Lenze 8400 TopLine - Manual (Page 411)

Lenze · 8400 TopLine · Reference manual · DMS 6.0 EN · 06/2014 · TD05/TD14
411
7 I/O terminals
7.4 Touch probe detection
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7.4 Touch probe detection
"Touch probe" (TP) in general means quick detection of a position by a quick sensor if the pulse
duration of the sensor signal is too short to be detected by a "normal" digital input (scanning time:
1 ms).
Moreover, touch probe requires exact detection of the position. Here, the difference in position
between the 1 ms position detection and the touch probe signal is considered as correction value.
Applications:
• Precise approach of a position at a previously detected signal mark
• High-precision traversing of a section starting at a previously detected signal mark
• Safe detection of signal marks with very short signal edges
• Measurement of a high-precision position at a previously detected signal mark
• Homing to touch probe (homing signal)
• Relative residual path positioning (traversing of a section starting at signal mark)
• Absolute positioning to target position, activated by a safely detected signal mark
• Position measurement of a distance between 2 signal marks
Overview of touch probe signal sources
The 8400 TopLine provides the following signal sources for touch probe detection which can be
configured independently:
Signal source Edge sensitivity Applications
Digital input DI3
...
Digital input DI7
Rising edge, falling edge, rising and
falling edge (parameterisable)
Homing
Residual path positioning
Position measurement
Freely interconnectable
Z-track encoder
(from version 12.00.00)
Homing
Z-track resolver
(from version 12.00.00)
Homing