Question about matrix_kb

Hello,
I'm using matrix_kb to decode a keyboard and the inputs are also connected to rotary switches . The button work just fine but for some reason I can't get it to work well with the rotary switches . If I turn the quickly sometimes the position is wrong . And for jog increment that is not acceptable . I played around with the user thread but that does not seem to help . Right now it's at 2ms .
Also I'll need to add multiplexed outputs. I looked at the code but with my limited knowledge I couldn't understand how to implement that .

Cheers
Nikolai

what you means for rotary switch? ... similar to 0,1,2,3, ..... selector switch (these link show one )? or rotary encoder (these other show this one) .... for shure is possible a simulation of rotary encoder for jog increment use .... I think you must use first debounce comp for filtering electrical noise .... than you can use all input pin (I hope 4-6 max) for detect when you rotate to sx or dx .... after these you are able to perform an encoder counter to use for jog positioning .... but it is one thing to do if you have no other solutions. Once you have your encoder signal can follow these link ....

N.B. a rouge and nasty encoder perform 512 pulse/revolution (some old one 128ppr ... but I know some simple and plastic you can find on ebay +/- 7-16£/$) .... so you have at last 512x4 count for revolution ... more than rotary switch. ....

I hope these help
Giorgio

The inputs are from selector switches . They are wired in binary code . Two are two bit and one of them is three bits long . Axis selection, Jog increment and jog speeds . The component sometimes misses the signal from the switch . If you use it slowly it works but in practice it could be necessary to change the jog speed quickly and instead of the slowest setting it sometimes returns the signals for the fastest setting . Direct wiring would fix this all together but I'd like to keep this original . This being a selector switch I'd assume they give the correct combination for the position every time .

What does this component react to ? The state or the transition between states ?

Cheers

forum.linuxcnc.org/24-hal-components/28839-smoother-jog

these is yours old post? So ArcEye explain to you real well as it work.... your post is from 2012 and i suppose you use sometime your machine .... so the suspect is your contact is a little bit dirty or worn .... you feel this would be? have you checked?

For shure there is a man for matrix_kb ... github.com/LinuxCNC/linuxcnc/blob/master...man/man9/matrix_kb.9 .... and you can find out the code and read it the code ...You can?

thanks I not know these comp ....but I see something of souspicius for your case :

Perform all requested functions. Should be run in a slow thread for effective debouncing.

so if slow thread is from 250ms to 20ms for example and if you rotate very quickly ... I do not think you can take advantage of debouncing ... so the result that you will not be sequential but random .... 20ms is not an amount of time so small ... it is still faintly perceptible by man ... so that human actions must also take account of this little time ....

so the best approach for jogging is use encoder ....

i hope these help.
giorgio

I think you might be better off using a mux component for your rotary switches. mux4 gives you the 2 bit solution. Nothing gets triggered on an edge so it will be more reliable

Here is how I did it for encoder scale selection. Some people have liked the little tutorial I wrote as part of my build.

forum.linuxcnc.org/show-your-stuff/32029...utter-build?start=20

@rodow: well done!

giorgio