Getting Annoyed With My ROC35 Machine Again
So my ROC35 suddenly started acting like a grumpy old man last Tuesday. Wouldn’t calibrate properly before printing, kept spitting out these weird error codes – E7, E9, you name it. And this funky burning plastic smell? Freaked me right out. Figured enough’s enough, time to roll up my sleeves.
My Step-by-Step Fixing Adventure
First things first, powered it off completely like restarting a frozen phone. Pulled that plug hard, waited a solid two minutes – none of that quick unplug/replug nonsense. Turned it back on… still throwing E7 errors. Ugh.
Decided to play doctor and opened the back panel. Looked like a dust bunny convention in there! Got my little handheld vacuum and went to town. Used a dry toothbrush for those stubborn corner gunk piles. Surprisingly nasty stuff fell out.
Reassembled everything, ran calibration… got halfway then BEEP BEEP BEEP! Now showing E9 code. Felt like kicking the dang thing but remembered that warranty sticker. Took five deep breaths instead.
The Real Fix That Actually Worked
Grabbed my backup nozzle kit – found this cheap third-party pack. Followed these steps:
- Removed the old nozzle with that tiny wrench (almost dropped it twice!)
- Used that pipe cleaner thingamajig to scrub the inside tube
- Put in the new nozzle super carefully – hand-tight only!
- Reset the nozzle counter in settings like that YouTube dude said
Pressed calibrate again… silence for five seconds. Then that beautiful humming sound! Ran a test print and finally got that smooth, clean line I’ve been missing for weeks. Felt like winning the lottery.

What I Learned The Hard Way
Turns out I’d been messing up basic maintenance like an idiot. Three big takeaways:
- Stop ignoring error codes. That E7 was screaming about nozzle problems months ago
- Cheap nozzles wear out fast. My fault for buying those $3 bargain bin specials
- Cleaning isn’t optional. That dust was practically growing roots in there
Seriously thought about getting a new machine after the fourth failure. But turns out the ROC35 just needs regular TLC like an old car. Saved myself like $300 bucks fixing it myself. Win!