Synrad FH FLYER, Operator'S Manual

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tracking
SYNRAD FH Series Flyer Operator’s Manual Version 3.4
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Tracking hardware
The Tracking hardware section includes subsections:

Position encoder

Part sensor

DC power supply
Tracking with an FH Series Flyer marking head may require several additional components to coordinate
marking with part motion. These components include a part sensor (capacitive, inductive, optical, me-
chanical, etc.) for part position information, a position encoder (typically a rotary encoder with a bidirec-
tional or quadrature signal output) for determining line speed and direction, and a DC power supply to
power both the part sensor and encoder. Although the components described above are not provided with
your FH Flyer marking head, some or all of these components may already exist in the equipment that
performs your automated parts handling.
Note: In constant velocity (constant line speed) applications, FH Flyer marking heads can track moving
objects without an encoder using WinMark Pro’s Encoderless and Product Line Speed proper-
ties. When a part sensor is not feasible, such as in continuous web processes, use WinMark’s Inter-
nal Part Trigger and Part Pitch properties. Review the WinMark Pro tracking properties section for
details.
Position encoder
If the speed of your parts conveyor or web varies even slightly during the time that marking occurs, then
you must add a position encoder to your parts handling setup. Choose either a bidirectional (quadrature)
or unidirectional type. Unidirectional encoders send pulses to the Flyer head that synchronize marking as
line speed varies. Quadrature encoders are preferred as they also maintain synchronization if parts slow,
stop, or even reverse direction during the mark. Do not use an absolute position encoder. Table 5 -1 lists
electrical specifications for choosing a position encoder when connecting to Flyer’s high-speed inputs IN1
and IN2.
Table 5 -1 Position encoder specifications (for IN1/IN2)
Function Specifications
Code Incremental
Pulses Per Revolution User determined (see Encoder setup for sample calculations)
Input Voltage User determined (+15.0 VDC if powered from Flyer’s internal 15 V supply)
Output Signal Open collector (PNP or NPN) or open drain (P-channel or N-channel)
Low level output voltage: –0.6 V to +1.7 VDC (0 V typ.)
High level output voltage: +5.0 V to 24.0 VDC
On-state current: 6 mA typical; 9 mA maximum at 5 VDC
22 mA typical; 32 mA maximum at 12 VDC
32 mA typical; 47 mA maximum at 15 VDC
62 mA typical; 90 mA maximum at 24 VDC
Quadrature or bidirectional output recommended
(FH Flyer heads will accept a unidirectional encoder input)