RoBo3D Autolevel via Mike Kelly

Just want to begin by saying this mod is credit by team RoBo. I decided to make my own version based on their design

Auto Bed Levelness Compensation (ABLC)

Questions and Answers:

What is Auto Bed Leveling?

Auto Bed Leveling is when the bed levelness is adjusted through mechanical action to achieve a bed that is leveled against the nozzles movement. This is not the same as ABLC

What is Auto Bed Levelness Compensation?

ABLC is the process of probing the bed with a measurement device to determine the level error of the bed and compensate for this by moving the Z axis up and down. There is no mechanical variation but rather software compensation.

Why is it referred to as Auto Bed Leveling?

Probably for simplicity sake. Hence why I titled this Autolevel. It's generally acceptable to trim words if your point is still made.

How it works:

The Robo3d has a safety measure put in where when the nozzle touches the bed, the nuts will unseat from their housing so as to not put force on the bed and get "thrown" out. This is what people refer to when they " throw their nuts".

Using this principle of the nut unseating, they used a coupling nut in it's place and attached a switch to it. The switch connects to the coupling with a plastic mount. The switches then activates against the x motor carriage and the x idler respectively.

With this switch in place, as soon as the nozzle touches the bed and the couplings begin to unseat the switch will deactivate sending a signal to the ramps board that an endstop has been hit. It's used for both the Z0 sensor and the probe sensor.

How mine differs:

With my design the switches are run in series to avoid a failure situation. Were the switches to be improperly seated or a failure in the wire the RoBo3d would just raise up during it's normal z operation and not throw the nuts. Click Here to see why I ran my switches in series.

Note: If you have auto bed leveling from RoBo3D do not use my firmware without modifying your wiring