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PostPosted: Wed Oct 15, 2008 12:49 pm 

Joined: Sat Oct 22, 2005 10:17 am
Posts: 431
Location: Europe
i neeed an opinion about measure the diameter (or ray) of reel of paper in movement in machine paper.
diameter max is 2.5 meter

i test ultrasonics sensor (4...20mA) but is not good because
- the measure is of precision to the millimeter
- and gramagem of paper and rotation speed is not constant

regards


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PostPosted: Wed Oct 15, 2008 1:51 pm 
Site Admin

Joined: Thu Feb 16, 2006 6:25 pm
Posts: 3360
Location: Russia
See Laser Measurement Sensors (Laser triangular sensors)

for example
http://www.ia.omron.com/product/family/ ... x_fea.html

R=D/2=1250 mm
Image


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PostPosted: Wed Oct 15, 2008 3:27 pm 

Joined: Sat Oct 22, 2005 10:17 am
Posts: 431
Location: Europe
ok CoMod
thanks for the reply
seems to be a good idea, I go to study (price :oops: ) and I will test as soon as will be possible

many thanks again

most


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PostPosted: Wed Oct 15, 2008 4:05 pm 
Site Admin

Joined: Thu Feb 16, 2006 6:25 pm
Posts: 3360
Location: Russia
Don't use IFM Laser Optical distance sensor 01D100 - is very bad false analog output, but true LED display.
http://www.ifmefector.com/ifmus/web/pad ... 20_10.html


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PostPosted: Wed Oct 15, 2008 7:22 pm 

Joined: Wed Oct 31, 2007 4:47 pm
Posts: 30
Location: Europe
I use a lazer photocell of Leuze electronic model ODSL 30.
It has resolution 0.1mm, all metal
I installed it 3 years ago (works 24h/ per day) inside a RollingMill and it is still working perfect. :D

http://www.leuze.com/products/los/mess01_en.html
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PostPosted: Sat Nov 08, 2008 6:48 pm 

Joined: Fri May 02, 2008 7:41 am
Posts: 38
Location: Mexico
you can use a roller agaist the roll of paper with a spring pushing the roller to the roll of paper and use a sensor to detect de position of the roller. i hope i explained my self.


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