RP9 Assembly Instructions
2
Specifications ...................................................................................................................... 3
Getting Started .................................................................................................................... 3
Safety first ....................................................................................................................... 3
Required tools ..................................................................................................................... 3
Building the Printer ............................................................................................................. 4
Extruder Assembly.......................................................................................................... 4
Y Sub-assembly .............................................................................................................. 7
X-Subassembly ............................................................................................................. 13
Frame assembly ............................................................................................................ 14
Z Assembly ................................................................................................................... 15
Z - Rod Assembly ........................................................................................................ 16
X Assembly ................................................................................................................... 18
Extruder (cold end) Assembly ...................................................................................... 20
Adding the Electronics ...................................................................................................... 22
Controller Assembly ..................................................................................................... 22
Motion Stepper motors ................................................................................................. 23
Limit Switches .............................................................................................................. 25
Adding The String Drive .................................................................................................. 26
Tying the knots (Uni-knot) ........................................................................................... 27
X string Drive ............................................................................................................... 27
Y String Drive ............................................................................................................... 29
Adding the Extruder Driver .......................................................................................... 31
Build Platform Assembly .................................................................................................. 33
Connecting the Controller ................................................................................................. 34
Ramps1.4 Connections ................................................................................................. 34
Wire Routing With Nylon Ties ..................................................................................... 35
Filament Spool Holder ...................................................................................................... 36
Initial Controller Setup ..................................................................................................... 37
Arduino 2560 Firmware settings .................................................................................. 37
Power supply ................................................................................................................. 38
First print (quick guide) ................................................................................................ 39
Appendix ........................................................................................................................... 42
Warranty and Return Policy.......................................................................................... 42
Parts included in the basic kit ....................................................................................... 43
Added parts included in the deluxe kit ......................................................................... 44
3
Specifications
5 ply Baltic birch frame
Oil hardened drill rod linear rails
Filament drive with high grip v-groove threaded coupler drives
Remote extruder with 1.75 mm drive
Foot print
Width 520 mm (20.5") - including spool holder
Depth 550 mm (21.7" - with max travel
Height 660 mm (26") - room for filament guide tube
Print Area
X 200 mm (7.9")
Y 200 mm (7.9")
Z 200 mm (7.9")
The complete printer part list can be found in the appendix.
Getting Started
Safety first
Safety is your responsibility. Always use the
proper protective equipment and "safety
sense" when building or operating a 3D
printer.
Printers have high voltage power supply, and extruder operating temperatures can be over
250 degrees Celsius (482 F). The operator should understand the hazards before
operating a printer.
Required tools
Please browse through the instructions and get familiar with the steps before you
begin.
To put the kit together you will need:
a Phillips screwdriver for the screws
a pair of pliers to hold the nuts
a sharp knife or a pair of side cutters to trim the zip ties and string
sand paper to clean up the plywood parts and remove sharp edges.
4
B
C
A
Tools you may need for the electronic setup include:
25 to 40 watt soldering iron/solder
Diagonal Cutters (dikes)
multimeter to correctly set up the power supply and stepper motors and general
trouble shooting.
For the printing you will want to have:
computer with a USB to program and run the printer
calipers to measure motion distance and extrusion width
calibration block STP file that can be modeled or downloaded at BobsCNC.com
Building the Printer
We recommend a large working surface for assembling the printer. The plywood
may require some minor sanding and can be painted, stained or finished for a different
look. A coat of sealer or lacquer on all surfaces of the plywood will add stability.
Extruder Assembly
Parts for the extruder mount
assembly include:
A. 1 Extruder mount
B. 1 Extruder top mount
C. 1 Extruder lock
D. 3 M3 x 20 machine screws
E. 3 M3 nuts
F. 2 LM8UU bearings
G. 4 Large nylon ties
H. 1 Extruder
5
1. Place the bearings into the rectangular slots of the extruder mount.
2. Wrap the 2 bearings by inserting large nylon ties through the side opposite of the
bearing into the slotted holes of the extruder mount. The slots on one side are larger to
make room for nylon ties during a later step.
3 Pull the bearing snug against the extruder mount (use pliers if needed).
4. Cut off the excess of the nylon tie.
For a clean look and string clearance, insert the nylon straps first in the inboard
holes.
