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02-02-2015, 10:48 PM #1
 Class 3B Laser Join Date: Jan 2014 Location: Near Mosul, Iraq Posts: 4,252 Rep Power: 2090
Class 3B Laser

Join Date: Jan 2014
Location: Near Mosul, Iraq
Posts: 4,252
Rep Power: 2090
Bought a CNI MODEL MGL-4W but problems (edit: fixed)

Hello,

I bought a CNI MODEL MGL-4W on ebay but it puts out 2.18 watts, not the 4 watts the model number indicates. Can anyone give me advice on what normally causes the power output to drop to half when the units are used?

Edit: This is a 532nm and I found the problem, working now

Chris

__________________

http://www.lexellaser.com/techinfo_wavelengths.htm

Laser Safety:
http://www.laserpointersafety.com/index.html

Angular Size Calculator; use with diode angle of radiation specification to calculate the needed lens diameter for a given FL:
http://www.1728.org/angsize.htm

Divergence to spot size calculator: http://tinyurl.com/spotsize - 1 mRad is about .057 degrees which from the earth would expand to be ~10% the diameters of the moon or sun at their distances.

Divergence Calculator: http://www.pseudonomen.com/lasers/ca...alculator.html - Measure your lasers beamwidth at 1 foot & then at a further distance to calculate the divergence.

Online calculator to determine spot intensity at different mRad's & powers @ distances: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: http://www.ophiropt.com/laser-measur...ity-calculator

How to build a laser beam expander to reduce divergence: http://tinyurl.com/BeamExpander

RHD's Relative Perceived Brightness Calculator. Compare brightness @nm: http://lsrtools.1apps.com/relativebrightness

YAG Power Calculator, i.e. convert ns @ mJ to peak power in watts http://tinyurl.com/YAG-Pulse

The forum costs more to run than donations received, if you wish to help click this link: http://laserpointerforums.com/donations.htm

_______

Last edited by Alaskan; 02-03-2015 at 06:15 AM.

02-02-2015, 11:48 PM #2
 Class 3R Laser Join Date: Mar 2013 Location: Colorado, USA Posts: 2,413 Rep Power: 1039
ultimatekaiser
Class 3R Laser

Join Date: Mar 2013
Posts: 2,413
Rep Power: 1039
Re: Bought a CNI MODEL MGL-4W but problems

It's probably a driver issue. Though it could be crystal burn from age too. I almost bought one of those green and blue but someone outbid me. I can do a reset and give it a full cleaning, alignment, and tuning if you'd like I'd just need a higher wattage thermopile...It might have some mismatched equipment. I don't recommend opening the head in a household without a good well filtered room. I had to do the same thing with my yellow and 561 green labbies.
__________________
325nm: Omni 2056-M-A01 HeCd
375nm: Melles Griot RCS-007 9.2mW UV

405nm: custom build
441.6nm: Omnichrome 2056-M-A01/4074-P-A03 HeCd laser
430nm: Coherent D3 430-10
457.9nm: Uniphase 2214-40MLA Argon Ion Line

472nm Omni-643RYB Whitelight Line
473nm: CNI MGL-473 >100mW Lab laser, CNI GLP-473
476.5nm: Uniphase 2214-40MLA Argon Ion Line

483nm Omni-643RYB Whitelight Line
488nm: Uniphase 2214-40MLA Argon Ion Line, Spectra Physics >20mW Cyan DECSL Laser

496.5nm: Uniphase 2214-40MLA Argon Ion Line
501.7: Uniphase 2214-40MLA Argon Ion Line
514.5nm: Uniphase 2214-40MLA Argon Ion Line
520nm: Trustfire A8 Custom

532nm: CNI lab >3W OEM, CNI MSL-532 >80mW SLM lab laser, LG Hercules-325
543.5nm: 05-LGR-193 Melles Griot HeNe 3.8mW
Melles Griot LGB-563 HeNe

561nm: Melles Griot 85-YCA-015 15mW Lab Laser
568nm: Omni-643RYB Whitelight Line

583.8nm
586.2nm
588.6nm: >80mW CNI PGL-M, 50mW CNI PGL-C

593.5nm CNI >50mW MGL-H Lab Laser
594.1nm: Coherent 31-2230-000 (4.5mW)

604.6nm: LOR-150 HeNe line
609nm REO LHYR-250M HeNe line
611.8nm: Melles Griot LOR-150 HeNe (5mW), LOR-006 HeNe (0.5mW)

632.8nm: Spectra Physics Model-127 (>35mW), Model-124B, Model-120, Model-117, many others
Melles Griot LHB-580, LHB-190, WHR-570

647nm: Omni-643RYB Whitelight Line
658nm: Generic pointer

671nm: CNI PGL-III-C (100mW+)
675nm: Custom 501B w/ lab diode (22mW)
676nm: Omni-643RYB Whitelight Line
690nm: custom build
694nm: Portable Q-switched Ruby Laser

1152.6nm: SP-120 HeNe alt. mirrors
1523.5nm: Melles Griot LIR-151 HeNe
3391nm: SP-120 alt. mirrors

Last edited by ultimatekaiser; 02-02-2015 at 11:59 PM.

02-03-2015, 12:02 AM #3
 Class 3B Laser Join Date: Jan 2014 Location: Near Mosul, Iraq Posts: 4,252 Rep Power: 2090
Class 3B Laser

Join Date: Jan 2014
Location: Near Mosul, Iraq
Posts: 4,252
Rep Power: 2090
Re: Bought a CNI MODEL MGL-4W but problems

pm incoming, i bought it for BIN when he dropped the price to 899 but didn't bid on that auction.

Edit: Found the problem but still need a manual to tune it up, I believe they mixed the power supply/control boxes from some of the other units of the same model they were selling.

Chris

I have circled in red the pots I believe will need to be adjusted to tune the unit for optimum efficiency but am without verification or a manual, I would sure like to find a proceedure for this specific power supply so I can work on it, anyone who can direct me? I've heard getting such from the manufacturer is difficult for older units.

I'm being asked why i want such a high power laser, have you seen the size of the mosquitos up here?

Post your random pics!
__________________

http://www.lexellaser.com/techinfo_wavelengths.htm

Laser Safety:
http://www.laserpointersafety.com/index.html

Angular Size Calculator; use with diode angle of radiation specification to calculate the needed lens diameter for a given FL:
http://www.1728.org/angsize.htm

Divergence to spot size calculator: http://tinyurl.com/spotsize - 1 mRad is about .057 degrees which from the earth would expand to be ~10% the diameters of the moon or sun at their distances.

Divergence Calculator: http://www.pseudonomen.com/lasers/ca...alculator.html - Measure your lasers beamwidth at 1 foot & then at a further distance to calculate the divergence.

Online calculator to determine spot intensity at different mRad's & powers @ distances: http://tinyurl.com/divergence-calculator

Laser Power Density Calculator: http://www.ophiropt.com/laser-measur...ity-calculator

How to build a laser beam expander to reduce divergence: http://tinyurl.com/BeamExpander

RHD's Relative Perceived Brightness Calculator. Compare brightness @nm: http://lsrtools.1apps.com/relativebrightness

YAG Power Calculator, i.e. convert ns @ mJ to peak power in watts http://tinyurl.com/YAG-Pulse

The forum costs more to run than donations received, if you wish to help click this link: http://laserpointerforums.com/donations.htm

_______

Last edited by Alaskan; 02-04-2015 at 06:47 AM.

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