punching machine

M100- info is here.

www.linuxcnc.org/docview/html/gcode_main.html#sec:M100-to-M199:

John

anpe wrote:

I'm going to do it by using M101 user command. Is it possible?

It is possible, but using M62 / M63 might be easier. They toggle the value of the motion.digital-out pins.

If you want to use M101, then a bash script with

#!bash
halcmd setp parport.0.pin-10-out 1

Might be enough.

anpe wrote:

he string "halcmd setp parport.0.pin-10-out 1" sets pin10 to True. How can I know current pin value?

I depends on "where" you want to know.
Do you want to know (use Halmeter and Halscope, and possibly Pyvcp)
Do you want the bash script to know? (In which case I am not sure)
Do you want the G-code program to know (then see the M66 command)
Do you want the value in HAL? In which case there are a number of ways to do it.

I would suggest starting by reading this page, it explains a bit of how signals flow in EMC2. The commands there can either be run in a bash script, or in the startup scripts in the machine .hal file.
linuxcnc.org/docs/html/hal_basic_hal.html

M62 and M63 are the best way to proceed though, I think, rather than M101