Torque reached, angle reached.
But is the screw head actually in contact with the
workpiece?

Only GAP Control gives a clear answer !

Sources of errors in screwdriving
processes

• Fin on the thread of the screw or workpiece
  
• Dimension or manufacturing tolerances of
  threads
• Tolerances in workpiece height
  
• Different thread friction

Self-tapping screws in cast metal are a good example
for a possible accumulation of error sources.
They cannot be adequately controlled with indirect
measuring methods such as torque and angle.

The various sources of error require a suitable
tolerance window when setting, for example, the pre
torque or the final angle.

The GAP Control process eliminates these tolerances.

Function

In addition to standard torque/angle assessment, the new
GAP Control screwdriving process detects the height
of the screw head and individually calculates the
screwdriving depth in relation to the workpiece level.

Calculating the head contact

The new dimension in assessing screwed assembly!

• In combination with a torque-angle controlled
  screwdriving process, the error rate is minimized.
• Measuring the height of the workpiece eliminates
  the last source of error.

Your advantage

Documented reliability is achieved by directly measuring
the screw head’s contact to the workpiece.

In combination with a torque-angle controlled screwdriving
process, the error rate is almost zero!!