Wiring Linuxcnc to stepper drivers

Hello users

I have one simple question:

Can I wire the cable directly from parallel port to a stepper driver input pulse connector?

My machine runs well but the wiring is based on DIY board which I don't understand. I would like to add x,y,z limits and one more switch to measure the tool height. As far as I understand: If we can configure 5V signals to one of the LPT pins, this should work just by direct connection between LPT and a stepper driver input - am I right?

OK, that's great

The thing was to leave it as it is (because the 3 axis works as they should) but add limits and a probe by directly wiring them to the pins.

Thank's for the in put

You mean this problem => www.eng.utah.edu/~cs5780/debouncing.pdf ??

I will use microswitches so I don't suspect the bouncing problem... Or am I mistaken ?



COOL, All I need to to is to wire those microswitches in a loop between ground and a pin and then it will work as a charm! (This is my will spoken loudly )

Yeap, I would like to avoid this kind of false stops at a cost of rather not having the limits installed...

Anyway, thank you for your understanding, I am just trying to name problems and understand things clear enough to be able to deal with them and this is far from straightforward because my electronics skills are really low.

So I didn't think that swich can fool the machine... For me it was 0-1 kind of trigger.

You've mentioned HAL and seems that there is one thing more which is usually done by a break-out boards... It is understanding the signals sent by theese bouncing triggers as 0-1 signals which is obviously not happening when we wire the microswitches directly to the pins... So cool that it can be done via HAL but hell how? Now again I have something to read...

To make things simple, can you guide me through the HAL thing in this installation?
So far I started reading about how it works but I feel a bit uneasy that I may encounter some problems I won't b able to solve myself.

# 30 mins later... still reading about HAL basics... Seems that you basically could not write it easier... Anyway I still miss my knowledge but I'll do my best to understand what needs to be done...

#40 mins later=>> found what I need to add =>linuxcnc.org/docs/html/hal/rtcomps.html#_debounce
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