6
5. Insert the 4 extruder wires through the extruder mount from the same side as the
bearings through the wire slot.
6. Place the extruder through the extruder plywood mount.
7. Pull the wires through and re-coil them to keep them out of the way and undamaged.
8. Install the extruder lock.
9. Install the extruder top mount.
7
A B B
E
H
11. Insert the 3 M3 x 20 screws into the holes.
12. Install the 3 nuts and tighten.
Check to ensure that the thermistor is inserted into the small hole in the
aluminum block.
Y Sub-assembly
Parts for the Y sub-assembly include:
A. 1 Left mount
B. 2 Bearing holders
C. 1 Extruder assembly
D. 1 M3 x 16 machine screw
E. 1 Right mount
F. 4 M3 x 20 machine screws
G. 6 M3 nuts
H. V groove bearing 623VV
I. 2 LM8UU bearings
J. 12 Large nylon ties
K. 2 8mm rods
8
1. Place the bearings in the rectangular slots of the 2 plywood bearing holders.
2. Wrap the bearings by inserting large nylon ties through the side opposite of the bearing
into the slotted holes of the bearing holders.
3 Pull the bearing snug against the 2 bearing holders (use pliers if needed).
4.Cut off the excess of the nylon tie.
9
Bearing mounting hole
TOP
5. Insert the bearing and then the nut on the M3 x 16 machine screw.
6. Tighten the nut
7. Install the screw and bearing through the top of the right mount through the bearing
mounting hole.
8. Install and tighten the nut.
The bearing should rotate freely once installed.
10
Bearing centers
9. Press in the 2 M3 nuts into the slots on both of the 2 bearing holders.
10. Assemble the left and right mounts to the bearing holders with 2 M3 x20 machine
screw.
11. tighten the screws.
Note orientation is important. The bearing center should line up with the hole on
the left and right mounts.
11
Note orientation
Note orientation
12. Slide both 8mm rods through the bearings on the extruder assembly.
13. Slide both rods into the left and right assemblies with the extruder nozzle facing
down. The large slots in the extruder, bearing and large stepper motor hole are on the
same side as shown.
Note that the nylon tie under the Y limit (see page 25) switch slots will be
installed differently.
14. For 7 of the nylon ties, wrap the rods by inserting large nylon ties through the side
opposite of the rods into the slotted holes of the left and right mounts.
12
15. Pull the rods snug against the left and right mounts (use pliers if needed).
16.Cut off the excess of the nylon tie.
17. Wrap the rod by inserting the last large nylon tie through the same side as the rod into
the remaining slotted holes of the left mount.
18. Pull the rod snug against the left mount (use pliers if needed).
19. Cut off the excess of the nylon tie.
The extruder assembly should slide on the 8mm rods freely.
13
X-Subassembly
Parts for the x-subassembly
include:
1 Plywood cross member
4 LM8UU bearings
8 Large nylon ties
1. Place the bearings in the u-shaped slots of the cross member.
2. Wrap the bearings by inserting large nylon ties through the side opposite of the bearing
into the slotted holes of the bearing holders.
3 Pull the bearing snug against the extruder mount (use pliers if needed).
4. Cut off the excess of the nylon tie.
14
Indicator drill
B
C
E
D
E
Frame assembly
Parts for the frame assembly include:
A. 2 Top braces
B. 1 Left frame
C. 1 Right frame
D. 1 X sub-assembly
E. 2 Bottom braces
F. 8 M3 x 20 machine screws
G. 8 M3 x 20 nuts
The orientation of B, C, and D
is important.
Indicator marks on the frame
should be at the back facing inward.
The middle stepper mount
(key hole shaped hole) should be
closer to the left frame
1. Properly orient and insert x sub-assembly into the left and right frame.
2 Press with pliers or tap the 8 M3 nuts into the 8 slots of the 4 braces. ( the handle of the
screw drive works well)
3. Insert the top and bottom plywood braces into the slots.
4. Install and tighten the 8 M3 x20 machine screws.
15
Z Assembly
Parts for the z assembly include:
1 Frame assembly
1 Y assembly
2 8mm rods
4 Large nylon ties
The orientation of top nylon ties is
important. The nylon locking block needs to be on
the outside to give maximum Y axis travel.
