Q&A

We have a fixed spindle, fixed ring type ring frame.
Will the Spindle Centering Device be of any use to us ?

The ring frame is fixed spindle, fixed ring type. That necessarily means that, no adjustments are possible, once the initial setting is done. However, does it mean that no adjustments are required? With the help of Spindle Centering Device, it is possible to monitor the gauging at intervals. Necessary steps may be taken at proper time.

One more thing. If you have a reliable means to ensure correct centering at the time of installation and commissioning of such ring frame, you will be definitely benefited, as you will get more accurate setting. Some mills have bought the Spindle Centering Device, only to facilitate precise erection of the ring frame.

After gauging the ring - spindle pair with Spindle Centering Device, if we put our conventional fiber bush for confirmation, it appears to be improperly gauged ?

Taking into consideration, the geometry of the ring frame, it is expected that the axis of the spindle should be perpendicular to the plane of the ring and the ring rail. Although this is the ideal   condition, nothing ideal ever exists in this brutal world. This will be apparent, if you see the level difference in the ring and bush, on all sides. The ring rail leveling may be incorrect, especially in the Y direction. We use height gauges and other means, which helps the setting in the X direction. But nothing is of help in Y direction, if ring rail is buckled or warped. Therefore, virtually the gauging appears to be Improper.

However, confirming accuracy of the Spindle Centering Device, with a fiber bush sounds something like looking for error in the venire caliper, using an ordinary foot scale!

Our fitters keep complaining that, gauging with electronic Spindle Centering Device, takes up a lot of time ?

When we initially start using Spindle Centering Device, since it is a new concept, a new way to work, it is quite understandable, that it will take more time. The device is very sensitive, as it has to stand to a good level or accuracy. But once he gets, proper judgment of the direction in which the spindle / ring has to be moved, to get the expected change in the meter reading; (i.e. to bring both axis to 0-0), he will be able to do the gauging quickly.

However, even if we assume that a little more time has to be spent, the accuracy that is achieved, will justify it. The reduction in the end breakages or increase in speed will definitely compensate for the time loss at gauging stage, if any.

An experiment carried out at VISHWABHARATI SPINNING MILLS, Vadamadurai, TN, clearly indicates this phenomenon.

Can we increase the speed of the ring frame, after gauging with electronic Spindle Centering Device?
Although it is at the sole discretion of the Spinning Manager, as to what speed, the ring frame should be run, we have observed that to take advantage of reduced end breakages; many times the spindle speed is, increased to the extent of 5 %.

We have installed the Ring Data Acquisition System in mill, is electronic Spindle Centering Device, useful to us ?

Yes, very much. By using the ring data information, the problematic spindle can be specifically attended using Spindle Centering Device, to eliminate any contribution due to disturbed gauging.