how do i wire my psu to my heated bed

hi noobie here lol

just wondering how i would wire up a [www.ebay.co.uk]

to my heat bed not sure were the wires go.from the bed to the unit

Are you serious running a 3d printer with heated bed at 20a psu? Also are you sure to wire up the heated bed directly to the psu?

2 things about my questions above
1. Heated bed can pull up to around 15a during heat up depending on the wire length and its size
2. Heated bed will heat up and continue to burn itself the moment you turn on that psu and thus will melt/burn your heated bed. (an analogy, pressing the gas to the floor when starting engine without letting it go)

Quote
sarf2k4
Are you serious running a 3d printer with heated bed at 20a psu? Also are you sure to wire up the heated bed directly to the psu?

2 things about my questions above
1. Heated bed can pull up to around 15a during heat up depending on the wire length and its size
2. Heated bed will heat up and continue to burn itself the moment you turn on that psu and thus will melt/burn your heated bed. (an analogy, pressing the gas to the floor when starting engine without letting it go)

I have never heard such a BS...

This 200W PSU is easily able to power a common 100W heated bed. ( 8.3Amps @12V )

Back to the question:
Many people power their heated bed directly from the PSU, but they use a relais switched by the controller ( RAMPS, or whatever ) to keep the desired temperature.
Just wire the relais to the heat-bed port and the thermistor to the appropriate temp-probe connector.
Then use bang-bang mode or slow PWM in your firmware and you´re done.
-Olaf

thanks i give that a try

Quote
o_lampe

Quote
sarf2k4
Are you serious running a 3d printer with heated bed at 20a psu? Also are you sure to wire up the heated bed directly to the psu?

2 things about my questions above
1. Heated bed can pull up to around 15a during heat up depending on the wire length and its size
2. Heated bed will heat up and continue to burn itself the moment you turn on that psu and thus will melt/burn your heated bed. (an analogy, pressing the gas to the floor when starting engine without letting it go)

I have never heard such a BS...

This 200W PSU is easily able to power a common 100W heated bed. ( 8.3Amps @12V )

Back to the question:
Many people power their heated bed directly from the PSU, but they use a relais switched by the controller ( RAMPS, or whatever ) to keep the desired temperature.
Just wire the relais to the heat-bed port and the thermistor to the appropriate temp-probe connector.
Then use bang-bang mode or slow PWM in your firmware and you´re done.
-Olaf

thank you i give it a try

Well, I only assume that the TS doesn't have an idea to use relay or something

thanks guys have my heater bed wired and working now