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Charge Pump BASE_PERIOD = 100000 12,5kHz 5khz

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Adam Maszynotwór
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08 Dec 2018 13:41 #122051 by Adam Maszynotwór

Charge Pump BASE_PERIOD = 100000 12,5kHz 5khz was created by Adam Maszynotwór

Hey
(he wrote via Google translator)
LinuxCNC 2.7.14
I met with a strange problem:
I wanted to use the Charge pump for safety
has 2 PC and 1 laptop
Latency Test:
PC1 8000
PC2 16000
A laptop about 25000

When I make configurations in stepconf Wizard, regardless of what result I type, I always receive in INI.

BASE_PERIOD = 100,000
SERVO_PERIOD = 1,000,000

It seems to me that the result entered in the stepconf Wizard should change the above values.

Additionally
PC1 generates on PIN 17 5kHz PIN
PC2 generates on PIN 17 500Hz
The laptop generates PIN 17 5kHz PIN

for those since everyone has INI. ?
BASE_PERIOD = 100000
SERVO_PERIOD = 1000000

why PC2 with a better result gives only 500HZ for
BASE_PERIOD = 100000
a laptop with a worse result dje 5kHZ for
BASE_PERIOD = 100000

it seems to me that the instructions say that the frequency of the pump is calculated from BASE_PERIOD so it does not understand why PC2 gets only 500hz

Thank you for your help and forbearance

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andypugh
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11 Dec 2018 14:53 - 11 Dec 2018 14:54 #122212 by andypugh

Replied by andypugh on topic Charge Pump BASE_PERIOD = 100000 12,5kHz 5khz

You can edit the INI file to change the base period.

I think that stepconf chooses a long base period if the maximum step rate required can still be achieved.

github.com/LinuxCNC/linuxcnc/blob/master...onf/stepconf.py#L483

But apparently stepconf is not basing that on your required charge pump frequency.

As for the 500Hz from the laptop, is that actually running a realtime kernel? and is the charge pump in the base thread or in the servo thread?

Last edit: 11 Dec 2018 14:54 by andypugh.

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Adam Maszynotwór
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12 Dec 2018 14:15 #122265 by Adam Maszynotwór

Replied by Adam Maszynotwór on topic Charge Pump BASE_PERIOD = 100000 12,5kHz 5khz

It seems to me a mistake.
For this we use the stepconf Wizard to calculate the contents of the INI file well.
And now, regardless of the values entered in Base Period Maximum Jitter, we get the same result in ini. (often inflated)
I know that I can edit the INI files myself, but for that I use the stepconf Wizard to calculate, for example, BASE_PERIOD for me

It used to work well (I made old configurations of other machines and BASE_PERIOD values were there adequate to the results of the latency test)

now I have found a spreadsheet and I will change BASE_PERIOD in INI based on it

wiki.linuxcnc.org/cgi-bin/wiki.pl?Tweaki...ftwareStepGeneration

when it comes to pump problem, you did not talk about the laptop, it's OK:
PC1 generates on PIN 17 5kHz is OK (latency test = 7000)
PC2 generates on PIN 17 500Hz It's bad (latency test = 16000)
The laptop generates PIN 17 5kHz is OK (latency test = 25,000)

So the laptop, despite the fact that the latency test has the worst, still generates 5khz correctly

This PC2 has a problem despite a good result of 16,000 (of course, BASE_PERIOD = 100,000 because this is how the wizard generates) only 500hz
all machines have the latest version of linuxcnc
and a new clean configuration was made via the stepconf Wizard with the use of a charge pump

I confirm in HAL the charge pump signal is associated with BASE_PERIOD (because it implicitly binds the stepconf Wizard)

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PCW
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12 Dec 2018 16:23 #122274 by PCW

Replied by PCW on topic Charge Pump BASE_PERIOD = 100000 12,5kHz 5khz

Can you post the generated hal/ini files? Its really difficult to determine whats actually happening here with no detailed information

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Adam Maszynotwór
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13 Dec 2018 15:14 #122372 by Adam Maszynotwór

Replied by Adam Maszynotwór on topic Charge Pump BASE_PERIOD = 100000 12,5kHz 5khz

PC2 "Max Jitter" 16000 Charge pump only 500Hz

# Generated by stepconf 1.1 at Thu Dec 13 13:18:30 2018
# Jeśli zmodyfikujesz ten plik zmainy zostaną
# nadpisane gdy uruchomisz ponownie Stepconf

