Dalsa X64 Xcelera-HS PX8, Руководство пользователя

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X64 Xcelera-HS PX8 Reference X64 Xcelera-HS PX8 User's Manual
See
“ Connecting External Signals to the X64 Xcelera-HS PX8 on page 70 for shaft encoder input
connector details.
CVI/CCF File Parameters Used
•
External Line Trigger Source = prm value
• External Line Trigger Enable = true/false
• Shaft Encoder Source = X, where:
•
If X = 0, Shaft Encoder selection is done automatically by the driver. In this case,
the opto-coupled input circuit is selected.
•
If X = 1, opto-coupled Shaft Encoder
•
If X = 2, RS-422 Shaft Encoder
• Shaft Encoder Enable = true/false
Shaft Encoder Interface & Timing
Dual Balanced Shaft Encoder Inputs:

Phase A
• Connector J1: Pin 2 (Phase A +) & Pin 10 (Phase A -)
•
Connector J4: Pin 23 (Phase A +) & Pin 24 (Phase A -)

Phase B
•
Connector J1: Pin 3 (Phase B+) & Pin 11 (Phase B-)
•
Connector J4: Pin 25 (Phase B +) & Pin 26 (Phase B -)

For complete information on J1 see " J1: CMD15 Male External Signals Connector ” on page 70 .

For complete information on J4 see " J4: External Signals Connector ” on page 72 and " External
Signals Cabling Options for J4 ” on page 77
CVI/CCF File Parameters Used
Shaft Encoder Enable = X, where:
•
If X = 1, Shaft Encoder is enabled
•
If X = 0, Shaft Encoder is disabled
Shaft Encoder Pulse Drop = X, where:
•
X = number of trigger pulses ignored between valid triggers
Web inspection systems with variable web speeds typically provide one or two synchronization
signals from a web mounted encoder to coordinate trigger signals. These trigger signals are used
by the acquisition line scan camera. The X64 Xcelera-HS PX8 supports single or dual phase shaft
encoder signals. Dual encoder signals are typically 90 degrees out of phase relative to each other
and provide greater web motion resolution.
Example using any Encoder Input with Pulse-drop Counter
When enabled, the camera is triggered and acquires one scan line for each shaft encoder pulse
edge. To optimize the web application, a second Sapera parameter defines the number of triggers
to skip between valid acquisition triggers. The figure below depicts a system where a valid camera
trigger is any pulse edge from either shaft encoder signal. After a trigger the two following triggers
are ignored (as defined by the Sapera pulse drop parameter).