Printer was working for 20 hours, suddenly this happened with x axis ... any ideas??  

RE: Printer was working for 20 hours, suddenly this happened with x axis ... any ideas??

Power your printer off and move the extruder left and right. Both directions should be perfectly smooth.

If you feel any binding, left or right, the printer will pick it up as a crash.

You did lubricate your bearings during construction? Some light oil on the rod is OK for a test.

Extruder bearing screws too tight can also cause binding.

RE: Printer was working for 20 hours, suddenly this happened with x axis ... any ideas??

I think I may have found the issue ... i took the back extruder panel off and cut the zip ties holding the upper bearing and tried to move the bearings by hand, they are really stiff on the upper rod ..... the extruder is still attached to the lower rod and that seems to be moving fine. Are these allowed to be oiled? or should I be contacting Prusa support about this?

RE: Printer was working for 20 hours, suddenly this happened with x axis ... any ideas??

Thanks Robert .... oiled the bearings and it's now perfect again 🙂

RE: Printer was working for 20 hours, suddenly this happened with x axis ... any ideas??

https://help.prusa3d.com/en/article/i3-printers-regular-maintenance_2072#rods-and-bearings

This is a mine field...  the assembly manual says not to lube the bearings,
as you found out, Lubing the bearings works wonders... 
Armchair warriors will say RTFM and build it as instructed. quite aggressively, 

when I spoke to Prusa Support, they said YES Lube the bearings... (Use the lube they include in the kits these days...) 

then perfectionists will start claiming that their prferred Lube is the best...     

My thoughts... almost any lube is better than no  lube...   
Treacle thick grease is probably not a good idea, 
WD40 Water displacement fluid, is nor a proper lubricant and should be avoided.
I would also stear clear of silicone based lubricants because they can be devils to remove from accidental spill sites (Like Heatbeds) and some folk believe silicone migrates onto surrounding areas... 

Good luck

Joan

I have
one printer lubed with yellow lithium general purpose grease
One Lubed with White Lithium Bicycle bearing grease, 
One Lubed with Slug Slime Oil (Light machine oil) and 
One lubed with Prusa White lithium Grease,

and they all run fine...
I can't remember what My Geetech is lubed with, probably yellow lithium grease.
and My SL1 printer Linear rail is lubed with Slug Slime oil

I also Wash my build plates on the four Prusa FDM printers.... 
Guess I am going to burn in hell... because the armchair warriors say that is forbidden in the manuals... 

PLA Sticks to my clean build plates without any glue or hairspray at 65 to 70C... 

RE: Printer was working for 20 hours, suddenly this happened with x axis ... any ideas??

I am safe with my opinions. I never frequent Facebook groups - or Reddit...

Around here, we tend to recommend things proven to work. Not always the Prusa line.

Actually - our users here are a pretty civil bunch.

RE: Printer was working for 20 hours, suddenly this happened with x axis ... any ideas??

Any lubricant is better than non at all and you will find loads of recommendations and contradictions on what is best, and best is not necessary if you are a hobbyist type of printer person, but if using your printer at extremes of speed or 24/7 for business, then you should look for the best solution for your needs.

Have a read through the link below and make up your own mind and if your not sure, then go with what PRUSA recommend, it's a good grease for this application if you can get it outside the Czech republic.

https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-hardware-firmware-and-software-help/can-i-use-these-lubricants-of-my-mk2-or-3/#post-170794