Spindle Step/Dir servo ramp down before stop on M stop command.

Hello Andy, Nojo and all the linuxcnc community, I have a small question: is it possible to use your Axis C configuration with a simple lPT card, for my tests, use only the // port. I want to use MESA cards later on, but I would like to see how it works, if so, can you tell me more to pass the port // configuration, I'll keep you informed of my progress.my current configuration is: servo AASD 15 z (2.3 kw 12n) x (1kw 10n) spindle motor asynchronous 5.5kw with VDF ALTIVAR 31 + encoder 200 pts
attached, g -code for axis c, it is a test that worked with the examples of linuxcnc:

Sincerely [attachment

If you replace all the mesa stepgens and encoder counters with hal (software) versions and wire up to the parport it should work. However you are very likely to lose encoder counts at higher spindle speeds unless you use a low-count encoder.

yes Andy, it is already the case when I simulate a thread with an encoder of 1024 pts, it is to make me a first idea, according to you, I should not exceed 200trs/mm? and what can I expect with a mesa card and an encoder of 1024pts,and a last question, (for the moment;-)) can I remain in version 2.7.14 or it is necessary to update to 2.8 for your configuration ?

A Mesa card can count at something like 10Mhz. It's very rarely a problem.

Yes, that's what I thought, the Mesa are the top according to what I saw on the forum, tell me, can you confirm that I can stay in 2.7. 14 ? Thanks Andy

I don't think it makes sense to add an extra processor. LinuxCNC can do all that is required. See, for example, the sim config sim->axis->vismach->vmc-toolchange

Where do I find sim config sim->axis->vismach->vmc-toolchange? I don't find it on my installation..

In my current wiring from the base machine to the X axis/ATC location I have 10 wires with signal to the ATC, and 10 with signals from the ATC, all to/from the 7i76 MESA card, as well as various power supplies, etc, This would have to be sufficient to control/monitor the ATC and the small milling spindle. I guess the number of I/O should be sufficient, so I am going to follow your suggestion and leave it to LinuxCNC to manage..
I will go through your references and learn, hopefully.
The ATC hardware is still a few weeks away.