Does this hot end temperature curve look normal?
Unfortunately I did not closely watch the temperature curves when I got my Felix 2.0 because I went pretty much right away to SD card printing. So I cannot tell how it looked like when the Felix was new. After discovering this behavior, I watched it for about 20h of printing time now - normal prints, nothing special, rather moderate printing speed, different layer heights etc.
The strange thing is that the temperature control is accurate to something like ±1°C when printing small parts where the printer slows down so as to not exceed the minimal layer printing time. Also, the curve is smooth when there is no printing going on. However, I cannot force wrong temperature readings by manually moving the print head or jiggling the thermistor wires. The reported temperatures for the head and the bed are the same when cooled off.
My prints look fine so far, but I am a little bit worried by the high temperature variation.Unstable hot end temperature?
Unstable hot end temperature?
Felix 2.0->3.0dual * Repetier (host+firmware) * KISSlicer Pro, Simplify3D * Cubify Design
-
- Posts: 132
- Joined: Sat Jul 20, 2013 12:50 pm
- Location: Würzburg
Wow you had a hughe drop of 20°C in your curve;
Normally for me is about max 8°C dropping when starting a new layer.
Is your thermistor still locked in place?
Normally for me is about max 8°C dropping when starting a new layer.
Is your thermistor still locked in place?
Felix 2.0
E3D Kraken Hotend
3mm Glas bed
LED light bar upgrade
E3D Kraken Hotend
3mm Glas bed
LED light bar upgrade
Are you using the standard Marlin firmware? It has a built in code you can call from a terminal or repetier host to have it try to work out optimal PID values. You could let it run that, then print something to see if it's any better. If it is, you can write the new values to the EEPROM so they're saved.
__________________________________________
Andy Silverman, Technogeek in Seattle
Felix Tec4 Single-head
Andy Silverman, Technogeek in Seattle
Felix Tec4 Single-head
I cannot move the thermistor by hand at least. But it sticks out a bit and I don't know whether this is supposed to be this way.Bachgassenbande wrote: Is your thermistor still locked in place?
Felix 2.0->3.0dual * Repetier (host+firmware) * KISSlicer Pro, Simplify3D * Cubify Design
I tried to recalibrate the PID values but there was only a small effect if at all.andrewsi wrote:Are you using the standard Marlin firmware? It has a built in code you can call from a terminal or repetier host to have it try to work out optimal PID values. You could let it run that, then print something to see if it's any better. If it is, you can write the new values to the EEPROM so they're saved.
Felix 2.0->3.0dual * Repetier (host+firmware) * KISSlicer Pro, Simplify3D * Cubify Design
Wow! Even if I stop printing it looks not as flat with my printer. I suspect a bad thermal coupling between the thermistor and the hot end with my printer.Makron wrote:I have a Straight line..
Felix 2.0->3.0dual * Repetier (host+firmware) * KISSlicer Pro, Simplify3D * Cubify Design
-
- Posts: 132
- Joined: Sat Jul 20, 2013 12:50 pm
- Location: Würzburg
So the first part shows the behavior when printing without 2nd fan? And after that, was the fan running at different speeds (perimeter vs. infill), or where does the slow oscillation come from?Bachgassenbande wrote:Here is just a snapshot of my temperatures;
you see the influence when turning on the 2.fan
Felix 2.0->3.0dual * Repetier (host+firmware) * KISSlicer Pro, Simplify3D * Cubify Design
-
- Posts: 132
- Joined: Sat Jul 20, 2013 12:50 pm
- Location: Würzburg
1st part without fan (1st layer)
starting with the second layer the perimeters and infill was cooled with diffrent fan speeds.
As i printed two small identical parts....
Just printing a large part without 2nd fan ==> Temperature is stable +/-1°C not visible in the temp chart
starting with the second layer the perimeters and infill was cooled with diffrent fan speeds.
As i printed two small identical parts....
Just printing a large part without 2nd fan ==> Temperature is stable +/-1°C not visible in the temp chart
Felix 2.0
E3D Kraken Hotend
3mm Glas bed
LED light bar upgrade
E3D Kraken Hotend
3mm Glas bed
LED light bar upgrade