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Random droput of ps_on during print

Posted by davies46 
Random droput of ps_on during print
October 17, 2019 03:48AM
I've selected POWER_SUPPLY 1 and enabled AUTO_POWER_CONTROL, taken 5v from RAMPS to SSR to ps_on, and it generally works fine... except partway through a print the PSU goes off for about 0.2s, which loses XY position.

When I connect the SSR -ve direct to ground instead of ps_on it all works perfectly - minus the auto control.

It's like the AUTO part briefly decides power isn't needed. The SSR apparently runs from 3v upwards so I don't think it's that.

Was wondering if anyone else has had the same problem.

I think I have v1.1.9 Marlin...

Re: Random droput of ps_on during print
October 18, 2019 03:16PM
Are you sure this is a Marlin problem, or PSU control problem? Does this happen at about the same time (which would suggest it's a heating issue) or the same XYZ location (which would suggest its a mecjanical issue)?

My first guess is that your heater cartridge wires are shorting, which drops the power supply voltage at the SSR enough to reset it.
Re: Random droput of ps_on during print
October 20, 2019 08:26PM
Sorry, had trouble finding my way back to this thread!

It was a total screw-up on my part and was the actual mains supply to that power socket dropping out!

Fixed the house and now the power control works a charm.
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