Synrad FH FLYER - Calculating Heat Load

appendix a
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SYNRAD FH Series Flyer Operator’s Manual Version 3.4
Cooling
Calculating heat load
The purpose of calculating Flyer’s internal heat load is to determine if a specic marking application
requires auxiliary cooling. The goal is to prevent the temperature of Flyer’s XY optical scanners from rising
above 50 °C.
The equation used for this Heat Load calculation is:
T
INT
= T
AMB
+ 14 °C + (T
GRAPH
× DC
MARK
)
where: T
INT
= Internal optical scanner temperature (in °C)
T
AMB
= Ambient temperature (in °C)
T
GRAPH
= Temperature rise due to mark parameters (in °C)
DC
MARK
= Duty cycle of mark (Cycle time/time between successive ‘start mark’ inputs)
Note: This equation assumes “worst-case” conditions for mark object type (text), o-vector speed
(maximum), and airow (none) in order to approximate the maximum temperature rise sustained
by Flyer’s optical scanners.
To calculate Flyer’s maximum internal temperature for a specic marking application, perform the steps
listed in the following sections:
Calculate the T
GRAPH
Temperature Rise
1 Determine the focusing lens used in this marking application.
Example – your application uses a 125 mm focusing lens, so enter a Lens Size of 125 mm.
Lens Size equals ______ mm.
2 From your mark le, determine the smallest dimension (in either the X- or Y-axis) of the object you
are marking.
Example – your mark object, as shown in WinMark Pro’s Object Transformations dialog, has a New
Width dimension of 0.476" and a New Height dimension of 0.080". The Minimum Dimension X or Y
is 0.08 inches.
Minimum Dimension X or Y equals ______ inches.
3 With the Minimum Dimension obtained in Step 2, use Table A-1 to locate the appropriate tempera-
ture curve (A, B, C, or D). To do this, nd your lens in the Lens Size column and follow across to the
column containing the Minimum Dimension from Step 2.