Preferences question - Terminal SM oversize
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Category: PCB Footprint Expert
Forum Name: Questions & Answers
Forum Description: issues and technical support
URL: https://www.PCBLibraries.com/forum/forum_posts.asp?TID=2328
Printed Date: 19 Nov 2024 at 6:50am
Topic: Preferences question - Terminal SM oversize
Posted By: jnshah
Subject: Preferences question - Terminal SM oversize
Date Posted: 20 Apr 2018 at 12:11pm
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Hi, If I change the preferences for Soldermask oversize (for e.g. outward L terminal), it seems to be rounding up the Y oversize to a single precision. For example, if I specify 0.07mm, The result for a pad that is 0.30 in copper ends up being 0.50 for soldermask and not 0.44. The X dimension works correctly and does not round up. This is with 2018-04 Pre-release. I will appreciate an explanation. Thank you.
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Replies:
Posted By: Jeff.M
Date Posted: 20 Apr 2018 at 6:44pm
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Please provide a specific example that we can use to look into your report. Thanks. ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - Twitter - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |
Posted By: jnshah
Date Posted: 21 Apr 2018 at 6:00am
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Hi Jeff, Here is one FPX file with a part where this happens. After your question, I have found that it does not happen with every part.   |
Posted By: jnshah
Date Posted: 21 Apr 2018 at 6:02am
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Here is the file: uploads/11567/New_Parts_Copy_2018-04-21_06-02-22.fpx" rel="nofollow - uploads/11567/New_Parts_Copy_2018-04-21_06-02-22.fpx
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Posted By: Jeff.M
Date Posted: 24 Apr 2018 at 9:08am
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There's a Rule preference option called 'Minimum Gang Solder Mask Web'. What happens when the spacing between adjacent pad solder masks falls below that value, solder mask automatically expands to reduce the web to zero -'ganging' the masks together. It appears that's happening to your part. Change the rule 0.01, for example, and watch what happens. Jeff ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - Twitter - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |
Posted By: jnshah
Date Posted: 26 Apr 2018 at 6:59am
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Thank you. Yes, that is it. |