i would like to run my M-140 diode without any active cooling or TEC
what is the magic point where it can run for hours without damage?
i would like to run my M-140 diode without any active cooling or TEC
what is the magic point where it can run for hours without damage?
I suppose it all depends on the size and material of your diode mount
what do you intend to use?
"its called character briggs..."
... I'm using them with a big passive cooler and currents from 500 - 800mA without remarkable heating for laser-cutting ... It's mostly CW ON for some ten seconds, then OFF for some milliseconds (moving to next line start) with job-times of some ten minutes.
Testing with 1Amp for some minutes was OK too.
I'm running much stronger IR-diodes with highest of 80-90% of the max. ratings (max. 4.5Amps instead of 5A, or max. 8A for 9A) with only passive cooling ... not hitting the max. ratings and thus avoid (over-) heating can increase the lifetime to nearly infinite ;-)
Here the link to a wiki-page I've set up for laser-cutting hints: http://reprap.org/wiki/Laser_Cutter
Viktor
http://images.villageorigin.com/0064.../001.jpg?s=300 Dimensions: 16 x 50mm
its a big black one, with no need of pressing a diode in, which i like because i allready replaced one diode...
i have a glass aixiz lens made for 405-445nm with AR coating
and no driver (will try making one myself, trying to figure out now what to supply the diode)
it will be put in a laser scanner (cheap one with steppers) it does have one fan, but its at the far end of the box...
edit: i also have a 30mW green box (identical) and i dont want <1W as it would overpower the green one
Last edited by mrfloppy; 11-22-2012 at 02:59. Reason: extra info
I use my M140 diodes in Aixiz cylindrical mounts, clamped in Pat's mounts (not a whole load of contact area between barrel and mount), which is screwed to a baseplate.
No other cooling applied.
I run these at 1000mW output power in projectors that are 'on' all night (8+ hours) with no problems, and have done for 18 months +
Frikkin Lasers
http://www.frikkinlasers.co.uk
You are using Bonetti's defense against me, ah?
I thought it fitting, considering the rocky terrain.
casio run 24 diodes in a small ally heat sink with no tec cooling
Eat Sleep Lase Repeat
so i could probably run 500mA with ease as my casing is pretty big + a tiny bit of air going thrugh
now @ how much Volts?
... I'm driving all my diodes with LM317 or LM338 as current-regulators and max. 12 Volts - the effective voltage will follow the current adjusted by the LM's.
The current ranges for the different diodes go from 200mA for 405nm-bluray-diodes to 8Amps with the 25Watt-IR-diodes ...
Viktor
suppose you're thinkin' about a plate o' shrimp. Suddenly someone'll say, like, plate, or shrimp, or plate o' shrimp out of the blue, no explanation. No point in lookin' for one, either. It's all part of a cosmic unconciousness.