Need advice detect small objects in a tube.
Need advice detect small objects in a tube.
(OP)
I need to detect presence/absence of small rifle primers stacked in a vertical stainless tube.
Tube ID is approximately .185", OD is approximately .3125"
Primers in the tube are .175" in diameter and .12" tall.
What would you recommend for sensor and how to mount on a round tube to detect when the tube is empty. Maximum flow is about 2 per second. Under normal conditions they will be "stacked" and flow will be continuous unless the machine runs out in which case a trigger is necessary to halt production.
Tube ID is approximately .185", OD is approximately .3125"
Primers in the tube are .175" in diameter and .12" tall.
What would you recommend for sensor and how to mount on a round tube to detect when the tube is empty. Maximum flow is about 2 per second. Under normal conditions they will be "stacked" and flow will be continuous unless the machine runs out in which case a trigger is necessary to halt production.
RE: Need advice detect small objects in a tube.
> backpressure -- something akin to the glaucoma pressure test pulsed pressure
> laser reflectance -- shine laser down the tube, look for reflection
> photoelectric transmission -- shine light from other end of tube, look for absence.
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
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RE: Need advice detect small objects in a tube.
RE: Need advice detect small objects in a tube.
That's certainly doable, but you'd need:
> light shielding to prevent stray light from the detector
> possibly fiberoptic on both source and detector
> if no other optics, then tube ends need to be within 0.2" to minimize stray light
How are the tubes going to positioned laterally?
Are the tubes stopping at all?
What tells the sensor when a tube will be directly aligned with the source?
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
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RE: Need advice detect small objects in a tube.
I have seen thousands of fiber sensors, etc. yet having no experience in this I need some help with exactly what is necessary to purchase. Can you make recommendations on exact model/mfg and components necessary and perhaps how to mount. I have complete design latitude. Thanks for your input! I'm trying to decide if I want to go with PLC or solid state.
RE: Need advice detect small objects in a tube.
as for the rest, sorry, I do have a day job. You should probably find a job shopper
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
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RE: Need advice detect small objects in a tube.
You may be able to do this with a simple one sided retro-reflector model reducing it to only one hole in the side of the tube.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Need advice detect small objects in a tube.
I might also try a trick from the bowl feeder folks. Instead of a perpendicular through hole I would put bigger holes or slots on either side in order to make the beam axis more parallel with the tube axis. That way my sensor would see more than one object.
TygerDawg
Blue Technik LLC
Virtuoso Robotics Engineering
www.bluetechnik.com
RE: Need advice detect small objects in a tube.
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers Entire Forum list http://www.eng-tips.com/forumlist.cfm