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  • PCW
  • PCW's Avatar
12 Sep 2025 00:22

PnCconf Mesa 7i96s PWM speed control OUTPUT_SCALE

Category: Driver Boards

Its because pncconf assumes that the PWM full scale is always 10V so if you specify 5V
Is sets the scaling so that you would get 5V (1/2 of full scale scale) at 18000 RPM.

Just leave the "analog Max Voltage" at its default 10V
  • rhscdn
  • rhscdn
12 Sep 2025 00:03 - 12 Sep 2025 00:05

PnCconf Mesa 7i96s PWM speed control OUTPUT_SCALE

Category: Driver Boards

I'm setting up my machine and 7i96s using PnCconf and have had some issues with the spindle speed control. My VFD expects an analog 0-5v signal for speed control, i.e. 0v stopped, 5v 18000 RPM. It is open-loop, no spindle encoders. The motor has 2 poles and the drive frequency at 18000 RPM is 300 Hz. When I generate my .ini and .hal files with PnCconf I get the following in my .ini file.
[SPINDLE_0]
P = 0.0
I = 0.0
D = 0.0
FF0 = 1.0
FF1 = 0.0
FF2 = 0.0
BIAS = 0.0
DEADBAND = 0.0
MAX_OUTPUT = 18000.0
OUTPUT_SCALE = 36000
OUTPUT_MIN_LIMIT = 0
OUTPUT_MAX_LIMIT = 18000

With these settings, when I specify a speed of 18000 RPM (M3 S18000), I'm seeing less than 200 Hz on the VFD display and the spindle seems slower than I expect. Looking through the forums, I see most examples have OUTPUT_SCALE=MAX_OUTPUT. Sure enough, when I change the .ini file and set OUTPUT_SCALE = 18000, and command the spindle with M3 S18000 I get 300 Hz on the VFD display and a higher speed at the spindle. Can anyone explain what is going on here? Have I done something foolish? Any ideas on why OUTPUT_SCALE is configured as 36000 in PnCconf?
  • ccc774
  • ccc774
11 Sep 2025 23:29
Replied by ccc774 on topic Can the OPI5 be Configured to Run LCNC?

Can the OPI5 be Configured to Run LCNC?

Category: Computers and Hardware

Hello everyone,
I installed linuxcnc 2.10 on orange pi5 - with armbian + rt-kernel 6.1.75. The system was made a year ago, and I installed linuxcnc 2.10 now with old versions of dependencies, to keep the 3D acceleration functional.
The problem is that at startup I get the error:
python3: ../src/mesa/state_tracker/st_texture.c:73: st_texture_create: Assertion `height0 > 0' failed.
/usr/bin/linuxcnc: line 1005: 24283 Aborted $EMCDISPLAY -ini "$INIFILE" $EMCDISPLAYARGS "${EXTRA_ARGS[@]}"
Does anyone have an idea if it's a bug in linuxcnc, or the error appears as a result of a conflict?
  • cmorley
  • cmorley
11 Sep 2025 23:08

Having issues calling ACTION.CALL_MDI() from python handler

Category: O Codes (subroutines) and NGCGUI

linuxcnc.org/docs/stable/html/gui/gladevcp-libraries.html

I don;t see anything you have done wrong.
The status library seems not to be able to poll.
Is linuxcnc running when you ran the glade panel?

This might be useful too:
linuxcnc.org/docs/stable/html/gui/gstat.html
  • Gusgus
  • Gusgus
11 Sep 2025 21:32

Remora - Rpi Software Stepping Using External Microcontroller via SPI

Category: Computers and Hardware

Hi!
So the cnc is now moving and it was the SPI cable shielding!!! Thank you Scotta and tommylight!!!

But now we have another, issue, we are using 2 stepper motors for the Y-axis each of the stepper motors is connected to one stepper driver and we have the config setup in a way so that joint 1 pulses both, but that doesn't seem to be happening, only on Y motor moves, and the x axis moves as well, the z axis actually just doesn't move at all.
 
  • scotta
  • scotta's Avatar
11 Sep 2025 20:28

Remora - Rpi Software Stepping Using External Microcontroller via SPI

Category: Computers and Hardware

Is that the config file you have loaded? There are no TMC5160 driver configuration in your config. For each stepper you need to load a stepgen, as you have done, as well as configure the TMC driver. I'll share a config over the weekend.
  • Will_cnc
  • Will_cnc
11 Sep 2025 19:48

