Power Output Anomaly: Line (Vector) vs Engrave (Raster)
Explains the power output anomaly between Fill (Raster) and Line (Vector) layers on DC excited CO2 laser tubes, with test data from a Nova 35-80w.
This article is intended to discuss the power output anomaly between a Fill Layer vs a Line Layer for DC excited tubes.
The laser output power is set from the factory with a min power of 7pct and max power of 70pct. The reason for this is there is a minimum firing threshold and a milliamp (ma) power output limit based of the tube that is installed and the power supply that it is matched with. (this does not affect RF tubes with their power output settings are 1 to 99pct)
Testing was done on a Nova 35-80w with a 90w Reci W2 tube paired with a MYJG-100W LPSU. Controller firmware RDC V8.07.67.
Tube Specs
Laser Power Settings set at 7pct for min, 70pct for max (default)
(Same was tested in RdWorks, same result)
Test 1 — Line Layer (Vector)
DC PWM Signal from Ruida Controller to LPSU via CN5
3.492/5V = 70% power
Power Output from LPSU
(a bit over-ranged, after this test the max output was set to 65% and retested to 28ma @100% power)
Test 2 — Fill Layer (Engrave/Raster)
DC PWM Signal from Ruida Controller to LPSU via CN5
4.95/5V = 99% power (actual limit from Ruida that is possible)
Power Output from LPSU
LPSU was likely peaked on output and could not go higher than 33ma with the given tube, still higher than the 70% level which is supposed to be the max
It appears that the min and max powers are only used for Line type vector moves and not for raster type fill moves.
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