"DAB" is the new extruder carriage consisting strong roller guides to enable direct nozzle probing. When DAB is unlocked, the whole extruder & hotend can be slid up for a 2~3mm. A microswitch is used as the sensor.
"Wobble Wafer SFU12" (for 1204 ball screws) is the variation of Wobble Wafer (for T8 lead screws). It has 4 DoF that can cancel the possible wobbles in XY direction and tilt in Z from imperfect ball screws.
Tank v2 alpha features:
- Build volume: 350x350x400
- Gates LL-2GT-RF 9mm belt
- Stacked industrial F604zz bearings as long-life idlers
- Minimal gap between 2 XY belts to minimize the torque to XY linear blocks for high acc/speed movements
- Lightweight MGN9H linear guide and carbon fiber back tube as X gantry.
- MGN12C linear guides for longer life.
- Mounting holes in the frame for 4 CoreXY steppers
- 3 ball screws as Z drive, with 3 Wobble Wafer SFU12 installed
- CAN bus toolhead with NEMA14 round stepper
- BTT Octopus Pro + 5 TMC2209 for XYZZZ + EBB36 for E
- Red emergency stop button
- [optional] DAB extruder carriage for direct nozzle probing
- [optional] PTC chamber heater
- [optional] 5" HDMI Klipper screen
To be improved in the beta version:
- To gain more space, place 2 Z drives at the front and 1 Z drive at the rear side, as the locations in Tank v1.
- Use belts and pulleys to scale up the torque and stopping force of Z steppers, but not direct drives.
- Extend the legs of the bed toward the ball screws to lower the torque to the bed brackets.
- Mounting points for toolhead and bed drag chains.
P.S. this prototype is vinyl-wrapped for personal customization.
