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V-Groove scoring questions
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farmakon 7 years ago
Greetings, I'm aware there is already a number of threads about this topic but I need to ask specific questions. What I'm trying to do here is to make a PCB with a section that can be removed by snapping it off by hand. I was thinking of using a V groove on one side of a two-sided board and run traces on the other side. Now, my questions are: 1) Is a V groove on one side alone enough to break the PCB portion by hand? 2) Should I reduce the width of the traces across the breaking section for a cleaner cut? 3) Will the groove increase the PCB cost? If so, by how much? 4) What angle of the V groove is recommended? 30° or 90°? And how deep into the PCB should it run? 5) In case I want to keep the board as a whole, will the groove make the board too fragile? Thank you for your time and replies.
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dillon 7 years ago
V-CUT is free, can you show your gerber image, or send an email to support@easyeda.com
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dillon 7 years ago
Very small size PCB V-cut is not free. the PCB size should bigger than 2cm*2cm
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farmakon 7 years ago
The Gerber is [here][1]. All my previous questions remain, I'm looking for some experienced users to tell wheter this is feasible or not. Thanks. [1]: https://gerber-viewer.easyeda.com/showcase/#!id=7064ee34d80b11e79ed5026a86b9cae7 "here"
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andyfierman 7 years ago
@farmakon, I think you are not getting much help on this because you are asking questions that are too wide ranging. You are asking about general PCB fabrication techniques without making any specific references to the processes used by or available from EasyEDA. I think the question you should ask first is: `(0) Does EasyEDA support single sided V-cut?` If the answer to this simple question is `No` then all your subsequent questions are irrelevant, at least in the context of the EasyEDA forum. `1) Is a V groove on one side alone enough to break the PCB portion by hand?` You cannot answer that question without stating the depth of the V-Cut. Obviously a shallow V-Cut will make it hard to snap the board apart but at the same time will increase the rigidity of the board. Conversely, a deep V-Cut will make it easy to snap the board apart but at the same time will reduce the rigidity of the board. `2) Should I reduce the width of the traces across the breaking section for a cleaner cut?` Most literature I have read prohibits crossing lines that define edges that will be created by a V-Cut. This appears to be the case for single or double sided V-Cuts. **This implies that you run traces over the line of a single sided V-Cut (on the opposite side of the board from the V-Cut of course) at your own risk.** Reducing the trace width over such crossing points may help in breaking the tracks cleanly but at the same time may also increase the risk of them fracturing during the V-Cut process and subsequent handling of the board. To prevent any traces that are run over the other side from a single sided V-Cut from tearing up off the surface of the board, it is probably best to snap the board by pushing into the V-Cut face: ![enter image description here][1] `3) Will the groove increase the PCB cost? If so, by how much?` Dillon has already answered this question but you need to answer question (0) for his answer to have any meaning. 4) What angle of the V groove is recommended? 30° or 90°? And how deep into the PCB should it run? That is almost certainly something that the PCB fab will decide and therefore is out of your control. See also (1). 5) In case I want to keep the board as a whole, will the groove make the board too fragile? See (1). Also, `too fragile` depends on what you are going to do with the board and how it is to be assembled. I suggest you do some searching on: `V_cut pcb` and finding stuff like: http://www.electronicdesign.com/boards/pcb-designers-need-know-these-panelization-guidelines http://blog.epectec.com/v-scoring-of-printed-circuit-boards-in-arrays [1]: /editor/20171204/5a242bbf6b04f.png
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farmakon 7 years ago
@andyfierman Hello and thank you for your answers. I actually didn't ask if EasyEDA supported single sided V-grooves because I took it for granted; perhaps wrongly so. I've read through your post and the links your provided. I gotta say, while I'm open to experimentations, it looks like it could come out to be rather unpredictable and unreliable. I guess I'll just drop the idea. Thank you for your time and reply.
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wowi 6 years ago
@andyfierman thanks for the detailed info... i am still learning...
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andyfierman 6 years ago
@wowi, This thread had some links to information about PCB fabrication that you may find useful: [https://easyeda.com/forum/topic/Artwork-for-PCB-7ef333f4c67949f595ec9e17b0cb2eb8](https://easyeda.com/forum/topic/Artwork-for-PCB-7ef333f4c67949f595ec9e17b0cb2eb8)
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