Extruder temperture

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precisionpete
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Posts: 115
Joined: Mon Mar 31, 2014 4:53 pm

Extruder temperture

Post by precisionpete »

Going through the machine again to get printing I found a problem that I am not sure how to correct.

Hot end is E3D V6

Getting ready to print T-Glase with Bed at 60 C and Extruder set to 215C
Orion LCD panel reads set points correctly.

Bed goes to 60C and I measure within 1 degree with hand held non contact thermometer

Extruder temp with the thermometer is reading temperature exactly but in degrees F

So instead of 215C I am getting 215F

I know the thermometer isn't that accurate but it is close enough to tell me I have a problem.

Before I delve into the firmware for the hot end settings any thoughts?

Thanks,
Pete
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Eaglezsoar
ULTIMATE 3D JEDI
Posts: 7159
Joined: Sun Apr 01, 2012 5:26 pm

Re: Extruder temperture

Post by Eaglezsoar »

It sounds as if you have the wrong thermistor in your hotend.
Let the printer cool down so that every thing is a room temperature.
Hopefully you have a half decent meter that can read ohms.
The resistance of the hotend thermistor should be approximately 100K when you measure its leads with the ohm-meter.
Please report back with the value you read.
By the way the thermistor for the hotend should be unplugged from the Rambo when measuring.
precisionpete
Printmaster!
Posts: 115
Joined: Mon Mar 31, 2014 4:53 pm

Re: Extruder temperture

Post by precisionpete »

Hi again :)
Yes I do have a good ohm meter. I'll take apart and measure.

Weird because apparently it was printing pla until I just updated the PID using matter control.
Forgot that important tidbit of info.
For info here was the old values and then new values I input after PID tuning.
Old:
P 31.36
I 2.18
D 112.9
New E3d hot end
P17.27
I 2.61
D 28.54
Not sure if that helps.
I'll take her apart and measure the thermistor ohms.
Thanks for the quick reply again Eaglezsoar.
precisionpete
Printmaster!
Posts: 115
Joined: Mon Mar 31, 2014 4:53 pm

Re: Extruder temperture

Post by precisionpete »

Thermistor reads 100K ohms unplugged.

I still measure EXACTLY deg F on the hot end with the non contact thermometer instead of deg C.

Thoughts?

Thanks,
Pete
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