1. Place the Y assembly into the frame.
2. Insert the rods through the Y assembly and position them into the holes of the cross
member at the bottom and u-shaped slots at the top of the frame
2. Wrap the top of the rods by inserting large nylon ties through same side as the rod into
the slotted holes of the extruder mount.
3. Pull the rods snug against the frame (use pliers if needed).
4. Cut off the excess of the nylon ties.
16
5. Wrap the bottom of the rods by inserting large nylon ties through the side opposite as
the rod into the slotted holes of the extruder mount.
6. Pull the rods snug against the frame (use pliers if needed).
7. Cut off the excess of the nylon ties.
The Y assembly should slide on the 8mm rods freely.
Z - Rod Assembly
Parts for the Z rod assembly include:
1 Frame assembly
2 1/4-20 threaded rods
4 Coupler halves
8 M3 x 20 machine screws
8 M3 nuts
The orientation of the coupler is
important. The larger slots are paired and
connected to the threaded rod.
17
1. Assemble each of the threaded rods into the larger coupler slots.
2. Connect the coupler halves with 4 M3 x20 screws and nuts.
3. Only snug up the screws, they will be tightened in a later step.
6. Thread both of the coupler assemblies into the threaded inserts on the Y assembly. The
coupler halves may need to be removed to get the threads started through the inserts on
the Y assembly.
18
X Assembly
Parts for the x assembly include:
A. 2 X string holders
B. 1 X bed mount
C. 1 Frame assembly
D. 2 8mm rods
E. 4 Large nylon ties
F. 4 M3 x16 machine screws
G. 4 M3 nuts
Note orientation. The string holder
is mounted on bottom on the front and it
is mounted on top in the rear. The cut
groove in the string holder mates with
the bed mount.
1. Install the string holders into the bed mount using 2 M3 x 16 machine screws.
2. Install the M3 nuts and tighten
2. Insert the rods into the bearings on the cross member and install the bed.
19
5. Wrap the bottom of the rods by inserting large nylon ties through the side opposite of
the rod into the slotted holes of the extruder mount.
6. Pull the rods snug against the frame (use pliers if needed).
7. Cut off the excess of the nylon ties.
20
Extruder (cold end) Assembly
B
D
A
E
F
H
Parts for the cold end include:
A. 1 Backing plate
B. 1 Bearing arm
C. 1 Mid plate
D. 1 Front plate
E. 1 Drive bearing
F. 1 Nylon bushing
G. 1 Stepper motor
H. 1 Extruder drive gear
I. 1 Filament guide tube
J. 1 Filament guide tube nut
K. 1 Large washer
L. 2 M3 x16 machine screws
M. 1 Small washer
N. 1 M3 nut`
O. 2 M3 x 20 machine screws
P. 2 O-rings
1. Insert the M3 x 16 through the extruder arm.
2. Install the small washer on the screw.
3. Install the bearing on the screw.
4. Install the nut on the screw and tighten
5. Press the nylon bushing into the extruder arm.
6. Insert the big washer onto the M3 x 16 machine screw.
21
7. Insert the screw and washer thru the nylon bushing on the extruder arm.
8. Insert the screw through the backing plate and screw into the stepper mounting hole.
9. Insert the extruder drive gear and adjust the height so that the bearing is centered on
the knurled part of the wheel. Tighten the extruder drive wheel with the Allen wrench.
10. Thread the filament guide nut onto the filament guide tube so that 10 to 12 mm (0.4 -
0.5") is through
11. Insert the tube and nut into the front plate groove.
12. Stack the mid plate on the backing plate and insert the M3 x16 into the lower right
mounting hole.
22
13. Stack the top plate onto the mid plate and insert 2 M3 x 20 machine screws.
14. Tighten all 4 of the screws.
15. Add 2 o-rings
16. Adjust the guide tube so that it is close to the drive wheel without touching it.
Adding the Electronics
Controller Assembly
Parts for the Ramps:
A. 1 Frame assembly
B. 1 Controller assembly
1 Arduino
1 Ramps1.4
4 Stepper drivers
C. 4 Small nylon ties
Snug up board against the frame
until if is firm. Do not over tighten the ties
as this will damage the control board
23
D
1 Install the controller board underneath the bed on the right hand frame.
2. Insert and loosely tie the top two small nylon ties through the frame and Arduino
mounting holes.
