I am curious how often do you service the linear rails on the 3D-printer:
- How often do you lubricate them (MGN9 or MGN12)?
- How do you lubricate them?
- What volume of lube do you use?
Explanation of how often you should do it (HIWIN Lubricating instructions for linear guideways and ballscrews)
Most 3D-printer use MGN12. Reading the HIWIN documentation they shall be lubricated every 20-50km (depends on a lot of factors).
How much is 50km in print time? Assuming an average speed of 300mm/s that would be approx. 46 hours!
In other words, the generic MGN12H carriage needs 1-2 times per week maintenance.
How much lube is suggested (horizontal mounting)? 70µL for MGN12H. For MGN9H it is 30µL!
Printers are pushing significantly faster acceleration these days with upto 50k mm^2/s and 1m/s is already real.
Which hotend do you use to push >100 mm^3/s?
Lets be real here, a bambulab x1c which is currently considered high speed for >95% of users (which you are asking for here), has a maximum flow rate of 22 mm^3/s which limits it to about 250mm/s for 0.2mm layer height.
Divide the number by 5 which would be roughly every 100 print hour or two weeks of printing.