I've had my Core One kit built for a month now and I've been double checking everything because of sporadic major layer shifts and more recently the fan shroud falling off midprint after the screws vibrated themselves loose.

I removed the Nextruder to ensure the belts were attached evenly with the required 4-5 teeth and made sure the gantry was square and the tension within the suggested range using the onboard strobe method. During all this I noticed that there seemed to be significantly more fine black belt "dust" in the back right hand corner; after looking around it seems that the belt is sitting noticeably off center on the toothed motor pulley. I've taken a couple of pictures but without further dismantling it's hard to capture it dead on, I think the amount of visible toothed pulley is clear though.

I looked back over the kit assembly and there was no manual adjustment here, I just used the provided printed tool to act as a spacer while tightening the two grub screws onto the motor shaft so I'm not sure what could have caused this and how I go about correcting it.

I have been running my printer for quite a while without errors. I had a failed print the other night and since then my printer was unable to start a new one. It would fail during the home check. I tried to run the calibration but the X-Axis fails instantly when traversing to the left. (after hitting the far left stop it immediately indicates a failed test with an "X-Axis Length Error"). 

When I manually move the extruder left to right it feels like there might be a little "chop" when it gets close to the far left stop. 

Any advice? or would I be better off fully disassembling the whole thing and re-assembling?

I tried raising the temps from 250 to 255 on the hardend nozzle, but am not seeing much difference regarding the PETG grid problem. Does anyone know what causes this (see picture)? Isnt it weird some lines look perfect and others fail?

AI says my PLA clogging problem might be caused by too high chamber temps (around 40c when printing, the air filter that came with ultimate seems to cause higher chamber temps, vents are open!), what can I do to fix this?

By the way I am drying the filament in a dryer prior to printing.


https://freeimage.host/i/CHiqRnV

i am trying to print the original prusa glow in the dark petg filament. i use a 0,6mm hardend nozzle and the petg heatbed, but the print alway comes lose :/ i tried a gluestick and raised the heat of the heatbed, but still have issues.

does anyone has experience how to print the material?

thank you in advance

Marco