[?]: how measure 2.5 meter diameter of paper ?

most · Post by **most** » Wed Oct 15, 2008 9:49 am

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

Post by **CoMod** » Wed Oct 15, 2008 10:51 am

See Laser Measurement Sensors (Laser triangular sensors)

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

R=D/2=1250 mm

most · Post by **most** » Wed Oct 15, 2008 12:27 pm

ok CoMod
thanks for the reply
seems to be a good idea, I go to study (price

) and I will test as soon as will be possible

many thanks again

most

Post by **CoMod** » Wed Oct 15, 2008 1:05 pm

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

paskalare · Post by **paskalare** » Wed Oct 15, 2008 4:22 pm

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.

http://www.leuze.com/products/los/mess01_en.html

enrique_gf · Post by **enrique_gf** » Sat Nov 08, 2008 3:48 pm

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.