Troubleshooting on Ivo's CNC Corner

Pin Testing

Mon, 01 Jan 0001 00:00:00 +0000

Pin Testing#

The motion controller has multiple electrical inputs for receiving external signals. They are called “pins”.

The most common pins are used for limit switches and probing. Others can be hooked to physical buttons, like for initiating homing, or pausing a job.

It is important to ensure that they are working properly.

Testing limit switches#

First, you need to find the limit switches. There are usually two for each axis. They could be stationary on each side of the axis. Or they could be mounted on the carriage and move with it.

Electromagnetic Interference

Mon, 01 Jan 0001 00:00:00 +0000

Electromagnetic Interference (EMI)#

Disclaimer: I am not an electrical engineer. Everything you read on this page is bits and pieces I’ve collected over the years that seem sensible. They could be incomplete, totally wrong, or simply a case of cargo cult (magic ferrite beans, really?).

Consult with other more reputable sources before making drastic changes to your equipment.

Electromagnetic interference is the bane of all electronics.

CNC machines are especially susceptible to it for three reasons.