Linuxcnc on Raspberry

SINGH wrote: please any one help me ..?


i am very tired to findout how to install linuxcnc on raspberry pi 3b+.. i was found so many link and step but all these are not work ,so please any one of them tell me how to install step by step linuxcnc on raspberry pi..


thanks you
best regards
Shailesh singh.

www.google.com/search?source=hp&ei=4ediW...0i10k1.0.bL-lz2nmYNQ

www.raspberrypi.org/forums/viewtopic.php?t=33809&start=950

Those do work, i did install using those guides.
Now, do you want me to come to India to install it for you ???
P.S.
I was contacted by him twice yesterday via e-mail, and i bet many others were too.

Those links are both for Machinekit installations

You _can_ build LinuxCNC from source on a RPI running Raspian, really its no different than any other machine (well except rather slow to build)

You also have to install a real time kernel which is more trouble

LinuxCNC runs reasonably well on a RPI but the OpenGL backplot is painfully slow due to the software OpenGL driver so the backplot would likely need to be disabled in a real system. The hardware accelerated OpenGL driver makes the backplot acceptable but breaks realtime unfortunately.

Edit: it is possible to run a 1 KHz servo thread _and_ have hardware OpneGL acceleration but requires somewhat weird isolcpu settings...

Dear Tommy


Thank you so much for helping and also for your nice comments....
if you wants to come in INDIA . most welcome there is lots of thing you will enjoy.

thank you so much for help .Grand welcome in india .

www.machinekit.io/docs/getting-started/installing-packages/

Damn don't ever use the quick reply here
then think 'where's the attachments?
then goto editor to find your entire post has disappeared.

Hello
I have 53.7us latency using RPi3B with
latency-histogram --base 80000 --servo 1000000
then adding 4 glxgears
then walking away until the next morning.
At 80us period, less 53.7uS max base latency,
I have 26.3uS to do all the step timing.

I use TB6600 ( with the 'upgrade Toshiba 190 chip )
and the step timings I use are
steplen 2000 stepspace 3000 dir-setup 5000 dir-hold 5000

I use double step and use reset-time of 5000

I use my own hal_pi_gpio which allows reset pins

I use a Sable 2015 machine and it has 200step/rev motors and 1.5mm pitch leadscrews
That makes for 0.0075mm step size at full step.

An 80uS base period makes for 12500 steps per second
at .0075mm/step, thats 93.75mm/second and 5.625meters/minute

Its TOO fast for my hardware
I am very happy.

tomp

Hello,
I just got an email about a new possibilty with RPi OPi BPi etc.

A control board originally for reprap machines,
has a linuxcnc driver module.

The pcb necomes a hardware stepgen
The pcb has an LPC1768/9 chip.
The communication is SPI so very little wiring between Pi and LPC
( literally, the wires should be short in length and few in count )

here's the docs
remora-docs.readthedocs.io/en/latest/

and here's the src
github.com/scottalford75/Remora

A posible board for this is
github.com/makerbase-mks/MKS-SGEN_L-V2
There's some argument about opensource-correctness for that pcb.
I have not found the bottom of the argumants yet.

I did find these makerbase people have quite a few interesting repo's
( interesting to cnc people )

The original smoothieboard version 2 and version 1 are seen at
smoothieware.org/

The idea seems to be
like the PICnc effort,
a cheap hardware stepgen using SPI.

TomP