Wire traverse settings

Hi,

We have a wire drawing machine that draws to a size of 0.009 inch in brass and copper. Recently the motor and drive which is used for traverse, blew up. I have bought a new geared motor and new drive, but I am unable to run is as I am facing a problem at the end point/ direction change point. I believe that the reverse from one direction to another on the traverse is done at a higher speed compared to the normal traverse speed and also I am not sure if the traverse speed in the return direction is the same in both directions or there is a differential traverse speed, to prevent wire entanglement?

A bit complex to explain but I hope I conveyed my problem well.

Thanks for your input in advance.

Hello KAMKAT,

In my experience traversing forward and reverse is at the same speed. Likewise no change in spooling speed at the reversals unless of course the reversal point(s) has (have) been incorrectly set and the wind is not uniform near the flange(s). Perhaps others have experienced different settings.

Regards
Peter J. Stewart-Hay
Principal
Stewart-Hay Associates
www.Stewart-Hay.com
519 641-3212

The traversing speed is a function (v=f(1/d)) of the diameter of the spool (filling degree). That means that the traversing speed is higher when the spool is empty. Then it runs slower after every layer when the production speed of the wire is constant.

Best regards

Juan Carlos González Villar

Kabel.Consult.Ing
www.kabelconsulting.de

Hi Juan,

You are right of course. This function allows a constant traverse pitch to be set despite the fact that the reel rotational speed slows down as the wire layers build up.

Regards
Peter J. Stewart-Hay
Principal
Stewart-Hay Associates
www.Stewart-Hay.com
519 641-3212

Hello,

Like everyone has said, the speed should be the same in each direction of travel for the traverse guide pulley. Most spooling technology or concepts are the same regardless of the wire size or type. The only difference is that with the size wire you are drawing and the typical speed that this size wire may be drawn, results in the spool rotating at very high rpm. In some cases the traverse length may be 3-6 inches and the barrel of the spool only about 2 inches in diameter. Obviously at 5,000 feet per minute, the spool rpm would be quite high ( up to about 10,000 to start) Also with a 3-4 inch traverse length the traverse motor would be reversing about 400 times a minute and half this if drawing speed is only 2,500 fpm. This means that the reversing operation has to be nearly instantaneous. Expensive stepper motors work well. The problem that generally occurs is that you cannot begin the reversing operation after the traverse has traveled approximately the width of the spool because it take the wire longer to reverse direction than it take the motor to reverse direction. So unless you have an optically controlled traverse your total traverse travel may be only 3.75 inches or less when the spool traverse length is 4 inches. This prevents excessive build up at the flanges. For a manual control you have to just experiment and keep you eye on it. The optically controlled traverses see the build up and compensate by automatically adjusting the traverse length until the excessive build up has leveled off.

richard

There are only a few software engineers in the world who are really prepared to realise a very good traverse. Here one of them

www.hambamer.de/index.html


Best regards

Juan Carlos González

Kabel.Consult.Ing
www.kabelconsulting.de