Dual Z axis with independent motors at CNC

Controllers Smoothie
1

Hi folks! I‘m making something like storage robot/vending machine from a rare vehicle aerographic machine ARTROBO NNV2.5.
The machine has 2 Z axis with independent motors, gearboxes, drivers, endstops and electromagnetic brakes.
Brakes needed because gearboxes are not self-locking.
I’d like to do next things:

  1. Portal autoleveling when G28 Z with simple algorithm:
  • start homing both Z axes
  • when left or right Z endstop pressed - stop appropriate motor, but keep moving another one
  • when pressed the second endstop - stop homing.
  1. Automatic release brakes when Z axis at “ENABLE_MOTORS” state and activate brakes when Z axis at “DISABLE_MOTORS” state + manually activate/release left/right/both brakes by M-code and buttons on GPIO pins.
    Generally, I can do this features with custom PCB between smoothieboard and motor drivers, but I would like to do this with config file or firmware.
    Anybody have some ideas how to do this?

Imported from wikidot

2

There’s really no code in Smoothie right now that will let you do this, at the moment an external board is the way to do it.

3

Hello!
I’ve just made a Pull request regarding this feature as i needed it also.
(pull request 1210, sorry i’m not allowed to publish links)
I’ve tested it and so far so good on my side.
I hope this can help you, Please tell me if you have any feedbacks on this.