What am I doing wrong?

[terry1956]

Hi, I converted my mini lathe to cnc using centroid cnc to control the machine. However after spending more time then I wish watching videos on how the lathe should function I am at a loss why it doesn't.
Centroid manual I find detailed in certain parts, and totally misleading in other sections.
So I have fitted home switches and the machine can home itself like it should. I have been able to calibrate both axis.
Centroid state that the next step after homing the machine is to let the machine no the position of the material to machine. I have set the tool and set the z axis to zero and the x axis to the material diameter.
So far so good.i down load a simple turning part produced using fusion360. But on starting the program the tool just moving along the Z+ direction and I need to stop the program before it damages the machine.
No member how many simple g-code programs I load, the machine just does the same.
Anyone have any ideas what's going wrong. Thanks

[Muzzer]

Probably best to ask on the Centroid forum which provides excellent support. I assume you've used an Acorn, in which case, this is the link https://centroidcncforum.com/viewforum.php?f=60

You might need to post a short video showing what you are doing and you should then get a pretty quick diagnosis. It can't a big issue!

There are several steps to get right. Are you in G53 (machine coords) or G54 (work coords)? How did you set the material diameter? Did you use G43 to specify the offset for the tool you have called? Did you use the correct Fusion post processor option (depends on whether the tool is in front or behind, in a turret etc)? It's not possible to say what the problem is from what you have said.

There are quite a few Youtube videos showing how to get up and running with Acorn Lathe. While most relate to milling, there are plenty for lathe. I have both machine types running Acorn but like any complex system, it took a while to become confident and competent.