LinuxCNC on RPI4b 8GB with P-LCNC Adapter and parallel BOB

 Hello,
after a long way und thousands of tries i got my pi running a RT Raspian what works also with the model B pi and 8GB of RAM.I also got the linuxCNC Version 2.9 (current from git) compiled and running. I have 4 axis set up (xyz and a) and they all are running when i push the /- button for each axis. But when i start the standard cnc program (linuxCNC logo) nothing happens.
I do not get an error nothing moves on the steppers and also in the visual screen the tool is not moving at all. Also when i go to the command line for gcode nothing moves at all.
I have no end/reference switches connected right now, its only a setup with the hardware and the steppers wired together on a table.

Can anybody give me a hind where i have to search? i could not find a log file or something like that. 

Georg
 

It sounds like you need to home the axes. Click the Home All button and that should get you going.

Hello,
the homing i did also. As i wrote even sending gcode to move the axis is not working.

sending a simple gcode to move the axis is not working (MDI tab). For this a spindle should not be needed

i switched now to the latest 2.8 Version, same behavior except that i get now a message that i have to make a reference run (deutsch Referenz Fahrt)

i tried to suppress this with the ini setting in TRAJ
NO_FORCE_HOMING = 1
but this is ignored somehow

Georg

so finally i got it to work, there was a problem with my file, the NO_FORCE_HOMNG=1 did the job

I'm also having a problem disabling homing using the NO_FORCE_HOMING=1 setting in my ini file.

May I ask how you got that to work ?

Thanks !

Jay

Thanks for your reply Andy.

I'm using the Visual Studio Code to edit my ini and hal files. (I'm aware of the 'invisible' characters in files with formatting features  

I did add the NO_FORCE_HOMING=1 under the [TRAJ] section. At first glance the description of that variable seems to say it will allow you to jog, run g-code, and MDI without first Homing. I'm not sure what its function is but it didn't have the affect I was expecting.

After additional research I finally found a post that instructed you to set both the 'HOME_SEARCH_VELOCITY' and the 'HOME_LATCH_VELOCITY' variables in the ini file to 0 for each axis. This appeared to do the trick though I seem to be getting inconsistent behaviors on some things. ( BTW, I initially had set their values to 0.0000 but this didn't work. Changed them to just 0 and it did work ...) Also, I believe you still have to hit the 'HOME ALL' button for the setting to take effect.