Operating instructions

04/08 Application manual Positioning 45
4.4.1.3 Motion mode "touch probe" (sensor)
Activation of motion mode "touch probe":
−
Parameter
Motion Mode 1208 = "2 – touch probe: rising edge" or
− Parameter
Motion Mode 1208 = "3 – touch probe: falling edge"
The rising or falling edge of a digital signal on digital input S3IND (terminal 210A.5)
is used for setting a reference point for a relative positioning operation. As soon as
the signal is received, the drive moves by the relative distance of parameter
Target
Position/Distance
1202. The function is permanently linked to digital input S3IND,
parameterization on another digital input is not possible. The touch probe signal
must be connected to this input when a touch probe motion mode is selected.
The function can be used in order to position the front edge of workpieces of a dif-
ferent length at the same place, for example. A momentary contact switch can sup-
ply the touch-probe signal.
The current position is set as the reference position when the rising edge (operation
mode 2) or the falling edge (operation mode ) is received on the digital input (touch
probe signal).
The touch probe position is the position at which a rising/falling edge is received on
digital input S3IND plus the value of parameter
Target Position/Distance 1202.
Note: By default, digital input S3IND is assigned the function "Stop Position-
ing". Change the occupation of parameter
Stop Positioning 1223 and,
if necessary, change wiring if touch probe function is used.
Motion Mode 1208 =
Target Position / Distance 1202
2 - Touch-Probe: Risin
g
Ed
g
e
or
3 - Touch-Probe: Falling Edge
Movement of the relative distance from
parameter ,
starting from receiving the Touch Probe Signal
Target Position / Distance 1202
Direction of
movement
Touch Probe
Digital input S3IND (X210A.5)
If the value of parameter Target Position/Distance 1202 is too low in order to stop
at the target position at the deceleration entered in the motion block, the target
position is passed, the direction is reversed and the position is approached from the
opposite side.
In parameter Touch-Probe-Window 1209, you can enter the range in which the
touch probe signal must be received. The starting point of the touch probe window
is the last target position or the current position in JOG mode.
The end point of the touch probe window is in the direction of the motion.
If 0 is entered in parameter
Touch-Probe-Window 1209, the touch probe window is
deactivated.
Parameter Setting
No. Description Min. Max. Fact. sett.
1209 Touch-Probe-Window 0 u 2
31
-1 u 65 536
Application manual Positioning 4504/08