3. Insert the 2 bottom small nylon ties.
4. Gently snug the control board up against the frame.
5. Cut off the excess of the nylon tie.
Motion Stepper motors
The minimum lengths of wire for the stepper
motors are:
X Stepper 125 mm
Y Stepper 584 mm
Z
Stepper 305 mm
Right
Z
Stepper 330 mm
Left
E Stepper 520 mm
Parts for the motion stepper motors:
A. 1 Frame assembly
B. 4 Stepper motors
C. 2 threaded couplers (x & y stepper motors)
D. 1 X stepper spacer
E. 4 M3 x 16 (x-stepper motor)
F. 12 M3 x 10 machine screws
24
1. Place the spacer on the X stepper motor and install the assembly onto the middle
mount of the cross member.
2. Install and tighten the 4 M3 x16 machine screws.
3. Install the Y stepper motor to the Y assembly with 4 M3 x 10 machine screws.
4 Tighten the machine screws.
5. Set the height on the Y threaded coupler so that the Allen key is flat against the top of
the Y assembly.
6. Set the height of the X threaded coupler so that it is approximately 1 mm less than the
round spacer thickness. (This will give the build platform clearance)
4. Install and tighten both of the Z stepper motors 4 M3 x10 mm machine screws.
5. Tighten the 8 coupler machine screws so that the gap is even and parallel on both
sides.
If the Z stepper motors have flats, then align the flats on the motor shafts as seen
in the diagram.
25
Limit Switches
Parts for the motion stepper motors:
A. 1 Frame assembly
B. 2 Limit switches (long wires)
C. 1 Limit switch (short wire)
D. 4 M2.5 x16 machine screws
E. 4 M2.5 nuts
F. 1 small nylon tie
1. Insert the small nylon tie through the Y limit switch ( long wires) hole, loop around
the rod and back up through the second limit switch hole. (Left side)
2. Tighten the nylon tie and cut off the excess.
3. Place the Z Limit switch (long wires) on the left frame near the top with 2 M2.5 x16
screws and nuts.
5. Tighten the nuts.
26
4. Install the X limit switch (short wires) on the inside of the lower left frame. 2 M2.5 x
16 screws and nuts.
5. Tighten the nuts
Adding The String Drive
Parts for the string drive assembly include:
A. 1 X drive string assembly (shorter)
B. 1 Y drive string assembly (longer)
C. 4 large nylon ties
The kit includes 2 sets of tied string. The
instruction for tying the knot has been added for
reference.
27
Tying the knots (Uni-knot)
This knot is called the Uni-knot and has "how to" videos on
You-Tube.
1. Loop the string through the locking block of the nylon tie.
2. Loop the same string behind the horizontal stationary string,
bring it up over both horizontal strings
3. Repeat step 2 for a total of 5 loops.
4. pull the knot tag end and tighten the knot.
The tied length of the string from one nylon tie to the other is:
X-string L = 330 - 350 mm
Y-string L = 690 - 710 mm
X string Drive
1. Place a large nylon tie into behind the string holder, then thread the large tie connected
to the string through the string holder into the loose nylon tie
2. Push the bed to the rear stop making the coupler closer to the nylon tie.
3. Push the nylon tie connected to the sting into the string holder until the nylon tie is
close but is no longer touching the X threaded coupler.
28
4. Wrap the string around the threaded coupler 3 to 4 times close to the bottom of the
threaded coupler.
5. Insert the large nylon tie with the string attached through the rear string holder and the
loose nylon tie.
6. Snug up the string and slide the bed back and forth to ensure that the sting rides in the
threads of the coupler with full travel ( threads will move up as the bed moves rearward)
7. If needed, adjust the string moving it up or down the threaded coupler.
8. Tighten the sting by pushing the nylon tie into the string holder.
9. Cut off the excess of the nylon ties.
The string should be on the right side of the threaded coupler and form a straight
line as shown in the picture above.
29
Y String Drive
1. Insert the large loose nylon tie into the top of the left hole and align the box end to the
bottom hole of the extruder mount.
2. Insert the large nylon tie with the string attached into the bottom slot on the left side of
the extruder.
3. Move the extruder to the left stop and push the nylon tie connected to the string into
the string holder until the nylon tie is no longer touching the threaded coupler.
