Created Date: November 06,2008

Created by: milldrone

laurent,

First let me say that I have not done this.

Here are some threads on winders

http://www.plctalk.net/qanda/showthread.php?t=35399&highlight=winder

http://www.plctalk.net/qanda/showthread.php?t=27448&highlight=winder

http://www.plctalk.net/qanda/showthread.php?t=23213&highlight=winder

http://www.plctalk.net/qanda/showthread.php?t=13660&highlight=winder

http://www.plctalk.net/qanda/showthread.php?t=3721&highlight=winder

http://forum.automationdirect.com/showthread.php?t=3573&highlight=winder

Edit: one more web page http://www.apicsllc.com/apics/Ie_ias03/IAS4p5s.html

If nothing else my reply will keep your thread active for another day!

Created Date: November 08,2008

Created by: shoupdaddy

I haven't done a winder project yet, but I have done several web process for loop control and I used an Ultrasonic Analog sensor for feedback. I actually converted my analog signal (input card) to digital (from a CTRIO) and ran stepper drives. Maybe you could have an ultrasonic sense your roll dia. to keep tension/speed accurate with your dancer as your trim? Just make sure you used the correct ultrasonic if you try this however.

Created Date: November 17,2008

Created by: Rday

I have done this with a five motor system.

One motor needs to be the lead the others need to be followers. Supply the follower motors a speed reference from the lead. Use your dance arm to bias the speeds of the others. In my application I used a light curtain that provided a +-10 vdc as the bias. One motor was the lead and set the speed for the line. The others followed this motor and used the light curtains to bias their speed. If the loops were in the middle no bias voltage was supplied. As the loop dropped the follower motor would speed up. As the loop got higher the follower motor would slow down. I can provide the code if you like it is around 60 rungs.