Pads Layout Gerbers / NC Drill

[[email protected]]

Has anyone used Pads layout to produce gerber files before? I've got
it to the stage where most of the layers in my design are looking
good when imported into GC Prevue. But i can't get the NC Drill layer
to come out to scale. For the other layers i had to go into advanced
options and select metric over english. But the NC drill layer is
always out of scale, if i select english it comes out too small and if
i select metric it comes out far too big. Any ideas anyone?

I'm bound to just be missing a setting but i can't find it.

Thanks

Andrew

 

[[email protected]]

Has anyone used Pads layout to produce gerber files before? I've got
it to the stage where most of the layers in my design are looking
good when imported into GC Prevue. But i can't get the NC Drill layer
to come out to scale. For the other layers i had to go into advanced
options and select metric over english. But the NC drill layer is
always out of scale, if i select english it comes out too small and if
i select metric it comes out far too big. Any ideas anyone?

I'm bound to just be missing a setting but i can't find it.

Thanks

Andrew

You have to find where you set the number of digits. You'll see
something like 2.3 for example, which means the drill tape will have
two digits before the decimal point and three after. If your gerber
viewer is looking for 3.2 it will interpret 02.500 as 025.00 for
example making your drill tape 10 times too big.

 

[[email protected]]

You have to find where you set the number of digits. You'll see
something like 2.3 for example, which means the drill tape will have
two digits before the decimal point and three after. If your gerber
viewer is looking for 3.2 it will interpret 02.500 as 025.00 for
example making your drill tape 10 times too big.

Thanks for the reply, however i'm still confused. Other NC drill
layers (created by other people) i import seem to have this
information embedded in the file and GC Prevue happily displays it to
scale. The NC drill layer i produce never seems to have the settings
right (i have 3 leading and 5 trailing). Even when i manually
configure GC Prevue to have the 3 and 5 it doesn't come out right. It
does also ask for another setting - Embedded drill table units - which
i don't know what i should set it to. Any ideas?

Andrew

 

[[email protected]]

You have to find where you set the number of digits. You'll see
something like 2.3 for example, which means the drill tape will have
two digits before the decimal point and three after. If your gerber
viewer is looking for 3.2 it will interpret 02.500 as 025.00 for
example making your drill tape 10 times too big.

Actually i've just found a setting which has solved things - in the
device setup for the drill i choose EIA-244 instead of ASCII and the
layer imported to scale.

Thanks

Andrew