4. Wrap the string around the threaded coupler 3 to 4 times close to the bottom of the
threaded coupler.
The string should higher on the front side of the threaded coupler as shown in the
picture above.
.
30
5. Route the string across the printer to the right hand mount around the pulley then back
to the extruder.
6. Insert the large loose nylon tie into the right hole and align it with the top slot on the
right side of the extruder.
7. Snug up the string and slide the extruder back and forth to ensure that the sting rides in
the threads of the coupler with full travel with nylon tie clearance.
8. If needed, adjust the string moving it up or down the threaded coupler.
9. Tighten the string by pushing the nylon tie into the extruder slots.
10. Cut off the excess of the nylon ties.
31
The extruder should move from left to right without contacting any parts of the
frame or Y assembly parts. The string on the nylon ties may need to be adjusted if there
nylon tie hits the frame. Please note that the string orientation.
Adding the Extruder Driver
Parts for adding the extruder driver include:
D. 1 Frame assembly
E. 1 Extruder assembly
F. 1 SMC connector
G. 2 M3 X 20 machine screws
H. 2 M3 Nuts
The SMC fitting will release the tube if the
blue ring is push into the fitting as the tube is
gently pulled. This allows for quick
filament changes.
32
1. Press the 2 M3 nuts into the right mounts.
2. Insert and tighten 2 M3 X20 machine screws.
3. Insert the SMC into the top of the extruder.
4. Insert the tube into the SMC
33
Build Platform Assembly
Parts for adding the build platform include:
A. 1 Build Platform
B. 4 Round Spacers
C. 4 M3 X 20 machine screws
D. 4 M3 Nuts
The Build platform has counter bored
holes. These holes should be facing up.
1. Place the 4 spacers over the holes in the bed mount.
2. Insert 4 M3 X 20 machine screws through the build platform, spacers, then bed mount.
3. Install and tighten the 4 M3 Nuts
34
Connecting the Controller
Ramps1.4 Connections
The main power (A) and the stepper motors (C,H,I,
and J) have to be connected correctly. Improper
connection can permanently damage the board. If you are
unsure about the connection, the internet is a good resource
and has a great deal of information on the Ramps1.4.
The connections are:
A. Main Power supply F. Z-max limit switch
B. Extruder power G. Extruder sensor
C. Extruder stepper motor H. X stepper motor
D. X-min limit switch I. Y stepper motor
E. Y-min limit switch J. Z stepper motors
35
Wire Routing With Nylon Ties
There are drilled holes in the frame and small extra small nylon ties included in
the kit to secure the wires. Several sets of wires will need clearance to move with the Yassembly. They included the:
Extruder and Y stepper motor wires.
Y and Z limit switch wires.
The Extruder heater and sensor wires.
The 2 extruder sensor wire routes to the front. Below are pictures of typical wire routing.
36
Filament Spool Holder
Parts for adding the filament spool holder include:
A. 1 Printer
B. 1 Spool leg
C. 1 Spool support
The reel holder is designed to quickly change
spools of filament. The groove in the top of the
spool support should be oriented to the outside for to
ensure spool clearance with the frame.
1.Insert the spool support into the right frame and spool leg rectangular slots.
37
Congratulations your Printer is assembled!
If you are new to 3D printers, there is a lot of learning ahead. The good news is that there
are many resources online to help you with questions. You will need to choose software
and firmware that suits your needs.
Initial Controller Setup
If you purchased the deluxe kit, the board has been tested and the firmware
has been downloaded to the controller and configured for the RP9. You can skip to
the power supply section.
1. Download Arduino Software
2. Use the Arduino software to configure the firmware
2. Connect the controller to the computer via the USB and download the firmware to the
computer
Arduino 2560 Firmware settings
The firmware will need to be up loaded to the Arduino board using the Arduino software
that can be downloaded at: http://arduino.cc/en/main/software
There are several good choices in firmware. Repetier is a good choice and can be located
at: http://www.repetier.com/ It includes the software and firmware for a complete
package.
