Operating instructions

BK MIKRO 7 with scanner TK7A – Scanning in one direction OI: BK MIKRO 7
Page 18 of 32 Rev. 2.01 dated 05.02.2007
4.1 Teach mode = monitoring with learning function
Requirement: Rotary switches P1=0 and P2=0
The scanning range will be determined by a learning cycle (external control signal).
This mode of operation is the typical mode for tool detection applications:
The system will check for the presence of the tool at the learned position
4.1.1 "Teach-in", the learning cycle
The scanner will travel in its preset direction of rotation with its preset speed.
 If a tool is detected, its position will be stored,
and the scanner returns to its stop position with maximum speed.
In addition, the "O.K." relay will be activated.
 If the scanner rotates to a maximum of 270° without detecting any tool,
the "K.O." relay will be activated.
Following "Start" pulses will detect "K.O.".
Learning cycle with CCW travel
The figure shows a learning cycle with setting:
Switch "L" and S1=0, S2=0, i.e. CCW travel of the scanner.
v
max
= max. speed of scanner
v
S
= speed of scanner preset by
"Scanning intensity" toggle switch
Fig. 4-2: "Teach-in" for scanning in one direction
Note:
A position learned during "Teach-in" will remain stored, even after removal
of power to the unit.
No changes after "Teach-in" and before "Start" mode, concerning:
• Tool geometry (layout and dimensions)
• S1/S2 selection inputs
• "CW/CCW" toggle switch
4.1.2 "Start", the real scanning process
The scanner will travel to the previously "learned" position of the object to check for its presence.
 If the tool is within the monitoring range, the "O.K." relay will be activated.
 If the tool is not detected, i.e. either it is missing or there is an obstacle within the scanner
rotating area, the "K.O." relay will be activated.
Stop position
"learned" position
Object
Vs
Vmax
Wand