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As I understand it there is one linear and four rotary axes which is not one of the traditional 5axis kinematics (ie 3 linear and 2 rotary).

Ah yes the editor. Truly you have come of age and walked the path of darkness

I would just watch the encoder velocity in halshow

I edited my original post to include changing the display protocol from Wayland to X11. Comments by rodw and cornholio were based on the terrible jitter that Wayland induces as shown above.

Note that Kunena has the worst forum editor I've ever used, and it was quite a job to edit those posts and restore the formatting. I wonder if forum posting would increase with forum software that was more user friendly.

Thank you Rod for your advice.

I'm testing when I have the chance. I can put the 1/32 divider frequency. I'm used to THCAD300 and always put on 1/128.

The sticker value for my THCAD2 is: FSV - 899.4 kHz | 0V - 96.8 kHz

The initial value for the offset was about 700 but I've noticed that when the Power Source is Down (No Power) the arc voltage is 0V. When I turn On the arc voltage goes to 12V.

Checked the encoder velocity pin with the value of 900. Put 900 in the offset. Arc voltage has 0V and got decent results.

Made some tests today. When I make the first pierce the arc voltage, in the first moments turn in -73 and then goes back to normal value.
After that the pierces (should be a higher value than the Cut Volts on material) seems normal to me.

Talked with the supplier of the plasma source and he refers HF equipment and to check the grounding. Reinforced the grounding connections which has a good grounding less than 0.3 Ohm.

this would be in main linuxcnc forum most likely i think for information on key assignment for better results. its not really dealing with the ui beyond controlling functions already preestablished inside linuxcnc that the ui connects too.

Shame on me -- I'm working at university -- non commercial use is free for us. At least it was free last time I checked.

The problem lies at the source. Spare parts can no longer be purchased from the manufacturer. Actually detector (alas slow) is still working. But the machine is at least 20-30 times slower than the new one. Cooling water, electricity and liquid nitrogen consumption are too high on this old equipment.

Hello!
Which pins I have to use in the carousel comp. to make move the stepper motor with one homing sensor? (there will be pulses between home and first tool; and pulses between tools)
I have a stepper motor and a sensor for "homing". (The belt drive DC motor just opens the door of the magazine and the other 2 sensors used for check the door position open/close)
The LinuxCNC will be the 2.9.3 v (and a Mesa 7i96s+7i84 board)

Looks a lot better.

One thing that was strange when running a basic config I got a real time error. hmmmmm

ATM the best image I've come across is Joco's rpi5 image rod has on his googledrive, that has a 6.6.54 kernel. It's my choice of the pre-built images.

I installed mate desktop, with 2 cores isolated, watching youtube latency is about 17-18us on my pi.

I'll second rod's conclusion.  At that RPM steppers can vibrate like mad.

Change the screw pitch and you'll get the rpm out of the vibration range, as well as gaining some resolution and thrust.

The good news is switching to X11 is trivial.

You can check the session type:    wayland

Launch Rasp-config command line tool in a terminal:
Arrow down to "Advanced Options", and enter.
Arrow down to "Wayland                 Switch between X and Wayland backends", and enter.
If not on the line that says "W1 X11     Openbox window manager with X11 backend", arrow to it and enter.
The popup should say "Openbox on X11 is active" and have "Ok" highlighted. Enter.
It will return to the main screen. Use left-righ arrows to select "Finish". Enter.
Popup asks if you would like to reboot now, with "Yes" highlighted. Enter.

After reboot:    x11

Now here's the interesting apples to apples comparison. The only difference between these two pre-jitter-optimization baseline latency runs is Wayland vs X11.

Wayland:
 

X11:
 

 

Based on the given information about the requirements and constraints I cannot advise anything and cannot tell wether it will be successful, clever or foolish.

My search terms would be: (without deeper knowlede)

lookup table
kinematics

Digging through the hal component list and look if I could convert the linear movement to an angle in the hal.
linuxcnc.org/docs/stable/html/hal/components.html

Greetings.

high resolution rotary encoders tend to be more expensive than a linear scale, so for a sine bar like arrangement I was thinking if a linear to angle system would benefit from. High torque, and high accuracy. At the cost of a very limited angular range.
 

Using MDI with python there's a 20ms delay between sending the command and the robot starting the move. There is also a 20ms delay between each MDI command i can send. So if i want to send 10 points to the robot it'll take 200ms to just send the commands.

This is far from ideal for a realtime application. Is there a parameter I can tune to speed up MDI?

Rod has a point about making sure you are using the right Mode. Assuming you are using Mode 1, it’s really odd to me that the power source is sending an arc ok signal when there is not even an attempt at a pilot arc. I know my powermax 65 (xp) will stop the post cool down flow and fire up the pilot arc. But also it won’t provide an arc ok signal until the arc is actually … OK.

It’s odd that it requires two torch on pulses to fire up after the cool down phase.

Are you sure it’s not in some other mode, like gouging or cutting expanded metal?

Also, I feel like this is vaguely familiar from an issue someone else had here. You might do some searching (if you haven’t already) of the forum, even though the search mechanism can be …limited…

Good morning friend, I know some shortcut keys for LinuxCNC, one day I will see if there is the possibility of creating a custom shortcut key and then I will post it here.



Keystroke Action Mode

F1

Toggle Emergency Stop

Any

F2

Power On/Off Machine

Any

`, 1..9, 0

Set Feed Override from 0% to 100%

Varies

X, `

Enable First Axis

Manual

S, 1

Enable Second Axis

Manual

Z, 2

Enable Third Axis

Manual

A, 3

Enable Fourth Axis

Manual

L

Select Jog Increment

Manual

C

Continuous Jog

Manual

Control-Home

Execute Home Sequence

Manual

End

Touch Off: Set G5x Offset for Active Axis

Manual

Left Right

Jog First Axis

Manual

Up Down

Jog Second axis

Manual

Pg Up, Pg Dn

Jog third axis

Manual

[,]

Jog fourth axis

Manual

O

Open file

Manual

Control-R

Reload file

Manual

R

Play file

Manual

P

Pause execution

Auto

S

Resume execution

Auto

ESC

Stop execution

Auto

Control-K

Clear background graph

Auto/Manual

V

Switch between preset views

Auto/Manual

Shift-Left, Right

Fast X axis

Manual

Shift up, down

Fast Y axis

Manual

Shift-PgUp, PgDn

Fast Z axis

Manual

@

Toggle real/commanded

Any

#

Toggle relative/machine

Any