
OPERATION MODES
PAGE
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53
The prior figures show the p250 laser delivering near peak output power. At a 10% duty cycle (at 1 kHz),
the rise and fall time of the p250 limits depth of modulation to approximately 85% of peak power. At
20% duty cycle (at 1 kHz), p250 laser delivers peak output power at full depth of modulation.
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), P250’s on-board tickle generator
sends a tickle pulse to maintain plasma ionization in the tube. Because the on-board tickle generator
cannot anticipate when the next PWM Command pulse will arrive; the tickle pulse (which typically lasts
for 2–6
μ
s depending on the laser) can effectively merge with a PWM signal that follows closely
afterwards. When the PWM pulse that follows is short, causing the tickle pulse to become a significant
fraction of the PWM pulse duration, then the tickle pulse effectively 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 affect mark quality.
While this situation can occur when using PWM Command signal frequencies of 5 kHz and less, it is
important to note that it isn’t the Command signal frequency itself that is the determining factor but
rather this behavior happens only when the off time between PWM pulses exceeds 200 microseconds.
Содержание p250
Страница 1: ...ENGINEERED BY SYNRAD p250 Laser User Manual...
Страница 13: ...CONTENTS DESCRIPTION CONTINUED PAGE 13 Contents Description continued Figure 1 1 p250 ship kit contents...
Страница 15: ...NOMENCLATURE CONTINUED PAGE 15 Nomenclature Continued Figure 1 2 Anatomy of a model number...
Страница 21: ...ADDITIONAL LASER SAFETY INFORMATION PAGE 21 P250 label locations Figure 2 1 P250 hazard label locations...
Страница 27: ...EUROPEAN UNION EU REQUIREMENTS ROHS COMPLIANCE PAGE 27 Figure 2 3 p250 Declaration Document...
Страница 40: ...RF POWER SUPPLY PAGE 40 Table 4 3 Dew point temperatures Continued...
Страница 63: ...INPUT OUTPUT SIGNALS PAGE 63 Table 4 4 User I O pin descriptions Continued...
Страница 83: ...P250 GENERAL SPECIFICATIONS PAGE 83 p250 General Specifications Table 4 5 p250 general specifications...
Страница 84: ...P250 GENERAL SPECIFICATIONS PAGE 84 Table 4 5 p250 general specifications Continued...
Страница 86: ...P250 OUTLINE MOUNTING DRAWINGS PAGE 86 Figure 4 46 p250 outline mounting dimensions mounting feet removed...
Страница 87: ...P250 OUTLINE MOUNTING DRAWINGS PAGE 87 Figure 4 47 p250 packaging instructions...
Страница 93: ...OPERATIONAL FLOWCHART PAGE 93 Operational flowchart Figure 5 1 p250 operational flowchart...
Страница 94: ...STATUS LED S PAGE 94 Status LED s Table 5 2 p250 Input Output LED Status Signals...
Страница 105: ...INDEX PAGE 1 This page is intentionally left blank...