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Lines with DATUM TARGET in DRAFTING

Experimenter
Experimenter

Please look into the Drawing image that i have attached. I would like to know the following things.

1) What do these highlighted bubbles signify ? Are they Datum Targets ? If so, whats its significance ?
2) How can i draw these Horizontal and Vertical lines, as shown in the image while Drafting?
    I believe they arent grid lines.
3) X,Y & Z is mentioned in the Bubbles, Does it signify the position of the component along these axis with respect to the home position in 3-D Space i.e( X=0 , Y=0 , Z=0 ) ??

    How do i draw them?
   

4 REPLIES

Re: Lines with DATUM TARGET in DRAFTING

Gears Phenom Gears Phenom
Gears Phenom

To me, it looks like a grid, with 'station marks'.  As if the part is located in assembly space, and the grid shows where it is from absolute assembly 0,0,0.  ie at a previous race team, we would assemble a full car grid, with every 10" marked with a number in a circle, then chassis parts could be located that way.

-Dave
NX 11 | Teamcenter 11 | Windows 8.1

Re: Lines with DATUM TARGET in DRAFTING

Siemens Legend Siemens Legend
Siemens Legend
It tells you where this component will be located in space when assembled. - when cars where drawn by hand, full scale, on paper, this grid was a common method to "split up the work" to different designers, and the reference grid to place dimensions to.

Regards,
Tomas

Re: Lines with DATUM TARGET in DRAFTING

Experimenter
Experimenter

Thank you Tomas.

How do we draw those lines in drafting??

Re: Lines with DATUM TARGET in DRAFTING

Experimenter
Experimenter

Hello Peter, any answer about this topic?