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Old 09-21-2016, 06:10 PM #1
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Default Melles Griot 643 Ar/Kr setup questions.

So I bought Alex's (Mariomaster) Melles Griot 643 Ar/Kr laser at SELEM and, being the extra cautious person that I am, have a few questions that I would like answered before I fire it up. Alex is evidently too busy to check his PM's, so I'll ask it here.

-For a 220V connection, the PSU's wires color code is, the green wire being ground, and blue & brown wires hot?
-I measured the voltage from the two phases at my house and it is 245V, is that still OK for the PSU?
- How often is it recommended to run a Ar/Kr laser like this? Once every few months?


BTW, This is the box I made for putting the two 120V phases together for the PSU.



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Laser Safety Information

Mattronium's Laser Collection (with links to build threads etc.)

Noteworthy Lasers and λ's:
685nm: 24mW pointer pen
660nm: 230mW LPC-826
647.1nm: Omnichrome 643 Ar/Kr ion 5-line max (high hours)
638nm: 600mW Kryton Groove
635nm: 5.8mW DIY pointer pen 0.6mrad
632.8nm: 20mW HeNe SP-107 - 6mW Hughes 3225H-C made in 1980.
594.1nm: 4.1mW Coherent HeNe from Sigurthr - 1.7mW HeNe REO-LHYR-0050M
568.2nm: Ar/Kr
543.5nm: 3.1mW Coherent HeNe
537nm / 542nm / 545nm / 550nm multi-line DPSS +/- 1nm
532nm: 500mw CNI PGL-III-C
515nm: 36mW laserBtB
514.5nm/501.7nm/496.5nm /488.0nm/476.5nm/457.9nm 2214-40MLA Argon Ion
462nm: 2W M462 Kryton Groove
450nm: 94mW laserBtB
445nm: 2.5W NDB7875 Kryton Groove - 40mW Pen laser using NDB7242E diode
405nm: 100mW PHR-805T

Building: 337.1nm: TEA laser

"Fiat Lux" - preferably laser light.

Last edited by Mattronium; 09-24-2016 at 09:40 PM.
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Old 09-21-2016, 11:47 PM #2
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Default Re: Melles Griot 643 Ar/Kr setup questions.

your voltage is fine.
maint. burn for 1-2 (min 30 mins) hrs a month. i run mine on full power for about 15 mins, then drop to 1/2 power for 45 mins, then ( if not time restricted) i run it at low power for an hr or so and then shutdown.
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Old 09-22-2016, 10:49 PM #3
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Default Re: Melles Griot 643 Ar/Kr setup questions.

I imagine that should be ok, though it may be somewhat hard on the components in the long term. They come in 220/230/240V versions for the 643s but most are 220. The only differences are some of parts have slightly different values and a few other little tidbits. But i've been told they're not the easiest to convert back-and-forth. They should run fine on such a setup. I use a step up transformer. Mainly, id more be in mind the current draw or you may blow breakers or something in your house, which is more likely.
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325nm: Omni 2056-M-A01 HeCd
375nm: Melles Griot RCS-007

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

472nm Omni-643RYB Whitelight Line
473nm: CNI MGL-473-100, 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 MGL-F-3W, LG Hercules-325
543.5nm: 05-LGR-193 Melles Griot HeNe 3.8mW
Melles Griot LGB-563 HeNe

561nm: Melles Griot 85-YCA-015, Coherent Sapphire 561-20
568nm: Omni-643RYB Whitelight Line

577nm
583.8nm
586.2nm
588.6nm: CNI PGL-M-80

591nm
593.5nm CNI MGL-H-50 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, others
Melles Griot LHB-580, LHB-190, WHR-570

641nm: Melles Griot RCS
647nm: Omni-643RYB Whitelight Line
659.3nm: Laser Quantum IGNIS 0.5W

671nm: CNI PGL-III-C-100
676nm: Omni-643RYB Whitelight Line
690nm: custom diode laser
694nm: Portable Q-switched Ruby Laser

1152.6nm: SP-120 HeNe alt. mirrors
1153nm: SP-120 alt. mirrors
1523.5nm: Melles Griot LIR-151 HeNe
3391nm: SP-124 alt. mirrors
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Old 09-24-2016, 09:44 PM #4
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Default Re: Melles Griot 643 Ar/Kr setup questions.

OK, thanks guys.

I ran it last night for about half an hour. Lasing started at 6.5A.
I didn't see the second red line, so I might have to carefully adjust the alignment (just a little) and maybe run it a few more hours.






Picture below, running just at lasing threshold. Just under a kW.

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Laser Safety Information

Mattronium's Laser Collection (with links to build threads etc.)

