Putting the brakes on machine overrun dangers
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Rockwell Automation - Allen-Bradley Guardmaster product story
Edited by the Engineeringtalk editorial team
Dec 23, 2003
The Nelsa Torklok DC injection braking system provides operator safeguarding on machines, which in critical situations would otherwise not stop quickly enough to prevent serious injury.
Nelsa's Torklok, DC injection braking system, provides operator safeguarding on machines, which in critical situations would otherwise not stop quickly enough to prevent serious injury.
The Torklok braking unit is designed for machinery such as radial and multispindle drills, horizontal borers and lathes, which is difficult to guard conventionally.
In these cases the only way to ensure sufficient operator protection is to provide a way of stopping the machine quickly if the operator gets into difficulties.
The dc injection braking provided by Torklok is the best and most reliable way of achieving this, the system providing a typical stopping time within one second when fitted to a radial drill.
Theoretically it is possible to stop a machine instantly, but this would cause a massive mechanical stress on any transmission, which would almost certainly be sheared or stripped.
Therefore, any injection braking system must be suited to the momentum and torque of the machine that it is controlling.
The design of Nelsa's Torklok system takes these and many other aspects into consideration, resulting in a comprehensive range of units in which all variable factors have been optimised to give the best possible emergency braking performance coupled with maximum reliability.
The scope of the Torklok range means that for most machines Nelsa will be able to provide "off the shelf" units ideally suited to the task.
However, for machines not covered by the standard Torklok range, Nelsa undertakes to produce units to meet specific requirements, including those of multi-spindle machines.
As part of EJA, a member of the Rockwell Group and a leader in machinery safety, Nelsa is uniquely placed to ally its Torklok braking units and wide range of standard and special guarding systems with the many interlocking devices available from the EJA range.
A typical solution could include perimeter fencing, safety mats, light curtains, trapped key systems, interlocking devices and safety relays; all provided from a single source and backed up the technical resources of one the leading companies in machinery safety.
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