[EMC]
MACHINE = moja-frezarka
DEBUG = 0

[DISPLAY]
DISPLAY = axis
EDITOR = gedit
POSITION_OFFSET = RELATIVE
POSITION_FEEDBACK = ACTUAL
ARCDIVISION = 64
GRIDS = 10mm 20mm 50mm 100mm 1in 2in 5in 10in
MAX_FEED_OVERRIDE = 1.2
MIN_SPINDLE_OVERRIDE = 0.5
MAX_SPINDLE_OVERRIDE = 1.2
DEFAULT_LINEAR_VELOCITY = 2.50
MIN_LINEAR_VELOCITY = 0
MAX_LINEAR_VELOCITY = 25.00
INTRO_GRAPHIC = linuxcnc.gif
INTRO_TIME = 5
PROGRAM_PREFIX = /home/cnc/linuxcnc/nc_files
INCREMENTS = 5mm 1mm .5mm .1mm .05mm .01mm .005mm

[FILTER]
PROGRAM_EXTENSION = .png,.gif,.jpg Greyscale Depth Image
PROGRAM_EXTENSION = .py Python Script
png = image-to-gcode
gif = image-to-gcode
jpg = image-to-gcode
py = python

[TASK]
TASK = milltask
CYCLE_TIME = 0.010

[RS274NGC]
PARAMETER_FILE = linuxcnc.var

[EMCMOT]
EMCMOT = motmod
COMM_TIMEOUT = 1.0
COMM_WAIT = 0.010
BASE_PERIOD = 100000
SERVO_PERIOD = 1000000

[HAL]
HALFILE = moja-frezarka.hal
HALFILE = custom.hal
POSTGUI_HALFILE = custom_postgui.hal

[TRAJ]
AXES = 3
COORDINATES = X Y Z
LINEAR_UNITS = mm
ANGULAR_UNITS = degree
CYCLE_TIME = 0.010
DEFAULT_VELOCITY = 2.50
MAX_VELOCITY = 25.00

[EMCIO]
EMCIO = io
CYCLE_TIME = 0.100
TOOL_TABLE = tool.tbl

[AXIS_0]
TYPE = LINEAR
HOME = 0.0
MAX_VELOCITY = 25.0
MAX_ACCELERATION = 750.0
STEPGEN_MAXACCEL = 937.5
SCALE = 80.0
FERROR = 1
MIN_FERROR = .25
MIN_LIMIT = -0.001
MAX_LIMIT = 200.0
HOME_OFFSET = 0.0

[AXIS_1]
TYPE = LINEAR
HOME = 0.0
MAX_VELOCITY = 25.0
MAX_ACCELERATION = 750.0
STEPGEN_MAXACCEL = 937.5
SCALE = 80.0
FERROR = 1
MIN_FERROR = .25
MIN_LIMIT = -0.001
MAX_LIMIT = 200.0
HOME_OFFSET = 0.0

[AXIS_2]
TYPE = LINEAR
HOME = 0.0
MAX_VELOCITY = 25.0
MAX_ACCELERATION = 750.0
STEPGEN_MAXACCEL = 937.5
SCALE = 80.0
FERROR = 1
MIN_FERROR = .25
MIN_LIMIT = -100.0
MAX_LIMIT = 0.001
HOME_OFFSET = 0.0

# Generated by stepconf 1.1 at Thu Dec 13 13:18:30 2018
# JeĹ›li zmodyfikujesz ten plik zmainy zostanÄ…
# nadpisane gdy uruchomisz ponownie Stepconf
loadrt trivkins
loadrt [EMCMOT]EMCMOT base_period_nsec=[EMCMOT]BASE_PERIOD servo_period_nsec=[EMCMOT]SERVO_PERIOD num_joints=[TRAJ]AXES
loadrt hal_parport cfg="0x378 out"
setp parport.0.reset-time 5000
loadrt stepgen step_type=0,0,0
loadrt charge_pump
net estop-out charge-pump.enable iocontrol.0.user-enable-out
net charge-pump <= charge-pump.out

addf parport.0.read base-thread
addf stepgen.make-pulses base-thread
addf charge-pump base-thread
addf parport.0.write base-thread
addf parport.0.reset base-thread

