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You do not absolutely need to have switches on a gantry
but if not, you need to use an "immediate" homing setup:


linuxcnc.org/docs/html/config/ini-homing.html#_immediate_homing


 

Hi Chris,
yes, it is now. I'm going to start a few experiments now. Thank you very much for your tip!

Peter

So, I will need to install physical limit switches to the table for this homing setup?
Is there a tutorial and were for wiring limit switches correctly to the control board ST-V3. As I do not have any switches install at this time. It never needed them when I had the table setup for Plasma cutting. Now I have changed to Router it seems that this is an issue.

You need to keep name  for axis z as joint2. I noticed in your ini file you using the name joint 1 that should 2.
For the exposed pin from the vista pedant keep the names of the axis as number example vc-p1as.axis.0,
I attached revised hal file check for typos
revise your own ini file for joint names (numbers)

edit:
have read through this thread:
forum.linuxcnc.org/38-general-linuxcnc-q...ling-to-share#261003

 

Hi all;

I've been converting from MACH3 to LCNC. In MACH3 I had configured an XY positioning laser using a macro that would allow me to jog to the program zero for a given project, then once positioned at the appropriate point I would click on a button that would calculate the X/Y offsets, move the spindle to the true program zero then set the G54 X/Y DROs to zero. This was very fast and accurate way to perform this task and along with a tool probe to zero the Z axis, program home is quickly established.

I would like to do something similar adding a button in the pyVCP to turn on the laser and once positioned a second button to compute the offsets, move the spindle to program zero, set the X/Y DROs to zero and turn off the laser.

Searching the forum, I've not found any info to work from. Has anyone configured a positioning laser on their system?  I'm a little rusty on my Python, but I can get back into it quickly or would classic ladder be a better option?  Any help would be greatly appreciated.

Kind regards

Thanks Peter.,

There was no change after adding chokes at both ends of the RS-485 wire. Checking the wire I discovered that it was not shielded. Ordered a few feet of 18 gauge shielded wire for CNC VFD use. First attempt I received the wrong wire. Finally got the right wire today.

After installing ferrules on both ends with minimum wire exposed and installing it, I double shielded it by adding a choke at the VFD end of the wire as close to the terminal block as I could and grounded the shield at the dongle to the PC.

Restart was successful. No issues running the spindle after the upgrade.

Thank you for your guidance.

Kind regards.

Have you seen this?
linuxcnc.org/docs/devel/html/gui/qtvcp.html

I have no clue why this didn't work yesterday as it is working for me today... maybe a typo in the ini file who knows.

In 2.9.0~pre that ships with  Debian 12 only the reverse caps work so that's why it didn't work for me as I only tried the forward caps.

JT