Replacing damaged LD with NUBM08 laser diode | TECH R&D
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- čas přidán 4. 02. 2021
- In this video i showed instead of buying a ned module for damaged laser we can simply change the laser and here i used NUBM08 laser diode which 4.75w optical power and pulsed power is around 7w.
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nice video.what kind of microcircuit on the driver. 5 legs. marking
Am sorry but the part no. Had been erased from the seller side
HI...
Can u tell me the dimensions of your:
*copper module(or copper housing)*
And of diode after taking the original lens out.
Actually, I was trying to make a custom Copper housing hence need to know the dia of holes
I don't remember the outer diameter of copper housing but yes my diode(NUBM08) is 9mm for diode you can get the details from its datasheet.
I would recommend to buy the copper housing instead of making, for extended heatsink you can drill on stock cpu heatsink.
hi........... the brass casing is just for fitting focusing module. Right???
Also why we can't use the ordinary tin pin lens..provided with NICHIA NUBM08?
brass casing is not just for focusing lens but also for the diode so that the brass will act as a heat heat sink for the diode.
And for tin case lens that comes along with the laser here the problem is you can't use those lens assembly in this module and one more thing you'll get a fixed focus and main thing is you need to build a seperate big size heat sink for that lens with laser diode to properly dissipate the heat.
@@TECHResearchDevelopment about the heat separate sink...i actually want to run the laser for not more than 40-50sec. with an interval of maybe 2-3min..will a smaller heat sink like this will work?(diode is same as yours)
ae01.alicdn.com/kf/HTB1vQjrKVXXXXbRXVXXq6xXFXXXH/202467672/HTB1vQjrKVXXXXbRXVXXq6xXFXXXH.jpg
I think you can't use this silver heatsink as it's diameter is for TO-18 i.e. 5.6mm laser diode whereas nubm08 is 9mm due to which the brass heat sink size increases and hence the brass will not fit with this silver heatsink so if you want to reduce the cost of heat sink other than the brass one I would recommend you to go for stock cpu heatsink by drilling hole according to brass one
@@TECHResearchDevelopment oh..ok got it....
actually, i am more concerned about heat dissipation...like *let say i have a heat sink of a certain dia, which fits your brass casing perfectly.... but, the thickness of that heat sink is same as that of the one shown in the above link...
in that case can i use your Blue LD, for 50sec with an interval of around 2-3mins maybe, without blowing up the diode due to thermal failure?
Yes you can use at that duration, also add 12v fan it's not necessary for this duration of usage (50sec on and 2-3min off) but still for more safety.
Dear, I have a 450nm 40w laser its diode broke and I have to replace can you tell me which type of diode I have to purchase, and from where?.
Well am not sure, because some laser vendor specify the lasers as 40w but it's actual optical power is max 7-9w (sometimes even less) and in some cases it's dual laser diode package in one single module and that too it's optical power will mostly be arround 15w. But you buy nubm44 as its power rating (optical power) is more than nubm08.
i removed the gball lens from nubm08...and attached the g8 lens.....
The laser seems to converge at around 8cm......but like after 8 cm it diverges like hell..making a rectangle of around 2x1 foot.
any idea why?
Then it may be your focal point is at 8cm need to get all in one capsule mine was adjustable lens with which I was able achieve around 2.5cm focus
@@TECHResearchDevelopment
Like i want...a not-so-thin laser beam which cause burns....my ultimate purpose in not engraving....i just want it to make handheld, which burns a few wood or balloons at distance.
I managed to get a small focal point with it....Now im confused that if i should use it "with gball lens + g8 lens" or
"w/o gball lens(decanned) + g8 lens"
Well that you need to sort out yourself by testing
@@TECHResearchDevelopment Also if you know the Max operating temp. of a single NUBM08
pls let me know...as all the specs out there shows the Max Op. temp. to be 0-70deg. but for the entire laser diode block.
By any chance, if you know the Max operating temp. of a single NUBM08
pls let me know...as all the specs out there show the Max Op. temp. to be 0-70deg. but for the entire laser diode block.
Just make sure the temp on single nubm08 LD should not exceed 33°C for long life of the LD with a voltage of 4.7v 1-2amp
@@TECHResearchDevelopment 1min -35 degree-1amps
That was the best I achieved.
I think its my heat sink cause I dont have a fan or anything on it. It's just an cylindrical aluminum piece.
Thing is its best for my application, I wanted to run the diode at 3 amps for not more than 1 min or so.
Result:
1min-43 deg- 3amps
2min-47 deg-3amps
etc.
(Though I'll just run the new diode for less than 1min )
I read on #laserpointerform you should run diode on 10deg less than the max operating temp for longer life.
And for NUMB08 max op. temp is 65deg,
where I'm just running it up till 43 to 45 deg.
so ACC. to laserpointerform i think I'm way below the safe limit already.
What do u think, is it true that if we run it 10deg less than the max op. temp would preserve the life of diode?
@@armancodeq3642 i didn't get you, because 1st you said for 1min temp was 35deg at 1amp but later in result section you mentioned 45deg for 1min usage at 3amps.
Although its mentioned in laser_pointer_form max temp is 65deg or so... I would still recommend you to not exceed temp more than 35deg, try to control the laser temp by considering 35deg as max and also don't go for peak current of 3amp go for 2-2.5amp as it will increase life span of LD.
So overall consider temp
@@TECHResearchDevelopment
ya when i ran LD on
1A -- For 1min -- LD temp from 25deg (room temp.) reaches upto 35deg.
3A -- For 1min -- LD temp from 25deg (room temp.) reaches upto 43deg.
Apart from that, i feel u r right about running it on 2-2.5 Amps.
*Some says we need to warm the diode up as well before running it on high amps. Is that true??*
( I am still researching about the maintenance temp. of LD, which you told to keep below 40deg, will tell you if I found something new.)
Thnkx :]
hey i am a laser hobbyiest ...and i really cant find the diode or they are very expensive ,where did you got the diode from?
I had order it specifically for my machine msg me on fb through description
You can order nichia NUBM08 on ebay. They run around $30 a diode.
There are stocks present in the USA still.
Sir I am also interested in buying laser module but want contact info please share us
Hi contact me if you get the laser module I also want
You can contact through Instagram link in the description
since u remove the original stock lens of the laser diode.
Won't it reduces the life of laser diode, maybe by dust or dirt?
Yes it will, dust will affect the life and performance of the laser when you remove the stock lens and keep the LD aside for longtime. In my case once I removed the stock lens I immediately placed the LD in to the casing and attached the adjustable lens to it, so its negligible and not degrade the laser performance that much. But if you want you can clean the case with acetone and microfiber cloth and then remove the stock lens and place the LD.
*NOTE* :- DON'T TOUCH THE LASER DIODE ONCE THE STOCK LENS REMOVED
@@TECHResearchDevelopment ok so i have to immediately put the LD to the case after removing stock lens. And i better clean the copper case before putting the LD. RIGHT?
Yes and if possible apply thermal paste to outer part of copper housing while placing the copper housing to bigger heatsink like mine is blue one.
please..... dont play to make "efects" with video or music, is waste of time. the sound of the fan, are better
Hi , can you reply to FB message , thanks.
Sure..