Hi folks,
with the help from Olaf, I bumped off most probs but this one has appeared
again. I have three makerbot clone endstops x min, y min, and z max, the red ones
from eBay. If I movethe extruder away, when turned off, and then issue a autohome
through the 12864 lcd everything works.

If I manually issue a move that sends the extruder into the x min endstop, it doesn't
stop. If I manually trigger the x min endstop whilst the extruder is moving to x min, it
doesn't stop.

Oh, z max endstop works and I haven't checked the y min yet.

Any ideas?

Many thanks,
Andrew

Marlin has what is called soft limits. That is the endstop is used only for finding home position.
If in your config file you have #define X_MIN_POS 0 the software should not let the head go past 0

Mine are set as
#define X_MAX_POS 200 // prevents head from going past 200 and jambing
#define X_MIN_POS -20 // head home position 20mm left of bed
#define Y_MAX_POS 180
#define Y_MIN_POS 0
#define Z_MAX_POS 180
#define Z_MIN_POS 0
If you configure the endstops to work as limit switches you need a switch on both sides to limit travel in both directions.

Hi folks,
Appears a little cross communication has occurred. The problem appears to
have gone away. First I discovered the M119 command, which would have solved
so many problems to date. Plus it appears I tinkered in config_adv.h unwisely again
and did the following,
#define ENDSTOPS_ONLY_FOR_HOMING

Bit of an obvious mistake.
Just need to figure out now, do I hard code the Zmin into the firmware or can I
adjust that on the fly from the LCD? What does


Many thanks,
Andrew