Lost Step Counter

DieselJoe
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8 years 2 weeks ago #118892 by DieselJoe

Replied by DieselJoe on topic Lost Step Counter

Debug file information:
.
./custom.hal:3: Warning: File contains DOS-style line endings.
./custom.hal:4: Pin 'miss_step.axis.0.pos-cmd' does not exist
7165
PID TTY STAT TIME COMMAND
Stopping realtime threads
Unloading hal components

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DieselJoe
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8 years 2 weeks ago #118898 by DieselJoe

Replied by DieselJoe on topic Lost Step Counter

I have to mention that I am running this test on a small laptop which is not my actual cnc PC, and has no real parallel port.
Linuxcnc version 2.7.8

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DieselJoe
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8 years 1 week ago #118946 by DieselJoe

Replied by DieselJoe on topic Lost Step Counter

Hi I get nowher at this point. I spent 3 days on it...
I know a bit programing in C (arduino), but It's is to much to chew for me...
Python langage, HAL, linuxcnc structure ...
At this point I have a custom panel on the side of main screen.
I can display two interesting things:
for X axis for instance:

halui.axis.0.pos-commanded (which seems to reset to Zero when homing)
xpos-cmd (which seems to remain very absolute)

with this we can imagine a variable which make the difference and give the deviation
"deviation" = "X" - "absoluteX" - "previous deviation"
and a reset button to give to "previous deviation" variable the value of "deviation"

???!!!???? HELP

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andypugh
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8 years 1 week ago #118950 by andypugh

Replied by andypugh on topic Lost Step Counter

Have you managed to get the file that I gave you to load as a HAL module?

It won't display anything until it is connected up in HAL.

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DieselJoe
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8 years 1 week ago #118951 by DieselJoe

Replied by DieselJoe on topic Lost Step Counter

Hi,
I believe YES, I think a mistake in the copy/past in your post introduced a little mistake.
p1 = .......JOINT.pos-cmd right? (joint was missing)
now linuxCNC run, and I see this new pins in the HalMeter
nothing appears when I force a Home, and the halMeter remain at "0"
But I think it is an improvement yet :-)

I start understanding how it works... maybe...

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andypugh
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8 years 1 week ago #118952 by andypugh

Replied by andypugh on topic Lost Step Counter

Do you have the HAL pins connected?

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DieselJoe
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8 years 1 week ago #118953 by DieselJoe

Replied by DieselJoe on topic Lost Step Counter

Sh...t I forgot this.
I was so happy to succeed running linuxcnc eventualy.
I do it right now

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DieselJoe
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8 years 1 week ago #118954 by DieselJoe

Replied by DieselJoe on topic Lost Step Counter

Now connected, I have your popup window working.
It show up asap I move the axis and just repeat the position.
Can you check the code and or the connection syntax?
But it's an improvement for my understanding of the system yet !
thank you
:-)

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DieselJoe
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8 years 1 week ago #118984 by DieselJoe

Replied by DieselJoe on topic Lost Step Counter

I think I made good progress during the last 12 hours...
I don't fully understand your code, but it was an inspiration.
I succeed making a code that seems to work.
Thank you a lot.

Code:

#!/usr/bin/python
import hal, time
h = hal.component("miss_step")

h.newpin("mot_off_x", hal.HAL_FLOAT, hal.HAL_IN)
h.newpin("joint_x", hal.HAL_FLOAT, hal.HAL_IN)
h.newpin("lost_x", hal.HAL_FLOAT, hal.HAL_OUT)
h.ready()





previous_offset_x = 0.00
try:
    while 1:
        time.sleep(1)
# make difference between previous offset and current offset, print the deviation if > 0.01
        if (h['mot_off_x']-previous_offset_x) >= 0.01 or (h['mot_off_x']-previous_offset_x) <= -0.01:
            h['lost_x'] = h['mot_off_x']-previous_offset_x
            previous_offset_x = h['mot_off_x']

# reset deviation display if joint has moved for more than 5mm
        if h['joint_x'] >= 5:
            h['lost_x'] = 0






except KeyboardInterrupt:
    raise SystemExit

and the connections:

Code:

net my-motoroffsetx miss_step.mot_off_x <= axis.0.motor-offset
net my-lost_x pyvcp.x-lostSteps <= miss_step.lost_x
net my-joint_x miss_step.joint_x <= axis.0.joint-pos-cmd

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andypugh
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8 years 1 week ago #118987 by andypugh

Replied by andypugh on topic Lost Step Counter

I don't understand why my code didn't just work for you, it worked when I tested it.
Perhaps the problem was that it was working perfectly and you had no problems? My version only pops-up the message when the homing offsets change.

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