Glass bottle detection

mavrick · Jul 11, 2015

I was looking for some help with a sensor. I'm currently trying to detect a lug or (gap in the glass) on the bottom of a glass bottle. The only option I have at positioning the sensor is horizontal with the bottle at about 7in. of distance . I'm currently trying a Keyence distance detecting sensor but seem to get fluctuating outputs when the lug is spotted. Which in return causes the releasing orientation of my bottle to be in consistent. The gap is about 1/4in. wide and 1/4in tall. Any help would be appreciated.

bkottaras · Jul 11, 2015

I've had good luck with Tri-Tronics sensors.
You may also find a model with fiber optic extensions and manage to position it closer to the target which will make your life a lot easier.
http://www.ttco.com/

shooter · Jul 11, 2015

use a laser and a motorized mirror, and scan the bottom of the bottle, when the laser sees the gap it can be detected with a simple cell.
on the motor you can use a sensor to zero the position and with time you can see when the gap is detected.

mavrick · Jul 12, 2015

do you have link to the motorized mirror sensor your referring to?

dploof23 · Jul 13, 2015

Which sensor model are you using from Keyence? I use the LR-Z series sensors with applications like yours.

Regards,
Dave

rob0tuss1n · Jul 13, 2015

I have no experience with Keyence, but Wenglor has a sensor that'll do it. I'd suggest the KN55PA3 and the Reflector, which is part number RE6040BA. This sensor is made for detecting clear objects like PET bottles or glass. You can adjust the switching distance on via a small trim pot to tweak it in for your application. It's got a max range of 500mm, or about 20". You should not need some weird motorized sensor, just a place on each side of the bottle to mount the sensor and the reflector.

The page for this product is online here.

Full disclosure: I represent Wenglor in the Southwest United States. If you need additional information on the product or where to get it just PM me or make an inquiry through the website I linked.

califflash · Jul 13, 2015

+1 for Keyence!

I use their LR-T series extensively. The Keyence stuff I use gives me the least amount of trouble out of any component.

mavrick · Jul 13, 2015

I'm currently trying the Keyence LR-TB2000 and so far I have no luck. I get a lot of false outputs when I increase the velocity on the servo. I have also tried a banner diffuse sensor to compare the difference between the label and the bottle. I have also tried a banner fiber optic senor with absolutely no success. The diffused sensor so far is the best with no false triggers but I can't seem to get it to trigger the output in the same place on the label. I am basing all my data on the release position of my bottle after it has been oriented. What is the chance's of the kinetix 300 servo drive causing some incorrect orientation? Any help would be greatly appreciated, I'm tired of banging my head against the wall. The banner sensor model# QS-18 series I don't have the exact model number. Balluff mentioned using their capacitive sensor for this application.

mavrick · Jul 13, 2015

As for the sensor with the reflector I can't use it in this application because I'm looking for a registration point on the bottle. thanks for the option tho.

PLC GURU · Jul 13, 2015

you may have to do some programming to filter out the "noise"

dploof23 · Jul 14, 2015

What kind of false triggering are you experiencing? Is it a flickering type scenario? I use the LR-ZB240CB and you can filter out false flicker type triggering by adjusting the response speed which is built into the sensor. No additional programming required.

Dave

osmanmom · Jul 14, 2015

i don't understand what this means 'detect a lug

https://www.ia.omron.com/data_pdf/cat/e3zm-b_ds_e_4_7_csm2160.pdf?id=1897

ndzied1 · Jul 14, 2015

Balluff has a line of transparent detectors:
http://www.balluff.com/balluff/MUS/en/products/transparent.jsp

If you would like to test them out, call your local Balluff rep and they should be able to send a sample to Balluff to see if they can make one of their sensors work for your application.

<disclaimer - I work for a Balluff distributor>

just the cowboy · Jul 14, 2015

Looking at the bottom of a glass bottle is hard

We had small glass bottles to check and alway had problems due to differances in the glass

gclshortt · Jul 14, 2015

https://www.ia.omron.com/products/family/1157/lineup.html

Omron makes a glass bottle detector. I have used this to detect stretch wrap and clear plastic bottles.

This may be worth a look.

Garry
http://www.accautomation.ca

Glass bottle detection

mavrick

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