Spindle Enable Input

Hello,

I'm currently trying to wire up my lathe using the 5i25/7i76 combo boards. My lathe has a manual and an automatic switch that allows me to run it manually (using a pot) or automatically using LinuxCNC and the MESA boards. The automatic configuration is already wired and operational. Is there a way for me to bypass the automatic configuration and run it in manually by disabling the spindle feature in LinuxCNC using a configured hal pin? The manual/automatic switch currently pulls low when it manual. When set in automatic the signal floats. Any help would be appreciated.

Regards,

A relay wred to one of the outputs on 7i76 can do that easily.
If you need Linuxcnc to put that on automatic when running, wire the relay contacts in series with the existing switch. If you need to switch from Linuxcnc to auto or manual, wire relay contacts in parallel with existing switch.
You have to add a line or two in hal also.

Thanks for the feedback but I'm trying not to integrate a relay. There is a HAL pin called "motion.spindle-inhibit". Is there a way to configure my 5i25/7i76 HAL file with a pull up resistor and link it with the "motion.spindle-inhibit" pin? This way when I switch to automatic, it will pull up and operate via LinuxCNC. When I switch to manual, it will pull down, disable the LinuxCNC spindle control, and allow me operate it via the manual pot.

It is not advisable to connect it directly, it must have some kind of isolation between Mesa and machine. And relays are cheap and can be found easily.

Ok, thanks. I put an order in for a relay. It'll arrive in two weeks. I'll integrate it to isolate Mesa with the machine as you suggested.

sg wrote: Is there a way for me to bypass the automatic configuration and run it in manually by disabling the spindle feature in LinuxCNC using a configured hal pin?

There probably is a way, or several ways. But you might find that it isn't worth the time.
I went to some lengths to allow manual operation of my first 2 CNC machine conversions. And never used the facility.
On the 3rd machine (a lathe) I didn't bother. I can still use it as a semi-manual machine by using the jogwheels, and that is good enough. (as a plus, I get manual CSS mode that way)