Centroid Community CNC Support Forum

Hi, new problem. This is what I did.
Jogged both axis to their home positions, pressed the green button to set home. Checked the DRO, both axis set to zero.
Jogged the cutter to the leading edge of the material for the job. The material is 10mm diameter so input 10mm in the x axis, and zero for the z . Checked that the tool wear was set to zero on both axis. Set and saved all.
Loaded the g-code which was produced by fusion 360. I was using tool one which I had set up in the tool library. The WCS was set to yes.
Pressed the green button to start the program, but got the error that the encoder could be found.
I am totally unsure what to do. Is this a wrong setting within c12 set up. Or is it a g-code setting error.
Thanks.

I suppose it ia a lathe?

If so you will need a encoder for per revolution feed G99 or use G98 and per minute feed

Uwe

Thanks.

It means you have Constant Surface Speed enabled in your output / post processing. Disable that, rerun the code and it will work without an encoder.

Thanks Chaz, I was going to contact you about this. At the moment I am trying to put together a fools guide on this. I found milling machines a lot easier then this lathe stuff.

Chaz wrote: ↑Tue Sep 02, 2025 8:30 am It means you have Constant Surface Speed enabled in your output / post processing. Disable that, rerun the code and it will work without an encoder.

for G96 Constant Surface Speed no encoder is required, only for G99 Feed per Revolution and threading, tapping.

Uwe

suntravel wrote: ↑Tue Sep 02, 2025 12:02 pm

Chaz wrote: ↑Tue Sep 02, 2025 8:30 am It means you have Constant Surface Speed enabled in your output / post processing. Disable that, rerun the code and it will work without an encoder.

for G96 Constant Surface Speed no encoder is required, only for G99 Feed per Revolution and threading, tapping.

Uwe

I'm sure I've seen this before myself but you might be right. I was certain it was due to CSS, perhaps mistaken.