Pict. 37 - Fan error
You can turn off the monitoring in
LCD menu - Settings - Check fans
for example if you
replaced one of the fans with a replacement not supporting RPM sensing.
13.1.3 Extruder drive gear
The Bondtech Extruder gears on the extruder motor shaft can have build-up of filament
shavings in the grooves and cause under-extrusion. A small brass brush is an ideal tool to
clean the grooves, but a regular toothpick will do the job as well. Check and clean from the
access window on right side of the extruder assembly. Clean what you can, then rotate the
gear and repeat. Nothing needs to be disassembled. Clean when you see signs of missing
plastic in the objects, e.g. missing lines of extrusion.
The Bondtech Extruder gears are made from hardened carbon steel. As the gear meshing
section is constantly turning during operation it needs lubrication to reduce wear, lower the
friction and to reduce noise.
A lithium based grease
is recommended to be used.
Oil is not
recommended
since it might spread to the section where the filament is fed to the hotend.
After extensive use it is recommended to remove, clean and inspect the gears. This is also a
good time to also put some grease on the needle bearings in the secondary gear to keep the
friction low.
13.1.4 Electronics
It is a good practice to check and eventually reconnect the electrical connectors on the
EINSY RAMBo board. Do so every 600-800 hours of printing.
13.1.5 Smooth PEI sheet rejuvenation
The smooth PEI sheet can lose its adhesive powers after a couple hundred hours. Wipe it
thoroughly with acetone when you see models getting loose to restore the adhesion. Note
that this procedure is forbidden for the textured sheet, where it leads to permanent damage
to the surface.
13.2 Print surface preparation
Print surface preparation is described in
6.3.2 Preparation of spring steel sheet
chapter.
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