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Poti for overrides

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6 years 2 months ago - 6 years 2 months ago #179100 by Daniel_D_Punkt
Poti for overrides was created by Daniel_D_Punkt
Hi guys,

i have a test setup for a pendant with a MESA 7i73 and connected a potentiometer to halui.rapid-override.counts. The slider in the axis GUI also moves from 0...100%. Now I leave the potentiometer at 50% and restart LinuxCNC. After the restart the user interface shows 100% although the potentiometer is still set to 50%. Only after I turn the potentiometer a little bit and the value changes, it is also shown in the user interface (it jumps immediately to 50%). Is that supposed to be like this? Is there a way that Linuxcnc reads the value of the potis at startup and sets the slider accordingly.

I can imagine to put the 3.3V for the potentiometer on an output of the 7i73 which I switch to 3V3 when loading the HAL to get this effect. But this should only be a workarround and I hope that someone of you can tell me what I did wrong.

Code:
setp halui.rapid-override.direct-value true setp halui.rapid-override.count-enable true setp hm2_7i76e.0.7i73.0.2.analogin0-scalemax 100 setp halui.rapid-override.scale 0.01 net analog0 <= hm2_7i76e.0.7i73.0.2.analogin0 net analog0 => conv_float_s32.rapid.in net rapid-override <= conv_float_s32.rapid.out net rapid-override => halui.rapid-override.counts

I am working with version 2.8.0-pre1-6125.

Thanks
Daniel
Last edit: 6 years 2 months ago by Daniel_D_Punkt.

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6 years 2 months ago #179204 by roland
Replied by roland on topic Poti for overrides
Hi Daniel,

the behaviour of the potentiometers is really annoying.
i have solved this with mux-generic.

When the machine is switched off, the potentiometer value is set to 100%.
If the machine is switched on, the real potentiometer value is used.
Code:
###################################################### ## Feed-Override ## mit Poti ###################################################### loadrt mux_generic config=fs2 addf mux-gen.00 servo-thread addf hyst.feedpot servo-thread setp hyst.feedpot.gain 0.05 setp hyst.feedpot.deadband 0.7 setp hyst.feedpot.step 0.05 setp hm2_7i92.0.7i84.0.2.analogin0-scalemax 240 setp halui.feed-override.direct-value true setp halui.feed-override.count-enable true setp halui.feed-override.scale 0.01 setp mux-gen.00.in-float-00 100 net feedpot-raw hyst.feedpot.in net feedpot-hyst hyst.feedpot.out mux-gen.00.in-float-01 net machine-is-on mux-gen.00.sel-bit-00 net feedpot-mux mux-gen.00.out-s32 halui.feed-override.counts



--
Roland
The following user(s) said Thank You: Daniel_D_Punkt

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6 years 2 months ago #179207 by Daniel_D_Punkt
Replied by Daniel_D_Punkt on topic Poti for overrides
Hi Roland,

Thanks for the answer. This possibility has not yet occurred to me and I will try your solution. By the way, we have the same taste in housing :-)

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6 years 2 months ago #179211 by roland
Replied by roland on topic Poti for overrides
My Panel :)
The following user(s) said Thank You: keyboard, Himarc3D

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6 years 2 months ago #179375 by Daniel_D_Punkt
Replied by Daniel_D_Punkt on topic Poti for overrides
After I did some tests i have now come to the conclusion that i will use encoder instead of potis for feed-override, rapid-oberride and spindle-override. Since the 7i73 has only 4 encoder inputs and i still have the jogwheel, the jog-speed remains at one pot. This value can be written directly.

Code:
# >>> POTI Jog-Speed>>> setp hm2_7i76e.0.7i73.0.2.analogin0-scalemax 3600 net analog_jog <= hm2_7i76e.0.7i73.0.2.analogin0 net analog_jog => halui.axis.jog-speed # <<< POTI <<< # >>> Encoder Feed-Override >>> setp halui.feed-override.direct-value false setp halui.feed-override.count-enable true setp halui.feed-override.scale 0.1 net enc-feed <= hm2_7i76e.0.7i73.0.2.enc1.count net enc-feed => halui.feed-override.counts # <<< Encoder Feed-Override <<< # >>> Encoder Rapid-Override >>> setp halui.rapid-override.direct-value false setp halui.rapid-override.count-enable true setp halui.rapid-override.scale 0.1 net enc-rapid <= hm2_7i76e.0.7i73.0.2.enc2.count net enc-rapid => halui.rapid-override.counts # <<< Encoder Rapid-Override <<< # >>> Encoder Spindle-Override >>> setp halui.spindle.0.override.direct-value false setp halui.spindle.0.override.count-enable true setp halui.spindle.0.override.scale 0.1 net enc-spindle <= hm2_7i76e.0.7i73.0.2.enc3.count net enc-spindle => halui.spindle.0.override.counts # <<< Encoder Spindle-Override <<<

:)

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6 years 1 month ago #180616 by keyboard
Replied by keyboard on topic Poti for overrides
Hi Roland
I'm trying to use a POT as well for Feed override. After much searching found your reply. I have a 10k pot wired to a MESA 7i76e and can see the analog input. just having difficulty getting the slider to change on the GUI screen like yours. Could you share your HAL file, do you use a post GUI file as well ?
Thanks.

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