Hey all,
I noticed a few weeks ago that my hot end temperature would sometimes vary wildly during my prints (target ~230, jumping between 210 and 250 sometimes in between a single reading) but it didn't always happen. It even caused some failed prints because it turned itself off at excessive temperatures. Well, it seems that I can't get a steady temperature now.
I figured that it must be my thermistor but I traded it with my bed one (which was having no issues) and that didn't work. I then turned on just the hot end and it heated up great - no variation whatsoever. The second I turn on my bed, though, the temperature varies like crazy. Ah ha! I'm not the best with electronics...but it must have something to do with the fact that they are both on.
It can't be that the temperature is actually varying that much, although when I turn the bed off and it goes back to normal the hot end has normally heated up quite a bit.
I have a prusa i2 with an arduino mega 2560 and ramps 1.4. 650 W power supply. A while ago I had two wires cross which blew one of the orange diodes so I took them out, soldered in some wires, then put fuses on the wires coming in from my power supply. Could something in that configuration be causing this? I'm so confused :S. Thank you for any input that you might have!
I noticed a few weeks ago that my hot end temperature would sometimes vary wildly during my prints (target ~230, jumping between 210 and 250 sometimes in between a single reading) but it didn't always happen. It even caused some failed prints because it turned itself off at excessive temperatures. Well, it seems that I can't get a steady temperature now.
I figured that it must be my thermistor but I traded it with my bed one (which was having no issues) and that didn't work. I then turned on just the hot end and it heated up great - no variation whatsoever. The second I turn on my bed, though, the temperature varies like crazy. Ah ha! I'm not the best with electronics...but it must have something to do with the fact that they are both on.
It can't be that the temperature is actually varying that much, although when I turn the bed off and it goes back to normal the hot end has normally heated up quite a bit.
I have a prusa i2 with an arduino mega 2560 and ramps 1.4. 650 W power supply. A while ago I had two wires cross which blew one of the orange diodes so I took them out, soldered in some wires, then put fuses on the wires coming in from my power supply. Could something in that configuration be causing this? I'm so confused :S. Thank you for any input that you might have!