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  • meister
  • meister
  • sivaraj
  • sivaraj
09 Apr 2025 02:55

Trouble probing 1Vpp signal from Heidenhain LS403 with oscilloscope

Category: Milling Machines

As for as I know Heidenhain LS403 is a 11uA signal . Not 1Vpp.
Please check the datasheet
  • irwinger
  • irwinger
08 Apr 2025 21:53
Replied by irwinger on topic Spindle control not showing in Axis window...

Spindle control not showing in Axis window...

Category: Basic Configuration

Back to the 'knowledge well'... sigh.

What I CAN do:
I have my motion control working (I can job X, Y and Z in the correct directions - or at least in the directions I want them to move when pushing the +/- buttons).
     - I had to 'reverse' the homing direction of my X and Y axes in the INI file, changing the lines:
       HOME_SEARCH_VEL = -0.050000  ; changed 0.050000 to -0.050000
I have my spindle control working - I can turn the spindle on and off from the Axis UI
I have my home/limit switches working - I can 'home' my X & Y (I don't have Z-axis home/limit switches)
     - the 'home' symbol shows in the DRO section of the Axis UI

What I CANNOT do:
1) I cannot 'touch-off' any of my axes. I homed all axes, jog my router off of the Home position, click the 'Touch Off' button and leave the defaults as presented, click the 'OK' button and immediately get an error stating "Can't issue MDI command when not homed. This of course also translates to my MDI (F5) screen when I attempt to move the router around using the G0 command
     - I am somehow way out of 'scale' with motion - I was planning on using the MDI interface to specify G-Code moves and measure results. Of course I immediately got the "Can't issue MDI..." error so I returned to the 'Manual' tab to ensure I was homed... which I was.
     - At this point, 'eyeballing' alignment with marks on the wasteboard, a 5" move shows as ~1.25" on the DRO in the X dimension. I'm guessing Y will be the same - but Z will be different because it uses a different Acme threaded rod.

I did try to find a solution in the 1347 pages of the manual... but that document is just absolutely overwhelming. In fact - I tried going through it again, one more time before I pushed 'submit' on this post (I DID realize that at least part of my motion scaling issue is my INI configuration). I even read the 'history' this time and realized that LinuxCNC emerged from a NIST project that was based on Windows NT... if ONLY the guys that were first involved would have stayed there (insert joking face emoji here).

If you want me to repost this as a new thread with a new title - I am happy to do it.
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