Micro Core (Core XY) 3D Printer

Last crawled date: 5 years, 2 months ago

This is quite unique design of Core XY 3D printer.
The concept of this printer is Minimum price, Minimum weight, Maximum size, Maximum speed.
I have made this design to reduce the size as much as possible where as the printing area maximized.
Printable area is 105x105x110 (xyz).
And Frame size is 185x190x255.
Also I have used 3 Nema 17 motors (X,Y, Extruder), and 28BYJ stepper motor to reduce the total pricing. But still the printing speed is very fast using Nema 17 motors.
Update on Oct 16, 2019
Frame size:
X - 150
Y - 154
Z - 192 (left front - 200, the other 3 are 192)
Bed Frame size:
X - 126
Y - 120
Below are full list of purchase:
Ramps 1.4 , Mega 2560 R3, 5pcs A4988 Stepper Driver - $16.38https://www.aliexpress.com/item/32814623554.html?spm=a2g0s.9042311.0.0.27424c4dqq1mtP
GT2 Timing Pulley 16 Tooth 2GT - 2EA, (16T W10 B5 ) - 1.06https://www.aliexpress.com/item/32950478691.html?spm=a2g0s.9042311.0.0.27424c4d78XKrS
T8 Lead Screw, 150mm With Nut- 2E - $3.82https://www.aliexpress.com/item/32952885370.html?spm=a2g0s.9042311.0.0.27424c4dxMpgss
6mm linear shaft Rail - 4 EA - (6mm, 20cm) $9.81https://www.aliexpress.com/item/32903029399.html?spm=a2g0s.9042311.0.0.27424c4dI8BLpf
Rods Axles Bars 3mm x 150mm - 4Ea, $4https://www.aliexpress.com/item/32962104075.html?spm=a2g0s.9042311.0.0.27424c4dz3IUWm
Shaft Coupler 5mm - 2EA (5x8) $1.4https://www.aliexpress.com/item/32964188804.html?spm=a2g0s.9042311.0.0.27424c4dORNMjf
GT2 timing belt 1m - $1 (split in half, Type C, treated of teeth cloth)https://www.aliexpress.com/item/32822761985.html?spm=a2g0s.9042311.0.0.27424c4dLp3xHK
1Set E3D V6 3D Print J-head hotend - $3.17 (I choosen 0.2mm nozzle, 0.4mm is standard.)https://www.aliexpress.com/item/32911028903.html?spm=a2g0s.9042311.0.0.27424c4dORNMjf
Stepper Motor Gear Motor 28BYJ-48-5V - 2EA $3.5https://www.aliexpress.com/item/33013995007.html?spm=a2g0s.9042311.0.0.27424c4dvq3sfP
Mk8 Full Metal Extruder - $3.48https://www.aliexpress.com/item/32917502423.html?spm=a2g0s.9042311.0.0.27424c4dvq3sfP
PTFE Tube - (2x4)$0.72https://www.aliexpress.com/item/32814232529.html?spm=a2g0s.9042311.0.0.27424c4dWSJudp
nema 17 Stepper Motor - 3EA $21https://www.aliexpress.com/item/32728425552.html?spm=a2g0s.9042311.0.0.27424c4dlBlOw6
Blower Fan - 1 EA $1.59https://www.aliexpress.com/item/32820105987.html?spm=a2g0s.9042311.0.0.27424c4dlBlOw6
OLED screen $1.8https://www.aliexpress.com/item/32896971385.html?spm=a2g0o.productlist.0.0.17f11f54pp53K1&algo_pvid=36008fb0-dd87-4ae1-83de-8cd4fcafbd5e&algo_expid=36008fb0-dd87-4ae1-83de-8cd4fcafbd5e-0&btsid=719478f7-7d44-4c28-8b69-8b3b05ceb262&ws_ab_test=searchweb0_0,searchweb201602_8,searchweb201603_55
Frame : 13mm Pi metal pipe (recycled)
Power: Recycled (Sony, 12V, 4.2A), you can use any type of DC power, just make sure 12V and above 4A.
Bed: I cut glass and put bed sticker. No heating bed but works great with bed sticker.
Stop limit switch - 3EA, recycled.
Marlin Configuration (for version 1.1.9):
Can be download full version from below URL:http://marlinfw.org/meta/download/
I have uploaded Configuration.h file.
First enable CoreXY#define COREXY
Below are the most important part of configuration.
Z motor stepper speed and max feeder rate was quite complicate but using below it worked for me.#define DEFAULT_AXIS_STEPS_PER_UNIT { 100, 100, 4000, 105.64 }#define DEFAULT_MAX_FEEDRATE { 400, 400, 0.75, 45 }#define DEFAULT_MAX_ACCELERATION { 3000, 3000, 5, 300 }
Also for using OLED display:#define U8GLIB_SSD1306