The firmware will need to be configured. Good starting values are:
X Velocity 100 mm/s
Y Velocity 100 mm/s
Z Velocity 4.5 mm/s
E Velocity 100 mm/s
X Homing Velocity 100 mm/s
Y Homing Velocity 100 mm/s
Z Homing Velocity 4.5 mm/5
X Acceleration 2000 mm/s
Y Acceleration 2000 mm/s
Z Acceleration 100 mm/s2
E Acceleration 100 mm/s2
With micro stepping set to 16
X stepper motor 98.5 steps/mm
2
2
38
Y stepper motor 98.5 steps/mm
Z stepper motors 2519.685 steps/mm
E stepper motor 164.7 steps/mm
Starting PID control settings for the extruder are:
Integral drive max 255
Integral drive max 40
PID P gain 8.5
PID I gain 0.35
PID D gain 51.5
Temperature sensor type 9
The firmware offers an auto tune (command M303) to set the PID values.
Power supply
The Power supply will need to be connected correctly to avoid possible damage
to the controller board. Check polarity with a multimeter and follow the controllers
recommendations. The power supply should be rated at 6 to 8 Amps at 12VDC.
1. Correctly connect the 4 terminals to the Ramps 1.4 Connector terminal.
39
First print (quick guide)
Initial setup and calibration of the printer will takes some time but once you
understand the parameters you will be able to diagnose printing issues quickly. We have
included some basic steps to get you started.
Connecting the printer
1. Connect the power supply
2. Connect the controller to the computer via USB
3. Open the controller software and connect the printer (250,000 baud rate)
Moving the X, Y, and Z axis
1. Use the software controls to move the X,Y and Z
steppers. make sure the move in the correct
direction. The diagram has arrows showing the
positive axis directions.
If the motors move in the incorrect
direction, it can be changed with a firmware setting
or turning the stepper motor connectors 180
degrees. The power must be removed before stepper
motor connectors can be removed to avoid damage
to the controller board.
Loading the 1.75 mm filament
40
1. Insert the wedge tool (included in the kit) into the extruder driver releasing the force of
the drive bearing onto the extruder drive as shown.
2. Insert the 1.75 mm filament into the bottom hole of the top mount through the filament
extruder drive tube until it reaches the extruder.
3. Use the software controls to turn on the extruder to the correct working temperature of
the filament. Once the extruder reaches the set temperature, use the software control to
feed the filament into the nozzle. Check to make sure the extruder stepper motor rotates
in the correct direction.
Homing and Z Height Adjustment
1. Home the axles to ensure that the limit switches are connected correctly
Note that the switches are wired normally closed. If the limit switches do not
function troubleshoot the switches using the M119 code.
2. Set the firmware for Z max length to 210 mm.
3. Use the G0 Z20 command to move the printer close to the bed.
4. Slowly move the Z axis close to the bed. Use a gage or business card to get the right
side of the bed the set distance to the nozzle. (business card is around 0.35 mm thick)
41
5. Once you get the set height for the left side, move the Y axis to the right a little at a
time while adjusting the height of the nozzle from the bed to the set height my manually
adjusting the right Z stepper motor.
6. Repeat steps 4 and 5 until the nozzle is the same distance from the bed for Y travel.
7. Note the Z position displayed in the software. If the number is positive, then subtract
this number and add the gauge thickness from the Z max length. For example. If the Z
max length was set to 210 and once moved to the set position the software position reads
7.1 mm. then the Z max length would need to be set to 210 - 7.1 + 0.35 = 203.25
8. Set this value in the firmware for the Z max length.
9. Home the Z axis and use the G0 Z0.35 command to verify.
10. Download a file and print a part.
Tips and tricks
Isopropyl alcohol to clean blue painters tape to ensure first layer sticking
First layer is key. Experiment to learn what is the best layer height.
Different colors will have different printing characteristics
The string drive may loosen as the knots pull tight. Simply tighten them by
pushing the nylon ties to the next click.
42
Push to connect (SMC) will quickly release the filament guide tube and allows for
quick filament changes.
The firmware offers an auto tune (command M303) to set the PID values.
Appendix
Warranty and Return Policy
30 Day Warranty
BobsCNC will guarantee all supplied parts for 30 days after the delivery date. If there
are missing or defective parts, the buyer must contact Bobs CNC during this 30 day time
frame using the "Contact Us" form located at BobsCNC.com. After 30 days, no warranty
is given nor will any refund be given. In order to receive a refund, the kit must not have
been assembled or attempted to have been assembled. Bobs CNC will have the sole
discretion to determine if a kit or any part of the kit is eligible for a refund.
