Anyone recognise this power supply?

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Preso
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Anyone recognise this power supply?

Post by Preso »

I have just removed the laser tube power supply from my 40W Chinese machine hoping that I would be able to work out how to connect it to the AWC608 controller. Unfortunately there are no marks or connection identifiers anywhere on the outside of the case and the previous setup won't work with the AWC608. What I am wanting to know is if this is a PWM power supply and if it has TTL or analogue control. Also, if any guru out there can identify how to connect it to the AWC608 I would be most grateful. PS: It's a 240V unit.

Regards,

Preso
Attachments
Power supply side.JPG
Power supply rear.JPG
Power supply top.JPG
Preso
Posts: 23
Joined: Wed Jul 23, 2014 9:49 pm
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Re: Anyone recognise this power supply?

Post by Preso »

OK, I have just found a similar post from last year and in that post Marco agreed that this PS was OK. The post even had the correct terminal connection diagram. However if someone can confirm I am OK with this unit I would feel a lot better about firing it up. With regard to the big green resistor, what is it's purpose and do I still need it in the circuit?

Regards,

Preso
Tech_Marco
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Re: Anyone recognise this power supply?

Post by Tech_Marco »

There should be marking on the PCB board. It looks like it is a regular PWM power supply.
But, it is having two high voltage transformer so I believe that this PSU is either a 60W or 80W in power.
If it is a 60W, it still ok to work with a 40W laser tube. But if it is a 80W, then don't use it as the triggering voltage is higher and it may cause damage on laser tube. Plus, it can saturated a 40W very quick so engraving may not be good.


Marco
Preso
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Re: Anyone recognise this power supply?

Post by Preso »

OK Marco. I'll check the PCB. However this was the original PSU that came with the tube and the machine so I am hoping they are compatible. I suspect the tube will be kaput anyway as it has been sitting idle for around three years. Is there any way to be sure if the supply is 60W or 80W?
Regards,
Preso
Tech_Marco
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Re: Anyone recognise this power supply?

Post by Tech_Marco »

No way we can tell whether is it 60W or 80W unless you have some 'dummy' load (high wattage resistor) to be used to check output current
The resistors are 200W each and need 5 ~ 10 units connected in series.

FYI, if there is only one HV transformer, most likely it is a 40W
If two HV transformer, either 60W or 80W
If three HV transformer, it is 100W to 150W (180W)


Marco
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