addf stepgen.capture-position servo-thread
addf motion-command-handler servo-thread
addf motion-controller servo-thread
addf stepgen.update-freq servo-thread
net spindle-cmd-rpm     <= motion.spindle-speed-out
net spindle-cmd-rpm-abs <= motion.spindle-speed-out-abs
net spindle-cmd-rps     <= motion.spindle-speed-out-rps
net spindle-cmd-rps-abs <= motion.spindle-speed-out-rps-abs
net spindle-at-speed    => motion.spindle-at-speed
net spindle-on <= motion.spindle-on
net spindle-ccw <= motion.spindle-reverse

net estop-out       => parport.0.pin-01-out
net xstep           => parport.0.pin-02-out
setp parport.0.pin-02-out-reset 1
net xdir            => parport.0.pin-03-out
net ystep           => parport.0.pin-04-out
setp parport.0.pin-04-out-reset 1
net ydir            => parport.0.pin-05-out
net zstep           => parport.0.pin-06-out
setp parport.0.pin-06-out-reset 1
net zdir            => parport.0.pin-07-out
net astep           => parport.0.pin-08-out
setp parport.0.pin-08-out-reset 1
net adir            => parport.0.pin-09-out
net spindle-on      => parport.0.pin-14-out
net spindle-ccw     => parport.0.pin-16-out
net charge-pump     => parport.0.pin-17-out

setp stepgen.0.position-scale [AXIS_0]SCALE
setp stepgen.0.steplen 1
setp stepgen.0.stepspace 0
setp stepgen.0.dirhold 40000
setp stepgen.0.dirsetup 40000
setp stepgen.0.maxaccel [AXIS_0]STEPGEN_MAXACCEL
net xpos-cmd axis.0.motor-pos-cmd => stepgen.0.position-cmd
net xpos-fb stepgen.0.position-fb => axis.0.motor-pos-fb
net xstep <= stepgen.0.step
net xdir <= stepgen.0.dir
net xenable axis.0.amp-enable-out => stepgen.0.enable

setp stepgen.1.position-scale [AXIS_1]SCALE
setp stepgen.1.steplen 1
setp stepgen.1.stepspace 0
setp stepgen.1.dirhold 40000
setp stepgen.1.dirsetup 40000
setp stepgen.1.maxaccel [AXIS_1]STEPGEN_MAXACCEL
net ypos-cmd axis.1.motor-pos-cmd => stepgen.1.position-cmd
net ypos-fb stepgen.1.position-fb => axis.1.motor-pos-fb
net ystep <= stepgen.1.step
net ydir <= stepgen.1.dir
net yenable axis.1.amp-enable-out => stepgen.1.enable

setp stepgen.2.position-scale [AXIS_2]SCALE
setp stepgen.2.steplen 1
setp stepgen.2.stepspace 0
setp stepgen.2.dirhold 40000
setp stepgen.2.dirsetup 40000
setp stepgen.2.maxaccel [AXIS_2]STEPGEN_MAXACCEL
net zpos-cmd axis.2.motor-pos-cmd => stepgen.2.position-cmd
net zpos-fb stepgen.2.position-fb => axis.2.motor-pos-fb
net zstep <= stepgen.2.step
net zdir <= stepgen.2.dir
net zenable axis.2.amp-enable-out => stepgen.2.enable

net estop-out <= iocontrol.0.user-enable-out
net estop-out => iocontrol.0.emc-enable-in

loadusr -W hal_manualtoolchange
net tool-change iocontrol.0.tool-change => hal_manualtoolchange.change
net tool-changed iocontrol.0.tool-changed <= hal_manualtoolchange.changed
net tool-number iocontrol.0.tool-prep-number => hal_manualtoolchange.number
net tool-prepare-loopback iocontrol.0.tool-prepare => iocontrol.0.tool-prepared

Laptop "Max Jitter" 25000 Charge pump 5kHz

# Generated by stepconf 1.1 at Thu Dec 13 15:58:31 2018
# Jeśli zmodyfikujesz ten plik zmainy zostaną
# nadpisane gdy uruchomisz ponownie Stepconf

