SoliForum - 3D Printing Community — very odd extruder temp problem

Re: very odd extruder temp problem

2014-02-25T05:44:09Z

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

Re: very odd extruder temp problem

2014-02-25T04:58:54Z

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..

Re: very odd extruder temp problem

2014-02-25T04:53:16Z

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 ?

Re: very odd extruder temp problem

2014-02-25T02:21:37Z

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.

Re: very odd extruder temp problem

2014-02-24T23:12:41Z

There were no errors in the log when it happened

Re: very odd extruder temp problem

2014-02-24T22:56:44Z

That looks ok. Anything in the RH log?

Re: very odd extruder temp problem

2014-02-24T22:42:50Z

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

Re: very odd extruder temp problem

2014-02-24T22:33:22Z

Post the start of your gcode.

Re: very odd extruder temp problem

2014-02-24T21:45:12Z

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.

Re: very odd extruder temp problem

2014-02-19T05:33:03Z

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.

Re: very odd extruder temp problem

2014-02-19T05:15:49Z

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

very odd extruder temp problem

2014-02-19T04:53:48Z

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.