You are not registered yet. Please click here to register!


 
 
plc storereviewsdownloads
This board is for PLC Related Q&A ONLY. Please DON'T use it for advertising, etc.
 
Try our online PLC Simulator- FREE.  Click here now to try it.

---------->>>>>Get FREE PLC Programming Tips

New Here? Please read this important info!!!


Go Back   PLCS.net - Interactive Q & A > PLCS.net - Interactive Q & A > LIVE PLC Questions And Answers

PLC training tools sale

Reply
 
Thread Tools Display Modes
Old February 14th, 2018, 08:35 PM   #1
makr8100
Member
United States

makr8100 is offline
 
Join Date: Jan 2018
Location: USA
Posts: 14
Sensor Selection

I am looking for a sensor that is PNP 24V that can sense distance up to 2m, and have had the best luck with lasers. We only need a digital out so instead of dropping a thousand on Keyence LR-T sensors each time production breaks them does anyone know of a sensor with configurable distance and digital out? Unfortunately we need to read white on white, so that rules out the standard photo eyes. We've attempted beams and reflectors but of course with 2 parts to each of those options they break twice as often.
  Reply With Quote
Old February 14th, 2018, 09:08 PM   #2
Geoff White
Member
Australia

Geoff White is offline
 
Join Date: Oct 2005
Location: Brisbane
Posts: 258
You might have better luck if you describe the situation better. Ultrasonic or Time of Flight sensors are good for single ended operations.
  Reply With Quote
Old February 14th, 2018, 09:09 PM   #3
seth350
Member
United States

seth350 is offline
 
seth350's Avatar
 
Join Date: Jul 2011
Location: Over yonder
Posts: 186
Ultrasonic Sensor?
https://m.balluff.com/local/us/produ...%5D%3DPV123383

Have not used their ultra sonic sensors but they make a fine laser distance sensor.
__________________
“Did the Lord say that machines outta take the place of livin’, and what’s the substitute for bread and beans? Do engines get rewarded for their steam?” -John Henry
  Reply With Quote
Old February 14th, 2018, 09:22 PM   #4
makr8100
Member
United States

makr8100 is offline
 
Join Date: Jan 2018
Location: USA
Posts: 14
We're trying to count pizza crusts go by on a conveyor. Near white crusts on a white conveyor with a bleach white UHMW track on the opposite edge. We've successfully used reflector-type sensors but the reflectors keep getting ripped out by production and/or sanitation.

We considered Keyence LV-N (have had success with them in other areas) but QA didn't like the idea of multiple wires in that location. We went with an LR-TB5000 (could have settled for a LR-TB2000 and saved a few bucks) which worked great for about a month until it too was damaged. Someone removed it (why? no clue...) and broke a pin off.
The powers that be like the LR-T but apparently don't want to be dropping $1000+ every time we have to replace one.
  Reply With Quote
Old February 14th, 2018, 09:48 PM   #5
PapaSmiff
Member
United States

PapaSmiff is offline
 
Join Date: Jun 2015
Location: Georgia
Posts: 52
You might want to look at Banner U-GAGE T30 series ultrasonic sensors. We've used them for tank level - decent and, I think, relatively cheap. Their one problem for us is they are not well sealed against washdown but we still use them here and there.
  Reply With Quote
Old February 14th, 2018, 09:55 PM   #6
seth350
Member
United States

seth350 is offline
 
seth350's Avatar
 
Join Date: Jul 2011
Location: Over yonder
Posts: 186
Aaaah, the dear sanitation crew.

Keyence:
https://www.keyence.com/products/sen...lr-z/index.jsp
Color or transparency doesn’t affect it. But probably not available in 2 meter range.
Also can purchase a stainless steel mount that will encase the entire sensor.
We use them on cranes in an anodizing line.
__________________
“Did the Lord say that machines outta take the place of livin’, and what’s the substitute for bread and beans? Do engines get rewarded for their steam?” -John Henry

Last edited by seth350; February 14th, 2018 at 09:57 PM.
  Reply With Quote
Old February 14th, 2018, 10:02 PM   #7
OkiePC
Lifetime Supporting Member
United States

OkiePC is offline
 
OkiePC's Avatar
 
Join Date: Mar 2005
Location: ENE of Nowhere Oklahoma
Posts: 9,737
Sometimes the mounting is more important than the choice of sensor...especially when hose monkeys...er I mean sanitation associates are involved.

