power supply problms

hi guys i have a ps407 power supply that is acting up

basicly it works fine not connected to anything no faut light outputs fine too
but connected to a stepper driver it works fine for about 10 mins the goes to red light fault i know its not the driver as i have 4 of them and they all run fine on the other supply i have i just dont like running 4 drives of two power supplys

just wondered if anyone has had this problem???

is it fixable or is this bin food lol

just seems like its over heating under load and shutting down

cheers guys for any help

What drivers, and what is the DC voltage at the driver?
four drivers from one PS407 is cutting it fine.
For three axis with the PM542 we suggest two PS407 power supplies and this is the same for four axis.

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Originally Posted by Gary

What drivers, and what is the DC voltage at the driver?
four drivers from one PS407 is cutting it fine.
For three axis with the PM542 we suggest two PS407 power supplies and this is the same for four axis.

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sorry did not make it clear i did have 3 ps407 supplys but now only running 2 and drivers are pm542 x 4
so running 4 drives from 2 ps407 not all axis running at the same time at the moment lol using rotory table not using Y but driver powered
might unplug the driver

have to reconnect the power supply togive you voltage at driver forgot what it was ???

45.8v at driver i run very short wire

45.8V is too high.
The PS407 should be about 40V, can you double check?

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Originally Posted by Gary

45.8V is too high.
The PS407 should be about 40V, can you double check?

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now showing 46.5v ??

ok, can you check the other power supply to see what the voltage is.
This seems a bit high, and could be faulty?
Are you sure it is not a ps487?

Quote:

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Originally Posted by Gary

ok, can you check the other power supply to see what the voltage is.
This seems a bit high, and could be faulty?
Are you sure it is not a ps487?

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yep it is a ps407

one reads 44.2 other 43.4 and thats with them running at the moment

Strange, they should be 40V and 0A and 38V at 7A.
Can you check the AC, maybe you AC is very high?

I have just check the specifications and they are within tolerance so that is not the problem.
If you bought the PSU from us, and it is within warrantee, contact me and i will replace.

its over a year old from another vender so no warrantee but thanks for all your help
its just strange that it works fine for 10mins then red fail light come on

Ok, it is most likely getting hot.
Have you tried adding a fan?
But it is most likely better to replace.

Quote:

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Originally Posted by Gary

Ok, it is most likely getting hot.
Have you tried adding a fan?
But it is most likely better to replace.

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might try a fan

i will have to think about a new power supply as i might change out the stepper on my rotory table
and replace it with a servo

Two things to check...Leaky capacitors,you know when they're leaking a bulge occurs in the top of them.

Other thing is dry joints,these dry joints register ok when no power is pulled and occur when power is pulled.