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Thursday, March 23, 2023

on video How To Make Homework Writing Machine at Home


 Drawing Robot/Pen Plotter/Drawing Machine is an Open Hardware version of the famous machine AxiDraw which it is a pen plotter, capable of writing or drawing on almost any flat surface. It can write with pens, permanent markers, pencils, and other writing implements to handle an endless variety of applications.


Its unique design features a writing head that extends beyond the machine, making it possible to draw on objects bigger than the machine itself. The biggest advantage of the machine is that it can be placed on the book because of the core XY extending design of the machine.


This Drawing Robot/Pen Plotter/Drawing Machine is similar to the commercially available AxiDraw. It is powered by an Arduino Uno controller, uses a CNC Shield, and GRBL firmware


The cost to build the Drawing Robot is between $75 depending on where you buy your parts and whether you already own some of the parts such as the Arduino.

Download the files from Thingiverse


Open the 3D models in Cura or any other slicer.


Use 75% infill on all the parts (An infill of 70 – 100% will work as well)


Printed all the parts with 0.10 – 0.20 mm layer height


Printed with PLA


Use supports on the Penholder, Slider, X_Support_L and the X_Support_R


Note: The longest part took around 10hrs and the shortest took 30 minutes to print


PLA is fine for this design. I print at 200C on BuildTak. None of the parts require rafts or brims. I suggest supports only for the pen holder and the Z axis end plate which is standing up.

Remember that you need (2) 350mm and (2) 450mm long linear rods


Take the (2) 450mm linear rods and insert them into either x-support part


Use may need to use a round file to smooth out the holes that you insert them in

Also, you can use a rubber mallet to help insert the rods

Now take the threaded rod and insert it into the hole below. Feed a 5/16in washer and 5/16in nut on both sides of the x-support part

Now you want to push the LM8UU bearings into their place on the top and bottom clamshell (The top and bottom clamshell take (4) bearings each)


Take (4) 624zz bearings and push them through the 3D-printed idler pulleys. Leave the 5th bearing for later when you assemble the Y-axis


Assemble the X-Axis (Carriage)


Get (4) M3-0.5 x 20mm screws, (4) M3 nuts, (4) M3 washers and (4) 624zz bearings with the idler pulleys installed

Take one screw and feed a washer through it, the washer will rest on the bearing. The nut will be at the bottom of the carriage, which will secure the bearing in place

Assemble the X-Axis (X-Support)


Slide the clamshell through the 450mm (X-axis) linear rods

Use a rubber mallet again to attach the last X-support on the linear rods

Make sure that the rods stick out equally on both sides

Slide the other end of the threaded rod through the hole on the X-support

Put on the last set of nuts and washers to hold the X-support in place

Now that the X-axis is complete, you can use (2) Phillips M3-0.5 x 16mm screws per X-support to help keep the linear rods from sliding


 Drawing Robot/Pen Plotter/Drawing Machine is an Open Hardware version of the famous machine AxiDraw which it is a pen plotter, capable of writing or drawing on almost any flat surface. It can write with pens, permanent markers, pencils, and other writing implements to handle an endless variety of applications.


Its unique design features a writing head that extends beyond the machine, making it possible to draw on objects bigger than the machine itself. The biggest advantage of the machine is that it can be placed on the book because of the core XY extending design of the machine.


This Drawing Robot/Pen Plotter/Drawing Machine is similar to the commercially available AxiDraw. It is powered by an Arduino Uno controller, uses a CNC Shield, and GRBL firmware


The cost to build the Drawing Robot is between $75 depending on where you buy your parts and whether you already own some of the parts such as the Arduino.

Download the files from Thingiverse


Open the 3D models in Cura or any other slicer.


Use 75% infill on all the parts (An infill of 70 – 100% will work as well)


Printed all the parts with 0.10 – 0.20 mm layer height


Printed with PLA


Use supports on the Penholder, Slider, X_Support_L and the X_Support_R


Note: The longest part took around 10hrs and the shortest took 30 minutes to print


PLA is fine for this design. I print at 200C on BuildTak. None of the parts require rafts or brims. I suggest supports only for the pen holder and the Z axis end plate which is standing up.

Remember that you need (2) 350mm and (2) 450mm long linear rods


Take the (2) 450mm linear rods and insert them into either x-support part


Use may need to use a round file to smooth out the holes that you insert them in

Also, you can use a rubber mallet to help insert the rods

Now take the threaded rod and insert it into the hole below. Feed a 5/16in washer and 5/16in nut on both sides of the x-support part

Now you want to push the LM8UU bearings into their place on the top and bottom clamshell (The top and bottom clamshell take (4) bearings each)


Take (4) 624zz bearings and push them through the 3D-printed idler pulleys. Leave the 5th bearing for later when you assemble the Y-axis


Assemble the X-Axis (Carriage)


Get (4) M3-0.5 x 20mm screws, (4) M3 nuts, (4) M3 washers and (4) 624zz bearings with the idler pulleys installed

Take one screw and feed a washer through it, the washer will rest on the bearing. The nut will be at the bottom of the carriage, which will secure the bearing in place

Assemble the X-Axis (X-Support)


Slide the clamshell through the 450mm (X-axis) linear rods

Use a rubber mallet again to attach the last X-support on the linear rods

Make sure that the rods stick out equally on both sides

Slide the other end of the threaded rod through the hole on the X-support

Put on the last set of nuts and washers to hold the X-support in place

Now that the X-axis is complete, you can use (2) Phillips M3-0.5 x 16mm screws per X-support to help keep the linear rods from sliding

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