HE280 question

[barry99705]

Got home from MRRF Sunday this morning at 1:30-sh am. Woke up and upgraded my Max's hot end. It's all wired up and seems to be working, but is the hot end fan supposed to run all the time?

[Dale Eason]

Yes. They needed an extra wire for the sensor and so stole it from the fan and then connected the fan up to power so that it would always run.
Dale

[barry99705]

Cool! Now I just need to figure out how to make it stop vibrating...

[Mac The Knife]

You can run an extra wire and have it controlled,,,, Here's Mhackney's post http://forum.seemecnc.com/viewtopic.php ... 6&start=75

[barry99705]

I'd have to take it apart again!

[Mac The Knife]

If you had done your homework,,,,,,

[barry99705]

Swapped out the fan with one of the others. Still whistles, but it's not vibrating, I can handle that. With the door of the enclosure closed it's not too bad.

[barry99705]

Wow this thing jams easy!

[Dale Eason]

That usually means one of two things. You have the retraction too big when using abs or you did not get the bowden tube seated properly. Usually it is the latter.

Dale

[barry99705]

Yea, I think it was the bowden. I have a flying extruder, and the bowden I had with the E3d before was probably an inch too short, so it was pulling on the hot end. I cut a new piece and installed it after I got the clog out. I even used Andy's trick of unscrewing the bowden connector a couple turns, insert the tube, then tighten it back. The new tube should help I think.

[barry99705]

I'm starting to not like this hot end....

Code: Select all

22:19:08.984 : Error:One heater seems decoupled from thermistor - disabling all for safety!
22:19:08.984 : Error:Temp. raised to slow. Rise = -1.93 after 46027 ms
22:19:25.508 : extruder 0: working
22:19:25.508 : heated bed: working
22:19:25.508 : Error:Printer set into dry run mode until restart!
22:19:27.686 : extruder 0: working
22:19:27.686 : heated bed: working
22:19:27.689 : Error:Printer set into dry run mode until restart!
22:19:28.170 : extruder 0: working
22:19:28.170 : heated bed: working
22:19:28.174 : Error:Printer set into dry run mode until restart!
22:19:50.064 : extruder 0: working
22:19:50.064 : heated bed: working
22:19:50.069 : Error:Printer set into dry run mode until restart!
22:19:50.069 : extruder 0: working

[thechewiestbacca]

Looks like a blown Thermal Safety Fuse. That happened to me, and that's the same error message I got

[barry99705]

I can reset the printer and it will work again though. I printed the whip clip Steve posted on repables just to make sure it wasn't a temp disconnect with the wires. It printed just fine. I tried printing the part that it errored out on, and it did it again, at layer 8 of 23. Could it be those janky crimps working loose when they get hot?

[barry99705]

https://goo.gl/photos/yj4c94gUPjmen4Nt7
Seems to be dieing off around the same place. Printed from the pc and from sd card, so not the connection between. Getting DEF for both temps. I've resliced it with each version, so I don't think it's the gcode.

[barry99705]

Took the whole thing apart and recrimped everything. Made it to layer 12 this time, but did the same thing.

Code: Select all

13:39:40.747 : Printing layer 12 of 34
13:43:47.506 : Error:One heater seems decoupled from thermistor - disabling all for safety!
13:43:47.507 : Error:Temp. raised to slow. Rise = -2.18 after 46027 ms

Can the fuses be intermittent?

[barry99705]

Turns out, the hotend is very susceptible to the part fans. I'm using the same effector as my e3d which has 3 built in axial fans. I think the new hotend sticks down farther than the e3d did, so it's right in the path of the cooling air. Watching the temperature graph, when the fans kicked on, it would drop almost 15 degrees, and then trip the firmware.