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Articulated Seahorse

  (work in progress blog) I want to tell my experience and story about the creation of MELS 3D LABS Articulated Seahorse. Of all the Articulated designs, this has a unique story and place among them all. Early 2024, i was researching for an articulation no other designer has ever made. It should be an interesting creature as well, my research led me to seahorse, a beautiful creation of nature.  THE SCULPTING My sculpting workflow evolved over the years,  a systematic, hence its time consuming but foolproof approach to perfection. Typically i sculpt 2-3 days straight, mostly skipping  breakfast as i get hyper obsessive. The sculpting path : Typically i could create a link and the body section, where then i can duplicate it, then scale it down and keep duplicating it up to the tail. That would save a lot of time and effort. But for the seahorse, This wasn’t the case. The body is curved, hence even after duplicating, each link has to be precisely sculpted to preserve th...
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R1 Classic by Mels 3D



The project began with the development of a 1-meter Cartesian Cube prototype machine. However, to facilitate easier transportation around the house, the printer's width was reduced from 1 meter to 83 cm. Making it a rectangular frame and cubical print bed. This naming it as R1. This modification retains the essential functionality of the original design while making it more convenient for home use.
Build Specs

Max tested printing speed : 150mm/s
Best results as of now : 75mm/s with 550 acceleration & 0.04 junction Deviation
Printer dimensions :
Length : 120 cm 
Width : 83 cm
Height : 83 cm 

Current Print Dimension :
60 × 60 × 50 cm
Print Dimension upgradable :
120*83*83 cm
Endstops set to : 48x * 38y * 28z cm

Firmware :
Marlin 2.0.6.1 upgraded to 2.0.8.2 with SKR2

Steps per unit 
A4988 (100, 100, 2600, 95) 
DRV8825 (200, 200, 5200, 190)

Iinear Advancement K = 0.22
Baud 250000

# printing Material (All metal)
[PLA, ABS, Nylon, ASA, TPU etc]
# 1.75mm filament
# 100k ntc b 3950 Thermistor
# 12v 40w heating cartridge
# E3D V6 All Metal J-Head Hotend Extruder

PID Tuning

195°c
Kp : 41.88 
Ki : 7.41
Kd : 59.18

185°c
Kp : 42.65
Ki : 7.23
Kd : 62.90

# Fat Nema extreme Extrusion stepper
# 5mm glass Bed
# Heavy wooden framework for vibration absorption.
# 0.4mm nozzle (0.2-2mm range)
# print cooling fan + Motherboard cooling
# RGB Printing Lights
# Arduino Mega R3 2560 upgraded to SKR2
# A4988 Driver upgradable to TMC
# 12v 20A power supply
# Isolated power supply for LED and Ramps Cooling
# Full Graphic Display
# 8mm SS rod with steel LM8UU
# PTFE tube with Bowden Extrusion
# Smooth wheels for printer transportation
# LED spot light for print Highlights
# 1 meter PTFE tubing (upgradable to y filament splitter)


START GCODE
G21 ; Millimeter units
G90 ; Absolute XYZ
G28 ; Home all axes
G1 Z5 F100 ; Z raise
M109 S240 ; Wait for nozzle temp
G92 E0 ; Reset extruder distance
G1 F2000 E10
M106 P0 S20
M117 Melxlxtreme Active
G1 X140 Y170 E5 F1550 ; move to start
G1 Z-0.19 F1200 ; Move to layer height

END GCODE
G91 ; Relative position
G1 E-12 F1300 ; Retract 12mm at 1300mm speed
G0 Z4 F2000 ; fast move z +4
M104 S0 ; Turn off nozzle heater
G90 ; Absolute Position
G28Y ; Home Y
M84 ; Disable steppers
M300 P250 S262
M300 P25 S0
M300 P250 S330
M300 P172 S0
M300 P184 S311
M300 P250 S415
M300 P180 S0
M300 P256 S233
M300 P250 S349
M300 P184 S0
M300 P250 S262

Test Prints 
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