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I am trying to set a scara robot with a remora card, conected by ethernet, i can made to can work with the 4 motors that i need but when i try to put the scarakins. the joints work quite well,but when i home it i cannot move the axis on x and z. and i dont have any idea why this is happening.
 

yeah that should be the only option he needs in the INI file, the one in [TRAJ] LINEAR UNITS

the ai shit up your ini file. you need to fix these sections. I dont know what angular inch U axis is or a linear spindle.

Does it include the speed controller or just the spindle?

I succeeded LC10E driver homing with incremental encoder + origin, limit switch with my own homing codes.

I added HOME_FINAL_VELOCITY to the AXIS_X / JOINT_0 section(s). I set it to match the value for the HOME_SEARCH_VEL and HOME_LATCH_VEL. I also increased the HOME_OFFSET to -.500000 to make sure there was some visible movement. Nothing changed - it locked up trying to move the axis.

Here is that section of the INI file - in case any of the other entries look odd.

#*** AXIS_X *******************************
[AXIS_X]
MAX_VELOCITY = 1.0
MAX_ACCELERATION = 30.0
MIN_LIMIT = -0.01
MAX_LIMIT = 8.0

[JOINT_0]
TYPE = LINEAR
HOME = 0.0
MIN_LIMIT = -0.01
MAX_LIMIT = 8.0
MAX_VELOCITY = 1.0
MAX_ACCELERATION = 30.0
STEPGEN_MAXACCEL = 37.5
SCALE = 8000.0
FERROR = 0.05
MIN_FERROR = 0.01
HOME_OFFSET = -.500000
HOME_SEARCH_VEL = -0.050000
HOME_LATCH_VEL = -0.050000
HOME_FINAL_VELOCITY = -0.050000
HOME_IGNORE_LIMITS = YES
#******************************************

Should be done in CAM, not in LinuxCNC.
-
Seems strange to do that on every cut, although i had a Hypertherm that would need a bit of a pause only on short cuts, but 3 sec. max. so i added that to Inkscape.

It is almost certainly pssible, but probably not particularly easy to set up.

Why did you decide to switch from Mach 3 to LinuxCNC?

Set the HOME_FINAL_VELOCITY to something smaller.
If they are not in the ini file, add them for each joint.

I'm not sure if you were asking me to upload a video to YouTube showing what is happening - but that's what I did. The video link is here:

youtube.com/shorts/D5WTf5WWpfo

It's very hard to 'see' or hear - but as part of the homing function, the axis slowly approaches the limit switch, then moves away, then back and finally 'jumps' away from the switch.

I tried changing the MAX_ACCELERATION setting in the .INI - in both the AXIS_X and JOINT_0 sections. I halved them but it made no difference. I also attempted to move the sliders at the bottom of the LinuxCNC screen (below the jog section) way down one at a time - but that made now changes.

If I try to run even a simple shape (gcode for a small rectangle) it just 'locks up' like you see in the video when I attempt to press the 'SHIFT-(any arrow).

I'm just buffalo'd - I cannot figure it out.

Arden

Hi All,

I am in the process of converting our workshop homebuilt plasma table from MACH3 to LinuxCNC.
So far all the basic things work except for the plasma torch timing. The particular torch & inverter we have
needs a minimum of 15 second delay from the end of one cut to the start of the next. In MACH3 we have a
M3 macro that takes care of that. Is there a feature in QtPlasmaC / plasmac that can do something similar.?
I can do it using the retry logic - but that usually wastes a lot of time between cuts.

Scott.

The expansion board is "plan to sell it" but the prototypes is in making, so its need more time.

Well, you were right. I had to use the modified parameters in the DH method.

What version of linuxcnc are you using?
Can you post your config files?