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Old 08-24-2012, 05:55 PM #1
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Default M140 diode broken?

Hello

This is my M140 diode picture.
http://db.tt/Nro8rhxa

This broken????


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Old 08-24-2012, 06:01 PM #2
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Default Re: M140 diode broken?

There is Something "Wrong" With My Beam/Spot
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Old 08-24-2012, 06:09 PM #3
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Default Re: M140 diode broken?

Focused spot

http://db.tt/itX7aDBk
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Old 08-24-2012, 06:22 PM #4
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Default Re: M140 diode broken?

Thats normal
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Old 08-24-2012, 06:36 PM #5
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Default Re: M140 diode broken?

The lines are more pronounced than produced by either of my M140s but they appear normal to me. It is likely just a slight variation of the diode.
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Old 08-24-2012, 07:04 PM #6
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Default Re: M140 diode broken?

Power has decreased to about 30 mw
Everything has been to cut the wires and re-solder the diode.
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Old 08-24-2012, 07:14 PM #7
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Default Re: M140 diode broken?

Quote:
Originally Posted by fermintm View Post
Power has decreased to about 30 mw
Everything has been to cut the wires and re-solder the diode.
what current is it at?
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Old 08-24-2012, 08:23 PM #8
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Default Re: M140 diode broken?

Quote:
Originally Posted by AnthoT View Post
what current is it at?
1500ma

It worked perfectly until I decided to cut the wires because they were too long.
From there, the laser emits very little light now. I used to have to wear goggles.
I guess the diode has received some electrostatic discharge and therefore this also.
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Old 08-24-2012, 08:24 PM #9
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Default Re: M140 diode broken?

Quote:
Originally Posted by fermintm View Post
1500ma

It worked perfectly until I decided to cut the wires because they were too long.
From there, the laser emits very little light now. I used to have to wear goggles.
I guess the diode has received some electrostatic discharge and therefore this also.
And you are getting 30mw??! It's a zombie then
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Old 08-24-2012, 08:33 PM #10
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Default Re: M140 diode broken?

Quote:
Originally Posted by AnthoT View Post
And you are getting 30mw??! It's a zombie then
If. I'm afraid so.

With the crisis we have in Spain, decided to spend some money that cost me a big winner in a laser ...
Now I have a burned diode
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Old 08-24-2012, 08:47 PM #11
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Default Re: M140 diode broken?

Quote:
Originally Posted by fermintm View Post
If. I'm afraid so.

With the crisis we have in Spain, decided to spend some money that cost me a big winner in a laser ...
Now I have a burned diode
Possibly not... You said you cut the wires & re attached them, is it connected solid, try tapping the soldering iron quickly & melting it again, also make sure there isn't like 1-2 strands of wire, make sure it's ALL hooked up
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Old 08-24-2012, 09:35 PM #12
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Default Re: M140 diode broken?

As clear as the picture is, It's hard to tell whether part of the emitter is burnt or not.
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Old 08-24-2012, 09:43 PM #13
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Default Re: M140 diode broken?

Definitely this burned.
The diode becomes very hot with hardly emit light.
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Old 08-24-2012, 09:55 PM #14
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Default Re: M140 diode broken?

Okay then. yea well if it gets hot it's indeed a LED. sorry about your loss I have lost many 445s during my journey in lasers Others have burnt hundreds..
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Old 08-24-2012, 11:08 PM #15
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Default Re: M140 diode broken?

Is it possible after the wires were cut and you were working on shortening them the driver may have been inadvertently powered without a load even for the briefest of time? If so the cap may have charged and spiked the diode when you went to reconnect it.
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Old 08-24-2012, 11:11 PM #16
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Default Re: M140 diode broken?

Well guess you should just buy a new diode

Maybe you'll get lucky and get a freak one
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