Trouble with my BLTouch

[Daftlander]

So I bought an Ender-3 and a BLTouch. After upgrading the firmware to Marlin, and attaching the sensor, the machine wont home. X and Y are fine but when it tries to home Z the sensor just deploys once, immediately retracts and the Z axis never moves.

 

What do I do? 

[Guest]

1 minute ago, Daftlander said:

So I bought an Ender-3 and a BLTouch. After upgrading the firmware to Marlin, and attaching the sensor, the machine wont home. X and Y are fine but when it tries to home Z the sensor just deploys once, immediately retracts and the Z axis never moves.

 

What do I do? 

How did you update the firmware? Supplied firmware or just downloaded from the marlin GitHub page?

Also, make sure the sensor is connected properly.

[Daftlander]

Downloaded from Github, then uploaded through an Arduino as ISP. (The USB cable is coming on Monday). Both red and blue LED's are shining solidly, which I think means the connection is fine. 

 

Followed this tutorial

 

 

[Daftlander]

I've found the problem. Z endstop wiring was loose. Thanks for your help.