V-groove question

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When the fab people cut a V-groove for depaneling, do they u... - May 24, 2006 by Steve Thomas

They cut it dry. Most shops use a rotating blade, some use '... - May 24, 2006 by Martin Gershenson

I think I phrased that poorly. I'm talking about cutting the... - May 24, 2006 by Steve Thomas

Hi Steve, Nope, you phrased it perfectly, and I knew wha... - May 26, 2006 by Martin Gershenson

Hi Steve, I would say that 98 % of score shops do them dr... - May 30, 2006 by

It's dust contamination. Most of the boards have loose dry d... - May 30, 2006 by Steve Thomas

Steve Thomas

#41763

V-groove question | 24 May, 2006

When the fab people cut a V-groove for depaneling, do they use a lubricant on the router or do they cut it dry?

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Martin Gershenson

#41764

V-groove question | 24 May, 2006

They cut it dry. Most shops use a rotating blade, some use 'skiving' just pushing the PCB past a v shaped blade. Don't know how popular the latter is anymore though.

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Steve Thomas

#41765

V-groove question | 24 May, 2006

I think I phrased that poorly. I'm talking about cutting the V-groove into the panel by the fabricator so that it can be depaneled later.

Or did you understand me perfectly? :P

I ask because your description sounds like the depanelers I've seen used in assembly shops.

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Martin Gershenson

#41856

V-groove question | 26 May, 2006

Hi Steve,

Nope, you phrased it perfectly, and I knew what you were asking. The equipment is very similar in concept, except on the fab side it has much tighter tolerances and a different blade type.

If you want to see one, check out this page

http://www.stech.co.jp/new-stech/product-e/V-cut/mvd-600a/mvd-600a-e.html

Since we rep Shoda I will reserve comments on different equipment brands, but this should give you a little detail.

Martin

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Board House

#41899

V-groove question | 30 May, 2006

Hi Steve,

I would say that 98 % of score shops do them dry, When the product gets back to the board house they would run the panel through a rinse dryer to get the score dust off of the Panel, Most Score machines have Vacuums built into the cutter heads to help reduce the dust, but even with the vacuum the panels are still pretty dusty.

Are you asking this because of a dust contaminate issue or our you concerned about fractures?

Regards, Mike / Board House

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Steve Thomas

#41901

V-groove question | 30 May, 2006

It's dust contamination. Most of the boards have loose dry dust on them but a few have what looks like a dried slurry.

Either way I'm not impressed. This is the second batch, the first one had obvious *visible* shorts on boards that were alledgedly tested.

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