Rostock Mini Pro V0.9

October 15, 2017 | Author: Roko | Category: Belt (Mechanical), Screw, Nut (Hardware), Technology, 3 D Printing
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Rostock Mini Pro Mechanical Build Document V1.0

Table of Content

About the Rosotck Mini Pro --------------------------------------------------------------------------------- 3 Tools Needed --------------------------------------------------------------------------------------------------- 4 Identifying the Printed Parts --------------------------------------------------------------------------------- 5 Installing the Base --------------------------------------------------------------------------------------------- 6 Installing the Arms and the Platform ---------------------------------------------------------------------- 8 Installing the Carriages --------------------------------------------------------------------------------------10 Installing the Top ---------------------------------------------------------------------------------------------12 Installing the GT2 Belt ----------------------------------------------- ¡Error! Marcador no definido. Installing the Extruder ------------------------------------------------ ¡Error! Marcador no definido. Installing the Power Supply ----------------------------------------- ¡Error! Marcador no definido.

About the Rostock Mini Pro Rostock Mini Pro belongs to the 3D printer family called Delta printer. Unlike traditional Cartesian-coordinated 3D printers, Delta 3D printers use three vertical motions to control the head movement. This design reduces printer’s complexity and allows very fast printing. Other 3D printers in this family include Rostock, Kossel, and the experimental Simpson. The Rostock Mini Pro was based on the Rostock Mini, which was designed by Brian Evans. 3D Printer equipped the Rostock Mini Pro with 12 Traxxas 5347 u-joints, carbon fiber arms and a 5.2:1 planetary geared Nema 17 motor. The Rostock Mini Pro has an effective printing of 18cm x 18cm x 18cm.

Tools Needed Due to its cylindrically symmetric design, the Rostock Mini Pro is relatively simple to assemble. All the tools are provided except for a soldering iron (two points need to be soldered in order to use the 12V laptop charger).

Included: 1x Pliers 1 x Allen wrench set (M3, M4, M5, and M8 screws) 1x Tape measure 1x Circular file (for cleaning the printed parts)

Not included: 1x Soldering iron (for joining the power leads of RAMPS 1.4 and Mega 2560) 1x Blue painter’s tape (literally eliminates the problem of print not sticking to bed)

Estimated Assembling Time: 3 hours

Identifying the Printed Parts There are in total 17 printed parts. Get a clear understanding of what they are and what they do can save you a lot of time when assembling the Rostock Mini Pro. Frame (16 pieces in total)


Motor End


Central Platform




Hotend Groove Mount


Motor Idler


Hotend Top Mount


Belt Clip


Fan Mount


Installing the Base Required Part


Printed Motor Mount


Nema 17 Motor


GT2 36-teeth Pulley


M3-10 screw


M3 washer


M4-16 screw


M4 washer


Acrylic Bottom Piece


1. Attach a Nema 17 motor to the printed motor mount using four M3-10 screws and four M3 washers. Orient the Nema 17 motor so that the wires are on the side or top. Repeat this step for the other two corners.

2. Attach the GT2 36-teeth pulley to the Nema 17 motor’s shaft. Orient the pulley so that one set screw is on top of the shaft’s flat side. You will have to adjust the position of the pulley for alignment at a later time.

3. Attach the three finished corner pieces in the above step to the acrylic bottom piece with twelve M4-16 screws and twelve M4 washers (screw the M4 bolts directly into the printed motor mount will require some force). The slit and laser engraved marks on the bottom acrylic piece provide reference for software calibration later.

Installing the Arms and the Central Platform Required Part


Traxxas 5347 u-joint


3K Carbon Fiber Tube


M4-20 Set Screw


M3-25 Screw


Printed Central Platform


Plastic Film

12 small pieces

1. Assemble the Traxxas 5347 u-joints by inserting the ball bearings into the plastic frame. The easiest way to do this is use a pair of pliers. Have one side of the plier on the bearing and the other side on the plastic frame. Apply a bit of pressure and the bearing should pop right into the opening. Insert M4-20 lead screws into the finished u-joint. Repeat for the other eleven u-joints.

2. Insert the finished u-joints into the carbon fiber tubes. You will need to wrap the M4 lead screws with a layer of plastic film (cut open one of the screw bags) to have the head properly secured to the carbon fiber arm. Make sure the u-joints on both sides are aligned.

Need more pictures 3. Attach the six carbon fiber arms to the central platform with six M3-25 screws and six M3 nuts.

Installing the Carriages 1. Insert two 8mm precision rods into the a printed motor mount. Make sure the precision rods are inserted all the way to the bottom. Tighten the motor mounts’ clamps using six M3-16 screws and six M3 nuts. Repeat this step for the other two corners. Please ignore the belt in the left picture below as we will install it in a later step.

*Please ignore the belt shown in the left picture as we will install it in a later step

2. Screw a M3-30 bolt into the printed carriage. You will have put in some pressure as the printed hole is without threads. Make sure the bolt is installed on the top side. This bolt is used to trigger the end-stoppers on the printed idler. Repeat this step for the other two printed carriages.

3. Insert LM8UU bearings onto the precision rods. Zip-tie the printed carriage to the LM8UU bearings through the mounting holes on the printed carriages.

Need a Picture 4. Attach the carbon fiber arms to the printed carriages using two M3-16 screws and two M3 nuts. Repeat this step for the other two sides. Ignore the belt shown in the picture below.

*Ignore the belt shown in the picture above. It will be installed in a later step.

Installing the Top 1. Solder two thin wires to the COM and NC leads on the end-stopper. Remove the lever with a pair of pliers to expose the red button underneath. The lever will produce unnecessary error. Make sure each wire is at least 60cm long. Repeat this step for the other two end-stoppers.

2. Attach the end-stopper to the printed motor idler using two M2.5-12 screws. Make sure the orientation is correct as shown below. The COM lead on the endstopper is closer to the center. This is very important otherwise the carriage will miss triggering the end-stopper. Repeat this step for the other two sides.

Make sure the COM lead is closer to the center than the NC lead

3. Insert the printed motor idlers to the precision rods. Attach the top acrylic piece to the printed motor idlers using six M4-16 screws and six M4 washers. You will have to apply some pressure as the holes on the motor idlers are threadless.

Need a picture 4. Attach two 608zz bearings to the motor idler using a M8-30 screw and a M8 nut. Repeat this step for the other two sides.

5. Make sure the top acrylic piece is level and tighten the motor idlers’ clamps with M3-16 screws and M3 nuts. Repeat this step with the other two sides.

Need a picture

Installing the GT2 timing belt 1. Move the carriages all the way to the lowest point they can go. 2. Wrap the pre-cut GT2 timing belt around the 36-teeth pulley, the 607zz bearing, and the opening on the carriage. Close the belt with the printed belt clip at the highest point you can reach so it does not hit the bottom when your carriage move up. Cut the belt to get a good tension and then close the belt with the printed belt clip. 3. Attach the tensioning spring to the belt. 4. Repeat the above steps for the other two belts.

Need More Pictures

Installing the Extruder 1. Insert the steel gear to the Nema 17 motor. 2. Attach a 605 bearing to the printed extruderr piece’s opening with a M5-20 bolt and a M5 nut. 3. Attach the extruder printed piece to the motor with two M3-16 screws 4. Attach a M3-16 screw and a M3 nut to the extruder piece’s clamp.

Need more pictures

Installing the Power Supply To use the laptop charger, you will have to connect the power lead on the RAMPS 1.4 to the Power leads on the Mega 2560 board as shown below

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