ini. changes while EMC2 running?

cwebs wrote:

Can I make changes to my ini file while the program is running? I will be making changes to MAX_ACCELERATION rate. Or will I have to stop, restart, home and try the change? Thanks Carl

Changes you make to the INI file will have no effect while the program is running.

However, you can change pins and parameters if you want. (but the changes will not be mirrored in the iNI file)

The way to do it is using the halcmd setp (set parameter/pin) command. You can type this command either into a terminal window (with EMC2 running) or into the box at the bottom of the machine->show hal config window in Axis or tkEMC. (You might have to re-size the window to even see the box)

I prefer to use a terminal, because then you get tab-completion and history.

I can't actually find any pins/paramters for axis accelleration though, which is annoying.

If you are tuning your axes with a stepper system then one way is to create a dummy stepgen config, and experiment in the "test axis" mode, then make a note of the values for your INI file.

It seems that the value goes straight from the INI file to emcAxisSetMaxAcceleration in
git.linuxcnc.org/gitweb?p=emc2.git;a=blo...c/emc/ini/iniaxis.cc
Which is in
git.linuxcnc.org/gitweb?p=emc2.git;a=blo...emc/task/taskintf.cc
and uses
emcmotCommand.command = EMCMOT_SET_JOINT_ACC_LIMIT
Which is ony used in command.c.
command.c has some very interesting comments related to this question at the beginning.
git.linuxcnc.org/gitweb?p=emc2.git;a=blo...emc/motion/command.c