boop

Description: Its a polar, 4axis, cantivileerian 3d printer! It uses a unorthodox aproach to rotate the hotend in b axis, and y axis, using only 2 motors and being pretty cool! The printbed is also backlit!! :3 WHy? idk, felt like it tbh. Saw a cool video on yt, thought: i wanna do that. And then highway happened. And then this happened.

Cad

PCB

Diagram

Power Supply (LRS-350-24) Connections

LRS-350-24:

AC Input L (Live): → Mains AC Hot
AC Input N (Neutral): → Mains AC Neutral
AC Input Ground: → Mains AC Ground
+V (24V): → SKR3 VIN terminal
-V (Ground): → SKR3 GND terminal
+V (24V): → LED Strip positive terminal
-V (Ground): → LED Strip negative terminal

SKR3 Main Board Connections Stepper Motor Drivers

SKR3:

Driver Socket X: → X-axis stepper driver (TMC2209/TMC2226)
Driver Socket Y: → Y-axis stepper driver (TMC2209/TMC2226)
Driver Socket Z: → Z-axis stepper driver (TMC2209/TMC2226)
Driver Socket E0: → Extruder stepper driver (TMC2209/TMC2226)

Endstop Switches

SKR3:

X-STOP pin 1 (Signal): → X endstop switch NO (Normally Open)
X-STOP pin 2 (GND): → X endstop switch COM (Common)
Y-STOP pin 1 (Signal): → Y endstop switch NO (Normally Open)
Y-STOP pin 2 (GND): → Y endstop switch COM (Common)
Z-STOP pin 1 (Signal): → Z endstop switch NO (Normally Open)
Z-STOP pin 2 (GND): → Z endstop switch COM (Common)

Hotend (XC1) Connections

SKR3:

HE0 pin 1 (+): → XC1 hotend heater cartridge positive
HE0 pin 2 (-): → XC1 hotend heater cartridge negative
TH0 pin 1 (Signal): → B57560G1104F000 thermistor pin 1
TH0 pin 2 (GND): → B57560G1104F000 thermistor pin 2
FAN0 pin 1 (+): → XC1 cooling fan positive (24V)
FAN0 pin 2 (-): → XC1 cooling fan negative

Print Bed Connections

SKR3:

HE1/BED pin 1 (+): → Print bed heater positive
HE1/BED pin 2 (-): → Print bed heater negative
THB pin 1 (Signal): → Bed thermistor positive (if separate)
THB pin 2 (GND): → Bed thermistor negative (if separate)

LED Strip Connections

SKR3:

FAN1 pin 1 (+): → LED strip positive (via MOSFET if needed)
FAN1 pin 2 (-): → LED strip negative

Parts

Part	Qty	total$	link
sherpa mini	1	24	Ali
vslot rail	2	16	Ali
nema17+screw	2	20	Ali
nema17	3	15	Ali
skr3+drivers	1	77	Ali
lrs-350-24	1	35	Ali
pillow-bearing	2	12	Ali
pulley	2	3	Ali
pulley no-teeth	4	12	Ali
back-pulley-xaxis	1	2	Ali
big-xaxis-pulley	1	5	Ali
bearing-uni	4	5	Ali
gantry_vslot	2	18	Ali
4010 fan	1	4	Ali
sliding rod	1	3.2	ali
lm8uu bearing	2	3	ali
m4 screws+nuts	36	8	local_shop
m3 screws+nuts	25	8	local_shop
m2 wcrews+nutss	4	1	local_shop
m2.5 screw	2	1	local_shop
m5 screws+nuts	35	4	local_shop
m8 screws+nuts	5	4	local_shop
B57560G1104F000 thermistor	2	8	mouser
leds4printbed	75	15	piekarz🔥
gt2 belt	1	8	Ali
nutblock	2	6	Ali
xc1 hotend	1	2	Ali
jumper cables (m2m & f2f & m2f)	40 each	8	Botland note: after customs aliexpress is actually more expensive + m2m and f2f connectors cost the same - ~2.5$)
endstop switches	3	4	ali
pcb	1	20	jlcpcb

holy fuck its actually exactly 350$ wtf nicee i though i was gonna pay from pocket