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BobsCNC RP9 Assembly Instructions Manual

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RP9 Assembly Instructions

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Summary of Contents for BobsCNC RP9

  • Page 1 RP9 Assembly Instructions...

  • Page 2: Table Of Contents

    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 ........................

  • Page 3: Specifications

    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")

  • Page 4: Building The Printer

     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.
  • Page 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.
  • Page 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.

  • Page 7: Y Sub-Assembly

    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.
  • Page 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.
  • Page 9 Bearing mounting hole 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.
  • Page 10 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.
  • Page 11 12. Slide both 8mm rods through the bearings on the extruder assembly. Note orientation Note orientation 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.
  • Page 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.

  • Page 13: X-Subassembly

    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.

  • Page 14: Frame Assembly

    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 Indicator drill F. 8 M3 x 20 machine screws marks G. 8 M3 x 20 nuts The orientation of B, C, and D is important.

  • Page 15: Z Assembly

    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.

  • Page 16: Z - Rod Assembly

    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.
  • Page 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.

  • Page 18: Assembly

    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.
  • Page 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.

  • Page 20: Extruder (Cold End) Assembly

    Extruder (cold end) Assembly 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.
  • Page 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.

  • Page 22: Adding The Electronics

    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:...

  • Page 23: Motion Stepper Motors

    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.
  • Page 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.

  • Page 25: Limit Switches

    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.

  • Page 26: Adding The String Drive

    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.

  • Page 27: Tying The Knots (Uni-Knot)

    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.
  • Page 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.

  • Page 29: Y String Drive

    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.
  • Page 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.

  • Page 31: Adding The Extruder Driver

    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.
  • Page 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...

  • Page 33: Build Platform Assembly

    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.

  • Page 34: Connecting The Controller

    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.

  • Page 35: Wire Routing With Nylon Ties

    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 Y- assembly. They included the: ...

  • Page 36: Filament Spool Holder

    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.

  • Page 37: Initial Controller Setup

    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.

  • Page 38: Power Supply

    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 Integral drive max PID P gain PID I gain 0.35 PID D gain 51.5 Temperature sensor type The firmware offers an auto tune (command M303) to set the PID values.

  • Page 39: First Print (Quick Guide)

    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.
  • Page 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.
  • Page 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.

  • Page 42: 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.

  • Page 43: Parts Included In The Basic Kit

    Parts included in the basic kit Extruder Mount Extruder Lock Extruder Spacer Left Mount Right Mount Bearing Holders Crossmember Top Braces Bottom Braces Left Frame Right Frame Coupler Halves Bed Mount String Holders Backing plate Bearing Arm Mid Plate Front Plate X Stepper Motor Spacer Build Plate Round Spacers...

  • Page 44: Added Parts Included In The Deluxe Kit

    Arduino 2560 (with firmware) Stepper Drivers Power Supply The parts in the deluxe kit can be purchased separately.  The extruder for the RP9 printer can be found at: BobsCNC.com  NEMA17 stepper motors can be found in many online stores. The 5.5Kg.cm (76 oz-in).
  • Page 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. ...

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