New Power Supply dilemma
Posted by Lord Jambrek
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Re: New Power Supply dilemma April 04, 2017 03:55AM |
My solution is a 2 PSU solution. Use a laptop supply (or xbox supply, which are better made and have fans etc..) for the controller board, and therefore hotend, fans, motors. Then use a second supply for the heated bed, this could be mains powered (via an SSR) or DC (via your mosfet expansion board - which I think are a great idea BTW) in which case you will get a far better experience using 24v, faster heating up times, less current flowing through often wires that are too thin.
If you stick with what you have now then its a case of seeing things more clearly re. the electronics. Your current 12v supply essentially outputs 1x12v dc positive, 1xground. It might have 3 connectors or 1 connector. If it has one connector then you need to connect in parallel, your controller board (if ramps then that means both rails), and the mosfet expansion board. Either try to stuff three wires into the connector or better get some sort of distribution block which can accept one wire input and three wires output.
This is a one-PSU setup.
Now I'm not saying this is the neatest solution but you can see what I mean, the x box PSU outputs 3 connection 3xyellow + and 3xblack - but I have aggregated them and then distributed them to whatever needs power.
Its worth mentioning the green power connectors on these boards (this is a ramps board) are not great, I was getting an intermittent connection before I adjusted the connector, if this was not a micro sized delta, with quite modest power requirements the connectors would have been a fire risk, from overheating due to too much current. Make sure everything is solidly connected, do not use solder to tin wires as it crumbles under the tension from the screws holding it eventually. Crimps however are useful.
Edited 2 time(s). Last edit at 04/04/2017 05:57AM by DjDemonD.
Simon Khoury
Co-founder of [www.precisionpiezo.co.uk] Accurate, repeatable, versatile Z-Probes
Published:Inventions
If you stick with what you have now then its a case of seeing things more clearly re. the electronics. Your current 12v supply essentially outputs 1x12v dc positive, 1xground. It might have 3 connectors or 1 connector. If it has one connector then you need to connect in parallel, your controller board (if ramps then that means both rails), and the mosfet expansion board. Either try to stuff three wires into the connector or better get some sort of distribution block which can accept one wire input and three wires output.
This is a one-PSU setup.
Now I'm not saying this is the neatest solution but you can see what I mean, the x box PSU outputs 3 connection 3xyellow + and 3xblack - but I have aggregated them and then distributed them to whatever needs power.
Its worth mentioning the green power connectors on these boards (this is a ramps board) are not great, I was getting an intermittent connection before I adjusted the connector, if this was not a micro sized delta, with quite modest power requirements the connectors would have been a fire risk, from overheating due to too much current. Make sure everything is solidly connected, do not use solder to tin wires as it crumbles under the tension from the screws holding it eventually. Crimps however are useful.
Edited 2 time(s). Last edit at 04/04/2017 05:57AM by DjDemonD.
Simon Khoury
Co-founder of [www.precisionpiezo.co.uk] Accurate, repeatable, versatile Z-Probes
Published:Inventions
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