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From:	karl AT aspodata DOT se
To:	geda-user AT delorie DOT com
Subject:	[geda-user] pin drill and thickness statistics from cvs.gedasymbols.org
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Message-Id:	<20180114202623.3E2608076F36@turkos.aspodata.se>
Date:	Sun, 14 Jan 2018 21:26:23 +0100 (CET)
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Reply-To:	geda-user AT delorie DOT com

 Since I'm maintaing my fp generator, I wished to see what others
have used for the "thickness" parameter of the Pin, so I collected
the result here (everything in mm, rounded to 1/10th mm):

 http://turkos.aspodata.se/git/openhw/share/pcb/data_from_cvs.gedasymbols.org/

0.8, 1 and 0.4 seems to be the most popular hole sizes:

$ grep : pin_statistics | grep -v Drill | sort -nr -k2 | head
0.8: 6239
1: 5453
0.4: 3226
0.9: 1719
0.7: 1193
1.1: 1095
1.3: 594
1.2: 530
0.6: 444
1.4: 437

O.4 holes tend to attract 0.8, 1.5 and 2.0 annulus sizes:

0.4: 3226
 0.8 1849
 1.4    6
 1.5  652
 1.8   27
 2.0  686
 2.3    6

but 0.5 holes seems to want a tight annulus

0.5: 382
 0.9   47
 1.0   71
 1.3  221
 1.5    4
 1.6    8
 1.8    7
 1.9   18
 3.0    6

in contrast to 0.6, which doesn't fuss

0.6: 444
 0.9    8
 1.0   33
 1.1   25
 1.2   20
 1.3    2
 1.5   10
 1.7    6
 2.0  340

///

My intent is to see if I can deduce suitable "tight", "normal" and
"for hobbyist" sizes of cu.annulus for each drill bit size for the 
fp.generator.

Regards,
/Karl Hammar

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