Maybe you can recess a reflector in the UHMW side rail. And build a heavy duty stainless steel guard around the sensor.

What sort of response time is going to be required?
__________________
It's not all the variables I am most concerned with, it's the undiscovered constants.
  Reply With Quote
Old February 15th, 2018, 07:06 AM   #8
BlueAltezza
Member
United States

BlueAltezza is offline
 
Join Date: Nov 2012
Location: Cleveland, OH
Posts: 144
Banner Q4 series might help - you'll have to check the available models for distances. They can do a distance/contrast blend for detection and way more affordable compared to the Keyence equivalents.
  Reply With Quote
Old February 15th, 2018, 07:30 AM   #9
Christoff84
Lifetime Supporting Member + Moderator
Canada

Christoff84 is offline
 
Christoff84's Avatar
 
Join Date: Jun 2006
Location: Cambridge, ON
Posts: 370
Have you looked at IFM, cheaper then keyence, 5 year warranty and IP67 rated, can configure outputs based on distance the sensor sees.
https://www.ifm.com/products/us/ds/O1D100.htm
  Reply With Quote
Old February 15th, 2018, 09:44 PM   #10
makr8100
Member
United States

makr8100 is offline
 
Join Date: Jan 2018
Location: USA
Posts: 14
Thanks for the input everyone, probably going with ultrasonic. There's a Sick that looks pretty affordable.

https://www.sick.com/us/en/distance-...1102/p/p334364
  Reply With Quote
Old February 16th, 2018, 07:16 AM   #11
kolyur
Lifetime Supporting Member + Moderator
United States

kolyur is offline
 
kolyur's Avatar
 
Join Date: Oct 2004
Location: Wooster, Ohio
Posts: 1,389
+1 for the Banner Q4X. We've used a bunch of these and they work well. I like the SS housing. We had one DOA out of the box, distributor replaced it, otherwise no problems with reliability. The built-in display is nice for configuration. They're in the $200-ish range I think.

https://www.bannerengineering.com/us...eries.html#all
__________________
John
  Reply With Quote
Old February 16th, 2018, 12:14 PM   #12
alive15
Member
United States

alive15 is offline
 
Join Date: Oct 2015
Location: al
Posts: 136
Buy a used instead of brand new Keyence LR-tb2000c sensors for cheaper price, those work great and last a long while. Super-low maintenance and easy to program. You could probably buy one off e-bay for $300-400.

Automation direct has one for $350 that checks up to 10m called the OPT2014, check them out also.
  Reply With Quote
Old February 16th, 2018, 12:28 PM   #13
Gomez_
Lifetime Supporting Member
United States

Gomez_ is offline
 
Join Date: Sep 2014
Location: California
Posts: 165
Quote:
Originally Posted by Christoff84 View Post
Have you looked at IFM, cheaper then keyence, 5 year warranty and IP67 rated, can configure outputs based on distance the sensor sees.
https://www.ifm.com/products/us/ds/O1D100.htm
+1 for IFM, but I wouldn't use the O1D100, it's more expensive because it supports analog out. Id probably go with something like this:
https://www.ifm.com/ifmus/web/oidl3.htm
  Reply With Quote
Old February 16th, 2018, 12:31 PM   #14
dcam
Member
United States

dcam is offline
 
Join Date: Apr 2012
Location: livingston
Posts: 30
ifm effector has sensors that will do what you need and are decently priced, depending on the nature of the surface you are hitting ,laser would prob be best. dig out or 4-20. configurable
Attached Images
File Type: jpg o5d-feat.jpg (16.2 KB, 33 views)

Last edited by dcam; February 16th, 2018 at 12:36 PM.
  Reply With Quote
Old February 16th, 2018, 05:18 PM   #15
Dirt
Member
Sweden

Dirt is offline
 
Join Date: Apr 2008
Location: Stockholm
Posts: 160
Get a webcam and point it at the location of your nice and shiny Keyence.
  Reply With Quote
Reply
Jump to Live PLC Question and Answer Forum

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 02:15 PM.


.