Technical Assembly
BobsCNC cannot guarantee the buyer's ability to assemble the kit or calibrate the printer.
The quality of the prints are dependent on proper set up and understanding of the printing
parameters, and therefore results may vary. The assembly, calibration, and understanding
of these parameters requires technical and mechanical proficiency. Please review the
instruction manual and this return policy prior to purchase as there can be no refund for a
kit that has been attempted to be assembled or assembled fully.
Return Shipping Damage
Bobs CNC will not be liable for any damage incurred during shipping for a return. It is
suggested that in case of a return that the buyer purchase shipping insurance.
43
Quantity
Extruder assembly
Y - Sub Assembly
X - Sub Assembly
Frame Assembly
Z - Assembly
Z - Rod Assembly
X - Assembly
Extruder Assembly
Controller Assembly
Motion Stepper Motors
Limit Switches
Braided String Drive
Extruder Driver Mount
Build Plate
Extra Stuff
Extruder Mount
1 1
Extruder Lock
1 1
Extruder Spacer
1 1
Left Mount
1 1
Right Mount
1 1
Bearing Holders
2 2
Crossmember
1 1
Top Braces
2 2
Bottom Braces
2 2
Left Frame
1 1
Right Frame
1 1
Coupler Halves
4 4
Bed Mount
1 1
String Holders
2 2
Backing plate
1 1
Bearing Arm
1 1
Mid Plate
1 1
Front Plate
1 1
X Stepper Motor Spacer
1 1
Build Plate
1 1
Round Spacers
4 4
Spool support
1 1
Spool leg
1 1
Wedge tool
1
M2.5 X 16 Machine Screws
4 4
M2.5 Nuts
4 4
M3 X10 Machine Screws
12
12
M3 X16 Machine Screws
11 1 4 2 4
M3 X20 Machine Screws
31 3 4 8 8 2 2 4
M3 Nuts
36 3 6 8 8 4 1 2 4
1/4-20 Inserts
2 2
1/4-20 Threaded Rods
2 2
LM8UU Bearings
8 2 2 4
V groove Bearing
1 1
Parts included in the basic kit
44
Drive Bearing
1 1
Large Nylon Ties
55
4 12 8 4 4 8
15
Small Nylon Ties
25 4 1
20
8 mm Drill Rod
6 2 2 2
Bowden Tube
1 1
Nylon Bushing
1 1
O-rings
4 2 2
Large Washer
1 1
Small Washer
1 1
Bowden Nut (10-24)
1 1
Threaded Couplers (7/16-20)
2 2
1.5 mm Allen Wrench
1 1
Limit switches (long wires)
2 2
Limit switch (short wire)
1 1
Braided String
4 2 2
SMC 1 1 Extruder
1 1
Extruder Drive Gear
1 1
Quantity
Extruder assembly
Y - Sub Assembly
X - Sub Assembly
Frame Assembly
Z - Assembly
Z - Rod Assembly
X - Assembly
Extruder Assembly
Controller Assembly
Motion Stepper Motors
Limit Switches
Braided String Drive
Extruder Mount
Build Plate
Extra Stuff
Stepper Motor
5 1 4
Ramps 1.4
1 1
Arduino 2560 (with
firmware)
1 1
Stepper Drivers
4 4
Power Supply
1 1
Added parts included in the deluxe kit
The parts in the deluxe kit can be purchased separately.
The extruder for the RP9 printer can be found at: BobsCNC.com
The NEMA17 stepper motors can be found in many online stores. The
extruder stepper should rated holding torque of 5.5Kg.cm (76 oz-in). Other
stepper motors can be less but could reduce performance. Search for
"printer stepper motors"
45
The feedstock drive wheel needs to fit a 5 mm shaft and
knurling bottom diameter of 6 mm. Search online for
"feedstock drive wheel" .
The Arduino, Ramps1.4, and A4988 stepper drives (with heat sinks)
are common in online stores.
The power supply should be 12 VDC an rated at 6 to 8 amps. Search
online for "12 VDC 8 amp power supply".
Other supplies that you will need are:
Build plate can be hardboard, glass, aluminum, etc.
o Size is 200 to 215 mm square
Blue painters tape ( or a glue stick) and build plate clips
1.75 mm PLA with 0.05 mm tolerance
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