Thanks Guys...
I finally got a good plot with the desired line weightswith a large format HP plotterusing the following results.
! white entities (object lines)
pen 1 thickness .02 in; drawing_color; color 0.0 0.0 0.0;<?:namespace prefix = o ns = "urn:schemas-microsoft-com

ffice

ffice" />
! yellow entities (text, dimensions, cross hatching)
pen 2 thickness .016 in; letter_color; color 0.0 0.0 0.0;
! grey entities (hidden lines)
pen 3 pattern 0.05 0.05 in; thickness .016 in; half_tone_color; color 0.0 0.0 0.0;
! red entities (can use for drawing border if you change the entity color
! to red in the format file)
pen 4 thickness .030 in; highlite_color; color 0.0 0.0 0.0;
! green entities (sheetmetal)
pen 5 thickness .020 in; attention_color; color 0.0 0.0 0.0;
! cyan entities (section lines)
pen 6 thickness .016 in; color 0.0 0.0 0.0;
! grey entities (dimmed menu lines)
pen 7 thickness .010 in; dimmed_color; color 0.0 0.0 0.0;
! blue entities (edge high lines)
pen 8 thickness .020 in; edge_highlite_color; color 0.0 0.0 0.0;
Best reguards,
Patrick