Morgan
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- Feb 5, 2009
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Hi All,
Apologies if some of the copied post below is not appropriate but I just copied it from the GB thread. It turned into a bit of a review anyway as it was just a sled that needed testing. The test info is useful though and if I can edit before you see it then I will!
Here it is...
Some testing of a Lite-On!
So, I got home this evening and ripped straight into the package that's been waiting here for a few days, (well, not straight away. I know you want news but you gotta let a man eat!
).
A note: I am very careful with ESD precautions. All through the process of opening the package I am wearing my ESD wrist strap and the work surface is also grounded. I even went into the package from the bottom to avoid too much packing tape!
These two will both eventually be tested but only one has data attached to it as yet.
The sled!
You can see the PCB has the correct SF-BW512L stencil but not in the same place for each sled...
... One has it on the right...
...one on the left.
Both together. Notice slight bending of the optic shroud on the bottom one...?
This is the one I chose to tear into first. Slight damage like this isn't uncommon in my experience with other sleds and it isn't anywhere near the damage on the box so I don't think they are connected.
The back bar code...
extracted diode still in heatsink...
Safely installed in an Aixiz... (A little tip here: If you have a Flaminpyro GGW 6x diode extraction cup tool then clip the corners of the original heatsink, (at least I had to as they were slightly misshapen by trying other techniques), to fit squarely in the extraction cup tool. Use an old diode, face to face with your new one and gently push the old diode in with the screw and the new diode comes out the back of the heatsink! I could probably explain that better and will look to improve this but that's how I extracted the diode effortlessly!)
After this I ran some tests....
Lasing threshold - 3.65V at 30mA
Run from there in 25mA steps we get these results on my LaserBee I @ 150mm using a Jayrob 405-G-1 lens
V-------mA-----mW
3.97----50------33
4.3-----75------71
4.55----100----107
4.78----125----146
4.98----150----186
5.15----175----228
5.28----200----262
5.39----225----302
5.49----250----340
5.57----275----379
5.64----300----412
5.71----325----450
5.76----350----483
5.81----375----518 Class IV!
5.85----400----551
5.89----425----586
5.93----450----619
5.96----475----653
5.99----500----685
Here's a pic of the readings, (ignore the peak value as this was merely tuning to 500mA) ...
I would have stopped at 500mA but wanted to see 700mW, so...
Final reading...
6.02----525----717
All in all I think the test was pretty good. I have the other one to do so it is only one set of data but it makes me feel better to have checked at least one. Please forgive the state of my workstation. I have been busy going back to college, arranging GBs and the like. ESD precautions are still VERY intact.
M
Apologies if some of the copied post below is not appropriate but I just copied it from the GB thread. It turned into a bit of a review anyway as it was just a sled that needed testing. The test info is useful though and if I can edit before you see it then I will!
Here it is...
Some testing of a Lite-On!
So, I got home this evening and ripped straight into the package that's been waiting here for a few days, (well, not straight away. I know you want news but you gotta let a man eat!
). A note: I am very careful with ESD precautions. All through the process of opening the package I am wearing my ESD wrist strap and the work surface is also grounded. I even went into the package from the bottom to avoid too much packing tape!
These two will both eventually be tested but only one has data attached to it as yet.
The sled!
You can see the PCB has the correct SF-BW512L stencil but not in the same place for each sled...
... One has it on the right...
...one on the left.
Both together. Notice slight bending of the optic shroud on the bottom one...?
This is the one I chose to tear into first. Slight damage like this isn't uncommon in my experience with other sleds and it isn't anywhere near the damage on the box so I don't think they are connected.
The back bar code...
extracted diode still in heatsink...
Safely installed in an Aixiz... (A little tip here: If you have a Flaminpyro GGW 6x diode extraction cup tool then clip the corners of the original heatsink, (at least I had to as they were slightly misshapen by trying other techniques), to fit squarely in the extraction cup tool. Use an old diode, face to face with your new one and gently push the old diode in with the screw and the new diode comes out the back of the heatsink! I could probably explain that better and will look to improve this but that's how I extracted the diode effortlessly!)
After this I ran some tests....
Lasing threshold - 3.65V at 30mA
Run from there in 25mA steps we get these results on my LaserBee I @ 150mm using a Jayrob 405-G-1 lens
V-------mA-----mW
3.97----50------33
4.3-----75------71
4.55----100----107
4.78----125----146
4.98----150----186
5.15----175----228
5.28----200----262
5.39----225----302
5.49----250----340
5.57----275----379
5.64----300----412
5.71----325----450
5.76----350----483
5.81----375----518 Class IV!
5.85----400----551
5.89----425----586
5.93----450----619
5.96----475----653
5.99----500----685
Here's a pic of the readings, (ignore the peak value as this was merely tuning to 500mA) ...
I would have stopped at 500mA but wanted to see 700mW, so...
Final reading...
6.02----525----717
All in all I think the test was pretty good. I have the other one to do so it is only one set of data but it makes me feel better to have checked at least one. Please forgive the state of my workstation. I have been busy going back to college, arranging GBs and the like. ESD precautions are still VERY intact.
M
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