<![CDATA[SoliForum - 3D Printing Community — Bed stays heated, even when printer is off]]> 2015-03-04T05:02:50Z PunBB https://www.soliforum.com/topic/10180/bed-stays-heated-even-when-printer-is-off/ <![CDATA[Re: Bed stays heated, even when printer is off]]> scruffybob wrote:

I had exactly the same problem, so this doesn't look like an isolated problem.   Solidoodle elected to RMA the entire unit instead of trying to send parts.   Took a month to get the RMA, but it's their problem to fix now.

That's disappointing. Everything else is now working fine. Did you ask for parts? Are they sending a different unit, or did you get a refund?

]]> https://www.soliforum.com/user/9811/ 2015-03-04T05:02:50Z https://www.soliforum.com/post/88192/#p88192 <![CDATA[Re: Bed stays heated, even when printer is off]]> I had exactly the same problem, so this doesn't look like an isolated problem.   Solidoodle elected to RMA the entire unit instead of trying to send parts.   Took a month to get the RMA, but it's their problem to fix now.

]]> https://www.soliforum.com/user/9013/ 2015-03-03T20:43:27Z https://www.soliforum.com/post/88130/#p88130 <![CDATA[Re: Bed stays heated, even when printer is off]]> If the FET is the issue, is there an easy fix? Does SD need to send me a new mobo? Can I adjust anything?

]]> https://www.soliforum.com/user/9811/ 2015-03-01T06:52:43Z https://www.soliforum.com/post/87684/#p87684 <![CDATA[Re: Bed stays heated, even when printer is off]]> it's definitely a burned up MOSFET. if the resistor failed I would expect the circuit to be open, not closed. regardless, i have never seen a pulldown/pullup resistor fail that wasn't my fault.

]]> https://www.soliforum.com/user/7321/ 2015-02-28T21:47:39Z https://www.soliforum.com/post/87654/#p87654 <![CDATA[Re: Bed stays heated, even when printer is off]]> albc3d wrote:
elmoret wrote:

Sounds like a failed FET to me.

FET is probably good.  Haven't looked at the circuit, but perhaps a bad pull down resistor at the gate?  I wonder if the controller output is pulling it up.  Does the temperature stabilize at the set temperature?  Anyway, definitely should contact SD.  Hopefully they'll be prompt.

What makes you think the FET is fine? Pull down resistors don't typically just fail. Underrated or counterfeit FETs (remember this was assembled in China with little to no QC) can definitely fail on. FETs generally fail on, not open.

http://www.richieburnett.co.uk/mosfail.html

]]> https://www.soliforum.com/user/221/ 2015-02-28T20:13:21Z https://www.soliforum.com/post/87645/#p87645 <![CDATA[Re: Bed stays heated, even when printer is off]]> Skyblue wrote:
pshcims wrote:

Skyblue, can you clarify where these items are, where the aluminum block is?

The hot end...

I edited my post. The extruder is actually fine. It's the bed which is the issue.

]]> https://www.soliforum.com/user/9811/ 2015-02-28T19:24:43Z https://www.soliforum.com/post/87638/#p87638 <![CDATA[Re: Bed stays heated, even when printer is off]]> pshcims wrote:

Skyblue, can you clarify where these items are, where the aluminum block is?

The hot end...

]]> https://www.soliforum.com/user/614/ 2015-02-28T13:21:00Z https://www.soliforum.com/post/87608/#p87608 <![CDATA[Re: Bed stays heated, even when printer is off]]> I have contacted SD and await a reply

]]> https://www.soliforum.com/user/9811/ 2015-02-28T06:12:42Z https://www.soliforum.com/post/87601/#p87601 <![CDATA[Re: Bed stays heated, even when printer is off]]> elmoret wrote:

Sounds like a failed FET to me.

FET is probably good.  Haven't looked at the circuit, but perhaps a bad pull down resistor at the gate?  I wonder if the controller output is pulling it up.  Does the temperature stabilize at the set temperature?  Anyway, definitely should contact SD.  Hopefully they'll be prompt.

]]> https://www.soliforum.com/user/9495/ 2015-02-28T04:20:43Z https://www.soliforum.com/post/87591/#p87591 <![CDATA[Re: Bed stays heated, even when printer is off]]> Sounds like a failed FET to me.

]]> https://www.soliforum.com/user/221/ 2015-02-28T00:57:19Z https://www.soliforum.com/post/87562/#p87562 <![CDATA[Re: Bed stays heated, even when printer is off]]> pshcims wrote:
IronMan wrote:

If you unplug the printer completely (from your computer and wall outlet) and then plug it back in, will it heat everything without turning on the power button?

YES, I just tested. I plugged it in without turning it on, and the bed started to get hot. Any ideas what I can do?

You can contact SD and start a ticket with them.  There is nothing safe or normal about what you are experiencing.

]]> https://www.soliforum.com/user/2291/ 2015-02-28T00:22:34Z https://www.soliforum.com/post/87557/#p87557 <![CDATA[Re: Bed stays heated, even when printer is off]]> IronMan wrote:

If you unplug the printer completely (from your computer and wall outlet) and then plug it back in, will it heat everything without turning on the power button?

YES, I just tested. I plugged it in without turning it on, and the bed started to get hot. Any ideas what I can do?

]]> https://www.soliforum.com/user/9811/ 2015-02-28T00:00:52Z https://www.soliforum.com/post/87549/#p87549 <![CDATA[Re: Bed stays heated, even when printer is off]]> Skyblue, can you clarify where these items are, where the aluminum block is?

]]> https://www.soliforum.com/user/9811/ 2015-02-27T14:36:09Z https://www.soliforum.com/post/87459/#p87459 <![CDATA[Re: Bed stays heated, even when printer is off]]> If you unplug the printer completely (from your computer and wall outlet) and then plug it back in, will it heat everything without turning on the power button?

]]> https://www.soliforum.com/user/131/ 2015-02-27T14:29:51Z https://www.soliforum.com/post/87457/#p87457 <![CDATA[Re: Bed stays heated, even when printer is off]]> I had that issue, noticed the heating resistor in the aluminum block was loose, re-centered the resistor, tightened the set screw, and issue has not re-occurred.  Set screw is on bottom of block, also check thermistor set screw...

]]> https://www.soliforum.com/user/614/ 2015-02-27T13:56:48Z https://www.soliforum.com/post/87452/#p87452