Solidoodle 2

• Solidoodle 2 Pro
  • MKS GEN V1.4 controller
    • Marlin firmware, custom configuration.
    • Pololu DRV8825 stepper motor drivers
    • MKS GEN 1.4 pinouts
    • MKS GEN datasheet
    • MKS GEN with TMC motor drivers and LCDs
    • Marlin Gcode reference
    • Marlin config guide
  • Removed the top cover – need to find a way to make this fit with the Y-axis direct-drive mod and cable chain in place.
  • Z-axis "Nut-hugger" Z-wobble prevention mod (soon to be replaced with a proper trapezoidal leadscrew)
  • Bed alignment thumbscrews with M4 nuts – massively simplifies bed levelling
  • Lawsy carriage kit with LM8UU linear bearings and extruder fan duct (with 12V 30x30x10mm fan)
  • Lawsy-Wardjr-Mdroman extruder mount – replaces the Solidoodle “jigsaw”. Variant of the Lawsy Mk5 mount.
    • E3D v6 all-metal hotend, 1.75mm direct-feed
    • E3D HobbGoblin, 5mm ID extruder drive gear
    • Lawsy lowered Z-screw to account for the height of the E3D extruder
      • Later replaced with a machined aluminium Z-screw
  • Keenovo 120W silicone bed heater element with internal thermistor
  • Cable chain and belt guard
  • Y-axis bearing support with SFL686ZZ flanged bearing and Y-axis direct-drive mod (3D model on Thingiverse)
    • Massively reduces Y-axis binding (especially after the bushings have started to wear)
  • Lawsy extended filament guide
  • Rear spool holder by Tarwin
• Next additions:
  • Belt clamps to reduce the risk of the Y-belt breaking at the screw-holes
  • http://www.soliforum.com/topic/2361/all-bearing-y-axis-conversion/ – All-bearing Y-axis
  • https://www.thingiverse.com/thing:2451368/comments – TUSH++ filament spool holder
  • LCD display, SD card and control panel for the MKS
    • http://osoyoo.com/2016/06/30/mks-1-4-3d-printer-board-marlin-firmware-installation-guide/

Per SoliWiki's list of compatible hardware:

I replaced the stock Y-axis motor with one from WeDo3DPrinting when I fitted the direct-drive mod. I did the same with the X-axis motor when I replaced the carriage. This means the current motor setup is:

Axis	Motor
X	35SHD0102-20B, NEMA-14: Single shaft, 1.8°/step, 4.35V 0.75A, 150mN.m, 4-lead
Y	42SHD0404-22, NEMA-17: Single shaft, 1.8°/step, 3V 1.5A, 480mN.m, 4-lead
Z	Original
Extruder	Original

Holding torque comparison:

• X: new motor 150mN.m vs. original 134mN.m
• Y: new motor 480mN.m vs. original 212mn.m

New motors awaiting installation:

• Z-axis: Precision Maker MTR-N17-48, NEMA-17. 1.8-degree (200 step). 3.4V 1.7A, 520 mN.m

The microstep jumpers are located under the driver boards. See this for a photo.

Installing a jumper sets the given mode line high. Removing it sets the mode line low.

Microstep settings with the DRV8825 drivers:

• Vapour smoothing – http://blog.reprap.org/2013/02/vapor-treating-abs-rp-parts.html
• Finding maximum print speed – http://www.soliforum.com/topic/15529/finding-maximum-print-speeds/
• Fixing Reprap clone LCDs with reversed connectors – https://www.youtube.com/watch?v=ZvRfaYAIc4g
• Calibration
  • Extruder calibration (extrude-and-measure method and extrusion multiplier) – https://mattshub.com/2017/04/19/extruder-calibration/
  • https://reprap.org/wiki/Calibration
  • Triffid Hunter's calibration guide
  • The Essential Calibration Set (STL files)
  • 20mm X/Y calibration box
  • Marlin3DPrinterTool – calibration aid for printers running Marlin
  • Printing multi-colour with a single extruder
• Prusa optimal layer height and steps-per-rev calculator – https://www.prusaprinters.org/calculator/#optimallayer
• Kapton tape -- wet mount method