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  • langdons
  • langdons's Avatar
14 Oct 2025 21:52
Replied by langdons on topic Lathe : 2nd turret over limit switch

Lathe : 2nd turret over limit switch

Category: Advanced Configuration

Limit switches probably can't and shouldn't be disabled.

Do you need a limit switch there?

So long as the machine is homed, it won't exceed the soft limits unless the computer goes completely rogue.

Hard limits are preferable, but not always 100% necessary.
  • langdons
  • langdons's Avatar
14 Oct 2025 21:49 - 14 Oct 2025 22:31
Replied by langdons on topic WCS Problem with Linuxcnc/qtdragon

WCS Problem with Linuxcnc/qtdragon

Category: General LinuxCNC Questions

Why did you replace the original breakout board?

LinuxCNC can work with a lot of different hardware.

The bottom of the window seems to be cut off (the monitor is slightly too small perhaps), is it possible that there is some important information that we (most importantly, you) can't see?
  • vre
  • vre
14 Oct 2025 21:48
Injection molding was created by vre

Injection molding

Category: CNC Machines

Can linuxcnc used as controller for hydraulic injection molding machine ?
For example to read thermocouples and do pid temperature control
actuate hydraulic solenoids read linear scales encoders and pressure sensors.
Does anyone have done retrofit of injection molding machine with linuxcnc ?
A machine that is not gcode controlled and not have linear axes..
  • langdons
  • langdons's Avatar
14 Oct 2025 21:43

M1xx: Controlling Relays (solenoids) from within axis MDI

Category: Advanced Configuration

The 1N4148 diode goes across the relay coil pins, not in series with the coil.

It should block voltage when the relay is on, but allow current to flow from GND to VCC when the relay is switched off.
  • langdons
  • langdons's Avatar
14 Oct 2025 21:37 - 14 Oct 2025 21:39
Replied by langdons on topic control spindle motor using modbus

control spindle motor using modbus

Category: General LinuxCNC Questions

If your setup is parallel port, please keep in mind you almost certainly have enough output pins to control the spindle via the existing parallel port interface.

12 output pins is quite a lot.
(Enough for 6 step/dir axes!)

Your post is slightly reminiscent of this one:

linuxcnc.langdonstaab.ca/10-advanced-con...from-within-axis-mdi
  • unknown
  • unknown
14 Oct 2025 21:12

fixing "raspi firmware" errors on the official amd64 ISO

Category: Installing LinuxCNC

Hostmot2 firmware is there. Running Axis in a VM using the sample code, apart from the latency error, runs ok.

Now this is something I found rater curious.
Both were builds had the target as Debian Bookworm.

Building on a system running Debian Trixie raspi-firmware IS NOT installed. (built twice on 2 different machines)
Building on a system running Debian Bookworm raspi-firmware IS installed. (single build only attempted)

I will try a build on my Bookworm machine with the live-build package from Trixie and see what the results are.

The firmware "blacklist" is created here
salsa.debian.org/live-team/live-build/-/...h?ref_type=heads#L92

So I will need to see what the difference is between the Bookworm live-bulid package and Trixie.
Simple enough Bookworm doesn't have the firmware blacklist code.
  • PCW
  • PCW's Avatar
14 Oct 2025 21:06

M19 for Indexing a Spindle using Stepper Motors

Category: General LinuxCNC Questions

www.linuxcnc.org/docs/html/gcode/m-code.html#mcode:m19

Says:

Spindle orientation requires a quadrature encoder with an index to sense the spindle shaft position and direction of rotation.

The need for an encoder can be worked around by using a StepGen with the index feature but that would still require
a once per turn signal for initial alignment.
  • Doc_emmet
  • Doc_emmet
14 Oct 2025 20:53 - 14 Oct 2025 20:56
6th axis for ATC was created by Doc_emmet

6th axis for ATC

Category: General LinuxCNC Questions

Hello, I use QtDragon with 5 axes (X, Y, Z, B, C) and have expanded and flashed my Mesa 7i76EU with a 7I85s. The additional 4 axes are also displayed with sudo mesaflash --device 7i76eu --addr 192.168.1.121 --readhmid. As far as I know, QtDragon can only handle 5 axes. I need an additional axis for the ATC that doesn't need to be displayed in QtDragon. Can I control it via G-code, e.g., G0 W100, or if G-code isn't possible, via HAL commands?

I read that you can customize the xyzbc-trt-kins file, but I can't find it?
  • richcolvin
  • richcolvin's Avatar
14 Oct 2025 20:13

M19 for Indexing a Spindle using Stepper Motors

Category: General LinuxCNC Questions

I am trying to use the M19 command:

m19 r90 q10 p1 $0

The m3 & m4 commands work as expected, but m19 does not.  Any guidance would be greatly appreciated.

My HAL and INI files are attached (Spindle0.inc renamed to be Spindle.inc.ini so that it could be attached).
  • JT
  • JT's Avatar
14 Oct 2025 19:39 - 14 Oct 2025 19:41
Replied by JT on topic FlexGui custom buttons

FlexGui custom buttons

Category: Other User Interfaces

If you use partial and pass the parent then you have access to everything.

There is a #flex-dev channel on the Libera.Chat which I monitor usually.

JT
  • DerKlotz
  • DerKlotz
14 Oct 2025 19:13
Replied by DerKlotz on topic Glade Hal Meter Spindle Speed -> postgui

Glade Hal Meter Spindle Speed -> postgui

Category: GladeVCP

Unfortunately, I'm still stuck, even with the additional link.
My thoughts:
Where can I get the spindle speed (float)? Would that be the value “spindle.0.speed-out,” for example, which can be seen in the attachment?
How do I transfer the float value to gladevcp.Spindel?

My favorite code doesn't work. 
net Spindelrpm =>  gladevcp.Spindel <= spindle.0.speed-out
Error "custom_postgui.hal:9: Pin 'spindle.0.speed-out' was already linked to signal 'spindle.0.speed-out'"
 
  • jmp97
  • jmp97
14 Oct 2025 18:50
Replied by jmp97 on topic LinuxCNC installation + 7I96S

LinuxCNC installation + 7I96S

Category: Installing LinuxCNC

OK, I've managed to get the motor moving. The two +/- buttons now move the motor, although I'd like to have an interface with arrows. (More user-friendly)

I'm using the default LinuxCNC configuration for my 7I96S card. I need to modify the parameters for my CNC machine. How can I do this to ensure that the changes are correct?



Thank you.
  • PCW
  • PCW's Avatar
14 Oct 2025 18:27
Replied by PCW on topic LinuxCNC installation + 7I96S

LinuxCNC installation + 7I96S

Category: Installing LinuxCNC

Can you post the complete hal  file so that cause of the issue can be determined?
  • abs32
  • abs32
14 Oct 2025 18:16 - 01 Nov 2025 10:37
  • tommylight
  • tommylight's Avatar
14 Oct 2025 18:13
Replied by tommylight on topic Secondary PWM Output for LASER

Secondary PWM Output for LASER

Category: Advanced Configuration

Pretty sure mine does not use M68, but M67.
The included dmap2gcode can open an image and output gcode you can test with, it creates a depth map of the image so it also varies the laser PWM as needed.
You can use my config as is, but:
-you have to edit the hal file parallel port pins for your hardware
-maybe also edit the ini file velocities and accelerations for your machine as mine are set very high on acceleration and slow for velocity
-it also has a PyVCP panel that shows the PWM/laser power
-my config is alos limited to roughly 80% of max PWM to prevent pressure servo motor from triggering protection, you do not need that so you can push 100%.
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