The Tube & Pipe Journal - September 2010

considered essentials on modern CNC
tube benders. Furthermore, another layer
of protection can be employed to prevent
collisions. For example, low-air-pressure
Figure 3

The sofware on a CNC tube bender needs to detect and prevent potential collisions among the various bender components.

switches can be used to prevent a machine from operating if the line pressure drops too much. This, in turn, can prevent unexpected machine motions, thereby preventing a potential injury. The same is true for the motion of certain dynamic devices found on a tube bender. For example, it should be the job of the software to ensure that the servo-controlled carriage (see Figure 3) does not run into the back end of the pressure die.

Likewise, the software should ensure that the pressure die does not try to wipe out the carriage. In short, it is the job of the software to prevent a motion that would lead to a collision.

MAINTENANCE

All machine tools need preventive maintenance to extend the life of the machine. A good software package will alert an operator as to what needs inspection over the life

TECH TALK

of the machine. Adhering to proper inspection and maintenance procedures means that maintenance personnel must have access to all areas of the machine, and this is when an electrically interlocked guarding system can come into play. Such a system includes electrical boxes; the interlock prevents personnel from making contact with high voltage. Furthermore, safeguards such as a padlock and lockout tags always should be used when maintenance is required inside an electrical enclosure. In addition, touchproof devices, which commonly are found inside electrical boxes, can help to ensure personnel do not come in contact with high voltage.

George Winton, P.E., is the founder and president of Winton Machine Co., 3644 Burnette Road, Suwanee, GA 30024, 888-321-1499, gwinton@wintonmachine. com, www.wintonmachine.com.

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