Operating instructions

OI: BK MIKRO LIN.B Monitoring Functions
Rev. 2.02 dated 31.05.2007 Page 19 of 30
4 Monitoring Functions
4.1 Teach mode = Monitoring with learn function
"Multi": One of the possible monitoring functions, requirement: P1=0, P2=0
"Single": Standard monitoring function
The scanning range will be determined by a learn 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 learn cycle
Active input signal on the "Teach" screw terminal of the control unit.
The scanning wand moves with the preset speed from the current position to the
mechanical backstop and then back in the opposite direction towards the object whose
position is to be "learned".
• 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 scanning wand moves to is end of stroke without touching a tool,
the "K.O." relay is activated.
After a fault event of this kind, the position isn't stored any more.
Following "Start" pulses will detect "K.O.".
The two LEDs for "O.K." and "K.O." will indicate the result.
Fig. 4-1: "Teach-in", the learn cycle
Captions:
v
max
= max. speed of scanner
v
S
= speed of scanner preset by "Scanning intensity" toggle switch
v
S(low)
< v
S(high)
< v
max
Note:
The position learned during the "Teach-in" cycle remains in memory after
system is switched off.
The tool geometry (position and dimension) during the "Teach-in" cycle must
correspond to that during a "Start" monitoring cycle.
v
max
Internal backstop
Stop position
Learn position
Object
v
S
v
S
approx. 1.5 mm