Answered R1 - Z Axis sensor always triggered

Which one? There are two (left and right) on the R1.
The original Beta had a single switch, but if you have a beta that is NOT the correct firmware.

The Beta was the original printer, then the R1, then the R1+

All have slightly different firmware.

 

http://download.robo3d.com/firmware/R1/ROBO3D_BETA_6_10.zip

Assuming no upgrades (like leadscrews),

 

You can add the second switch and autoleveling to the beta for a very few dollars and a bit of time
Then just use the latest R1 firmware (but not the R1+)

 

Since that printer doesn't have autoleveling I see why that would be an issue

There is no guide that I am aware of.

Assuming a stock Beta you need two of these:

http://www.mcmaster.com/#90264a445/=115yd9y

Then print two of these:

http://www.thingiverse.com/thing:349935

Then you mount the switches like his picture shows and wire them in parallel and replace the NUTS on the threaded rods with the new (longer) ones. The mounting bracket for the switches clamps around this new nut (the bottom of it, the top slides into the carriage).

The Switches are wired to the NC pin creating a normally open circuit as the switches are always engaged when the carriage is working (nozzle not touching the bed). The home looks for a closed circuit (when not 'on the bed the switches are OPEN, when touching the bed one or both will be CLOSED). When the carriage is off the bed then it is pressing down on the switches keeping them OPEN and when the nozzle touches the bed one or more will lift up as it drives down.

Then land the sensor wires on exactly the same pin on the RAMPS as before.

 

I have converted 3 beta units (so far) to use autoleveling. It is not a huge mod and takes a hour or so.

 

Take your time, ask anything you have questions about. It sounds way more difficult than it is. You are relocating one switch and adding a second switch in parallel and replacing two nuts