Head collision during pause

[JonRaymond]

You can add a X/Y homing call after the pause gcode so that the printer homes after you clean the nozzle.

M400 U1 ; Pause for user intervention
G28 X Y ; Home the X and Y axes in case they were upset

I did some test and found the repeatability to be well within reason.

XY homing when paused

Well… Interesting results. Printing a 25x25x50mm cube with Custom G-Code: “G28 X Y” inserted every 1cm yielded very promising results. The printer seems to home very consistently as there are no “steps” in the part. There is the slightest visual layer difference when looked at it in the right light but nothing you can feel with your fingernail. There is a little bit of stringing on the back side when the nozzle comes back from the wiper. [G28 Test] Inserting the "Pause: “M400 U1 G28 X Y” in …

Here is also another good thread with a very similar topic to yours.

Solved - Custom G-Code for " Pause - Wipe - Resume"

I like many others have a problem when printing PETG-CF. The nozzle seems to collect filament and then after enough accumulates it deposits it on the print. This can result in many different issues depending on where it drops it. I have my filament tuned very well and my prints look great, until the blob comes off. If the prints are small, less than an hour or two it does not accumulate enough to be a problem but long prints always suffer. If I do a manual pause and wipe the nozzle with a brass…