Date:2011-09-05 04:05:25 (8 years 12 days ago)
Author:Werner Almesberger
Commit:e67eab1aa1fe5adbed53bc2d799a1cb512aa61ce
Message:labsw/LOG: added front plate milling results

Files: labsw/LOG (2 diffs)

Change Details

labsw/LOG
3232PCB milling #3:
3333- changes made:
3434  - corrected clearance
35  - Tesa 5767 mounting tape
35  - Tesa 5767 mounting tape (no longer available)
3636- measurements:
3737  - column cavity: ~7.6 mm x 10.3 mm (nom. 8.0 x 10.4 mm)
3838  - board: 102.2 mm x 50.2 mm (nom. 102.0 mm x 50.0 mm)
...... 
8484  - the footprints of the 1 W resistors (R7-R10) are way too short.
8585    Placed 0805 instead.
8686
87--- Sun 2011-09-04 ------------------------------------------------------------
88
89Milled face plate #0:
90- setup:
91  - board is pertinax
92  - locally sourced "W.T." (Taiwan) mounting tape
93- measurements:
94  - board: 104.0-104.1 mm x 35.1-35.6 mm (nom. 104.0 mm x 35.0 mm)
95  - button hole: 12.6-12.8 mm x 11.3-11.6 mm (nom. 12.6 x 11.3 mm)
96- defects found:
97  - engraving depth (0.2 mm) is a bit shallow, probably due to board
98    curvature
99  - got the banana jack diameter wrong: should be 8 mm, not 6 mm
100  - button holes show significant deviation from tool path on lower
101    edge
102- changes for next run:
103  - increase engraving depth to 0.5 mm (board is 1.6 mm)
104  - correct banana jack hole diameter
105
106Milled face plate #1:
107- changes made
108  - increased engraving depth to 0.5 mm
109  - increased banana jack hole diameter to 8.0 mm
110- defects found:
111  - job didn't complete because board became unstuck while milling
112  - the 8.0 mm hole is still a bit too tight if jack sleeve is at
113    upper end of tolerance range
114  - noticed that the button holes are milled last, after cutting the
115    board outline. This explains the poor accuracy.
116
117---------------------
118
87119(next run)
88120- changes made
89121  - made 5V relay traces go clearly for the centers of the respective pins

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