argon
0
- Joined
- Jan 13, 2010
- Messages
- 72
- Points
- 8
Dear Laserfreaks out there
Recently I acquired a complete low power argon laser system for very little money It is a Uniphase 2201-20SL (20mW single line 488nm) with a power supply 2101.
The system works, but there is a strange thing: Even after the laser has fired and works normally, the igniter still produces ignition pulses (they can be heard). When I run the power up to high currents, the ignitier suddenly stops, but when reducing tube current to idle, the pulses come again. I'm not sure, if there are high voltage pulses while the discharge is lit, but I can imagine, that this is not such a nice situation for the tube.
I found out, that the problem doesn't lie on the igniter-board of the laserhead, but at the power supply itself. There is an igniter-disable-signal which doesn't change from low to high after ignition. I tried to find the fault in the power supply unit 2101, but this is not as easy as I thought without a schematic. Does anybody have the same power supply / laser system and maybe could tell me, if this is normal? Or does anybody have a schematic of this power supply unit? Or doesn anyone know this failure?
Some more pics of the system:
And the system running a first time:
Many thanks for every answer!
Best regards
argon
Recently I acquired a complete low power argon laser system for very little money It is a Uniphase 2201-20SL (20mW single line 488nm) with a power supply 2101.
The system works, but there is a strange thing: Even after the laser has fired and works normally, the igniter still produces ignition pulses (they can be heard). When I run the power up to high currents, the ignitier suddenly stops, but when reducing tube current to idle, the pulses come again. I'm not sure, if there are high voltage pulses while the discharge is lit, but I can imagine, that this is not such a nice situation for the tube.
I found out, that the problem doesn't lie on the igniter-board of the laserhead, but at the power supply itself. There is an igniter-disable-signal which doesn't change from low to high after ignition. I tried to find the fault in the power supply unit 2101, but this is not as easy as I thought without a schematic. Does anybody have the same power supply / laser system and maybe could tell me, if this is normal? Or does anybody have a schematic of this power supply unit? Or doesn anyone know this failure?
Some more pics of the system:
And the system running a first time:
Many thanks for every answer!
Best regards
argon
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