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  • NWE
16 Jul 2026 04:13
Replied by NWE on topic Problems with Lichuan Ethercat servo drive
Thanks. A couple test runs of this look promising. I will try this out on an actual servo as soon as I find time.
I extracted the zip file then sha256summed it:
sha256sum servo_tuning 
9f2f5cb11561d13a6a3a4a62ac4788c9b2ea742844b31f8aeb7327cae0cb9cb9
next I marked it executable:
chmod +x servo_tuning
Then I started it:
./servo_tuning
  • cmorley
16 Jul 2026 01:54
Replied by cmorley on topic Problem with PROBE tab after running a program
Glad we finally got it :)
  • PCW
15 Jul 2026 22:50
Replied by PCW on topic Is possible to use RS485 to read a CMOS laser sensor?
Yes, you would use 7i96s_pktv3.bin firmware.
 
  • rodw
15 Jul 2026 22:30
Replied by rodw on topic I hate the 7i97T
Sometimes though the subnet mask does become important. I was allocated a 64 IP address range from my ISP way back when it was a dedicated dial up connection. Then the mask was important /26 or 255.255.255.192. But when setting up your own networks, just using 255 IP address are plenty and if you need seperate subnets, use the 192.168,  172.16 and 10 ranges or you can use 192.168.1.x, 192.168.2.x etc. You might need 2 seperate networks if you have a router with 2 WAN ports so you can have a failover connection or DMZ.
  • tommylight
15 Jul 2026 18:09
Replied by tommylight on topic I hate the 7i97T
The default subnet mask for 10.n.n.n IP range is 8 or 255.0.0.0, and it will work with any subnet mask you set, be it 16 or 255.255.0.0 , or 24 or 255.255.255.0
I am sure that was not the issue.
Subnet is used to limit the the access to a certain IP range even when the same starting IP's are used, the thing nobody ever mentions here is:
Non routable IP ranges are :
10.0.0.0 to 10.255.255.255 (10.0.0.0/8) so roughly 16 million IP addresses
172.16.0.0 to 172.31.255.255 (172.16.0.0/12) so roughly 1 million IP addresses
192.168.0.0 to 192.168.255.255 (192.168.0.0/16) so roughly 65,000 addresses
Notice the default subnets, they can go up to 32 or 255.255.255.255 but that is useless as that will limit access to 0 (zero) IP's
You can set the subnet to 28 or 255.255.255.240 for the 10.n.n.n range, and still Mesa WILL work, as that will limit the IP block access to only 16 IP's, and since two of those are always reserved, you have 10.10.10.1 up to 10.10.10.14 that will work perfectly fine.
Etc etc, way to many variations there, but in general subnet is not very important ... until nothing works due to an error in it.
  • pgf
15 Jul 2026 17:54
running the spindle as a lathe spindle was created by pgf
I have a couple of small parts that could/should really be done on a lathe, but my efforts at getting them right on my (manual) wood lathe have been... disappointing.

I heard recently of a technique I hadn't considered, using a 3-axis CNC machine:  Mount the stock to the collet of my  router spindle.  Mount a fixed cutter to the bed, oriented parallel to the X axis.  Adjust Y so that the cutter falls on the centerline of the spindle's (and stock's) spinning axis.  X will now control depth of cut, and Z will move the stock vertically lengthwise past the cutter.

First:  Does this technique have a name?  That might help my searching.

Second:  has anyone done this?  is it a worthwhile technique?

The parts in question are reproductions of antique hand crank handles.  Since they conveniently have a 1/4" bore down the middle, securing them to my 1/4" router collet will be relatively simple.  My bed is threaded-hole style, so pretty flexible in terms of mounting the cutting tool.  Just looking for ideas, cries of dismay, incredulity, encouragement -- whatever you all have on offer today.

paul
  • vermilion
15 Jul 2026 17:50
Replied by vermilion on topic Is possible to use RS485 to read a CMOS laser sensor?
The manual specifies 8-bit asynchronous MODBUS via 2-pin RS-485 (A+ and B-); so, do I need to flash the pktUART driver? That is done by updating the firmware and using terminal commands, right? Gemini AI suggested something along those lines.
  • RoberCNC
15 Jul 2026 17:47
Replied by RoberCNC on topic Problem with PROBE tab after running a program
Hi Chris.

I´ve been using it for a while and this last archive works fine, everything seems to works properly, pretty good.

Thanks a lot.
  • vermilion
15 Jul 2026 17:44
Replied by vermilion on topic Is possible to use RS485 to read a CMOS laser sensor?
Okay, the first option is using the USB adapter, but having a long USB cable is a bit inconvenient for my setup; the electronics are at the back of the machine and the PC is in front, in an external rack. Still, if there's no other way, I don't mind—though I wonder if the reaction time is slower via USB compared to RS485? This matters because it involves the sensor I want to use to measure the plasma's Z-axis. Then again, it might not really matter, since the head doesn't move while measuring the Z-distance; it just measures and calculates, then moves directly to the initial cutting height.
  • pgf
15 Jul 2026 17:37
Replied by pgf on topic I hate the 7i97T
This may be obvious to everyone, but just in case: there are two different ways of specifying subnet masks. You can either spell out the mask itself, in either hex or decimal( ff.ff.ff.00 or 255.255.255.0), or you can simply specify the number of 1 bits in the mask: 24. If the mask itself is given, it should always be written as 4 dot-separated octets. If the count is given, it's usually specified with a / character, after the network itself, as in 10.10.10.0/24. (Aside: note that using the count-of-bits method, you can never specify a subnet mask that isn't a contiguous set of 1 bits. Such "non-contiguous" masks are technically legal, but are really hard to manage, so, don't do that. :-)
  • PCW
15 Jul 2026 15:48
Replied by PCW on topic Is possible to use RS485 to read a CMOS laser sensor?
What protocol does the sensor use?

Modbus is supported by Mesa FPGA cards with the hm2-modbus/PktUART
drivers.

If your sensor does not use Modbus, fora Mesa card, it would require
a driver part like hm2-modbus communicating with the PktUART driver


 
  • tuxcnc
15 Jul 2026 12:55
Replied by tuxcnc on topic Getting Trixie to play nice

I am unable to stop the screen from going blank and
In Trixie you have to disable power manager and screensaver in startup options (Main menu -> settings -> session and startup) and add the line bellow to ~/.bashrc
Code:
xset dpms 0 0 0 s off
 
  • rodw
15 Jul 2026 11:17
Replied by rodw on topic Getting Trixie to play nice
You should be able to disable the screen saver under power settings and/or Display but it has got more difficult
In my ISO, I had to go to great lengths to force this modifying xfce config files but its not in a format to share as a script as its in the live build environment
 
  • rodw
15 Jul 2026 11:11
Replied by rodw on topic Trixy Install problems

Thanks for all your replies.  However, I found the only way I could do the install was by downloading Debian, doing apt update, apt upgrade, and then installing LinuxCNC via Synaptic.  Worked a treat.


 
That might be a fairly old version of linuxCNC.What is the version  number printed on the splash screen? Or in the console if stating from the terminal?  current is 2.9.10
  • rodw
15 Jul 2026 11:03
Replied by rodw on topic qtDragon: Auto Return to Manual Mode After an MDI Command so MPG works
For interest, I had a pendant I had hardwired in that had a Deadman switch that had to be held in before you could jog. I was using Gmocappy at the time and I got sick of changing modes which also changed the tab. I was able to wire this Deadman switch to halui.mode.teleop and life was happy as I never had to bother swapping modes again.
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