halfway temperature drop

[roald 2]

since a few days my ultimaker original starts with a temperature drop at layer 3 and it drops from 220 degrees to 200 degrees Celsius and ruin a few layers. after layer 11 the temperature stabilize and the other layers going well.

things i have already try to solve the problem:

restart windows pc

re-install cura

try another usb port

drive from a mac pc (with a older version of cura)

disconnect the printer for 2 hours

check the cables on the board and print head

expand the distance about the power cables from the heated bed and the signal cable from the temperature sensor

 

[gr5 2,266]

It's almost surely the fan. That's about where the fan usually comes on. It takes a minute for the PID controller to recover.

You can see the fan settings and "advanced" menu.

There's lots of solutions - none of them perfect:

1) Have the fan come on more gradually - I think the default is 100% at 5mm height.

2) Print hotter the first few layers until the fan comes on (240 is good - strongly recommend not to go over 240C for PLA though).

3) On layer 2, push on the fans to get them going. This way they start sooner but more slowly.

4) Don't use any fan. I don't recommend this. Fan helps SO MANY ISSUES!

 

[roald 2]

gr 5 your right the temperature drop was a result about the fan start.

i have try the same print without fan and now the temperature line is smooth at 220 degrees.

but the problem isn't solve, now i think the problem is in the feeder.

a month earlier i have crush the feeder part maybe my bolt was too long.

good part:

 

mine part

do you think it make sense if it is broken or not? in mine opinion not the nut stay also with a broken part in place.

 

[gr5 2,266]

Wow. Maybe you should print this one or similar?

http://www.thingiverse.com/thing:26094

 

[roald 2]

i have try with and without fan.

tightening and loose the screw on the extruder tensioner.

try print with different temperatures with the printhead as well with the platform.

nothing helps, my ultimaker is more broken than drive :(

i try to order a new part for the one is broken on my extruder at ultimaker.

the thing that i will ask, is it normal that there is a FLASHING red led (see picture #1) on the board when the printer drive.

because the other led (see picture #3) is only burn red not flashing.