Unfortunately, that didn't resolve it for me, I'm going to be honest, for $140 - I was hoping for something a little bit better than this. Heat creep and extruder issues. It's the fourth time I've had to disassemble this beast to clear a clog for PLA. Went from 185 all the way up to 225 Celsius on the hot end temperature, adjusted vref on my SKR e3 mini v2.0. Still the same issue as above, I can confirm that the print job starts out beautifully, but sometime after 6 hours of printing, the extruder dies and stops extruding or retracting altogether. Gears checked with magnifying glass via the troubleshooting video provided, no visual artifacts and expected movement. Honestly - it's as if the extruder motor dies during the print job. I have taken the liberty to order a replacement motor and will test further - but I'm not sure if I'll stick with this hotend at this rate. EDIT: After the fourth clear and confirmation of the motor dying when the clog applies, I have removed this from the printer and removing this from my recommended list for my students. This expensive atrocity has been an absolute nightmare, from a broken thermistor wire out of the box, to an aluminum body wrought with problems mounting and snapping pieces off, then this? Sorry - I just can't recommend this for everyday and professional printers. Thanks E3D, please enjoy the money I "donated" - it won't happen again.
I have the same issue. Gears seems fine, but all bigger prints (more than 5 hour) fail with clogging issues. It really seems to be a heatcreap issue. Running standard fan, adjusted volts, tried a lot of combinations of retraction and retraction speed (0.2mm and speed from 20 to 40 mm/s). Does anyone have a solution of idea?
It's not heat creep, for some reason it's either a crap motor sold with the unit, or a badly manufactured gear. I purchased a separate motor from MatterHackers and the problem was gone, for a week - then the same thing happened again. Tested both motors and verified voltages in the firmware - and then multimetered the motors. Current is grounded out somewhere in the motor, seems to happen under duress. For the price of the unit, I can't help but feel like I got duped.
Did anybody ever figure out this issue? I seem to have the same problem. I normally (always lately) print ABS but shortly after I got the Hemera I put in some new PLA and started a print. About 3-4 hours later I started hearing a slight noise, getting closer to the printer it sounded like the extruder was skipping. I tore the Hemera apart to find nothing except a filament with a glob on the end of it. I put it back together and repeated the print and the same thing happened. Tore apart again same blob on end of the filament. Kinda looked like it was being jammed into a small hole and just kept squishing together trying to feed but not. At that time I was pissed and didn't want to have to dismantle it again so I went back to ABS and have been printing for months without issue. Last night I decided to print an Eagle in this bronze PLA I have. Started the print and about 4 hours later my duet mag filament sensor triggered (occasionally false triggers), I cleared it and resumed the print and it started printing again. Later when it completed I went and looked and it had quit extruding about 3/4 of the way through the print but then at some point it started extruding again because there was some spaghetti left in the printer that should have been that top 1/4. So tonight I decide to try the same model as last night in PLA again,, 4 hours into the print I hear the same sound (my printer is close to where I sit) Get up and look and there it is going through the motions but making the skipping extruder sound. I checked my gears when I first got the Hemera and again when it clogged on me when I first tried PLA. I'm not sure where to go from here...
Just signed up to add a +1 to the enclosure thing. I had weird slow jams when printing slow that I couldn't explain. Under extrusion which turned into no extrusion but I could perfectly extrude later (after cooldown). But only with certain PLA's (eSun was the worst) yet, it only ever happened when the enclosure was closed. If you're getting weird jams with PLA, try opening up the enclosure and see if it makes a difference.
Same issue as above, the hemera starts skipping and not extruding a few hours into a print. The gears are clicking. Sometimes it will continue to extrude after some time, only for the issue to reoccur. The printer is without enclosure. I've completely taken the Hemera apart, checked gears, removed thermal paste and applied new one. Cleaned the nozzle, did a cold pull. Upped the extruder current to 1000 on the Ezboard. Still have no idea, what value is useful, since there seems to be some formula, though it's unclear which one is beeing used for the TMC2208 drivers. Standard fan runs at full speed. Retraction: 0,8mm @ 25mm/s PLA @ 200, bed @ 60. Print speeds around 40-60mm/s
Had the very same problem. In my case was heat creep. Disassembled the Hemera, checked all gears (no damage/imperfections), cleaned and greased them. Then I removed the heatbreak and re-applied the thermal paste (a fair bit more than I had when I first assembled it). Tried again the same object that failed a dozen times or so during my tests - with the same PLA - and it was successful. Printed at 80mm/s (top speed for inner walls and infill), 210 degrees, 1mm retraction. I used the retraction since the previous failed attempts were failing sooner if the retraction was on. Hopefully it will keep working now. I have to say that I was expecting a product less prone to total failures due to really minimal changes like this. My previous crappy Sidewinder X1 extruder never failed even with 30+ hours prints.
I am literally tired of this product. I bought this product to achieve consistency. But now it is one of my black holes.I bought it, I had many "successfull" prints. Sometimes I run into my old prints at home and I notice even the stock was printing better. Anyhow I am spending more time than a stock extruder. Literally I come to the point where I quit. I am thinking of going back to knock of hardware which required less maintenance. Now I have an SLA printer which I am happy to print with and for me for detailed work you go yo SLA but if you need volume strength etc you go to FDM. The only purpose I bought this extruder was consistency and it failed big time. From this point on I literally dont have any motivation any more.
