Powermax 45xp lost arc delay (Solved)

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5 years 8 months ago #199179 by Nick7251
@PCW
Is the SSR circuit different on the 7i96 vs the 7i76? Would you mind sharing just that part of the schematic with component values? Maybe that will help in diagnosing why there seems to be issues with some peoples SSR for firing the torch.

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5 years 8 months ago - 5 years 8 months ago #199180 by PCW
Replied by PCW on topic Powermax 45xp lost arc delay
The circuits are different

The 7I96 has a transformer driven MOSFET
0 to 2A, 0 to 36V less than 1 uA off resistance
less the 50 mOhms on resistance

The 7I76E has a standard Darlington Optocoupler
0 to 50 mA, 0 to 100V ~.7V drop when on
less than 20 uA leakage when off (at 200V)

Both are polarized and will typically show as stuck-on if reversed
Last edit: 5 years 8 months ago by PCW.
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5 years 8 months ago #199194 by tommylight
Editing the above post made by me, failed to mention that i know of many more who use 7i96 and 7i76 to fire the torch without issues, but finding them proved a bit harder, as Rod said they are using the machines so not much chat here.
I did write a lengthy reply today and did not post it as i still have problems explaining things in writing, but the general idea was Snowwy and some others are right as they had issues and now they do not with a relay, for others it does work, and that is all good.
Chasing such issues can take a looooong time, installing a relay takes about 10 minutes.
Just do not blame SSR, and so far no one explicitly did, just the discussion went a bit in that direction.

This might be a bit personal, but, i really do not believe Snowwy ignored anything, he is very good at everything he does and he is a "heat seeking missile" for finding bugs, but written things do not get the whole message across, as noted above for me personally.
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5 years 8 months ago #199195 by phillc54
Yes, there seem to be words attributed to folk that were not said (or written)...

So @Nick7251 have you managed to get your machine working after all this waffle?
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5 years 8 months ago #199198 by tommylight

phillc54 wrote:
So @Nick7251 have you managed to get your machine working after all this waffle?

Yeah we did forget about you ! :) Although in the post i did not post i did offer you asylum in my country to escape all this ! :)
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5 years 8 months ago #199199 by phillc54

tommylight wrote:

phillc54 wrote:
So @Nick7251 have you managed to get your machine working after all this waffle?

Yeah we did forget about you ! :) Although in the post i did not post i did offer you asylum in my country to escape all this ! :)

:laugh: :laugh: Tom is that offer open to others? :)
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