Operating Manual CMGZ 622
17
8.5
Mounting the distance sensor
If the control loop is operated with pilot control (processing of reel diameter), the
actual reel diameter has to be transmitted to the electronic unit. For this purpose the
actual reel diameter is detected with a distance sensor and the distance signal is fed to
the analogue diameter input. It has to be ensured that the measuring axis of the
distance sensor is straight radial to the reel (refer to fig. 1 and 10).
Optical distance sensor CMGZ581934
FMS recommends to use the optical distance sensor CMGZ581934 because its
accuracy and signal output is adapted to the FMS Tension Measuring Amplifiers and
Tension Controllers.
fig. 10: Mounting of the distance sensor CMGZ581924
E411012e
The distance sensor operates with the 3-beam-correction principle. It is considerable
insensible to secondary light and changes of the surface colour of the detected object.
But while mounting it must be ensured that the sensor is mounted in „horizontal“
position (fig. 12). The output signal is proportional to the reel radius: Small radius =
small signal; large radius = large signal.
Technical data distance sensor CMGZ581934
Type
HT77MGV80, Infrared light 880nm
Measuring range
1000mm [40“]
Ø Measuring distance
800mm [32“]
Min. measuring distance
300mm [12“]
Max. measuring distance
1300mm [51“]
Resolution
0.2...30mm [.008...1.2“] depending on width of spot
Reaction time
10ms
Linearity 2%
Temperature drift
0.5mm / K [.01“ / °F]
Supply voltage
18...30VDC / 70mA
Temperature range
–10...+60°C [14...140°F]
Protection class
IP67
