Print errors and failures (solidoodlesupport please help!!!!) (Page 1 of 2)

Look at your temp graph, I'm betting it shows spurious readings. Bad wiring between the thermistor(s) and the main board would be the culprit.

How would that fix the root problem? This has happened to him 4 times already. Come on now.

I did try recycling the SD and also tried using the reset button
on the SD command board... However, the error persisted...

I am currently at work... and do not have access to my machine,
but will retry it this evening...

I will look for temp spikes etc... and should the error occur again,
I will copy the full error display to help troubleshoot this....

I seriously hope this is not a thermistor problem as I have already
have been forced to replace it once....

Will try all suggestions and report back this evening....

Thank you!

Measuring the thermistor while connected will definitely skew the reading - you can ignore that!

(tl;dr)In most applications, one leg of the thermistor is grounded and the other is connected to the analog input of the micro and a fixed resistor to a voltage supply - when off, the voltage supply usually looks a bit like ground anyway (low resistance path for small currents through a discharged capacitor somewhere), so that resistor will appear in parallel with the thermistor and the resultant reading on the meter will be lower than the resistance of the thermistor.(/tl;dr)

Does anyone know what value thermistor is actually used? Is it 100kOhm (common, from looking at a lot of other similar printers and http://reprap.org/wiki/Thermistor) - in that case 117kOhm would be about 22 degrees C at a guess. Not sure what the 80-85kOhm recommendation in the test instruction means...

After trying to print again... Another failure.

I added some photos this time to try and help explain what is happening.
The extruder and hotbed had run for some time with no spikes or drops...
but once I started the print, it hardly had started printing layer 1 when
the temp on the extruder and caused the error again....

So is this a thermosistor issue?  How do I resolve this?

Thanks for the insight here!

'Mintemp' would trigger if the thermistor resistance suddenly increased a lot; i.e. open circuit connection. wardjr is likely quite right - try looking at the temp graph while (gently) wiggling all the thermistor connections / wires (particularly close to the hot end - mind your fingers if it's on!). The saw-shaped bit at the end of your hot-end temp graph looks just like an open circuit wobble fault would.

I would be taking the thermistor off completely and checking/redoing every connection anyway.

Well it is definitely a loose or bad wire somewhere.... but for the life of me, I can not figure out which one...
and where the short in the wire is....

Chasing your tail? Why? I called it in the very first reply.

Yes, all Solidoodles ship with thermistors taped to the nozzle.

e-mail [email protected]. They may be able to get you a replacement.

Probably because it isn't the thermistor, but rather the wiring between the thermistor and the main board. Just like I said in the very first reply.

I did all of that.... and it still did not work.... or was unable
to find the short... So I rewired from the thermistor to plug
and that seemed to cure the issue and the new thermistor
started working fine....

I did the PID tuning excercise... and get that all set.....

Powered everything off... brought it all back online...

Reheated the extruder.... came up to temp and stayed there fine...

So I did a test print... a small cube... build plate heated fine...
extruder heated fine.... got half way thru the print...

and started air printing.... the extruder for the filament stopped working....

Stopped the print.... looked everything over.... turned heat extruder back
on... waited for temp... and tried to manually feed the filament
with the controls.... and nothing.  No movement from the extruder at all....

NO errors at all... nothing... nothing in the log that indicates there was an
error... If I go to Printer/Printer Information.... does not show any errors received...

I feel like I am chasing ghosts here.... I get one thing fixed then it is something else....

And before you say it... yes I checked all the connections on the extruder motor...
nothing is loose... I tried using screwdriver and pushing wires... nothing... tried
flexing wires for shorts... nothing... checked the plugs at the back of the board... fine...

I have bed heat... extrude heat.... XYZ axis fine... but no extruder....

Of note...

I notice this... if I look at the wiring for my extruder control plug on back of machine....
Wiring from top to bottom is Blue Red Green Black

This is the OPPOSITE of the Z Axis right next to it...

So to see if the extruder motor was bad... I unplug Z (which seems to work fine) and flipped the plug
for the extruder around to match the Z axis and used manual control.... AND motor works just fine...

Flip it the correct way and plug it back into the extruder plug.... use manual control for extrude/retract  nothing... (yes the extruder is heated)  and nothing.....

So solidoodlesupport:

What are recommendations for checking now????  Cause I am at a complete loss....

I feel like I have a $900 doorstop at the moment....

Suggestions????????

cujo3131 at  yah00 dot com

Cujo   (who is confused and going to bed)

GGunner....

The solidoodle is in my computer area and on a surge protected power source....
I have the machine setting on a anti-static pad.... so not sure it is that...
I know it has been really dry here this winter... but it doesn't seem to be that.
And it doesn't seem to be anything else electrical in the house...

Just can't pin down the issue....

Matt