Operating instructions

OI: BK MIKRO 7 Mode of Operation

Rev. 2.01 dated 05.02.2007 Page 15 of 32

3 Mode of Operation

BK MIKRO 7 can be operated in different ways:

 Scanning in one direction

 Scanning in both directions

 Monitoring with learning function (Teach mode)

 Monitoring with setting scanning range (Switch mode)

 Monitoring as object monitoring or free space monitoring

All modes allow return travel monitoring.

3.1 Scanning process

Applying a pulse to "Start" or "Teach" terminal will trigger a scanning cycle. During scanning

operation, both relay outputs will be inactive (LED "O.K." and "K.O." not illuminated).

For the real scanning process, i.e. after a "Start" pulse, initially, the scanner will travel at

maximum speed to the start of a given monitoring range. However, its motor will slow down

to a preselected scanning speed in time before a learned position using teach mode or a

preselected angle set by rotary switch using switch mode is reached.

The monitoring range will then be traversed at the preset scanning speed and its related force

which is to be used to scan an object or range. During the entire operation, all pulses generated

by the scanner's internal encoder will be continuously processed.

If the system detects that the scanner no longer moves or has exceeded the end of the

monitoring range, the direction of rotation immediately changes, and the scanner will return

at maximum speed into its stop position.

Depending on the result of scanning the corresponding relay will be activated,

and the LED belonging to will indicate the result at the control unit.

"Start" cycle with CW travel

using teach mode using switch mode

Fig. 3-1: "Start" cycle for scanning in one direction

Monitoring range = Range of tolerance for "O.K." message

Vmax = max. speed of scanner

Vs = speed of scanner preset by "Scanning intensity" toggle switch

Stop Position

"learned" position

Object

Monitoring

range

Vmax

Wand

Vmax

Stop position

Wand

Monitoring

range