THORLABS Vytran GPX3400 User Manual page 42

GPX3400 and GPX3600 Glass Processors
If using the GPX3400 glass processor then you must select the 3300/3400 radio button. Doing so tells
GUI software that it must issue lens home commands prior to the start of a taper or splice. This is
essential for a GPX3400 system to avoid heat damage to the lens.
If using the GPX3400 glass processor, decide if the filament should lift and lower during a splice or taper.
If the GPX3400 is fitted with a "T" (Tube) type filament then the furnace Up/Down should be set to
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the off position.
If the GPX3400 is fitted with a "V" (open) type filament then there should be space for the fiber to
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pass through the filament opening and as such Furnace Up/Down should be set to the on position
for easier fiber loading.
If furnace Up/Down is set in the off position, then the user must ensure that filament is in
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processing position before the splice or taper is started. With furnace Up/Down in the off position,
the filament will neither move to nor away from the processing position.
If the glass processor is fitted with an Iridium filament then "Ramp Enable" should be set in the off
position.
If the glass processor system is fitted with a Graphite filament then "Ramp Enable" must be set in the on
position to prevent damage to the graphite filament loop.
When Ramp Enable is set in the on position, both the splice and the taper process step the
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filament power up from 0 to a hold power.
Ramp parameters are fully active in splice process, but, typically not modified.
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The hold power is a set percentage of the splice power. Typically 80%.
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The filament is held at hold power for a set time (Hold Delay) then stepped to the full process.
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Typically 1 second.
Specify the Ramp UP duration, time for the filament power to increase from 0 to the hold power.
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Typically 3.2 seconds.
Specify the Ramp Down duration, time for the filament power to decrease from splice power to 0.
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Typically 1.0 seconds.
Specify the Increment in which filament is increased from the hold power to full power. Typically
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5.0 W.
Rev B, July 24, 2017
Chapter 5: Operation
Page 41