problen with debounce on sensor

PCW wrote:

setp db_x-home.delay 25
net raw-home-x hm2_7i96.0.gpio.001.in db_x-home.in
net home-x db_x-home.out

PCW wrote:

setp db_x-home.delay 25
net raw-home-x hm2_7i96.0.gpio.001.in db_x-home.in
net home-x db_x-home.out

snowgoer540 wrote:

Because the debounce time is usually so small, you probably won’t be able to notice it with Hal show.

You would be better watching this in halscope.

You could watch the db-xhome.in or the input pin itself and db-xhome.out. The output should be delayed by the time you have it debounced for.

snowgoer540 wrote:

I will look into seeing if there’s room to clarify what’s there a bit, and maybe post a link to the proper manual if it’s not there.

In the meantime did you check this one out:

linuxcnc.org/docs/html/man/man9/dbounce.9.html

It’s a bit tough to find because dbounce and debounce are really close, google serves up the wrong one.

Edit: The docs read ok to me. There is also already a link to the dbounce docs in the debounce area of the qtplasmac user guide. I think the confusion is that google serves up the wrong doc because it thinks it should be spelled “debounce”. At any rate, I think specific examples for debouncing limit switch, etc. would be outside the scope of the qtplasmac docs.

If debounce is required for other equipment like home or limit switches etc then more dbounce components may added in any of the HAL files without any regard to the signals listed here.

snowgoer540 wrote:

Clive wrote:

This line

If debounce is required for other equipment like home or limit switches etc then more dbounce components may added in any of the HAL files without any regard to the signals listed here.

changes from debounce to dbounce

That seems right to me. The first mention is talking about debouncing a switch, and the second is referring to the component "dbounce".

This is what was generated with my version of QTplasmaC

# ---PLASMA INPUT DEBOUNCE---
#values for these are in custom.hal ... but there was nothing generated in the custom hal
loadrt dbounce names=db_breakaway,db_float,db_ohmic,db_arc-ok
addf db_float servo-thread
addf db_ohmic servo-thread
addf db_breakaway servo-thread
addf db_arc-ok servo-thread

So I could not find the values anywhere, nor could I understand how to do it. The good thing is I learnt a lot .

I do appreciate all the help

How long ago did you make your config? I had a few backups people have posted on here over the last few weeks, only one of them had this stuff in custom.hal:

# for the float and ohmic inputs each increment in delay is
# is a 0.001mm (0.00004") increase in any probed height result
setp db_float.delay     5
setp db_ohmic.delay     5
setp db_breakaway.delay 5
setp db_arc-ok.delay    5

So either they took them out, or they aren't always getting put in for some reason. One reason I can see is if custom.hal already existed, but had nothing in it, it would not get that extra stuff. I am not sure in what cases this could be true, but from my 10s of looking at it, that's what I saw.

I will try to remember to check it out after work, but Phill might have to take a peek when he's back from vacation, and see if anything fishy is up.

setp db_float.delay 5