Description
Leuze electronic GmbH + Co. KG
BPS 37
8
3
Description
For information on technical data and characteristics, refer to Chapter 4.
3.1
Device construction of the BPS 37
Figure 3.1: Device construction of the BPS 37
3.2
Application
Wherever systems are moved automatically, it is necessary to uniquely determine their respective posi
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tions. This is achieved using various measurement procedures. In addition to mechanical measurement
sensors, optical methods are particularly well suited for determining positions as they operate without
mechanical wear and slippage.
Unlike other optical measurement methods, the bar code positioning system is not restricted to linear
movements. It can also be used flexibly in curved systems. Anywhere the long-wearing bar code tape can
be attached, it is possible to use the BPS to determine the position to within a millimeter.
Guide tolerances of the system play no roll as the permitted distance range between tape and BPS allows
for large deviations in distance.
3.3
Function
The BPS uses visible red laser light to determine its position relative to the bar code tape. This essentially
takes place in three steps:
1. Reading a code on the bar code tape
2. Determining the position of the read code in the scanning area of the laser beam
3. Calculating the position to within a millimeter using the code information and code position
The position value is then passed on via the standardized SSI interface (synchronous serial interface) to
the drive system of the vehicle for which the position is to be determined.
3.4
Advantages
• Easy mounting and commissioning
• Teach function for the "zero point", i.e. it is not necessary to exactly affix the bar code tape.
• Data output via SSI interface; BPS can be connected instead of a conventional rotary encoder.
• The function of the BPS makes it possible to attach the bar code tape only at those locations where
it is necessary that the position be known exactly.
• Positioning of non-linear movements as well
• No referencing necessary following a voltage drop
• Thanks to the large scanning depth, it is possible to compensate for mechanical tolerances.
• It is possible to exactly determine positions from distances of 10000 meters
Laser-beam exit
window
4x M3 mounting threads on the
rear of the device
15-pin sub-D con
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nector on the bot
-
tom of the device
Dovetail
fastening grooves