Noteworthy Lasers and λ's:
685nm: 24mW pointer pen
660nm: 230mW LPC-826
647.1nm: Omnichrome 643 Ar/Kr ion 5-line max (high hours)
638nm: 600mW Kryton Groove
635nm: 5.8mW DIY pointer pen 0.6mrad
632.8nm: 20mW HeNe SP-107 - 6mW Hughes 3225H-C made in 1980.
594.1nm: 4.1mW Coherent HeNe from Sigurthr - 1.7mW HeNe REO-LHYR-0050M
568.2nm: Ar/Kr
543.5nm: 3.1mW Coherent HeNe
537nm / 542nm / 545nm / 550nm multi-line DPSS +/- 1nm
532nm: 500mw CNI PGL-III-C
515nm: 36mW laserBtB
514.5nm/501.7nm/496.5nm /488.0nm/476.5nm/457.9nm 2214-40MLA Argon Ion
462nm: 2W M462 Kryton Groove
450nm: 94mW laserBtB
445nm: 2.5W NDB7875 Kryton Groove - 40mW Pen laser using NDB7242E diode
405nm: 100mW PHR-805T

Building: 337.1nm: TEA laser

"Fiat Lux" - preferably laser light.

Last edited by Mattronium; 09-24-2016 at 09:45 PM.
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Old 09-24-2016, 09:58 PM #5
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Default Re: Melles Griot 643 Ar/Kr setup questions.

mine lases at all currents, though pretty weakly at the bottom half. how many hours are on it, and how well are you cooling it? mine has over 300 cfm over it! and dont pick it up by the ends or you'll bend up the mirror mounts and have to realign it. if it hasn't been cleaned you may want to do that. I can show you how if you want.
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325nm: Omni 2056-M-A01 HeCd
375nm: Melles Griot RCS-007

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

472nm Omni-643RYB Whitelight Line
473nm: CNI MGL-473-100, 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 MGL-F-3W, LG Hercules-325
543.5nm: 05-LGR-193 Melles Griot HeNe 3.8mW
Melles Griot LGB-563 HeNe

561nm: Melles Griot 85-YCA-015, Coherent Sapphire 561-20
568nm: Omni-643RYB Whitelight Line

577nm
583.8nm
586.2nm
588.6nm: CNI PGL-M-80

591nm
593.5nm CNI MGL-H-50 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, others
Melles Griot LHB-580, LHB-190, WHR-570

641nm: Melles Griot RCS
647nm: Omni-643RYB Whitelight Line
659.3nm: Laser Quantum IGNIS 0.5W

671nm: CNI PGL-III-C-100
676nm: Omni-643RYB Whitelight Line
690nm: custom diode laser
694nm: Portable Q-switched Ruby Laser

1152.6nm: SP-120 HeNe alt. mirrors
1153nm: SP-120 alt. mirrors
1523.5nm: Melles Griot LIR-151 HeNe
3391nm: SP-124 alt. mirrors
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Old 09-25-2016, 03:47 PM #6
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Default Re: Melles Griot 643 Ar/Kr setup questions.

i'd have to agree with Kaiser on the cooling. is that just 2 PC fans that you're using?? if so, that not near enough airflow to cool one of these beasts. mine has a stock fan and on high will heat a 300 sq ft room by 7-10 deg F in an hr or so. really moves a lot of very warm air. make sure that your not leaking air near the fans as well, the tube shroud/cowl is designed to pull air from the ends of the tube, up and out but if air is leaking past the fan/cowl area, that will greatly reduce the amount of air moving around the tube.
and def watch the OC/HR mirror stems, they are very weak and prone to bending. i'm working on building an insulated mirror stem alignment ring set up for mine since these seem to lack any real mirror alignment ability that's stable.
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Old 09-25-2016, 05:55 PM #7
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Default Re: Melles Griot 643 Ar/Kr setup questions.

It's just because the frame is a part of the laser, so the alignment changes with how hot it gets. If you pick it up by the ends then the weight of the laser is on the alignment rods. It's not an issue if you pick it up from the sides. They have a pretty narrow bore and are fairly difficult to align. They are aligned generally at/near full power. Cleanliness is essential for these, as any particle in the beam path blocks a lot of light and can get baked on. Mine pushes over 300cfm with a very good deal on thermally and impedance protected papst fans IIRC. It sounds like a jet taking off! After I turn off the supply, the fans stay on for a few minutes to cool the tube before shutting off.
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325nm: Omni 2056-M-A01 HeCd
375nm: Melles Griot RCS-007

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

472nm Omni-643RYB Whitelight Line
473nm: CNI MGL-473-100, 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 MGL-F-3W, LG Hercules-325
543.5nm: 05-LGR-193 Melles Griot HeNe 3.8mW
Melles Griot LGB-563 HeNe

561nm: Melles Griot 85-YCA-015, Coherent Sapphire 561-20
568nm: Omni-643RYB Whitelight Line

577nm
583.8nm
586.2nm
588.6nm: CNI PGL-M-80

591nm
593.5nm CNI MGL-H-50 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, others
Melles Griot LHB-580, LHB-190, WHR-570

641nm: Melles Griot RCS
647nm: Omni-643RYB Whitelight Line
659.3nm: Laser Quantum IGNIS 0.5W

671nm: CNI PGL-III-C-100
676nm: Omni-643RYB Whitelight Line
690nm: custom diode laser
694nm: Portable Q-switched Ruby Laser

1152.6nm: SP-120 HeNe alt. mirrors
1153nm: SP-120 alt. mirrors
1523.5nm: Melles Griot LIR-151 HeNe
3391nm: SP-124 alt. mirrors

Last edited by ultimatekaiser; 11-06-2016 at 01:57 AM.
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Old 09-27-2016, 04:36 AM #8
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Default Re: Melles Griot 643 Ar/Kr setup questions.

