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16 FAQ
Q: Sometimes the extruded filament looks ugly or has a varying diameter:
A: Not homogenous extruded filament can be caused by the following:
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Check the filament quality. Bad quality filament can have a varying diameter from 1.95 to 1.4mm instead of a continuous 1.75mm.
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There is not enough tension on the extruder arm. Increase the tension on the extruder arm a little. Be careful by not to put too much
tension, because the extruder motor can have a hard time turning
-
Filament gets stuck somewhere. Check if the feed of filament to the extruder is going without any obstructions.
Q: There is vibration during movement in the y-axis table
A:
For the Y-axis (moving table) this can be prevented by doing one of the following
-
Screw the bolts which hold the slider into the printed part less tight. When the screws are mounted too tight, the slider deforms a little,
this could give stick slip behavior.
-
Make sure the belt of the y-axis is tensioned properly. It could happen that when tensioning the belt the clamp slips. When this happens,
tighten the clamp more.
-
The jerking of the axis could also be because the y-axis stepper drivers should send more power to the y-axis. Try to rotate
the trimpot of the y-axis clockwise a little and see what happens. Too much will give some twitching of the motor, when
that happens turn the screw back a little.
For the X-axis
-
Tension the belt properly. Too much tension will give high frequency vibration during a movement.
-
Make sure the motors get enough power, try to turn the trimpot clockwise a little.
Q: There is a lot of backlash in the axis-movement:
A: Check the following:
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The belt is tensioned properly
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The set-screw on the motor-pulley is tightened enough
Q: When looking at walls of the printed parts, there are waves noticeable.
A: The reason for this is that the shaft of the motor, z-axis coupling and z-axis rod are not aligned properly. When the z-axis is rotating
there should be a wobble noticeable. Try to do the following:
-
Remount the z-axis coupling in the following way.
o Try to turn the screws at the motor side of the coupling one by one and bit by bit. Each turn should by ¼ turn. Try
to fix it loosely and try to keep the bottom of the coupling parallel to the motor face as good as possible
o Do the same for the top 2 screws of the coupling.
o Turn the coupling by hand and see what side the wobble goes when turning. Then try to turn the screws in such a
way that the spindle is moved in the opposite direction of the wobble.
When this seems ok, try to move the axis 10 mm up with pronterface. And see if there is still a noticeable wobble.
o
-
The large M8 nut situated in the z-axis carrier part could be too tight in the slot. Try to file the hole out some more so it can
move more freely.
info@felixprinters.com
www.felixprinters.com
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