Unresolved Sudden infill issues?

My guess would be slicer issue. What slicer?

 

Seems like an odd one like its confused. I honestly would at least re slice and try again. Other than that check the switches for auto level? We truly need more information as to your set up to offer anything other than wild guesses.

 

I do not know a slicer by that name, can you link to it?

If this was working initially it may not be a software issue, but it is not an obvious hardware problem either.
Try another slicer and see.

 

Im guessing matter control. Hey would you use this????

NO! LOL

 

No, it is not obviously a mechanical issue*. Is the ambient temperature / environment the same? (It matters.)
I agree that with the same STL and all you would expect the same results. If you are NOT getting the same results have you compared the GCode to be certain that something has not altered in the slicer? (it matters). Even small seemingly innocuous changes can alter how the slicer does the job. Some slicers are better than others and more reliably do the slicing (the free ones are all a crap shoot, but when they work they generally work OK). It could even be a failure/glitch reading the SD card.

I would suggest starting by not printing from the SD card and see if any warnings or errors are raised during the print. These are not visible when you print from the SD card. Also, try another slicer.

*obvious mechanical issues are really obvious. You would get nothing or mostly nothing -- really obvious failures. It is possible that a stepper driver is detuned or going weak, but you will not be able to tell without further testing.

 

One last thing is to try another model... one of the calibration models. If it is mechanical then the model will not affect it to any great extent.

If we can identify this as a stepper driver issue (model will not affect that) then you can look at tuning or replacing that -- easy enough. If the steps are always short on the same axis (X or Y) then that will be something to look at. Those going bad will cause the stepper to drop/skip/miss steps.

 

One other easy test is to cut the print speed in half. If that affects this then it may very well be a mechanical (rather than electrical or software) issue. Belt tension or lose set screws would be the next check in that case.

 

Because that style of failure is usually laid at the door of the slicer. You made no comments about which one so we have to assume a worst case (MatterJunk).

You might also look over here:

https://www.simplify3d.com/support/print-quality-troubleshooting/

There are some things you can try as well. (this one looks close: https://www.simplify3d.com/support/print-quality-troubleshooting/#gaps-between-infill-and-outline)

Given that the same GCode is changing behavior over time it is more likely something non-slicer (but you had far too little detail in the OP to make that call).


If a calibration cube is showing this and speed does not affect it, then we can look at digging into the stepper drivers. That is a more complex thing to need to do if you can solve it from the software. If the stepper driver is really failing then adjustments will not 'stick', but if it just shifted calibration a bit then you might be fine.

P.S. Since you didn't specify the printer version we don't know exactly what electronics you have, but we can nail that down if you determine it is something that could be affected by the electrical side.