The tube has quite a few hours on it, so it is getting old. I don't remember the exact numbers though.
The fans are 12V at 1.4A and 1.6A. For my test I was slightly under powering them, so next time I run it I'll set it up to run the fans at the full 12 volts.

Thanks for the advice/info.
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Laser Safety Information

Mattronium's Laser Collection (with links to build threads etc.)

Noteworthy Lasers and λ's:
685nm: 24mW pointer pen
660nm: 230mW LPC-826
647.1nm: Omnichrome 643 Ar/Kr ion 5-line max (high hours)
638nm: 600mW Kryton Groove
635nm: 5.8mW DIY pointer pen 0.6mrad
632.8nm: 20mW HeNe SP-107 - 6mW Hughes 3225H-C made in 1980.
594.1nm: 4.1mW Coherent HeNe from Sigurthr - 1.7mW HeNe REO-LHYR-0050M
568.2nm: Ar/Kr
543.5nm: 3.1mW Coherent HeNe
537nm / 542nm / 545nm / 550nm multi-line DPSS +/- 1nm
532nm: 500mw CNI PGL-III-C
515nm: 36mW laserBtB
514.5nm/501.7nm/496.5nm /488.0nm/476.5nm/457.9nm 2214-40MLA Argon Ion
462nm: 2W M462 Kryton Groove
450nm: 94mW laserBtB
445nm: 2.5W NDB7875 Kryton Groove - 40mW Pen laser using NDB7242E diode
405nm: 100mW PHR-805T

Building: 337.1nm: TEA laser

"Fiat Lux" - preferably laser light.
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Old 09-27-2016, 06:10 PM #9
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Default Re: Melles Griot 643 Ar/Kr setup questions.

Yes, I suspect you're pushing 100cfm or so per fan, which should be good up to a bit over a kW. If you're running nearly full power and it's barely hitting a kW then it sounds pretty old. That must mean the operating voltage has dropped significantly, which is a sign of low pressure. It should be probably close to 185V.
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325nm: Omni 2056-M-A01 HeCd
375nm: Melles Griot RCS-007

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

472nm Omni-643RYB Whitelight Line
473nm: CNI MGL-473-100, 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 MGL-F-3W, LG Hercules-325
543.5nm: 05-LGR-193 Melles Griot HeNe 3.8mW
Melles Griot LGB-563 HeNe

561nm: Melles Griot 85-YCA-015, Coherent Sapphire 561-20
568nm: Omni-643RYB Whitelight Line

577nm
583.8nm
586.2nm
588.6nm: CNI PGL-M-80

591nm
593.5nm CNI MGL-H-50 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, others
Melles Griot LHB-580, LHB-190, WHR-570

641nm: Melles Griot RCS
647nm: Omni-643RYB Whitelight Line
659.3nm: Laser Quantum IGNIS 0.5W

671nm: CNI PGL-III-C-100
676nm: Omni-643RYB Whitelight Line
690nm: custom diode laser
694nm: Portable Q-switched Ruby Laser

1152.6nm: SP-120 HeNe alt. mirrors
1153nm: SP-120 alt. mirrors
1523.5nm: Melles Griot LIR-151 HeNe
3391nm: SP-124 alt. mirrors
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Old 09-27-2016, 08:47 PM #10
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Default Re: Melles Griot 643 Ar/Kr setup questions.

At full power it is drawing much more than 1kW, it was at the lasing threshold that it was just under a kW. At max I think it would be close to 2.5kW (I think I saw 10A for a second when I increased the current for brief moment).
I won't be at my house for a few weeks so I won't be able to test it very soon.
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Mattronium's Laser Collection (with links to build threads etc.)

Noteworthy Lasers and λ's:
685nm: 24mW pointer pen
660nm: 230mW LPC-826
647.1nm: Omnichrome 643 Ar/Kr ion 5-line max (high hours)
638nm: 600mW Kryton Groove
635nm: 5.8mW DIY pointer pen 0.6mrad
632.8nm: 20mW HeNe SP-107 - 6mW Hughes 3225H-C made in 1980.
594.1nm: 4.1mW Coherent HeNe from Sigurthr - 1.7mW HeNe REO-LHYR-0050M
568.2nm: Ar/Kr
543.5nm: 3.1mW Coherent HeNe
537nm / 542nm / 545nm / 550nm multi-line DPSS +/- 1nm
532nm: 500mw CNI PGL-III-C
515nm: 36mW laserBtB
514.5nm/501.7nm/496.5nm /488.0nm/476.5nm/457.9nm 2214-40MLA Argon Ion
462nm: 2W M462 Kryton Groove
450nm: 94mW laserBtB
445nm: 2.5W NDB7875 Kryton Groove - 40mW Pen laser using NDB7242E diode
405nm: 100mW PHR-805T

Building: 337.1nm: TEA laser

"Fiat Lux" - preferably laser light.

Last edited by Mattronium; 09-27-2016 at 08:49 PM.
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