and I should have seen it.

Re: Strange conversion number

Laszlo Nagy — Sat, 17 May 2008 17:00:50 GMT

The probable reason for that number is that GDL scripts are always in meters, even if your Project is set to Imperial units. So I guess in some cases numbers need to be converted from meters to inches.