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  • Tim Bee
  • Tim Bee
17 Nov 2024 10:46
Replied by Tim Bee on topic probe basic tool direction

probe basic tool direction

Category: QtPyVCP

@Lcvette

It's work! Thank you ^_^
  • Aciera
  • Aciera's Avatar
17 Nov 2024 10:37 - 17 Nov 2024 10:46
Replied by Aciera on topic How to move a variable value with G-code

How to move a variable value with G-code

Category: G&M Codes

If you do not need to interact with a running gcode program then you could simply use the pyhton interface to send mdi commands
import linuxcnc
s = linuxcnc.stat()
c = linuxcnc.command()

def ok_for_mdi():
s.poll()
return not s.estop and s.enabled and (s.homed.count(1) == s.joints) and (s.interp_state == linuxcnc.INTERP_IDLE)


x = 1.23
y = 2.34
if ok_for_mdi():
   c.mode(linuxcnc.MODE_MDI)
   c.wait_complete() # wait until mode switch executed
   c.mdi("G0 X%s Y%s " % (x, y))


If you need to interact with running Gcode then use 'motion.*' pins.

1.  Get your python script to create hal pins. Example:

import hal
self.hal = hal.component("vision")
self.hal.newpin("enable", hal.HAL_BIT, hal.HAL_IN)
self.hal.newpin("done", hal.HAL_BIT, hal.HAL_OUT)
self.hal.newpin("input_value", hal.HAL_FLOAT, hal.HAL_IN)
self.hal.newpin("output_value", hal.HAL_FLOAT, hal.HAL_OUT)
self.hal.ready()

2.  Connect those hal pins to motion.* pins. Example:

net camera-enable <= motion.digital-out-00 => vision.enable
net camera-done <= vision.done => motion.digital-in-00
net camera-val-in <= motion.analog-out-00 => vision.input-value
net camera-val-out <= vision.output-value => motion.analog-in-00

3. in gcode read the motion.* pins and store in a variable:

m66 p0 l3 q2    ; wait for vision.done to go HIGH with 2 seconds timeout
o100 if [#5399 le 0]    ; timeout occured
    #1000 = 0
    (DEBUG, vision: timeout)
o100 else
    m66 e0 l0    ; read vision.output-value which is stored in #5399
    #1000 = [#5399]
o100 endif
  • LabOuest
  • LabOuest
17 Nov 2024 10:15
Replied by LabOuest on topic Remora - ethernet NVEM / EC300 / EC500 cnc board

Remora - ethernet NVEM / EC300 / EC500 cnc board

Category: Computers and Hardware

Hello again,
I'm struggling with the infamous following error when I try to go faster than about 2300mm/min.
I'm running my steppers at 1000 steps/mm as is required by my application.
I've read through this topic and the stepper tuning doc but I can't seem to figured it out.
Does my servo thread latency matters ?
I'm still running the default configs beside the JOINT SCALE set to 1000.

I was also thinking that this issue could be due to the default signal timing being to long for remora to keep up.
How and where do I configure the stepgen timing with remora ?
See the attached timing requirements for my drivers.
 
  • Grotius
  • Grotius's Avatar
17 Nov 2024 09:29
Replied by Grotius on topic Trajectory Planner using Ruckig Lib

Trajectory Planner using Ruckig Lib

Category: General LinuxCNC Questions

@Collins,

Using a base thread of 20,000ns = 50.000 HZ

Example 0:
Suppose the encoder has P=10,000 pulses per revolution and the machine rotates at
R=3 revolutions per second.
f=10,000×3=30,000 Hz

Example 1:
Suppose the encoder has P=10,000 pulses per revolution and the machine rotates at
R=6 revolutions per second.
f=10,000×6=60,000 Hz

I see the problem. At high speeds, and high encoder resolution, it just can't keep
up with the second example.

***
For ethercat to get device information, i poked around in the etherlab's source and
found a solution.

Made a file to hold device data : device data struct (this data is equvalent to the "$ ehtercat xml" command.)
Add a few function's in the tool section of ethercat's source code : .h file   cpp.file
Recompile ethercat...

And then when we start the realtime app, it retrieves all the ethercat information there is by
using the get info function.

This works perfect.

We now have all the ethercat data (master info, slave info) at startup.
This is then the moment to automaticly create hal pins etc. Let's try this.
  • shaying526
  • shaying526
17 Nov 2024 09:23
How to move a variable value with G-code was created by shaying526

How to move a variable value with G-code

Category: G&M Codes

I'm a beginner, I need to use G-code to move a value that may change.
This value comes from my vision camera, which is used to correct the positional deviation of my workpiece.
What I can currently think of is to write a Python script to generate G-code each time before it is called.
What is a more common method to achieve this?
Which chapter of the document should I read?
  • LabOuest
  • LabOuest
17 Nov 2024 08:18
Replied by LabOuest on topic Remora - ethernet NVEM / EC300 / EC500 cnc board

Remora - ethernet NVEM / EC300 / EC500 cnc board

Category: Computers and Hardware

I understand, thank you Scotta.
  • Aciera
  • Aciera's Avatar
17 Nov 2024 08:10 - 17 Nov 2024 08:19
Replied by Aciera on topic Fast Hole EDM from Hacked Parts

Fast Hole EDM from Hacked Parts

Category: General LinuxCNC Questions

1. 'M52 P1' enables adaptive feed while 'M52 P0' disables it

2. you would bring that EDM output into HAL and create a logic that outputs a float value to the 'motion.adaptive-feed' pin. eg output some negative value if a short is detected and output 1.0 if no short is detected. That could be done using a mux2 component.

[Edit]
The range for the 'motion.adaptive-feed' pin in version 2.9 is -1..1.
In  master this has recently been expanded to  -MAX_FEED_OVERRIDE .. MAX_FEED_OVERRIDE  (As defined in the [DISPLAY] section of the ini file)  
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