Power Supply
Most Reprap electronics use 12V DC ranging from 5A-20A.
The motors plus single hotend take up to 5A or so, a heated bed typically takes 5A-15A. So for a standard setup with heated bed, look to about 18-20A total which is about 220-240W at 12V. For some setups you might be able to use less power.
There are several different options of power supply that can be used and are commonly available.
Contents
Computer PSUs
Standard PC
These provide 12V, 5V and 5V standby.
A PSU from a standard PC can be used. Some electronics have connectors for direct connection to the PSU Molex connectors, for other electronics the connectors will need to be cut and connection to stripped wires made. Some electronics can use the Power-On signal to wake up the PSU from standby.
- PCPowerSupply using a computer power supply
Server PSU
There are also PSUs taken from servers which can be used. These usually provide 12V only.
TODO: wiring
Brick type
General purpose power bricks
These come in a variety of types up to around 240W, for normal use select a 12V 220W version. Also available are 24V versions.
They often come with a barrel type or 4 pin connector. The 4 pin connector is sometimes called "mini-DIN" or "power DIN", but is not a standard DIN connector.
Also the pin assignments can vary, but for most boards you will need to cut the connector off or make an adaptor.
References: http://en.wikipedia.org/wiki/DC_connector#Snap_and_lock_DC_power_connectors
XBOX 360 PSU
There are several versions, choose the 203W version. Note that the power may be insufficient for some heated beds. The PSU will shutdown if an overload occurs.
These provide 12V, 5V and 5V standby and power on input.
The XBOX power connector can be cut off and connections made to stripped wire, or make an adaptor with an XBOX power socket (sold as spares on eBay etc).
http://www.thingiverse.com/thing:13980
OEM type PSU
These are designed to be wired into custom installations. They have exposed mains connections which should be enclosed to prevent access. It is recommended to get closed frame types, but these still have exposed mains connections.
They come in several versions, 12V or 24V and up to 400W.
The input voltage is usually universal, switchable between 110V and 220V, or sometimes fixed 110V or 220V. Check that it is compatible with your mains voltage before purchasing.
Suppliers
Vendors (link to product) | Shipping location | Manufacturer | Model # (link to datasheet) | Input | Output(V/A) | Tested | Additional notes |
lulzbot | USA | MW | S-240-12 | 110V or 220V | 12V 20A | true |