<![CDATA[SoliForum - 3D Printing Community — Bed stays heated, even when printer is off]]> https://www.soliforum.com/topic/10180/bed-stays-heated-even-when-printer-is-off/ Wed, 04 Mar 2015 05:02:50 +0000 PunBB <![CDATA[Re: Bed stays heated, even when printer is off]]> https://www.soliforum.com/post/88192/#p88192 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?

]]> Wed, 04 Mar 2015 05:02:50 +0000 https://www.soliforum.com/post/88192/#p88192 <![CDATA[Re: Bed stays heated, even when printer is off]]> https://www.soliforum.com/post/88130/#p88130 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.

]]> Tue, 03 Mar 2015 20:43:27 +0000 https://www.soliforum.com/post/88130/#p88130 <![CDATA[Re: Bed stays heated, even when printer is off]]> https://www.soliforum.com/post/87684/#p87684 If the FET is the issue, is there an easy fix? Does SD need to send me a new mobo? Can I adjust anything?

]]> Sun, 01 Mar 2015 06:52:43 +0000 https://www.soliforum.com/post/87684/#p87684 <![CDATA[Re: Bed stays heated, even when printer is off]]> https://www.soliforum.com/post/87654/#p87654 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.

]]> Sat, 28 Feb 2015 21:47:39 +0000 https://www.soliforum.com/post/87654/#p87654 <![CDATA[Re: Bed stays heated, even when printer is off]]> https://www.soliforum.com/post/87645/#p87645 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

]]> Sat, 28 Feb 2015 20:13:21 +0000 https://www.soliforum.com/post/87645/#p87645 <![CDATA[Re: Bed stays heated, even when printer is off]]> https://www.soliforum.com/post/87638/#p87638 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.

]]> Sat, 28 Feb 2015 19:24:43 +0000 https://www.soliforum.com/post/87638/#p87638 <![CDATA[Re: Bed stays heated, even when printer is off]]> https://www.soliforum.com/post/87608/#p87608 pshcims wrote:

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

The hot end...

]]> Sat, 28 Feb 2015 13:21:00 +0000 https://www.soliforum.com/post/87608/#p87608 <![CDATA[Re: Bed stays heated, even when printer is off]]> https://www.soliforum.com/post/87601/#p87601 I have contacted SD and await a reply

]]> Sat, 28 Feb 2015 06:12:42 +0000 https://www.soliforum.com/post/87601/#p87601 <![CDATA[Re: Bed stays heated, even when printer is off]]> https://www.soliforum.com/post/87591/#p87591 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.

]]> Sat, 28 Feb 2015 04:20:43 +0000 https://www.soliforum.com/post/87591/#p87591 <![CDATA[Re: Bed stays heated, even when printer is off]]> https://www.soliforum.com/post/87562/#p87562 Sounds like a failed FET to me.

]]> Sat, 28 Feb 2015 00:57:19 +0000 https://www.soliforum.com/post/87562/#p87562 <![CDATA[Re: Bed stays heated, even when printer is off]]> https://www.soliforum.com/post/87557/#p87557 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.

]]> Sat, 28 Feb 2015 00:22:34 +0000 https://www.soliforum.com/post/87557/#p87557 <![CDATA[Re: Bed stays heated, even when printer is off]]> https://www.soliforum.com/post/87549/#p87549 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?

]]> Sat, 28 Feb 2015 00:00:52 +0000 https://www.soliforum.com/post/87549/#p87549 <![CDATA[Re: Bed stays heated, even when printer is off]]> https://www.soliforum.com/post/87459/#p87459 Skyblue, can you clarify where these items are, where the aluminum block is?

]]> Fri, 27 Feb 2015 14:36:09 +0000 https://www.soliforum.com/post/87459/#p87459 <![CDATA[Re: Bed stays heated, even when printer is off]]> https://www.soliforum.com/post/87457/#p87457 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?

]]> Fri, 27 Feb 2015 14:29:51 +0000 https://www.soliforum.com/post/87457/#p87457 <![CDATA[Re: Bed stays heated, even when printer is off]]> https://www.soliforum.com/post/87452/#p87452 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...

]]> Fri, 27 Feb 2015 13:56:48 +0000 https://www.soliforum.com/post/87452/#p87452