I had a dreaded clog of death last night on the H2D. Root cause appears to be PLA Support V2 getting transferred to the PLA hotend during printing. I’m going to assume it’s a fluke and monitor moving forward.
Regardless - had to swap the hotend and it was super EZ. I’m impressed with the clip system on the H2D that made it easy. I’m also happy I didn’t have to take apart the entire extruder… it’s wildly complicated vs my old X1Cs.
Question:
What calibration do you all do typically post hotend swap? Just a flow dynamics and standard calibration?
Pic - how I feel successfully changing the hotend on the new machine all by myself.
I have an A1, but after I change the hotend, I run the full calibration from the printer. I do the flow dynamics and standard if this is the first time that I have used that filament with that size nozzle.
Without going into too much detail, they have a bug, and I hope the new beta firmware will reduce PVA purging and nozzle temperature changes when switching filaments even using dual nozzles needs to be better.
Lets hope this is the fix:
6. Optimized the purging strategy
What calibration do you all do typically post hotend swap? Just a flow dynamics and standard calibration?
Yes:
Reassess the flow dynamics to determine if the value has changed and check the nozzle offset.
Thanks for the responses!
I redid calibration and nozzle offset, and flow.
Each cube now has a weird blob on the corner where I assume the print is starting.
Might need to recheck flow again? It was a .01 on the last nozzle but looked like a .035 after the nozzle swap.
The 0.35 value for PLA is within the normal range, and it’s only happening in one spot—which is quite strange. Did you run the black-and-white high-precision nozzle offset calibration?
I did indeed (I think you mean the vision encoder calibration). Also strange is both heads are doing it, not just the one. I checked after the first one just to verify my sanity.
Running a different model now. Maybe the STL is borked…
Thanks for the info mate. I ran this, and the blobs were still there on the corners. I ended up retuning the flow rate out of curiosity and the hotend changed slightly from the baseline. Once I updated that (wnd did the detailed calibration) the blob has resolved.
Thanks again for taking time to respond and give me some ideas to try. Appreciate this community!
Kind of related, I had an extruder clog that was my fault, did not let it cool between high and low temp materials. I thought it would be much harder to clear as its quite complex, but was pretty straight forward. You can clear most clogs by just removing the extruder filament guide which is easy to remove. The upper section is pretty easy as well, just be careful with the cable. Overall not as bad as I thought it would be.
