Author Topic: X-ray inspection  (Read 1054 times)

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Offline IconicPCBTopic starter

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X-ray inspection
« on: December 15, 2022, 06:41:55 pm »
I am considering getting an Xray inspection unit.
I am worried the unit performance might be a bit mediocre as it employs a source with a 100um target ( source of X ray radiation) at 60KV.

Any opinions and comments?
 

Offline mikeselectricstuff

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Re: X-ray inspection
« Reply #1 on: December 15, 2022, 07:17:20 pm »
What exactly are you wanting to inspect?
Youtube channel:Taking wierd stuff apart. Very apart.
Mike's Electric Stuff: High voltage, vintage electronics etc.
Day Job: Mostly LEDs
 

Offline TimFox

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Re: X-ray inspection
« Reply #2 on: December 15, 2022, 08:57:19 pm »
Such a tube is used with geometric magnification of an object close to the tube, and a flat-plate or film far from the object.
Tubes with larger tube targets are used at low magnification, with the object close to the film.
An older reference on radiography:
https://www.glaciermedicaled.com/courses/301/07_Technique_Factors.htm
 

Offline IconicPCBTopic starter

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Re: X-ray inspection
« Reply #3 on: December 16, 2022, 04:10:31 am »
Mike,

solder joints.

Tim,

Thank You.
Always good to learn something new.

I can not comment on the tube to test object distance other than to say the distance is in the 20 to 30mm range.
X-Ray Flat sensor image resolution: 2.1million pixels, 18lp/mm, pixels size:
18um
Effective detect image area and format: 30*30mm

This all sounds clever and vaguely right but what can I expect?


 

Offline IconicPCBTopic starter

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Re: X-ray inspection
« Reply #4 on: December 17, 2022, 09:00:00 pm »
no takers?
 

Offline Jackster

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Re: X-ray inspection
« Reply #5 on: December 17, 2022, 09:31:17 pm »
I was told by one of the experts on this forum not to get anything under 90kv for BGA components. Ideally, 120kv or higher if I recall correctly.
Apparently, the tubes also degrade over time/use so that 60kv is probably a lot less than 60kv if it is old or well-used.

The guy is online every so often. He might pop in and give you some info.


Offline TimFox

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Re: X-ray inspection
« Reply #6 on: December 17, 2022, 09:58:36 pm »
The tubes may degrade over time (and the focal spot become larger or current capability decline), but the voltage is determined by the power supply.
 

Offline IconicPCBTopic starter

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Re: X-ray inspection
« Reply #7 on: December 21, 2022, 08:07:13 pm »
whimper?
 


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