Step By Step Help Needed . EL8 Leadshine to PI 5

Category: EtherCAT

Hi Shemj,Thank you so much for your help with getting the EtherCAT drives set up! Following your guide, I’ve successfully managed to connect all three drives, and they’re now running with the Probe Basic interface. The only step left is calibrating them to get the correct mm/rev on each axis.I’d really appreciate some suggestions on how to connect the spindle drive:
  • Current setup:
    • The machine’s three axes are using EtherCAT, connected through a daisy chain of Ethernet cables.
    • The spindle came with a 1.2 kW generic Chinese servo motor and drive, which has a 15-pin RS-232 serial connector.
  • Questions/options I’m exploring:
    1. Using Beckhoff hardware:
      • I have a Beckhoff EK1100. Could this be used with the appropriate module to control the spindle servo drive?
    2. Using a Mesa board:
      • Would connecting a Mesa board to the Pi via a USB-to-Ethernet adapter work, or would that introduce unnecessary complications?
    3. Alternative hardware setup:
      • Replace the Pi 5 with something like an Odroid H4 (dual Ethernet ports). That way one port could handle the Mesa board and the other the EtherCAT drives.
    4. Replacing the spindle drive:
      • The supplied spindle drive is an XCSD-20A from cncservocontrol.com. Are there any EtherCAT-compatible alternatives that would work with my motor?
  • Motor details:
    • Model: 80ST-M04030LBP
    • Power: 1.2 kW
    • Current: 5.2 A
    • Voltage: 220 V
    • Torque: 4.0 N·m
    • Speed: 3000 rpm
    • Encoder: 2500 PPR
If anyone has advice or suggestions on the best approach to integrate the spindle motor/drive, I’d be very grateful! 

   
  • unknown
  • unknown
11 Sep 2025 19:42
Replied by unknown on topic The forum is really laggy recently.

The forum is really laggy recently.

Category: Forum Questions

A ROOT server has nothing to do with routing.
www.iana.org/domains/root/servers

When was the last time you put the address of a Domain Name Server into a web browser ?
DNS works via port 53 not port 80, a web browser defaults to port 80 to connect to a server unless you tell it otherwise.
Would a DNS machine handle a http or https request ?

This is my point. Think about it very carefully. What is running on the machine that the OP gave a FQDN for, a webserver or DNS.
As an experiment, just use the IP the OP gave for your only DNS entry, clear the cache on your machine, so there are no cached entries locally and try and ping an internet address, say google.com, and see what happens.
I'd even bet there is no service running on port 53 at the address he gave.
  • unknown
  • unknown
11 Sep 2025 19:14
Replied by unknown on topic The forum is really laggy recently.

The forum is really laggy recently.

Category: Forum Questions

I think someone may have the concept of DNS and routers mixed up.
I have forum.linuxcnc.org in my /etc/hosts file, so no need to use an external DNS, and I'm still getting timeouts. Hakan has even proven it's the connection to the machine running the forum software that is the issue.
And more over the OP himself won't answer any questions.
And finally, when was the last time a DNS was connected to via a FQDN ?
When you setup a static IP you assign your DNS by IP whether on your local network or on the internet, how does one connect to a DNS via a FQDN ?
Setting up a DHCP server, the DNS entry is an IP address not a FQDN.
Can you see, anyways what is the chance of a hosting service allowing you to run a Domain Name Server, can you imagine the traffic ? Bun
Anyways nowhere did the OP say "hey guys add this DNS entry to your network setup". So how is this a DNS server ?
Just think about it.
  • MaHa
  • MaHa
11 Sep 2025 18:38

Having issues with oword test scripts in version 2.9.4

Category: O Codes (subroutines) and NGCGUI

Just in case it's not solved yet:
Use capital letters for ini file entrys...
[LASER]
LASER-OFFSET-X = -3.1702
LASER-OFFSET-Y = 0.0568

[PARK]
PARK-OFFSET = 0.125

[PROBE]
Z-OFFSET = 0.543
  • tommylight
  • tommylight's Avatar
11 Sep 2025 18:22
Replied by tommylight on topic The forum is really laggy recently.

The forum is really laggy recently.

Category: Forum Questions

WTF????
This is NOT a security issue, he is not hosting our forum, he has no access to anything except his own account on our servers, he just added another route to access our server to CloudFlare that is used by millions of users to protect from DDOS attacks and supply them with DNS services.
He just allowed us to use his DNS service.
DNS = Domain Name System = the things that converts www.linuxcnc.org that Internet has no idea what to do with, TO 69.163.143.134 that Internet can understand and route through ROOT servers to get to our server.
Think of it as a highway, our normal route is has to much traffic due to our provider having a single toll booth, LangdonS added another route with more toll booths.
-
Frankly, this is a bit to much for nothing, i am extremely paranoid about privacy and security, if it was something, no matter how small, i would have raised hell here.
Move on, thank LangdonS and move on.
I am using his DNS for two days now, and i am also logged in the normal route, the normal route times out 60% of the time, this works with a bit of lag sometimes, but works consistently.
  • tommylight
  • tommylight's Avatar
11 Sep 2025 17:58
Replied by tommylight on topic Plasmac Post Processors

Plasmac Post Processors

Category: Plasmac

There are no
N75 M3 $0 S1
in the gcode after the first piece, and no M5 at the end of the cut except for the first cut.
Those must be added by the post processor.
  • tymko
  • tymko
11 Sep 2025 17:42

After installing probe screen, G-code does not start

Category: General LinuxCNC Questions

 
 remap=m6 modalgroup=6 prolog=change_prolog....
  • tymko
  • tymko
11 Sep 2025 17:33

After installing probe screen, G-code does not start

Category: General LinuxCNC Questions

maybe I solved the problem, I removed one line of code from ini.file, I don't know if it was a good solution but for now everything works
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