Advanced Search

Lenovo ThinkPad R61E, built in RJ45 connector, very old
-This is with only 1Gb of RAM, Linux Mint 19.3 XCFE, kernel 4.16.12-rt5-kona-rt, single core processor at 2GHz.
-Using 4.9.47-rt37-kona-rt kernel the latency is much better, and can run Linuxcnc through ethernet connected to a 7i92 for 2 days without latency issues.
-Overall, a usable laptop for machine control, especially with more memory. No battery so no info if removing the power would cause latency errors.
Added:
Using this laptop for several weeks now, no issues so far, it works nicely and does not cause latency spikes even under load.

Lenovo ThinkPad Yoga 370, Intel Core i7 7600U, 16GB RAM, 512GB NVME
-
-TouchScreen as it is laptop/tablet combo,
-no RJ45 connector,
-tested using a USB-A to GigaBit Ethernet adapter
-LinuxCNC 2.10 on Linux Mint 22 with RT kernel 6.10.12, Mesa 7i92 on a production machine,
-No GRUB changes, no isolcpus nor anything else, no BIOS changes
-complaints about latency whenever sound is used, but does not loose or drop connection,
==disabling hyperthreading and Intel AMT gets rid the warnings, but still rarely it does complain
-Plugging power does cause latency warning, but machine continues to work, and uplugging does not.
-isolcpus=3 and =2,3 did not help
-disabling TPM does NOT help much
==disabling SGX and virtualization DOES help a lot,
-no more warnings even playing videos during running of LinuxCNC and doing other stuff,
-did not test youtube as WiFi does not work with this kernel
-no more issues with servo period 1mil at all, except when plugging power
Video:
www.youtube.com/shorts/__zn74D7OyM

Lenovo ThinkPad X240, built in RJ45 connector:
-LinuxCNC 2.8 on Linux Mint 19.3, Mesa 7i92 on a production machine, very short use but so far no complaints at all
-No GRUB changes, no isolcpus, no changes to BIOS, nor anything else
-Plugging and unplugging power does not cause any issues
-Running on batteries does not cause issues
-Used for a 5 hour run and left two days on, no issues, no warnings, no disconnects.
=
Had two of these, they seem to have bad issues with batteries where if any of the two (internal and external) batteries is empty, the laptop will not turn on at all, needs several hours plugged in to actually turn on.
Do not let the batteries go empty.

Lenovo ThinkPad T470 with touchscreen and built in RJ45 connector:
-In use for over a year running LinuxCNC 2.8 on Linux Mint 19.3 and PlasmaC on a production machine, wired to Mesa 7i92, complains about latency with 1000000 servo period but never fails, never drops the connection and never messes up.
-No GRUB changes, no isolcpus or anything, probably would get rid of the warning if used.
-Plugging and unplugging power does not cause issues
-Using it on batteries does not cause issues
Will add BIOS stuff and videos/pictures later.
Edit:
Video
youtube.com/shorts/ciVcxrlmMIA?feature=share

Do NOT post here about issues with Laptops, post only tested and working ones.
For issues start a new topic, BUT do keep in mind laptops are not advised to use on production machines due to latency issues inherent from power saving options built into them.
All test are done on a production machine, time in use noted for each one below, as are BIOS settings changed and suitability for use in testing or hobby or production environment.

Confirmed able to install now on stable.

Its not the RPM you need but rather the linear mm/s velocity at 10V
If you have your encoder scale set correctly (check first) you can
measure this at the encoder velocity pin (it should read in mm/s
if scaled properly)

Edit, I miss-understood, yes, measuring the RPM if you have a way
to do this without LinuxCNC should work as well
 

forum.linuxcnc.org/18-computer/54368-pci...-work-out-of-the-box
Apparently i have a Sunix card, and it works out of the box, but i have no 7i43 to test with.
When i get to the shop i can try to get some info on what modes it supports and report back.

What do you need help with?

All the PWM channel 4 setup is commented out...

# ---PWM Generator signals/setup---

#setp hm2_7i97.0.pwmgen.04.dither true
#setp hm2_7i97.0.pwmgen.04.output-type 1 #PWM pin0
#setp hm2_7i97.0.pwmgen.04.offset-mode 1 # offset mode so 50% = 0
#setp hm2_7i97.0.pwmgen.04.scale [SPINDLE_0]SCALE

Try t2m6

hvjhghg

PCI to parallel card, same as above in everything except the chip naming is different.
Can be found on the same older HP desktops as the above.
Works out of the box in same modes as the one above.

PCI to parallel card with 2 of RS232 serial port headers.
Can be found on older HP desktops, hard to find as most have been thrown to trash, but do check local repair shops, they might still be on the shelves...
Works out of the box with LinuxCNC 2.7 and above, can do OUT and IN mode, did not test X mode yet.
Comes with the long bracket and another long bracket with two serial ports.

PCI to parallel, very old, bought online.
Works out of the box with LinuxCNC from 2.5 and above, several in use for over 10 years without issues.
Uses the MOSCHIP MCS9865 chip, comes with the short bracket.