Strange repeating S_XYZ:0 code popping up in terminal (cnc.js)

Hi this has been driving me crazy all evening.

Using cnc.js with marlin something is generating repeating lines of:
S_XYZ:0 about once per second.

which interferes with any manual commands I try to enter.

If the machine skips steps the number sometimes changes to S_XYZ:5

If I open in Octoprint I see a repeating M105 command but nothing about S_XYZ:0

running V1Pi on a RP, SKR 1.3 board with TCM 2209. Same problem with a stock bios.

Any help would be appreciated.

Turned out to be a firmware issue… recompiled and it went away.

1 Like

Glad to here it .nothing worse than a random mystery