[EMC]
MACHINE = moja-frezarka
DEBUG = 0

[DISPLAY]
DISPLAY = axis
EDITOR = gedit
POSITION_OFFSET = RELATIVE
POSITION_FEEDBACK = ACTUAL
ARCDIVISION = 64
GRIDS = 10mm 20mm 50mm 100mm 1in 2in 5in 10in
MAX_FEED_OVERRIDE = 1.2
MIN_SPINDLE_OVERRIDE = 0.5
MAX_SPINDLE_OVERRIDE = 1.2
DEFAULT_LINEAR_VELOCITY = 2.50
MIN_LINEAR_VELOCITY = 0
MAX_LINEAR_VELOCITY = 25.00
INTRO_GRAPHIC = linuxcnc.gif
INTRO_TIME = 5
PROGRAM_PREFIX = /home/cnc/linuxcnc/nc_files
INCREMENTS = 5mm 1mm .5mm .1mm .05mm .01mm .005mm

[FILTER]
PROGRAM_EXTENSION = .png,.gif,.jpg Greyscale Depth Image
PROGRAM_EXTENSION = .py Python Script
png = image-to-gcode
gif = image-to-gcode
jpg = image-to-gcode
py = python

[TASK]
TASK = milltask
CYCLE_TIME = 0.010

[RS274NGC]
PARAMETER_FILE = linuxcnc.var

[EMCMOT]
EMCMOT = motmod
COMM_TIMEOUT = 1.0
COMM_WAIT = 0.010
BASE_PERIOD = 100000
SERVO_PERIOD = 1000000

[HAL]
HALFILE = moja-frezarka.hal
HALFILE = custom.hal
POSTGUI_HALFILE = custom_postgui.hal

[TRAJ]
AXES = 3
COORDINATES = X Y Z
LINEAR_UNITS = mm
ANGULAR_UNITS = degree
CYCLE_TIME = 0.010
DEFAULT_VELOCITY = 2.50
MAX_VELOCITY = 25.00

[EMCIO]
EMCIO = io
CYCLE_TIME = 0.100
TOOL_TABLE = tool.tbl

[AXIS_0]
TYPE = LINEAR
HOME = 0.0
MAX_VELOCITY = 25.0
MAX_ACCELERATION = 750.0
STEPGEN_MAXACCEL = 937.5
SCALE = 80.0
FERROR = 1
MIN_FERROR = .25
MIN_LIMIT = -0.001
MAX_LIMIT = 200.0
HOME_OFFSET = 0.0

[AXIS_1]
TYPE = LINEAR
HOME = 0.0
MAX_VELOCITY = 25.0
MAX_ACCELERATION = 750.0
STEPGEN_MAXACCEL = 937.5
SCALE = 80.0
FERROR = 1
MIN_FERROR = .25
MIN_LIMIT = -0.001
MAX_LIMIT = 200.0
HOME_OFFSET = 0.0

[AXIS_2]
TYPE = LINEAR
HOME = 0.0
MAX_VELOCITY = 25.0
MAX_ACCELERATION = 750.0
STEPGEN_MAXACCEL = 937.5
SCALE = 80.0
FERROR = 1
MIN_FERROR = .25
MIN_LIMIT = -100.0
MAX_LIMIT = 0.001
HOME_OFFSET = 0.0

# Generated by stepconf 1.1 at Thu Dec 13 15:58:31 2018
# JeĹ›li zmodyfikujesz ten plik zmainy zostanÄ…
# nadpisane gdy uruchomisz ponownie Stepconf
loadrt trivkins
loadrt [EMCMOT]EMCMOT base_period_nsec=[EMCMOT]BASE_PERIOD servo_period_nsec=[EMCMOT]SERVO_PERIOD num_joints=[TRAJ]AXES
loadrt hal_parport cfg="0 out"
setp parport.0.reset-time 5000
loadrt stepgen step_type=0,0,0
loadrt charge_pump
net estop-out charge-pump.enable iocontrol.0.user-enable-out
net charge-pump <= charge-pump.out
loadrt pwmgen output_type=1

addf parport.0.read base-thread
addf stepgen.make-pulses base-thread
addf charge-pump base-thread
addf pwmgen.make-pulses base-thread
addf parport.0.write base-thread
addf parport.0.reset base-thread

addf stepgen.capture-position servo-thread
addf motion-command-handler servo-thread
addf motion-controller servo-thread
addf stepgen.update-freq servo-thread
addf pwmgen.update servo-thread

