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. We found that an average total heating time of 4 to 4½ minutes (240-270 seconds) is a good, relatively conservative estimate. For this simple calculation, we recommend that you ignore the cooling part of the welded profile
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. In my example, b and b1 is set to be max 1 mm, however, W and W1 is calculated to be only 0.93, why not >=1? Tom H Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic1396&OB=ASC.html
. In my example, b and b1 is set to be max 1 mm, however, W and W1 is calculated to be only 0.93, why not >=1? Tom H Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/topic1396&OB=DESC.html
Posted: 25 Aug 2014 at 6:57pm The answer to your question is that the "Side" solder joint goals for the pad width calculation are equal to or less than the Max Lead Width
| https://unisoft-cim.com/rotation-understanding-component-rotations.html
3.3 also presented in the IPC-7351B documentation and this defines the calculation of a rotation as follows: "The rotation attribute is of type nonNegativeDouble that defines the rotation of a shape about the local origin
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..." box you're overriding the calculation and forcing the use of whatever values are entered in each textbox adjacent to the referenced dimension
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" Posted: 18 Apr 2013 at 11:39pm For example, if you create a molded body inductor and then fill in the manufacturers recommended footprint dimensions S, L and W but leave L1 and W1 unfilled
| http://etasmt.com/te_news_bulletin/2019-12-26/13361.chtml
. We found that an average total heating time of 4 to 4½ minutes (240-270 seconds) is a good, relatively conservative estimate. For this simple calculation, we recommend that you ignore the cooling part of the welded profile
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/RSS_new-2016-solder-joint-goals_topic1921.xml
. Therefore, regardless of the Terminal Lead Height, the maximum Toe value for Pad size calculation is 0.50 mm. Here is an example of a Gull Wing Terminal Lead and the calculation of the Toe value. Note
PCB Libraries, Inc. | https://www.pcblibraries.com/forum/chips-add-more-types-of-silkscreens_topic3026_page2.html
... You can refer to the solidworks formula calculation method to follow up a better solution; relying on Footprint to Designer too much is not a long-term solution
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