Centroid Community CNC Support Forum

Anyone know how to control two (2) spindles with cnc11?

Are the spindles independently controlled? If not, you can just use the same signals going to both spindles. CNC11 systems do have the capability of controlling two spindles independently. The PLC program will need to be modified and you will also need to purchase the ADD4AD4DA board. We have not written a custom PLC program for that application and I can't say that I have ever heard of anyone else attempting this.

The second spindle is a servo motor with drive. I wanted to just use an axis output from the gpio4d. Basicly using the encoder for an axis as an rpm monitor and the -10v to +10v to control the direction and rpm. The external servo drive can be configured for RPM. Basicly +5volt would be 1000 rpm clock wise & -5volt would be 1000rpm counter clock wise. Ultimately I would like to match the spindle encoder with this drive. In other words reading this drives encoder and varing the -10v/+10v signal to match the spindle encoder.

bakeng,

You program an axis to move to a specific position, you cannot program it to a specified RPM. The only option to use a servo for a spindle is a C-axis on a lathe control. This option requires an unlock to function in the Centroid software.