1 Topic by satman49

  • satman49
  • Member
  • Offline
  • From: virginia
  • Registered: 2012-12-28
  • Posts: 867

Topic: very odd extruder temp problem

The extruder and bed reach proper temps,but when I hit run, it will run the first layer ok. Problem is, then  the extruder temp starts dropping and  all stops due to cold extrusion error.The indicator on the heat extruder button is still on tho.I have updated the firmware for the E3D, looks nornal to me. I have even tried it on XP and win8.1 with several versions oF RH.
I did the autotune for the hotend and it seems to be ok.I'm just out of ideas.

SD3, E3D hotend,linear bearing on x/y axis',pillow block bearing on y conneting rod, ball bearngs on front y axis, fan on y stepper motor.

2 Reply by ronsii

  • ronsii
  • Member
  • Offline
  • From: PNW
  • Registered: 2012-10-28
  • Posts: 1,723

Re: very odd extruder temp problem

Could be a bad/intermittent connection to the hotend heater, do you have the means to check for current flow to the extruder heater?

3 Reply by satman49

  • satman49
  • Member
  • Offline
  • From: virginia
  • Registered: 2012-12-28
  • Posts: 867

Re: very odd extruder temp problem

I think I traced it to a loose thermistor wire. Going to rewire the whole thing tomorrow. LOL , got too much tape holding things together.

SD3, E3D hotend,linear bearing on x/y axis',pillow block bearing on y conneting rod, ball bearngs on front y axis, fan on y stepper motor.

4 Reply by satman49

  • satman49
  • Member
  • Offline
  • From: virginia
  • Registered: 2012-12-28
  • Posts: 867

Re: very odd extruder temp problem

I am having that same issue again., hit run and extruder temp falls off. Its not the wiring as I replaced  all that. It's that I don't have 12 v now at the pins on the board.It heats ok before I hit run tho.

SD3, E3D hotend,linear bearing on x/y axis',pillow block bearing on y conneting rod, ball bearngs on front y axis, fan on y stepper motor.

5 Reply by lawsy

  • lawsy
  • Moderator
  • Offline
  • Registered: 2012-08-13
  • Posts: 1,220

Re: very odd extruder temp problem

Post the start of your gcode.

lawsy's Website

6 Reply by satman49 (edited by satman49 2014-02-24 23:05:40)

  • satman49
  • Member
  • Offline
  • From: virginia
  • Registered: 2012-12-28
  • Posts: 867

Re: very odd extruder temp problem

OK

G21; set mm units
G28 ;home all axis
G90; set absolute coordinates
G92 E0; reset extruder distance
M104 S230; set extruder temp and start heating
G1 Z5 F300 ;move platform down 5mm
G1 X145 Y145 F3000 ; move to back right corner
M109 S230; wait for extruder temp to be reached
G1 Z[first_layer_height] F200 ;move platform close to nozzle
G1 E7; extruder anchor
G1 F3000; Set Feed rate for first move
G92 E0; reset extrusion distance

I have beeen using that for a while now,until this morning
edit: some  how it started working again , grimlins?  lol

SD3, E3D hotend,linear bearing on x/y axis',pillow block bearing on y conneting rod, ball bearngs on front y axis, fan on y stepper motor.

7 Reply by lawsy

  • lawsy
  • Moderator
  • Offline
  • Registered: 2012-08-13
  • Posts: 1,220

Re: very odd extruder temp problem

That looks ok. Anything in the RH log?

lawsy's Website

8 Reply by satman49

  • satman49
  • Member
  • Offline
  • From: virginia
  • Registered: 2012-12-28
  • Posts: 867

Re: very odd extruder temp problem

There were no errors in the log when it happened

SD3, E3D hotend,linear bearing on x/y axis',pillow block bearing on y conneting rod, ball bearngs on front y axis, fan on y stepper motor.

9 Reply by ronsii

  • ronsii
  • Member
  • Offline
  • From: PNW
  • Registered: 2012-10-28
  • Posts: 1,723

Re: very odd extruder temp problem

You need to post a pic of the temp graph as it will have enough data in it to determine if it is a software prob or other.

10 Reply by pirvan

  • pirvan
  • pirvan
  • Member
  • Offline
  • From: San Francisco
  • Registered: 2013-03-27
  • Posts: 1,797

Re: very odd extruder temp problem

He said the first layer prints OK, then it starts to drop.  Maybe there's something in the code after the first layer code.

Maybe something in the settings, like the Filament settings in Slic3r ?

To print or, 3D print, that is the question...
SD3 printer w/too many mods,  Printrbot Simple Maker Ed.,  FormLabs Form 1+
AnyCubic Photon, Shining 3D EinScan-S & Atlas 3D scanners...
...and too much time on my hands.

11 Reply by adrian (edited by adrian 2014-02-25 05:00:29)

  • adrian
  • Member
  • Offline
  • From: Canberra, Australia
  • Registered: 2013-01-15
  • Posts: 1,623

Re: very odd extruder temp problem

im betting its far more likely a loose connection/broken heater wire than any code/software issue.
I've had bad connections that only exist when the head is other than x/y home because of the differences in cable tensions..

12 Reply by pirvan (edited by pirvan 2014-02-25 05:48:10)

  • pirvan
  • pirvan
  • Member
  • Offline
  • From: San Francisco
  • Registered: 2013-03-27
  • Posts: 1,797

Re: very odd extruder temp problem

Then it should show up randomly, even during the first layer print right?  He coud test that by heating up the extruder, then while watching the temp curves, move the print head around the manually.  If it's a loose connection he should see it momentarily drop.

Not only that if it's a loose connection it would drop, then rise then drop, as the connection would be intermittent.  But this is not how he describes it.

"The extruder and bed reach proper temps,but when I hit run, it will run the first layer ok. Problem is, then  the extruder temp starts dropping and  all stops due to cold extrusion error.The indicator on the heat extruder button is still on tho."

I still think it's setting relegated, maybe something weird like this

http://www.soliforum.com/misc.php?action=pun_attachment&item=4735

Post's attachments

filament setting 1.jpg
filament setting 1.jpg 77.06 kb, file has never been downloaded. 

You don't have the permssions to download the attachments of this post.
To print or, 3D print, that is the question...
SD3 printer w/too many mods,  Printrbot Simple Maker Ed.,  FormLabs Form 1+
AnyCubic Photon, Shining 3D EinScan-S & Atlas 3D scanners...
...and too much time on my hands.