500 Series dimensions - PCB offset

[anythingcansoundgood]

Hello!
I've been searching for this answer for a long time but haven't found anything satisfactory.
I want to know the dimensions for the PCB 'offset' (and its corresponding EDAC placement) in relation to the side of the front panel.
Online, there are two screenshots of a CAD: one showing 11.1252mm, and another where I calculated 0.312 inches, which gives 7.9248mm.
Which one is correct? Thanks!

Here are the images :

 

[thelivingroom]

Hello!
I've been searching for this answer for a long time but haven't found anything satisfactory.
I want to know the dimensions for the PCB 'offset' (and its corresponding EDAC placement) in relation to the side of the front panel.
Online, there are two screenshots of a CAD: one showing 11.1252mm, and another where I calculated 0.312 inches, which gives 7.9248mm.
Which one is correct? Thanks!

Here are the images :
View attachment 140162
View attachment 140163

Both of those drawings are .438”/11.1252 mm from the center of the front panel to the center of the PCB, resulting in .312”/7.9248 mm from the left edge of the front panel (looking from the front) to the center of the PCB.

 

[anythingcansoundgood]

Both of those drawings are .438”/11.1252 mm from the center of the front panel to the center of the PCB, resulting in .312”/7.9248 mm from the left edge of the front panel (looking from the front) to the center of the PCB.

Oh ! How could I miss that... Thanks a lot !

 

[richiyobs]

In my last 500 project i placed the PCB center at 11.1mm respect to the mounting hole, the center of the panel.... It fits fine into the lunch-box.
If i'm not wrong the edac connectors into the motherboard are spaced 38.1mm

 

[sahib]

In my last 500 project i placed the PCB center at 11.1mm respect to the mounting hole, the center of the panel.... It fits fine into the lunch-box.
If i'm not wrong the edac connectors into the motherboard are spaced 38.1mm

You are correct.

However, 38.1mm is the standard pitch for 500 format. As the module mounting holes are in the centre of the module front panel, the distance between the module mounting holes is also 38.1mm. This becomes your reference point.

Then the card edge connector centre, hence the centre of the PCB is 11.1 mm off-set to the left of the module centre.

A very important point.

The module front panel width also becomes 38.1mm on paper. But in practice make the front panel narrower by about 0.2 to 0.4mm.

 

[richiyobs]

A very important point.

The module front panel width also becomes 38.1mm on paper. But in practice make the front panel narrower by about 0.2 to 0.4mm.

Perfect... I learned It from MidnightArrakis...
Also Frank from frontpanel.de, Who advised to make 37.7mm width...
Most mechanical drawings are not showing this importat info, Just to get a bit of clearance between modules