I have a Eleskmaker A3, with a 2,5W Laser.
I decided to upgrade the laser module, and after some search, ordered a 15W one from banggood. (Image bellow)
Advertised as 15W pulsed, 8W average.
I wanted something more powerfull than 2,5W. The advertised 15W of this laser, are out of the question for sure, but expect to have 6W, 7W maybe 8W continuous power!!
One of the questions raised by some users is that these lasers diodes are over-powered and that could reduce considerable their life time. Makes sense.
Some questions arise:
If the 15W are pulsed (for very short time moments), who controls the max power applied to the diode? Should I take care reducing the PWM rate accordingly? Or the Laser driver takes care of this control?
Trying to understand this question, did some measurements with an osciloscope on the Eleksmaker 2,5W Laser and on this new one 15W Laser. (see pictures below)
Green Line: PWM (S) input
Red(Pink?) Line: Signal applied directly to the Led.
Photo of the new 15W Laser:
Eleksmaker 2,5W 25% duty-cycle:
Eleksmaker 2,5W 50% duty-cycle:
Eleksmaker 2,5W 75% duty-cycle:
Now the 15W Laser Module
15W Laser 0% duty-cycle:
15W Laser 50% duty-cycle:
15W Laser 75% duty-cycle:
- The signal wave applyed by the both modules is similar
- In 0% duty-cycle, the 15W applies a constant 3,0V for the Diode. A very small dot/small power is always present.
- The Eleksmaker 2,5W applies a voltage(5,28V) higher than the 15W one (4,64V)!!! ( I would expect the reverse!!)
- The power of the 15W Laser is noticeable higher, acording to the jobs done. How much? I cannot say!
Please provide your comments.