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confused about euro panel spec standard.
MUFF WIGGLER Forum Index -> Music Tech DIY  
Author confused about euro panel spec standard.
dmitri
Chart on this page says that the panels should be smaller in width than the distance between the holes ?
How could that be ? What is he trying to say ?
I got 128.5mm in height,
Mounting holes are 3.2mm diameter
The center of the mounting holes are 3.0 from the edge,
Distance between holes must be in multiples of 5.08mm to match pre tapped rails...
I have a 128.5mm x 101.6 mm panel.
The mounting holes are 18 hp a part (91.44) so...
Would this panel be 18hp or 20 hp, or neither ?

http://www.doepfer.de/a100_man/a100m_e.htm




d
theabsent
dmitri wrote:

I have a 128.5mm x 101.6 mm panel.
d


21.2HP : )
JP
Quote:
Width is specified by the horizontal pitch unit 'HP', with 1 HP being 0.20 inches (5.08 mm).


From the "euro" origins

http://en.wikipedia.org/wiki/Eurocard_(printed_circuit_board)
bleeps
This might help too, Graham Hinton dropping the know:
https://www.muffwiggler.com/forum/viewtopic.php?t=45388
samuraipizzacat29
I just think the dimensions lines where it says "n x 5.08" should go to the edges of the panel, not to the center of the holes. I've always used the "actual module width" column as my calculations and it's generally within .1 mm
e-grad
dmitri wrote:
Would this panel be 18hp or 20 hp, or neither ?


20hp.
negativspace
Yep, 20hp as stated. Simply divide your width (101.6) by 5.08, comes to exactly 20. The left-most mounting hole is 7.5mm in from the left panel edge, and then the right-most mounting hole is spaced by some multiple of 5.08, relative to that hole - so it may not necessarily be 7.5mm from the right edge.

The rest of what you wrote looks accurate to me. thumbs up
CJ Miller
bleeps wrote:
This might help too, Graham Hinton dropping the know:
https://www.muffwiggler.com/forum/viewtopic.php?t=45388


He clarified it for me there also.

Mods! Please sticky that thread!
oldenjon
I'm designing a panel that uses 3.5mm kobiconn jacks and 16mm Alpha pots. What is the standard diameter for jack holes, and minimum diameter for 16mm pots? It might be wise to leave a little wiggle room in the latter case if you're using PCB mounted pots, but I have my board on brackets. This information doesn't seem to be easily found with a search.
samuraipizzacat29
I use 6mm and 7mm respectively for jacks and pots. If there's ever a question, I usually consult the datasheet for the parts to make sure I'm at least close. And then, like you said, make a bit bigger if you're not confident.

Nate
hexinverter
oldenjon wrote:
I'm designing a panel that uses 3.5mm kobiconn jacks and 16mm Alpha pots. What is the standard diameter for jack holes, and minimum diameter for 16mm pots? It might be wise to leave a little wiggle room in the latter case if you're using PCB mounted pots, but I have my board on brackets. This information doesn't seem to be easily found with a search.


The ideal standard jack/pot size is 6/7mm, respectively. That is for Kobiconn/Erthenvar/etc. jacks and standard 16mm panel mount Alpha-style pots.

However, you will probably want to add some tolerance to that for PCB/panel manufacturing tolerances.

I add .5mm to each hole diameter.

So, 6.5mm for jacks and 7.5mm for pots.
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