net spindle-cmd-rpm => pwmgen.0.value
net spindle-on <= motion.spindle-on => pwmgen.0.enable
net spindle-pwm <= pwmgen.0.pwm
setp pwmgen.0.pwm-freq 100.0
setp pwmgen.0.scale 1166.66666667
setp pwmgen.0.offset 0.114285714286
setp pwmgen.0.dither-pwm true
net spindle-cmd-rpm     <= motion.spindle-speed-out
net spindle-cmd-rpm-abs <= motion.spindle-speed-out-abs
net spindle-cmd-rps     <= motion.spindle-speed-out-rps
net spindle-cmd-rps-abs <= motion.spindle-speed-out-rps-abs
net spindle-at-speed    => motion.spindle-at-speed
net spindle-cw <= motion.spindle-forward

net estop-out       => parport.0.pin-01-out
net xstep           => parport.0.pin-02-out
setp parport.0.pin-02-out-reset 1
net xdir            => parport.0.pin-03-out
net ystep           => parport.0.pin-04-out
setp parport.0.pin-04-out-reset 1
net ydir            => parport.0.pin-05-out
net zstep           => parport.0.pin-06-out
setp parport.0.pin-06-out-reset 1
net zdir            => parport.0.pin-07-out
net astep           => parport.0.pin-08-out
setp parport.0.pin-08-out-reset 1
net adir            => parport.0.pin-09-out
net spindle-cw      => parport.0.pin-14-out
net spindle-pwm     => parport.0.pin-16-out
net charge-pump     => parport.0.pin-17-out

setp stepgen.0.position-scale [AXIS_0]SCALE
setp stepgen.0.steplen 1
setp stepgen.0.stepspace 0
setp stepgen.0.dirhold 45000
setp stepgen.0.dirsetup 45000
setp stepgen.0.maxaccel [AXIS_0]STEPGEN_MAXACCEL
net xpos-cmd axis.0.motor-pos-cmd => stepgen.0.position-cmd
net xpos-fb stepgen.0.position-fb => axis.0.motor-pos-fb
net xstep <= stepgen.0.step
net xdir <= stepgen.0.dir
net xenable axis.0.amp-enable-out => stepgen.0.enable

setp stepgen.1.position-scale [AXIS_1]SCALE
setp stepgen.1.steplen 1
setp stepgen.1.stepspace 0
setp stepgen.1.dirhold 45000
setp stepgen.1.dirsetup 45000
setp stepgen.1.maxaccel [AXIS_1]STEPGEN_MAXACCEL
net ypos-cmd axis.1.motor-pos-cmd => stepgen.1.position-cmd
net ypos-fb stepgen.1.position-fb => axis.1.motor-pos-fb
net ystep <= stepgen.1.step
net ydir <= stepgen.1.dir
net yenable axis.1.amp-enable-out => stepgen.1.enable

setp stepgen.2.position-scale [AXIS_2]SCALE
setp stepgen.2.steplen 1
setp stepgen.2.stepspace 0
setp stepgen.2.dirhold 45000
setp stepgen.2.dirsetup 45000
setp stepgen.2.maxaccel [AXIS_2]STEPGEN_MAXACCEL
net zpos-cmd axis.2.motor-pos-cmd => stepgen.2.position-cmd
net zpos-fb stepgen.2.position-fb => axis.2.motor-pos-fb
net zstep <= stepgen.2.step
net zdir <= stepgen.2.dir
net zenable axis.2.amp-enable-out => stepgen.2.enable

net estop-out <= iocontrol.0.user-enable-out
net estop-out => iocontrol.0.emc-enable-in

loadusr -W hal_manualtoolchange
net tool-change iocontrol.0.tool-change => hal_manualtoolchange.change
net tool-changed iocontrol.0.tool-changed <= hal_manualtoolchange.changed
net tool-number iocontrol.0.tool-prep-number => hal_manualtoolchange.number
net tool-prepare-loopback iocontrol.0.tool-prepare => iocontrol.0.tool-prepared

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PCW
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Moderator

13 Dec 2018 18:00 #122378 by PCW

Replied by PCW on topic Charge Pump BASE_PERIOD = 100000 12,5kHz 5khz

I dont actually see any significant differences in the hal/ini files

I think I would try the "500 Hz" file set on the "5000 Hz" machine or vice versa

It may in fact be a hardware issue in the "500 Hz" machine

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