<![CDATA[SoliForum - 3D Printing Community — extruder, voltage at board]]> 2014-01-02T22:34:03Z PunBB https://www.soliforum.com/topic/4961/extruder-voltage-at-board/ <![CDATA[Re: extruder, voltage at board]]> Well, I bit the bullet and ordered a new board.I was checking my purchase history and so far since I had my SD3  I bought over 400.00 worth of replacement parts.I didn't know cost of ownership would be that high for just one year.On a positive note, the squeaky wheel does get the grease.SD called me back and assured me of prompt shipment.

]]> https://www.soliforum.com/user/574/ 2014-01-02T22:34:03Z https://www.soliforum.com/post/45597/#p45597 <![CDATA[Re: extruder, voltage at board]]> Oh well, still no good. voltage is itermittent. Can I use an external 12v just for the extruder?

]]> https://www.soliforum.com/user/574/ 2013-12-29T02:12:08Z https://www.soliforum.com/post/45314/#p45314 <![CDATA[Re: extruder, voltage at board]]> As I was measuring the voltage on the mosfet, (about 5v) I jumped over to extruder pins and now have 12v again. Got me baffled.

]]> https://www.soliforum.com/user/574/ 2013-12-28T01:02:45Z https://www.soliforum.com/post/45267/#p45267 <![CDATA[Re: extruder, voltage at board]]> don't measure them 'across', measure with respect to ground... one lead to ground one lead to pin.

ooops, I am talking about the pins on the mosfets.

]]> https://www.soliforum.com/user/296/ 2013-12-27T20:30:21Z https://www.soliforum.com/post/45254/#p45254 <![CDATA[Re: extruder, voltage at board]]> ronsii wrote:

The pin(mosfets) closest to the power(12V) in connection is the gate so turning on/off heat in RH should show up on this pin.

12v? I'll check that.

umm now I lost 12v across the pins again after reattaching the board to the case.

]]> https://www.soliforum.com/user/574/ 2013-12-27T19:24:48Z https://www.soliforum.com/post/45249/#p45249 <![CDATA[Re: extruder, voltage at board]]> The pin(mosfets) closest to the power(12V) in connection is the gate so turning on/off heat in RH should show up on this pin.

]]> https://www.soliforum.com/user/296/ 2013-12-24T07:36:31Z https://www.soliforum.com/post/45058/#p45058 <![CDATA[Re: extruder, voltage at board]]> I took the board off the back and was checking solder connections, all looked good. Then while it was loose I rechecked the voltage again. Low and behold , now I have 12v across the pins.Go figure  . smile

]]> https://www.soliforum.com/user/574/ 2013-12-24T06:44:46Z https://www.soliforum.com/post/45057/#p45057 <![CDATA[Re: extruder, voltage at board]]> Probably the mosfet is bad or a solder joint between it and the headers

edit: do you get a trigger voltage to the mosfet?

]]> https://www.soliforum.com/user/296/ 2013-12-24T06:21:59Z https://www.soliforum.com/post/45055/#p45055 <![CDATA[extruder, voltage at board]]> I have been trying to troubleshoot my hotend issue. I found a working heater( works outside SD) From this picture I am assuming there should be 12v across  the 2 pins. Is that correct? If so I am not getting anything but I do get 12v from one pin to ground.The wiring harness is ok as I get same results at the extruder motor end.( credit to mohamd for pic)

]]> https://www.soliforum.com/user/574/ 2013-12-24T04:14:22Z https://www.soliforum.com/post/45050/#p45050