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Heatbed shuts off after a few seconds on

domtropen

Heatbed shuts off after a few seconds on
September 19, 2014 11:25PM

Registered: 10 years ago
Posts: 25

So I just got this device to work, but the heatbed shuts off uncontrollably. I noticed that it is the power going into the heatbed and not the heatbed itself. I'm building the Prusa i2, using ramps 1.4. ideas on where I can search for the problem.the software doesn't seem to tell it to shutoff so it doesn't seem like this is the problem. Ideas?

Edited 1 time(s). Last edit at 09/19/2014 11:26PM by domtropen.

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sheck626

Re: Heatbed shuts off after a few seconds on
September 19, 2014 11:43PM

Registered: 12 years ago
Posts: 187

What kind of PSU are you using? It sounds like it's being overloaded either because it's inadequate or there's a short. The other likely causes are loose terminal connections, a bad MOSFET or a bad solder joint at the MOSFET. Be careful though, a loose connection could cause a fire.

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domtropen

Re: Heatbed shuts off after a few seconds on
September 20, 2014 01:49PM

Registered: 10 years ago
Posts: 25

Well to be fair, all my connections are secure, but shaking the wires that connect to the heat bed is probably loose, so I will check that, thanks!

Edited 1 time(s). Last edit at 09/20/2014 03:31PM by domtropen.

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domtropen

Re: Heatbed shuts off after a few seconds on
September 20, 2014 08:14PM

Registered: 10 years ago
Posts: 25

Update, well I found that the wire was loose but that wasn't the problem. It still shuts off rather quickly

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domtropen

Re: Heatbed shuts off after a few seconds on
September 20, 2014 09:01PM

Registered: 10 years ago
Posts: 25

Update: I installed a fan to see if the heating would be the problem but it isn't the problem. I think it may be a short on the ramps. Any way to check this?

Edited 1 time(s). Last edit at 09/20/2014 09:01PM by domtropen.