Working on finalizing a trident build and really want to add a crazy feature. I want to add a master relay after the main power switch with the following idea. Total power disconnect after print finish.
Normal a relay like this would be powered by a low voltage dc source. But in order for the remote push button on the relay to work the psu must remain always connected to power resulting in a phantom power draw unless the main power switch is turned off. That shouldn't be alot of lost power but if I can design it out I want too would love to go 100% off grid and every watt matters.
Concept:
Add 2 pole relay directly after main switch (line and neutral)
Add momentary push button on front of printer wired to upstream ac line and relay trigger. When button is activated it contacts the relay and latches closed.
Now the part I don't know. How to do 2 modes to open the relay:
1. Push button on front panel (think emergency kill) directly tied to relay control
2. Discreet from either the Pie (5v) or the main board (think i have a 5v or i could trigger a fan header so 5-48v). Signal into a time delay trigger (30-60 seconds).
Push button is instant and the discreet with timer would allow an end of print macro to a) trigger power kill and b) proper shut down the pie to avoid data corruption.
I'm familiar with latching relays, ac controlled relays, din mount time delay triggers, and dc logic triggering. The part I'm not sure about is the latch with 120/250V AC and reset with 5-48V DC part.
Building a 350mm unit so not really worried about space. Also this would make an amazing add-on box for a smaller unit.
Ultimately I'm trying to build the unit so I can leave it running long prints and post print tempering profiles without major problems.
I may upgrade the 10EGG1-2 Filtered Power Inlet to a non filtered unit and add a filter down-stream of this mod. Both to reduce leakage power and to upgrade from 10A max to full 15A max. Looking at a 1000watt bed heater and adding not only a few hundred watt chamber heater but also a tool changer with between 2 and 5 heads. The extra power budget would be useful.
Anyone know a way to do it? Or a good place for me to go ask the same question else where?
If I need to draw this out for clarity I can but it's gonna look like crap.
Normal a relay like this would be powered by a low voltage dc source. But in order for the remote push button on the relay to work the psu must remain always connected to power resulting in a phantom power draw unless the main power switch is turned off. That shouldn't be alot of lost power but if I can design it out I want too would love to go 100% off grid and every watt matters.
Concept:
Add 2 pole relay directly after main switch (line and neutral)
Add momentary push button on front of printer wired to upstream ac line and relay trigger. When button is activated it contacts the relay and latches closed.
Now the part I don't know. How to do 2 modes to open the relay:
1. Push button on front panel (think emergency kill) directly tied to relay control
2. Discreet from either the Pie (5v) or the main board (think i have a 5v or i could trigger a fan header so 5-48v). Signal into a time delay trigger (30-60 seconds).
Push button is instant and the discreet with timer would allow an end of print macro to a) trigger power kill and b) proper shut down the pie to avoid data corruption.
I'm familiar with latching relays, ac controlled relays, din mount time delay triggers, and dc logic triggering. The part I'm not sure about is the latch with 120/250V AC and reset with 5-48V DC part.
Building a 350mm unit so not really worried about space. Also this would make an amazing add-on box for a smaller unit.
Ultimately I'm trying to build the unit so I can leave it running long prints and post print tempering profiles without major problems.
I may upgrade the 10EGG1-2 Filtered Power Inlet to a non filtered unit and add a filter down-stream of this mod. Both to reduce leakage power and to upgrade from 10A max to full 15A max. Looking at a 1000watt bed heater and adding not only a few hundred watt chamber heater but also a tool changer with between 2 and 5 heads. The extra power budget would be useful.
Anyone know a way to do it? Or a good place for me to go ask the same question else where?
If I need to draw this out for clarity I can but it's gonna look like crap.
Post here what you come up with, I am sure people will be interested.