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 printers 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 painters 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)

1 Motor End 5 Central Platform

2 Carriage 6 Hotend Groove Mount

3 Motor Idler 7 Hotend Top Mount

4 Belt Clip 8 Fan Mount

Extruder

Installing the Base

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.

Required Part Quantity

Printed Motor Mount 3

Nema 17 Motor 3

GT2 36-teeth Pulley 3

M3-10 screw 12

M3 washer 12

M4-16 screw 12

M4 washer 12

Acrylic Bottom Piece 1

2. Attach the GT2 36-teeth pulley to the Nema 17 motors shaft. Orient the pulley so

that one set screw is on top of the shafts 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

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.

Required Part Quantity

Traxxas 5347 u-joint 12

3K Carbon Fiber Tube 6

M4-20 Set Screw 12

M3-25 Screw 6

Printed Central Platform 1

Plastic Film 12 small pieces

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 pieces 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 pieces 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