Han-Bot DRT User manual

Maintenance for 3D printer
3D printer is high-precision equipment,
the precision will be influenced if you
disassemble the nozzle, so you need
adjust and position of the Z end-stop
and the spring of the hotbed again.
Calibration
Items to be adjusted
1. whether the hot bed is flat
2. height between the nozzle and
hotbed
Details：
1. Whether the hot bed is flat
There are 4 screws, see the picture

The formation of the screw
First, click in the host
Screw 3
Screw 4
Screw 1
Screw 2

software to zero the nozzle position,
Put a name card on one corner of hot
bed, Click ,1mm every click,
when the nozzle fall to the position,
where the name card can be moved,
but you can feel the resistance, then the
height of this corner is OK, click
X ans Y and move
thenozzletoother3corners,movein
small distance, about 1mm every click,

do just above mentioned to adjust the
height. If the heigh is too large, loosen
the nut, if too small, tighten the nut.
After that your hot bed is flat now.
Step 2 now:
Height between hotbed and nozzle。
Firstly, adjust the Z end-stop upwards
Zend‐stop

Click ， nozzle would fall until
the end-stop close, now there might
be certain distance between the
nozzle and the hotbed , then we
adjust the end-stop down in small
distance every time, after every
adjustment, press , until the
name card can move but you can feel
the resistance, then the calibration is
OK, tighten the screw of Z end-stop
PS: the criteria of the height between
nozzle and hot bed is that the first
layer just be flattened.

Regular Maintenance
1. After print many times, there might
be some filament adhere to the nozzle.
The filament will be carbonized, if the
carbonized filament fall to the printed
parts, maybe your printed show would
be ugly, what ’ s more, the filament
extruded will also adhere to the
carbonized, bad for your printing.
After print one or two times, you can
use knife or graver to scrape the
carbonized filament, or clear the nozzle
with acetone.

2. When printing, the machine will
vibrate, so the screw will loosen, which
will influence the printing. Regularly,
check the screws and nuts, including
the M8 nuts, hollow-lock socket set
screw in the pulley, extruder driving
gear, and the Z axis coupling
Need clear
OK

3. The high-temperature adhesive tape
couldmaketheprintedpartsadhereto
the hotbed easily. If the you use it for a
very long time. The tape might be

damaged if the nozzle is too near to the
tape, then printed parts won’t adhere
to the bed or the first layer is not flat.
So you should often change the tape.
4. The driving gear is a very important
set for extruder the filament. During
extruding, some very little filament will
adhere to the gear and fill the groove,
then the gear cannot extrude the
filament fluently because the friction
To be cha ng ed OK

force is not enough. So you should
clear the groove with little graver, awl,
needle or any pointed objects.
5. After some time, the linear bearing’s
oil would dry and it won’t move well
and rust easily. So you should often
drop the engine oil
To be clea red
OK

6. You should also drop the engine oil
to the Z axis M8 nut of both side.

7. The belt will loosen after some time,
if it is too loose, you should tighten
them.