Solidoodle 2

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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 direct-drive mod (3D model on Thingiverse)
- Lawsy extended filament guide
- http://tomhorsley.com/hardware/solidoodle/solidoodle-ybearing.html – Y-axis bearing support with SFL686ZZ flanged bearing
  - Massively reduces Y-axis binding (especially after the bushings have started to wear)
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:

Axis	Motor
X	SM35HT36-1004A NEMA-14: Single shaft, 1.8°/step, 2.0V 1.0A, 19 Oz-in (1400 g-cm) holding torque, 4-lead
Y	SM42HT33-1334A NEMA-17: Single shaft, 1.8°/step, 2.8V 1.33A, 30 Oz-in (2200 g-cm) holding torque, 4-lead
Z
Extruder

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.

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: