Wes wrote:
Update — fixed, and it was exactly the corrupted-machine-Z cause Ian flagged.
Root of it: a few cuts back I stopped a cut mid-way and manually reset the
machine, and before that the Z had been jogged up into the top stop (clicking
/ skipped steps). That left the machine Z reading way too high — 176 —
while the bit was nowhere near that height. With a bad machine Z, jogging X
or Y was firing a Release Tension and dropping the bottom two belts.
the machine can’t go above about 75
it would explain loose/too tight belts while moving, and could trigger ‘too far
off’ stops, but does NOT explain why a “Release Tension” command was being
issued. the browser being in the crippled ‘captive portal’ mode would explain
that (javascript doesn’t work normally in that mode)
What surprised me: the machine looked completely normal sitting there, and
Apply Tension passed clean — so I almost dismissed the high Z. It only showed
up once things started moving.The fix — and notably I did NOT need to retract + extend the belts:
- Released tension.
- Moved the sled to a spot where the bit could travel all the way down without hitting my workpiece.
- Jogged Z fully down to the physical bottom stop.
- Hit Set Z-Stop (
$SETZSTOP).- Raised Z back up to my z-home height and re-set Z Home.
- Re-applied tension → jog tests came back normal.
This is the correct sequence
Afterward machine Z read a sane 64 instead of 176, and jogging X/Y no longer drops tension.
was there any change in how the browser accessed the maslow?
Two things worth flagging for anyone hitting this: Define Z Home (
G10 L20)
does NOT fix it — that only sets work Z; only Set Z-Stop
re-establishes the machine Z. And after Set Z-Stop you have to re-Define Z
Home before cutting, or your cut depths reference a stale zero.
correct, setting Z stop in older versions doesn’t change where Z home is
physically, but changes the number for z home to be relative to the new z stop.
in current versions, setting z stop sets z home at the same time (avoiding
really strange things happening to the z value)
on the display
the Xm,Ym,Zm are relative to the machine 0,0 (center) and Z stop
the X,Y,Z are relative to the home (xy home and Z home)
David Lang