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Synrad Firestar f series User Manual

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technical reference
310
Synrad Firestar f-Series operator’s manual
Controlling laser power
Marking/engraving operation
When the delay between the end of one PWM Command signal pulse and the beginning of the next
PWM pulse exceeds 200 microseconds (less than or equal to 5 kHz), Firestar’s on-board tickle generator
sends a tickle pulse to maintain plasma ionization in the tube. Because the on-board tickle generator can
not anticipate when the next PWM Command pulse will arrive; the tickle pulse (which typically lasts for
2–6 µs depending on the laser) can eectively merge with a PWM signal that follows closely afterwards.
When the PWM pulse that follows is short, causing the tickle pulse to become a signicant fraction of the
PWM pulse duration, then the tickle pulse eectively substantially increases the length of the PWM pulse
it has merged with. For subtle marking applications on sensitive, low threshold materials this lengthened
PWM pulse may aect mark quality.
While this situation can occur when using PWM Command signal frequencies of 5 kHz and less, it is im-
portant to note that it isn’t the Command signal frequency itself that is the determining factor but rather
this behavior happens only when the o time between PWM pulses exceeds 200 microseconds.

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Synrad Firestar f series Specifications

General IconGeneral
BrandSynrad
ModelFirestar f series
CategoryMeasuring Instruments
LanguageEnglish

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