05/31/2006 • Metrology

CoMo – For 100% Quality during Manufacturing, Assembly and Testing

Measuring force or torque as a function of time, displacement or angle is an ideal method of monitoring, controlling and documenting assembly and testing processes. Kistler con-trol monitors – or CoMo for short – can be used to display, evaluate and document the resulting curves.

In addition to protecting machines and tools, the objective of force and torque measure-ment in process monitoring is the separation of flawless (OK) from flawed (NOK – not OK) parts. The determination of the evaluation criteria is based on the measurement curves of OK and NOK parts. During this process, the evaluation criteria must be set to reliably identify NOK parts while tolerating the standard deviation for OK parts.

For process monitoring, the system allows the combination of up to twelve evaluation functions such as boxes, thresholds, limit position, gradient dy/dt or dx/dt, integral and hysteresis. The system can display for each evaluation element the intersection point of the curve with the element as a trend or statistics. This is done by means of a histogram, which shows the data in the form of mean value, standard deviation, cp or cpk value. CoMo’s also allow the display and storage of the corresponding process values in nu-merical form. A control signal for the result of the process evaluation (OK/NOK) is actu-ated and transmitted to the interfaces such as digital outputs, profibus DP or Ethernet.

Kistler offers a range of CoMo's to meet the different requirements of these measuring and documentation tasks:
  • CoMo Logic® Type 5875A... Single-channel force-time monitoring in real time
  • CoMo Net® Type 5863A1... Two-channel force-displacement or force-time visualization with integrated web server
  • CoMo View® Type 5863A2... Two-channel force-displacement or force-time visualization with integrated web server and touch display
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Kistler Instrumente GmbH

Daimlerstr. 6
73760 Ostfildern

Phone: 0711/3407-0
Fax: 0711/3407-159