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DIY A5 Programmable Power Supply Control
AETEK
Posts: 106🌟 Super Member 🌟
Post edited by Samuel Pinches on
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I don't know if a newbie will be comfortable working with mains wiring, but this does make the printer safer, as then the main motherboard can shut the power off in the case of an error. This modification fixes the vulnerability of fire risk from a mosfet failing and being stuck on. 👍
you may not have seen: classification professional.
on your photos of the modification I saw, that you have the original protective earth wiring as the A5 comes with.
What do you think of doing an additional connection of protective earth to the case part(s) as well?
It just comes to my mind, that I did it to the bottom case part only on my machine, not to the upper one ... forgotten -
And as alternative to do the tricky modification on the rocker switch for momentary action it would be possible to build in an additional (momentary) pushbutton for mains activation in parallel to the rocker switch, So you can decide if you turn the A5 on permanently with the rocker switch or have it under printer control by the pushbutton.
How do you see that, did I miss something there?
br
Andreas
I was rather thinking of adding a standard mains capable pushbutton in parallel to the original rocker switch in order to avoid the possibly difficult rocker switch modification towards a momentary rocker switch.
But I'm maybe thinking still too complicated also:
If I understand your circuit right, it's just about pressing the power switch as long as the A5 takes control on the solid state relay and keeps it activated as long as needed or commanded.
If you leave the original rocker switch as is and build the modification, then you can start the printer by switching the rocker switch to on until the printer beeps and turn it off then, this takes the same time and action as holding the modified rocker switch in on position until the printer beeps and takes control.
just my 2 cents
Cheers
Andreas
If I understand your circuit right, it's just about pressing the power switch as long as the A5 takes control on the solid state relay and keeps it activated as long as needed or commanded.
If you leave the original rocker switch as is and build the modification, then you can start the printer by switching the rocker switch to on until the printer beeps and turn it off then, this takes the same time and action as holding the modified rocker switch in on position until the printer beeps and takes control.<<
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