4th Axis rotation angle limit problem

Oe, that is dazzling

Let me give some of my basic here I left those out before:

XYZA configuration, nothing else configured yet (though I did try).
Spindle turned on manually

Want to try out milling acetal bearings with the 4th set up as a C-axis.
I have the contour ready to be milled in XZ plane and it shows up in axis.

I want to get my C axis to turn before the XZ movement starts and keep on turning untill all XZ movement is done.

It would be awsome if I could switch between position mode and velocity mode as it would open up a lot of problem solving options but for now I need to test if I can even make the bearings I have to make.

What do you think would be the quickest/best way to get there?

SvenH wrote:

What do you think would be the quickest/best way to get there?

Create a config where a velocity-mode stepgen has the velocity cmd linked to spindle speed. Then use M3 / M4 / M5 and S to control that axis. You can do this easily if you have a manually-switched milling spindle.

Oh boy, I feel so close to my goal yet so inapt to folow your lead...

I understand the basic of what you say and I think that I can use stepconf to make the configuration that includes the spindle. Beyond that I get lost in the technical lingo.

Do I set up all the pins for the spindle or can I leave some out because the stepper will not use them all?

Then, how can I make it the easiest for you to help me get to the finish line?

SvenH wrote:

Do I set up all the pins for the spindle or can I leave some out because the stepper will not use them all?

It's probably easiest to create an XYZA config in stepconf, including a spindle.

Then make a copy of that whold config directory, to have backup.

Then edit the HAL file to convert the A stepgen to velocity mode, and to link it to the spindle speed command, cutting out the bits that are not useful.

Then start LinuxCNC from the command line, and you will see error messages that explain what is wrong if/when it fails to start. Probably missing or miss-spelled pin names, for example. Keep fiddling till it works.

Well, gave it a start but find myself lost... searching for answers only offers up more questions...
There is so much information that I can not make sense of it..

Is what I am trying to do so unusual that it is not standard in cnc-ing?

SvenH wrote:

Well, gave it a start but find myself lost... searching for answers only offers up more questions...

That's OK, just ask them

Zip up the config directory and post it here as an attached file if you want.